35 results on '"PENASA, L."'
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2. Pulsed Production of Antihydrogen in AEgIS
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Zurlo N., Auzins M., Bergmann B., Bonomi G., Brusa R.S., Burian P., Camper A., Castelli F., Ciury R., Consolati G., Doser M., Farricker A., Glöggler L., Graczykowski Ł., Grosbart M., Guatieri F., Gusakova N., Haider S., Huck S., Janik M., Kasprowicz G., Khatri G., Kłosowski Ł., Kornakov G., Krumins V., Lappo L., Linek A., Malamant J., Malbrunot C., Mariazzi S., Nowak L., Nowicka D., Oswald E., Pagano D., Penasa L., Piwiński M., Pospisil S., Povolo L., Prelz F., Rangwala S., Rienäcker B., Røhne O.M., Rotondi A., Sandaker H., Smolyanskiy P., Sowiński T., Tefelski D., Testera G., Volponi M., Welsch C.P., Wolz T., Zawada M., and Zielinski J.
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Physics ,QC1-999 - Abstract
Low-temperature antihydrogen atoms are an effective tool to probe the validity of the fundamental laws of Physics, for example the Weak Equivalence Principle (WEP) for antimatter, and -generally speaking- it is obvious that colder atoms will increase the level of precision. After the first production of cold antihydrogen in 2002 [1], experimental efforts have substantially progressed, with really competitive results already reached by adapting to cold antiatoms some well-known techniques pre- viously developed for ordinary atoms. Unfortunately, the number of antihydrogen atoms that can be produced in dedicated experiments is many orders of magnitude smaller than of hydrogen atoms, so the development of novel techniques to enhance the production of antihydrogen with well defined (and possibly controlled) conditions is essential to improve the sensitivity. We present here some experimental results achieved by the AEgIS Collaboration, based at the CERN AD (Antiproton Decelerator) on the production of antihydrogen in a pulsed mode where the production time of 90% of atoms is known with an uncertainty of ~ 250 ns [2]. The pulsed antihydrogen source is generated by the charge-exchange reaction between Rydberg positronium (Ps*) and an antiproton (p¯): p¯ + Ps* → H¯* + e−, where Ps* is produced via the implantation of a pulsed positron beam into a mesoporous silica target, and excited by two consecutive laser pulses, and antiprotons are trapped, cooled and manipulated in Penning-Malmberg traps. The pulsed production (which is a major milestone for AEgIS) makes it possible to select the antihydrogen axial temperature and opens the door for the tuning of the antihydrogen Rydberg states, their de-excitation by pulsed lasers and the manipulation through electric field gradients. In this paper, we present the results achieved by AEgIS in 2018, just before the Long Shutdown 2 (LS2), as well as some of the ongoing improvements to the system, aimed at exploiting the lower energy antiproton beam from ELENA [3].
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- 2023
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3. AEg̅IS latest results
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Guatieri F., Aghion S., Amsler C., Angela G., Bonomi G., Brusa R.S., Caccia M., Caravita R., Castelli F., Cerchiari G., Comparat D., Consolati G., Demetrio A., Di Noto L., Doser M., Evans C., Fanì M., Ferragut R., Fesel J., Fontana A., Gerber S., Giammarchi M., Gligorova A., Haider S., Hinterberger A., Holmestad H., Kellerbauer A., Krasnický D., Lagomarsino V., Lansonneur P., Lebrun P., Malbrunot C., Mariazzi S., Matveev V., Mazzotta Z., Müller S.R., Nebbia G., Nedelec P., Oberthaler M., Pacifico N., Pagano D., Penasa L., Petracek V., Prelz F., Prevedelli M., Rienaecker B., Robert J., Rhne. O.M., Rotondi A., Sacerdoti M., Sandaker H., Santoro R., Simon M., Smestad L., Sorrentino F., Testera G., Tietje I.C., Widmann E., Yzombard P., Zimmer C., Zmeskal J., and Zurlo N.
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Physics ,QC1-999 - Abstract
The validity of the Weak Equivalence Principle (WEP) as predicted by General Relativity has been tested up to astounding precision using ordinary matter. The lack hitherto of a stable source of a probe being at the same time electrically neutral, cold and stable enough to be measured has prevented highaccuracy testing of the WEP on anti-matter. The AEg̅IS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) experiment located at CERN's AD (Antiproton Decelerator) facility aims at producing such a probe in the form of a pulsed beam of cold anti-hydrogen, and at measuring by means of a moiré deflectometer the gravitational force that Earth's mass exerts on it. Low temperature and abundance of the H̅ are paramount to attain a high precision measurement. A technique employing a charge-exchange reaction between antiprotons coming from the AD and excited positronium atoms is being developed at AEg̅IS and will be presented hereafter, alongside an overview of the experimental apparatus and the current status of the experiment
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- 2018
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4. Towards the first measurement of matter-antimatter gravitational interaction
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Evans C., Aghion S., Amsler C., Bonomi G., Brusa R.S., Caccia M., Caravita R., Castelli F., Cerchiari G., Comparat D., Consolati G., Demetrio A., Di Noto L., Doser M., Fani M., Ferragut R., Fesel J., Fontana A., Gerber S., Giammarchi M., Gligorova A., Guatieri F., Haider S., Hinterberger A., Holmestad H., Kellerbauer A., Khalidova O., Krasnický D., Lagomarsino V., Lansonneur P., Lebrun P., Malbrunot C., Mariazzi S., Marton J., Matveev V., Mazzotta Z., Müller S.R., Nebbia G., Nedelec P., Oberthaler M., Pacifico N., Pagano D., Penasa L., Petracek V., Prelz F., Prevedelli M., Ravelli L., Rienaecker B., Robert J., Røhne O.M., Rotondi A., Sandaker H., Santoro R., Smestad L., Sorrentino F., Testera G., Tietje I.C., Widmann E., Yzombard P., Zimmer C., Zmeskal J., and Zurlo N.
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Physics ,QC1-999 - Abstract
The AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) is a CERN based experiment with the central aim to measure directly the gravitational acceleration of antihydrogen. Antihydrogen atoms will be produced via charge exchange reactions which will consist of Rydberg-excited positronium atoms sent to cooled antiprotons within an electromagnetic trap. The resulting Rydberg antihydrogen atoms will then be horizontally accelerated by an electric field gradient (Stark effect), they will then pass through a moiré deflectometer. The vertical deflection caused by the Earth's gravitational field will test for the first time the Weak Equivalence Principle for antimatter. Detection will be undertaken via a position sensitive detector. Around 103 antihydrogen atoms are needed for the gravitational measurement to be completed. The present status, current achievements and results will be presented, with special attention toward the laser excitation of positronium (Ps) to the n=3 state and the production of Ps atoms in the transmission geometry.
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- 2018
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5. Probing antimatter gravity – The AEGIS experiment at CERN
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Kellerbauer A., Aghion S., Amsler C., Ariga A., Ariga T., Bonomi G., Bräunig P., Bremer J., Brusa R. S., Cabaret L., Caccia M., Caravita R., Castelli F., Cerchiari G., Chlouba K., Cialdi S., Comparat D., Consolati G., Demetrio A., Di Noto L., Doser M., Dudarev A., Ereditato A., Evans C., Ferragut R., Fesel J., Fontana A., Gerber S., Giammarchi M., Gligorova A., Guatieri F., Haider S., Holmestad H., Huse T., Jordan E., Kimura M., Koettig T., Krasnický D., Lagomarsino V., Lansonneur P., Lebrun P., Lehner S., Liberadzka J., Malbrunot C., Mariazzi S., Matveev V., Mazzotta Z., Nebbia G., Nédélec P., Oberthaler M., Pacifico N., Pagano D., Penasa L., Petráček V., Pistillo C., Prelz F., Prevedelli M., Ravelli L., Rienäcker B., Røhne O.M., Rotondi A., Sacerdoti M., Sandaker H., Santoro R., Scampoli P., Smestad L., Sorrentino F., Špaček M., Storey J., Strojek I.M., Testera G., Tietje I., Widmann E., Yzombard P., Zavatarelli S., Zmeskal J., and Zurlo N.
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Physics ,QC1-999 - Abstract
The weak equivalence principle states that the motion of a body in a gravitational field is independent of its structure or composition. This postulate of general relativity has been tested to very high precision with ordinary matter, but no relevant experimental verification with antimatter has ever been carried out. The AEGIS experiment will measure the gravitational acceleration of antihydrogen to ultimately 1% precision. For this purpose, a pulsed horizontal antihydrogen beam with a velocity of several 100 m s−1 will be produced. Its vertical deflection due to gravity will be detected by a setup consisting of material gratings coupled with a position-sensitive detector, operating as a moiré deflectometer or an atom interferometer. The AEGIS experiment is installed at CERN’s Antiproton Decelerator, currently the only facility in the world which produces copious amounts of low-energy antiprotons. The construction of the setup has been going on since 2010 and is nearing completion. A proof-of-principle experiment with antiprotons has demonstrated that the deflection of antiparticles by a few μm due to an external force can be detected. Technological and scientific development pertaining to specific challenges of the experiment, such as antihydrogen formation by positronium charge exchange or the position-sensitive detection of antihydrogen annihilations, is ongoing.
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- 2016
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6. Experiments with low-energy antimatter
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Consolati G., Aghion S., Amsler C., Ariga A., Ariga T., Belov A., Bonomi G., Bräunig P., Bremer J., Brusa R.S., Cabaret L., Caccia M., Caravita R., Castelli F., Cerchiari G., Chlouba K., Cialdi S., Comparat D., Demetrio A., Derking H., Di Noto L., Doser M., Dudarev A., Ereditato A., Ferragut R., Fontana A., Gerber S., Giammarchi M., Gligorova A., Gninenko S., Haider S., Hogan S., Holmestad H., Huse T., Jordan E. J., Kawada J., Kellerbauer A., Kimura M., Krasnicky D., Lagomarsino V., Lehner S., Malbrunot C., Mariazzi S., Matveev V., Mazzotta Z., Nebbia G., Nedelec P., Oberthaler M., Pacifico N., Penasa L., Petracek V., Pistillo C., Prelz F., Prevedelli M., Ravelli L., Riccardi C., Røhne O.M., Rosenberger S., Rotondi A., Sacerdoti M., Sandaker H., Santoro R., Scampoli P., Simon M., Spacek M., Storey J., Strojek I. M., Subieta M., Testera G., Widmann E., Yzombard P., Zavatarelli S., and Zmeskal J.
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Physics ,QC1-999 - Abstract
Investigations on antimatter allow us to shed light on fundamental issues of contemporary physics. The only antiatom presently available, antihydrogen, is produced making use of the Antiproton Decelerator (AD) facility at CERN. International collaborations currently on the floor (ALPHA, ASACUSA and ATRAP) have succeeded in producing antihydrogen and are now involved in its confinement and manipulation. The AEGIS experiment is currently completing the commissioning of the apparatus which will generate and manipulate antiatoms. The present paper, after a report on the main results achieved with antihydrogen physics, gives an overview of the AEGIS experiment, describes its current status and discusses its first target.
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- 2015
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7. Antimatter Gravity Measurements with Cold Antihydrogen: the AEgIS Experiment
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Doser, M., Amsler, C., Ariga, T., Bonomi, G., Braunig, P., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Kellerbauer, A., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Rienaecker, B., Røhne, O. M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Smestad, L., Sorrentino, F., Strojek, I. M., Testera, G., Tietje, I. C., Vamosi, S., Widmann, E., Yzombard, P., Zmeskal, J., and Zurlo, N.
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Nuclear physics ,Physics ,Gravitation ,Antimatter ,Gravity (chemistry) ,CPT Symetry, Antimatter, Gravity ,CPT Symetry ,Gravity ,Equivalence principle ,Antihydrogen ,Charge exchange - Published
- 2017
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8. Experiments with low-energy antimatter
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Aghion, S., Gerber, S., Mariazzi, S., Malbrunot, C., Eidelman, S., Caravita, R., Demetrio, A., Zavatarelli, S., Di Noto, L., Storey, James William, Giardina, G., Rotondi, A., Petracek, V., Fontana, A., Testera, G., Amsler, Claude, Oberthaler, M., Comparat, D., Rosenberger, S., Brusa, R.S., Bonomi, G., Nedelec, P., Doser, M., Consolati, G., Lehner, S., Prelz, F., Riccardi, C., Cabaret, L., Zmeskal, J., Castelli, F., Derking, H., Chlouba, K., Jordan, E. J., Pacifico, N., Widmann, E., Bremer, J., Sacerdoti, M., Mandaglio, G., Hogan, S., Giammarchi, M., Ariga, Akitaka, Gligorova, A., Scampoli, Paola, Pistillo, Ciro, Strojek, I. M., Gninenko, S., Simon, M., Nebbia, G., Santoro, R., Kimura, Mitsuhiro, Cerchiari, G., Kellerbauer, A., Penasa, L., Kawada, Jiro, Venanzoni, G., Battaglieri, M., Cialdi, S., Dudarev, A., Prevedelli, M., Ariga, Tomoko, Matveev, V., Yzombard, P., Caccia, M., Krasnicky, D., Sandaker, H., Røhne, O.M., Holmestad, H., Bräunig, P., Ereditato, Antonio, Mazzotta, Z., Belov, A., Subieta, M., Ferragut, R., Lagomarsino, V., Ravelli, L., Haider, S., Huse, T., Spacek, M., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), G., Giardina, G., Consolati, S., Aghion, C., Amsler, A., Ariga, T., Ariga, A., Belov, G., Bonomi, P., Bräunig, J., Bremer, R. S., Brusa, L., Cabaret, M., Caccia, R., Caravita, F., Castelli, G., Cerchiari, K., Chlouba, S., Cialdi, D., Comparat, A., Demetrio, H., Derking, L., Di Noto, M., Doser, A., Dudarev, A., Ereditato, R., Ferragut, A., Fontana, S., Gerber, M., Giammarchi, A., Gligorova, S., Gninenko, S., Haider, S., Hogan, H., Holmestad, T., Huse, E. J., Jordan, J., Kawada, A., Kellerbauer, M., Kimura, D., Krasnicky, V., Lagomarsino, S., Lehner, C., Malbrunot, S., Mariazzi, V., Matveev, Z., Mazzotta, G., Nebbia, P., Nedelec, M., Oberthaler, N., Pacifico, L., Penasa, V., Petracek, C., Pistillo, F., Prelz, M., Prevedelli, L., Ravelli, C., Riccardi, O. M., Røhne, S., Rosenberger, A., Rotondi, M., Sacerdoti, H., Sandaker, R., Santoro, Scampoli, Paola, M., Simon, M., Spacek, J., Storey, I. M., Strojek, M., Subieta, G., Testera, E., Widmann, P., Yzombard, S., Zavatarelli, J., Zmeskal, S., Eidelman, G., Venanzoni, M., Battaglieri, and G., Mandaglio
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Physics ,Large Hadron Collider ,530 Physics ,QC1-999 ,PLASMAS ,ANTIHYDROGEN BEAM ,AEGIS EXPERIMENT ,PENNING TRAP ,GRAVITY ,SILICA ,ATOMS ,Nuclear physics ,Antiproton Decelerator ,Physics and Astronomy (all) ,Low energy ,Antimatter ,Systems engineering ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Antihydrogen ,GeneralLiterature_REFERENCE(e.g.,dictionaries,encyclopedias,glossaries) ,Particle Physics - Experiment ,ComputingMilieux_MISCELLANEOUS - Abstract
Investigations on antimatter allow us to shed light on fundamental issues of contemporary physics. The only antiatom presently available, antihydrogen, is produced making use of the Antiproton Decelerator (AD) facility at CERN. International collaborations currently on the floor (ALPHA, ASACUSA and ATRAP) have succeeded in producing antihydrogen and are now involved in its confinement and manipulation. The AEGIS experiment is currently completing the commissioning of the apparatus which will generate and manipulate antiatoms. The present paper, after a report on the main results achieved with antihydrogen physics, gives an overview of the AEGIS experiment, describes its current status and discusses its first target.
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- 2015
- Full Text
- View/download PDF
9. Testing the Weak Equivalence Principle with an antimatter beam at CERN
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L. Ravelli, Patrick Nedelec, Davide Pagano, N. Pacifico, Sebastiano Mariazzi, Jiro Kawada, L. Di Noto, Johann Zmeskal, Luca Penasa, I. M. Strojek, S. Rosenberger, Massimo Caccia, Eberhard Widmann, V. Lagomarsino, Giovanni Consolati, H. Derking, Germano Bonomi, M. Sacerdoti, S. Haider, Romualdo Santoro, M. Subieta, Roberto S. Brusa, Ole Røhne, Paola Scampoli, James William Storey, M. Spacek, V. Petracek, M. Kimura, Marco Prevedelli, Claude Amsler, K. Chlouba, Alberto Rotondi, Tomoko Ariga, F. Prelz, D. Krasnicky, A. Demetrio, Heidi Sandaker, Alexey Dudarev, Giovanni Cerchiari, M. Oberthaler, Daniel Comparat, Adriano Fontana, Angela Gligorova, Chloé Malbrunot, L. Cabaret, P. Yzombard, Marco Giammarchi, Antonio Ereditato, T. Huse, Cristina Riccardi, G. Testera, J. Bremer, Z. Mazzotta, Simone Cialdi, Sandra Zavatarelli, E. Jordan, Felice Sorrentino, Alban Kellerbauer, A. S. Belov, Akitaka Ariga, Fabrizio Castelli, Michael Doser, H. Holmestad, Sebastian Gerber, P. Bräunig, S. N. Gninenko, C. Pistillo, Ruggero Caravita, Stefano Aghion, V. A. Matveev, Sebastian Lehner, Rafael Ferragut, G. Nebbia, Kimura, M, Aghion, S, Amsler, C, Ariga, A, Ariga, T, Belov, A, Bonomi, G, Bräunig, P, Bremer, J, Brusa, R S, Cabaret, L, Caccia, M, Caravita, R, Castelli, F, Cerchiari, G, Chlouba, K, Cialdi, S, Comparat, D, Consolati, G, Demetrio, A, Derking, H, Noto, L Di, Doser, M, Dudarev, A, Ereditato, A, Ferragut, R, Fontana, A, Gerber, S, Giammarchi, M, Gligorova, A, Gninenko, S, Haider, S, Holmestad, H, Huse, T, Jordan, E J, Kawada, J, Kellerbauer, A, Krasnicky, D, Lagomarsino, V, Lehner, S, Malbrunot, C, Mariazzi, S, Matveev, V, Mazzotta, Z, Nebbia, G, Nedelec, P, Oberthaler, M, Pacifico, N, Pagano, D, Penasa, L, Petracek, V, Pistillo, C, Prelz, F, Prevedelli, M, Ravelli, L, Riccardi, C, Røhne, O M, Rosenberger, S, Rotondi, A, Sacerdoti, M, Sandaker, H, Santoro, R, Scampoli, P, Sorrentino, F, Spacek, M, Strojek, I M, Storey, J, Subieta, M, Testera, G, Widmann, E, Yzombard, P, Zavatarelli, S, Zmeskal, J, Kimura, M., Aghion, S., Amsler, C., Ariga, A., Ariga, T., Belov, A., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Derking, H., Noto, L. Di, Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Haider, S., Holmestad, H., Huse, T., Jordan, E. J., Kawada, J., Kellerbauer, A., Krasnicky, D., Lagomarsino, V., Lehner, S., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Riccardi, C., Røhne, O. M., Rosenberger, S., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, Paola, Sorrentino, F., Spacek, M., Strojek, I. M., Storey, J., Subieta, M., Testera, G., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and AEGIS
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Photographic emulsions ,Atoms ,History ,Particle physics ,Physics::General Physics ,530 Physics ,Nuclear emulsions ,Gravitational acceleration ,7. Clean energy ,Education ,Nuclear physics ,Physics and Astronomy (all) ,Positron ,NUCLEAR-EMULSIONS ,Gravitational accelerations ,Physics and Astronomy (all), NUCLEAR-EMULSIONS ,AEGIS EXPERIMENT ,ANTIPROTONS ,POSITRONIUM ,SYSTEM ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Physics::Atomic and Molecular Clusters ,Vertical displacements ,Nuclear emulsion ,Physics::Atomic Physics ,particle physics, gravity ,Antihydrogen ,Gravitational forces ,Stark accelerator ,Physics ,Large Hadron Collider ,Emulsification ,Tracking (position) ,Antihydrogen atoms ,Fundamental laws ,Weak equivalence principle ,Detector ,Computer Science Applications ,Antiproton ,Antimatter ,Physics::Accelerator Physics ,Particle Physics - Experiment - Abstract
International audience; The goal of the AEgIS experiment is to measure the gravitational acceleration of antihydrogen ? the simplest atom consisting entirely of antimatter ? with the ultimate precision of 1%. We plan to verify the Weak Equivalence Principle (WEP), one of the fundamental laws of nature, with an antimatter beam. The experiment consists of a positron accumulator, an antiproton trap and a Stark accelerator in a solenoidal magnetic field to form and accelerate a pulsed beam of antihydrogen atoms towards a free-fall detector. The antihydrogen beam passes through a moir? deflectometer to measure the vertical displacement due to the gravitational force. A position and time sensitive hybrid detector registers the annihilation points of the antihydrogen atoms and their time-of-flight. The detection principle has been successfully tested with antiprotons and a miniature moir? deflectometer coupled to a nuclear emulsion detector.
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- 2015
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10. Gravity and antimatter: The AEgIS experiment at CERN
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A. Hinterberger, L. Smestad, G. Nebbia, G. Testera, Marco Prevedelli, Marco Giammarchi, J. Robert, Nicola Pacifico, I. C. Tietje, Luca Penasa, Johann Marton, Fabrizio Castelli, Fiodor Sorrentino, Z. Mazzotta, P. Lebrun, Michael Doser, Alban Kellerbauer, Rafael Ferragut, Victor Matveev, Heidi Sandaker, Nicola Zurlo, L. Ravelli, O. Khalidova, S. Haider, Davide Pagano, Giovanni Consolati, Germano Bonomi, C. Zimmer, H. Holmestad, Sebastiano Mariazzi, Ole Røhne, M. Oberthaler, Angela Gligorova, Stefano Aghion, Chloé Malbrunot, Sebastian Gerber, S.R. Müller, Ruggero Caravita, Patrick Nedelec, Johann Zmeskal, F. Guatieri, Romualdo Santoro, P. Yzombard, Alberto Rotondi, J. Fesel, Eberhard Widmann, P. Lansonneur, V. Lagomarsino, B. Rienaecker, L. Di Noto, Claude Amsler, Massimo Caccia, Daniel Comparat, Giovanni Cerchiari, D. Krasnický, A. Demetrio, F. Prelz, Roberto S. Brusa, V. Petracek, M. Fanì, A. Evans, Adriano Fontana, Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Pagano D., Aghion S., Amsler C., Bonomi G., Brusa R.S., Caccia M., Caravita R., Castelli F., Cerchiari G., Comparat D., Consolati G., Demetrio A., Noto L.D., Doser M., Evans A., Fani M., Ferragut R., Fesel J., Fontana A., Gerber S., Giammarchi M., Gligorova A., Guatieri F., Haider S., Hinterberger A., Holmestad H., Kellerbauer A., Khalidova O., Krasnicky D., Lagomarsino V., Lansonneur P., Lebrun P., Malbrunot C., Mariazzi S., Marton J., Matveev V., Mazzotta Z., Muller S.R., Nebbia G., Nedelec P., Oberthaler M., Pacifico N., Penasa L., Petracek V., Prelz F., Prevedelli M., Ravelli L., Rienaecker B., Robert J., Rohne O.M., Rotondi A., Sandaker H., Santoro R., Smestad L., Sorrentino F., Testera G., Tietje I.C., Widmann E., Yzombard P., Zimmer C., Zmeskal J., and Zurlo N.
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History ,Particle physics ,Physics::General Physics ,experimental methods ,CERN Lab ,General relativity ,Measure (physics) ,01 natural sciences ,Education ,Gravitational field ,0103 physical sciences ,Physics::Atomic and Molecular Clusters ,general relativity ,antimatter ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Equivalence principle ,010306 general physics ,Antihydrogen ,Physics ,antihydrogen ,Large Hadron Collider ,General Relativity and Cosmology ,010308 nuclear & particles physics ,atom ,gravitation: interaction ,Computer Science Applications ,experimental equipment ,equivalence principle ,Antimatter ,force: gravitation ,[PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc] ,gravity, antimatter ,Particle Physics - Experiment ,Beam (structure) ,experimental results - Abstract
From the experimental point of view, very little is known about the gravitational interaction between matter and antimatter. In particular, the Weak Equivalence Principle, which is of paramount importance for the General Relativity, has not yet been directly probed with antimatter. The main goal of the AEgIS experiment at CERN is to perform a direct measurement of the gravitational force on antimatter. The idea is to measure the vertical displacement of a beam of cold antihydrogen atoms, traveling in the gravitational field of the Earth, by the means of a moiré deflectometer. An overview of the physics goals of the experiment, of its apparatus and of the first results is presented.
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- 2020
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11. Developments for pulsed antihydrogen production towards direct gravitational measurement on antimatter
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Alberto Rotondi, S. Müller, G. Nebbia, Davide Pagano, O. Khalidova, Massimo Caccia, L. Povolo, Giovanni Consolati, V. Toso, Germano Bonomi, Heidi Sandaker, V. Petráček, A. Hinterberger, L. T. Glöggler, Sebastiano Mariazzi, B. Rienäcker, C. Zimmer, L. Di Noto, Marco Giammarchi, Marco Prevedelli, M. Antonello, Chloé Malbrunot, G. Testera, Angela Gligorova, Ole Røhne, Nicola Zurlo, Sebastian Gerber, Fabrizio Castelli, Alban Kellerbauer, A. S. Belov, I. C. Tietje, D. Krasnicky, V. Lagomarsino, M. Fanì, L. Nowak, Romualdo Santoro, Michael Doser, Patrick Nedelec, E. Oswald, J. Fesel, V. Matveev, S. Haider, P. Cheinet, A. Demetrio, F. Guatieri, Luca Penasa, A. Camper, F. Prelz, Daniel Comparat, Ruggero Caravita, T. Wolz, Markus K. Oberthaler, R. S. Brusa, Rafael Ferragut, Fani M., Antonello M., Belov A., Bonomi G., Brusa R.S., Caccia M., Camper A., Caravita R., Castelli F., Comparat D., Cheinet P., Consolati G., Demetrio A., Di Noto L., Doser M., Ferragut R., Fesel J., Gerber S., Giammarchi M., Gligorova A., Gloggler L.T., Guatieri F., Haider S., Hinterberger A., Kellerbauer A., Khalidova O., Krasnicky D., Lagomarsino V., Malbrunot C., Nowak L., Mariazzi S., Matveev V., Muller S.R., Nebbia G., Nedelec P., Oberthaler M., Oswald E., Pagano D., Penasa L., Petracek V., Povolo L., Prelz F., Prevedelli M., Rienacker B., Rohne O.M., Rotondi A., Sandaker H., Santoro R., Testera G., Tietje I.C., Toso V., Wolz T., Zimmer C., Zurlo N., Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
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Gravity (chemistry) ,Physics::General Physics ,Antimatter ,experimental methods ,Gravity ,Antiproton ,magnetic field ,Positronium ,01 natural sciences ,010305 fluids & plasmas ,Nuclear physics ,Gravitation ,temperature: low ,0103 physical sciences ,general relativity ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Physics::Atomic and Molecular Clusters ,Physics::Atomic Physics ,010306 general physics ,Antihydrogen ,Mathematical Physics ,Physics ,gravitation: interaction ,antihydrogen: production ,talk: Kolymbari 2019/08/21 ,sensitivity ,charge exchange ,Condensed Matter Physics ,pulsed ,Atomic and Molecular Physics, and Optics ,anti-p ,equivalence principle ,gravitation: acceleration ,gravitation: local ,experimental results - Abstract
International audience; A main scientific goal of the experiment is the direct measurement of the Earth’s local gravitational acceleration g on antihydrogen. The Weak Equivalence Principle is a foundation of General Relativity. It has been extensively tested with ordinary matter but very little is known about the gravitational interaction between matter and antimatter. Antihydrogen is produced in via resonant charge-exchange reaction between cold Rydberg-excited positronium and cooled down antiprotons. The achievements for the development of a pulsed cold antihydrogen source are presented. Large number of antiprotons, necessary for a significant production rate of antihydrogen, are captured, accumulated, compressed and cooled over an extended period of time. Positronium (Ps) is formed through e$^{+}$-Ps conversion in a silica porous target at 10 K temperature in a reflection geometry inside the main apparatus. The so-formed Ps cloud is then laser-excited to Rydberg levels, for the first time in a 1 T magnetic field. Consequently, a detailed characterization of the Ps source for antihydrogen production in magnetic field needed to be performed. Several detection techniques are extensively used to monitor antiproton and positron manipulations in the formation process of antihydrogen inside the main apparatus. Positronium detection techniques underwent extensive improvements in sensitivity during the last antiproton run. At the same time, major efforts to improve integrate and commission the detectors sensitive to antihydrogen production took place.
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- 2020
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12. A cryogenic tracking detector for antihydrogen detection in the AEgIS experiment
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J. Wuethrich, Alberto Rotondi, Daniel Comparat, O. Khalidova, Alban Kellerbauer, Ole Røhne, P.A. Ekman, G. Testera, G. Nebbia, Davide Pagano, P. Hackstock, Marco Prevedelli, M. Antonello, Fabrizio Castelli, A. Camper, Sebastian Gerber, Massimo Caccia, D. Haider, C. Zimmer, Michael Doser, F. Prelz, I. C. Tietje, L. Nowak, Heidi Sandaker, Sebastiano Mariazzi, A. Hinterberger, S. Haider, F. Guatieri, Romualdo Santoro, Marco Giammarchi, A. S. Belov, Rafael Ferragut, D. Krasnický, J. Robert, A. Demetrio, Chloé Malbrunot, V. Toso, P. Yzombard, Giovanni Consolati, Germano Bonomi, L. Di Noto, V. Lagomarsino, James William Storey, Claude Amsler, T. Wolz, S.R. Müller, Ruggero Caravita, V. A. Matveev, B. Rienaecker, Luca Penasa, M. Oberthaler, Roberto S. Brusa, V. Petracek, Angela Gligorova, Patrick Nedelec, Nicola Zurlo, M. Fanì, E. Oswald, Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Amsler, C., Antonello, M., Belov, A., Bonomi, G., Brusa, R.S., Caccia, M., Camper, A., Caravita, R., Castelli, F., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Ekman, P.A., Fanì, M., Ferragut, R., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Hackstock, P., Haider, D., Haider, S., Hinterberger, A., Kellerbauer, A., Khalidova, O., Krasnický, D., Lagomarsino, V., Malbrunot, C., Mariazzi, S., Matveev, V., Müller, S.R., Nebbia, G., Nedelec, P., Nowak, L., Oberthaler, M., Oswald, E., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Røhne, O.M., Rotondi, A., Sandaker, H., Santoro, R., Storey, J., Testera, G., Tietje, I.C., Toso, V., Wolz, T., Wuethrich, J., Yzombard, P., Zimmer, C., Zurlo, N., École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
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Physics - Instrumentation and Detectors ,Atomic Physics (physics.atom-ph) ,Physics::Instrumentation and Detectors ,Antiproton ,Cryogenics ,Antihydrogen ,Antimatter ,Cryogenic tracker ,Gravity ,Positron ,Scintillator detector ,Tracking (particle physics) ,01 natural sciences ,High Energy Physics - Experiment ,Physics - Atomic Physics ,High Energy Physics - Experiment (hep-ex) ,tracking detector ,Physics::Atomic Physics ,Detectors and Experimental Techniques ,Instrumentation ,time resolution ,Physics ,Detector ,Instrumentation and Detectors (physics.ins-det) ,cryogenics ,performance ,Nuclear and High Energy Physics ,antihydrogen: annihilation ,FOS: Physical sciences ,Superconducting magnet ,Silicon photomultiplier ,Optics ,0103 physical sciences ,Physics::Atomic and Molecular Clusters ,scintillation counter: fibre ,photomultiplier: silicon ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,010306 general physics ,detector: design ,activity report ,antimatter, gravity ,010308 nuclear & particles physics ,business.industry ,Physics::Accelerator Physics ,business ,pi: particle identification - Abstract
We present the commissioning of the Fast Annihilation Cryogenic Tracker detector (FACT), installed around the antihydrogen production trap inside the 1 T superconducting magnet of the AEgIS experiment. FACT is designed to detect pions originating from the annihilation of antiprotons. Its 794 scintillating fibers operate at 4K and are read out by silicon photomultipliers (MPPCs) at near room temperature. FACT provides the antiproton/antihydrogen annihilation position information with a few ns timing resolution. We present the hardware and software developments which led to the successful operation of the detector for antihydrogen detection and the results of an antiproton-loss based efficiency assessment. The main background to the antihydrogen signal is that of the positrons impinging onto the positronium conversion target and creating a large amount of gamma rays which produce a sizeable signal in the MPPCs shortly before the antihydrogen signal is expected. We detail the characterization of this background signal and its impact on the antihydrogen detection efficiency. We present the commissioning of the Fast Annihilation Cryogenic Tracker detector (FACT), installed around the antihydrogen production trap inside the 1 T superconducting magnet of the AEḡIS experiment. FACT is designed to detect pions originating from the annihilation of antiprotons. Its 794 scintillating fibers operate at 4 K and are read out by silicon photomultipliers (MPPCs) at near room temperature. FACT provides the antiproton/antihydrogen annihilation position information with a few ns timing resolution. We present the hardware and software developments which led to the successful operation of the detector for antihydrogen detection and the results of an antiproton-loss based efficiency assessment. The main background to the antihydrogen signal is that of the positrons impinging onto the positronium conversion target and creating a large amount of gamma rays which produce a sizeable signal in the MPPCs shortly before the antihydrogen signal is expected. We detail the characterization of this background signal and its impact on the antihydrogen detection efficiency.
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- 2020
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13. Spectrophotometric variegation of the layering in comet 67P/Churyumov-Gerasimenko as seen by OSIRIS
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Cesare Barbieri, W-H. Ip, Pedro J. Gutiérrez, Jakob Deller, Björn Davidsson, D. Bodewits, Gloria Tognon, R. Rodrigo, F. La Forgia, V. Petropoulou, Philippe Lamy, Prasanna Deshapriya, H. U. Keller, Cecilia Tubiana, M. A. Barucci, Holger Sierks, V. Da Deppo, Carsten Güttler, Matteo Massironi, Marco Fulle, Imre Toth, Michel Franceschi, Sabrina Ferrari, Giampiero Naletto, Alice Lucchetti, Detlef Koschny, M. De Cecco, E. Frattin, Sonia Fornasier, J. J. Lopez-Moreno, Monica Lazzarin, Maurizio Pajola, Ivano Bertini, Luca Penasa, Luisa Lara, Francesca Ferri, Francesco Marzari, Pamela Cambianica, Jean-Loup Bertaux, Gabriele Cremonese, Stefano Debei, Xian Shi, Stefano Mottola, Centro di Ateneo di Studi e Attività Spaziali 'Giuseppe Colombo' (CISAS), Universita degli Studi di Padova, Dipartimento di Fisica e Astronomia 'Galileo Galilei', Dipartimento di Geoscienze [Padova], CNR Istituto di Fotonica e Nanotecnologie [Padova] (IFN), Consiglio Nazionale delle Ricerche [Roma] (CNR), INAF - Osservatorio Astronomico di Padova (OAPD), Istituto Nazionale di Astrofisica (INAF), Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, Jet Propulsion Laboratory (JPL), California Institute of Technology (CALTECH)-NASA, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Konkoly Observatory, Research Centre for Astronomy and Earth Sciences [Budapest], Hungarian Academy of Sciences (MTA)-Hungarian Academy of Sciences (MTA), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), International Space Science Institute [Bern] (ISSI), Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA), Department of Physics [Auburn], Auburn University (AU), CNR Institute for Photonics and Nanotechnologies (IFN), Department of Industrial Engineering [Padova], University of Trento [Trento], INAF - Osservatorio Astronomico di Trieste (OAT), Space Science Institute [Macau] (SSI), Macau University of Science and Technology (MUST), Institute of Astronomy [Taiwan] (IANCU), National Central University [Taiwan] (NCU), Institut für Geophysik und Extraterrestrische Physik [Braunschweig] (IGEP), Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig], Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Università degli Studi di Padova = University of Padua (Unipd), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), NASA-California Institute of Technology (CALTECH), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Agence Spatiale Européenne = European Space Agency (ESA), German Centre for Air and Space Travel, Centre National D'Etudes Spatiales (France), Agenzia Spaziale Italiana, Agencia Estatal de Investigación (España), European Space Agency, Swedish National Space Agency, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), IMPEC - LATMOS, Consejo Superior de Investigaciones Científicas [Spain] (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA), Technische Universität Braunschweig [Braunschweig], Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Tognon, Gloria, Ferrari, S., Penasa, L., La Forgia, F., Massironi, M., Naletto, G., Lazzarin, M., Cambianica, P., Lucchetti, A., Pajola, M., Ferri, F., Güttler, C., Davidsson, B., Deshapriya, P., Fornasier, S., Mottola, S., Tóth, I., Sierks, H., Lamy, P. L., Rodrigo, R., Koschny, D., Barbieri, C., Barucci, M. A., Bertaux, J. -L., Bertini, I., Bodewits, D., Cremonese, G., Da Deppo, V., Debei, S., De Cecco, M., Deller, J., Franceschi, M., Frattin, E., Fulle, M., Gutiérrez, P. J., Ip, W. -H., Keller, H. U., Lara, L. M., López-Moreno, J. J., Marzari, F., Petropoulou, V., Shi, X., and Tubiana, C.
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Brightness ,010504 meteorology & atmospheric sciences ,Outcrop ,Multispectral image ,Narrow angle ,Astrophysics ,01 natural sciences ,WATER ICE ,NUCLEUS ,individual: 67P/Churyumov-Gerasimenko [Comets] ,Methods: data analysis ,0103 physical sciences ,data analysis [methods] ,medicine ,010303 astronomy & astrophysics ,0105 earth and related environmental sciences ,Comets: individual: 67P/Churyumov-Gerasimenko ,Physics ,Multispectral data ,biology ,general [Comets] ,Astronomy and Astrophysics ,biology.organism_classification ,Lobe ,Comets: general ,medicine.anatomical_structure ,13. Climate action ,Space and Planetary Science ,[SDU]Sciences of the Universe [physics] ,comets: general – comets: individual: 67P/Churyumov-Gerasimenko – methods: data analysis ,Osiris ,Layering ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] - Abstract
Between August 2014 and September 2016, the ESA space mission Rosetta escorted comet 67P/Churyumov-Gerasimenko (67P) during its perihelion passage. The onboard OSIRIS Narrow Angle Camera (NAC) acquired high-resolution multispectral images of the cometary surface. These datasets allowed a characterization of the spectrophotometric variegation of the layering of the large lobe, correlated with the layer structural elevation. Aims. We perform a spectrophotometric characterization of the outcropping stratification of the small lobe of 67P as a function of its structural elevation, and consequently, a spectrophotometric comparison of the layered outcrops of the two lobes. Methods. We selected two sequences of post-perihelion OSIRIS NAC images (similar to 2.4 au outbound to the Sun), from which we built up two multispectral images, framing an extended geological section of the onion-like stratification of the small lobe. Then we classified the consolidated areas of the outcropping and the relative coarse deposits that were identified in the multispectral data with a two-class maximum likelihood method. For this, we defined the classes as a function of the structural elevation of the surface. Results. As a result, we identified a brightness variegation of the surface reflectance that is correlated with the structural elevation. The outer class, which is located at higher elevations, appears darker than the inner class. This fits previously obtained results for the large lobe. The reflectance values of the nucleus of 67P tend to decrease with increasing structural elevation. Conclusions. The observed spectrophotometric variegation can be due to a different texture as well as to a different content of volatiles and refractories. We suggest that the outer outcrops appear darker because they have been exposed longer, and the inner outcrops appear brighter because the surface has been more effectively rejuvenated. We interpret this variegation as the result of an evolutionary process.© ESO 2019, We are grateful to Andrea Longobardo for suggestions and corrections that improved our paper. OSIRIS was built by a consortium of the Max-Planck-Institut fur Sonnensystemforschung, Gottingen, Germany, CISAS - University of Padova, Italy, the Laboratoire d'Astrophysique de Marseille, France, the Instituto de Astrofisica de Andalucia, CSIC, Granada, Spain, the Research and Scientific Support Department of the European Space Agency, Noordwijk, The Netherlands, the Instituto Nacional de Tecnica Aeroespacial, Madrid, Spain, the Universidad Politechnica de Madrid, Spain, the Department of Physics and Astronomy of Uppsala University, Sweden, and the Institut fur Datentechnik und Kommunikationsnetze der Technischen Universitat Braunschweig, Germany. The support of the national funding agencies of Germany (DLR), France (CNES), Italy (ASI), Spain (MEC), Sweden (SNSB), and the ESA Technical Directorate is gratefully acknowledged.
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- 2019
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14. Calibration and Equalisation of Plastic Scintillator Detectors for Antiproton Annihilation Identification Over Positron/Positronium Background
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Ole Røhne, F. Prelz, G. Nebbia, S. Haider, D. Krasnicky, B. Rienaecker, Daniel Comparat, C. Zimmer, G. Testera, P. Yzombard, Claude Amsler, Giovanni Consolati, Germano Bonomi, Sebastiano Mariazzi, Massimo Caccia, V. Toso, Ruggero Caravita, Luca Penasa, A. Hinterberger, Fabrizio Castelli, Michael Doser, T. Wolz, V. Matveev, Roberto S. Brusa, Marco Giammarchi, Giovanni Cerchiari, V. Petracek, L. Di Noto, L. T. Glöggler, Rafael Ferragut, Alban Kellerbauer, Chloé Malbrunot, V. Lagomarsino, A. Demetrio, Alberto Rotondi, Davide Pagano, Heidi Sandaker, Sebastian Gerber, F. Guatieri, A. Camper, M. Oberthaler, Angela Gligorova, Patrick Nedelec, M. Fanì, E. Oswald, Romualdo Santoro, Marco Prevedelli, M. Antonello, I. C. Tietje, A. S. Belov, O. Khalidova, S. Müller, Nicola Zurlo, Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Zurlo N., Amsler C., Antonello M., Belov A., Bonomi G., Brusa R.S., Caccia M., Camper A., Caravita R., Castelli F., Cerchiari G., Comparat D., Consolati G., Demetrio A., Di Noto L., Doser M., Fani M., Ferragut R., Gerber S., Giammarchi M., Gligorova A., Gloggler L., Guatieri F., Haider S., Hinterberger A., Kellerbauer A., Khalidova O., Krasnicky D., Lagomarsino V., Malbrunot C., Mariazzi S., Matveev V., Muller S.R., Nebbia G., Nedelec P., Oberthaler M., Oswald E., Pagano D., Penasa L., Petracek V., Prelz F., Prevedelli M., Rienaecker B., Rohne O.M., Rotondi A., Sandaker H., Santoro R., Testera G., Tietje I.C., Toso V., Wolz T., Yzombard P., and Zimmer C.
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Physics::Instrumentation and Detectors ,positronium: annihilation ,General Physics and Astronomy ,positron: annihilation ,scintillation counter: plastics ,Scintillator ,01 natural sciences ,Positronium ,Nuclear physics ,Positron ,Positronium, Particle detectors ,0103 physical sciences ,Calibration ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Detectors and Experimental Techniques ,010306 general physics ,Physics ,Annihilation ,photomultiplier ,010308 nuclear & particles physics ,background ,Detector ,calibration ,Identification (information) ,Antiproton ,cosmic radiation ,Scintillators ,numerical calculations: Monte Carlo - Abstract
International audience; In this contribution, the system of the external plastic scintillator slabs of the AEgIS experiment is presented. These slabs, surrounding the superconducting magnet and operating at room temperature, are read out by photomultiplier tubes (PMTs) that are calibrated and equalised to be exploited as a whole detector with useful segmentation and redundancy to effectively detect single antiparticle annihilations. In particular, thanks to periodically recurring calibrations with cosmic rays and to a detailed study of the system in different operational conditions, including extensive Monte Carlo (MC) simulations, these scintillators can be used to identify antiproton annihilations over the constant background represented by cosmic rays and over the strongly time-dependent background due to positrons/positronium annihilations. By means of the sampling and digitization of the analog signal produced by each phototube and the consequent analysis of the amplitude of the recorded events, the energy released by the particle in the scintillator slab can be estimated consistently and with good accuracy. As a consequence, we are able to identify an amplitude range where positrons/positronium annihilations can be univocally excluded. This prerequisite allows us to exploit the array of external plastic scintillators for antihydrogen annihilations tagging.
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- 2019
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15. Multidisciplinary analysis of the Hapi region located on Comet 67P/Churyumov–Gerasimenko
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Wing-Huen Ip, Philippe Lamy, Carsten Güttler, F. La Forgia, Nilda Oklay, R. Rodrigo, Z. Y. Lin, Dennis Bodewits, Stefano Debei, V. Da Deppo, H. U. Keller, Luca Penasa, Jakob Deller, Maurizio Pajola, Alice Lucchetti, Gabriele Cremonese, Giampiero Naletto, Sonia Fornasier, Detlef Koschny, Marco Fulle, P. J. Gutierrez, M. De Cecco, Holger Sierks, J. J. Lopez Moreno, Francesco Marzari, J.-C. Lee, Matteo Massironi, F. Preusker, Ivano Bertini, Stubbe F. Hviid, Sabrina Ferrari, Imre Tóth, Jessica Agarwal, Pamela Cambianica, Xian Shi, Frank Scholten, Lorenza Giacomini, Jean-Loup Bertaux, M. A. Barucci, Stefano Mottola, Luisa Lara, Björn Davidsson, M. R. El Maarry, Clement Feller, Cecilia Tubiana, Monica Lazzarin, Jean-Baptiste Vincent, INAF - Osservatorio Astronomico di Padova (OAPD), Istituto Nazionale di Astrofisica (INAF), Department of Atmospheric Sciences [Taoyuan City], National Central University [Taiwan] (NCU), Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Centro di Ateneo di Studi e Attività Spaziali 'Giuseppe Colombo' (CISAS), Universita degli Studi di Padova, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Jet Propulsion Laboratory (JPL), NASA-California Institute of Technology (CALTECH), Istituto di Astrofisica e Planetologia Spaziali - INAF (IAPS), Dipartimento di Geoscienze [Padova], Dipartimento di Fisica e Astronomia 'Galileo Galilei', CNR Istituto di Fotonica e Nanotecnologie [Padova] (IFN), Consiglio Nazionale delle Ricerche [Roma] (CNR), Institute of Space Science [Taiwan], Space Science Institute [Macau] (SSI), Macau University of Science and Technology (MUST), IMPEC - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centro de Astrobiologia [Madrid] (CAB), Consejo Superior de Investigaciones Científicas [Spain] (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA), International Space Science Institute [Bern] (ISSI), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA), Space Research Institute of the Russian Academy of Sciences (IKI), Russian Academy of Sciences [Moscow] (RAS), Department of Physics [Auburn], Auburn University (AU), Department of Mechanical Engineering [Padova], Department of Industrial Engineering [Padova], Universita degli Studi di Padova-Universita degli Studi di Padova, University of Trento [Trento], Laboratory for Atmospheric and Space Physics [Boulder] (LASP), University of Colorado [Boulder], INAF - Osservatorio Astronomico di Trieste (OAT), Institut d'Astronomie et d'Astrophysique [Bruxelles] (IAA), Université Libre de Bruxelles [Bruxelles] (ULB), Konkoly Observatory, Research Centre for Astronomy and Earth Sciences [Budapest], Hungarian Academy of Sciences (MTA)-Hungarian Academy of Sciences (MTA), European Space Agency, Swedish National Space Board, Ministerio de Educación y Ciencia (España), Centre National D'Etudes Spatiales (France), Agenzia Spaziale Italiana, German Centre for Air and Space Travel, Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737, Pajola, M. [0000-0002-3144-1277], Penasa, L. [0000-0002-6394-3108], Fornasier, S. [0000-0001-7678-3310], Lucchetti, A. [0000-0001-7413-3058], Vicent, J. B. [0000-0001-6575-3079], Naletto, G. [0000-0003-2007-3138], Barucci, M. A. [0000-0002-1345-0890], Bertaux, J. L. [0000-0003-0333-229X], Deller, J. [0000-0001-8341-007X], Fulle, M. [0000-0001-8435-5287], Güttler, C. [0000-0003-4277-1738], Tubiana, C. [0000-0001-8475-9898], Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), California Institute of Technology (CALTECH)-NASA, PLANETO - LATMOS, Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Université libre de Bruxelles (ULB), Agenzia Spaziale Italiana (ASI), Swedish National Space Agency (SNSA), Deutsches Zentrum für Luft- und Raumfahrt (DLR), and Centre National D'Etudes Spatiales (CNES)
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Asteroiden und Kometen ,statistical [Methods] ,Comet ,individual (67P C-G) [Comets] ,Comets: individual (67P C-G) ,Methods: data analysis ,Methods: statistical ,01 natural sciences ,Methods statistical ,Gravitational potential ,0103 physical sciences ,data analysis [Methods] ,010303 astronomy & astrophysics ,Southern Hemisphere ,Physics ,geography ,geography.geographical_feature_category ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,010308 nuclear & particles physics ,Multidisciplinary analysis ,Planetengeodäsie ,67P/Churyumov–Gerasimenko Comets Rosetta Hapi ,Northern Hemisphere ,Astronomy ,Astronomy and Astrophysics ,methods: data analysis –methods: statistical – comets: individual (67P C-G) ,Space and Planetary Science ,Ridge ,individual: 67P C-G [Comets] ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] - Abstract
By using the Rosetta/OSIRIS-NAC data set taken in 2014 August, we focus on the neck region, called Hapi, located on 67P Churyumov-Gerasimenko's Northern hemisphere. The gravitational potential and slopes of Hapi, coupled with the geological unit identification and the boulder size-frequency distributions, support the interpretation that both taluses and gravitational accumulation deposits observable on Hapi are the result of multiple cliff collapses that occurred at different times. By contrast, the fine-particle deposits observable in the central part of the study area are made of aggregates coming from the Southern hemisphere and deposited during each perihelion passage. Both the consolidated terrains on the western part of Hapi, as well as the centrally aligned ridge made of boulder-like features, suggest that Hapi is in structural continuity with the onion-like structure of the main lobe of 67P. Despite the dusty blanket observable on Hapi, its terrains are characterized by water-ice-rich components that, once repeatedly and rapidly illuminated, sublimate, hence resulting in the strong jet activity observed in 2014 August.© 2019 The Author(s)., The support of the national funding agencies of Germany (DLR), Italy (ASI), France (CNES), Spain (MEC), Sweden (SNSB), and the ESA Technical Directorate is gratefully acknowledged.
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- 2019
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16. A ∼100 μm-resolution position-sensitive detector for slow positronium
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Chloé Malbrunot, Alban Kellerbauer, Giovanni Consolati, Germano Bonomi, Ruggero Caravita, P. Hackstock, T. Wolz, R. S. Brusa, G. Nebbia, Patrick Nedelec, A. Camper, Claude Amsler, V. A. Matveev, Sebastian Gerber, O. Khalidova, F. Guatieri, J. Fesel, A. Hinterberger, A. S. Belov, M. Oberthaler, Luca Penasa, Angela Gligorova, Marco Prevedelli, M. Antonello, M. Fanì, I. C. Tietje, Marco Giammarchi, S. Haider, Sebastiano Mariazzi, Daniel Comparat, B. Rienaecker, Massimo Caccia, E. Oswald, Rafael Ferragut, Davide Pagano, P. Yzombard, Ole Røhne, F. Prelz, G. Testera, Nicola Zurlo, C. Zimmer, P. Lebrun, Fabrizio Castelli, V. Petráček, Michael Doser, J. Robert, Eberhard Widmann, V. Lagomarsino, L. Di Noto, Heidi Sandaker, Alberto Rotondi, S.R. Müller, Romualdo Santoro, Giovanni Cerchiari, D. Krasnický, A. Demetrio, Amsler, C., Antonello, M., Belov, A., Bonomi, G., Brusa, R.S., Caccia, M., Camper, A., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Fanì, M., Ferragut, R., Fesel, J., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Hackstock, P., Haider, S., Hinterberger, A., Kellerbauer, A., Khalidova, O., Krasnický, D., Lagomarsino, V., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Müller, S.R., Nebbia, G., Nedelec, P., Oberthaler, M., Oswald, E., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Røhne, O.M., Rotondi, A., Sandaker, H., Santoro, R., Testera, G., Tietje, I.C., Widmann, E., Wolz, T., Yzombard, P., Zimmer, C., Zurlo, N., Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)
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Physics ,Nuclear and High Energy Physics ,010308 nuclear & particles physics ,Detector ,Photoionization ,Positronium ,01 natural sciences ,Magnetic field ,Imaging ,Positron ,Ionization ,Excited state ,0103 physical sciences ,Physics::Atomic and Molecular Clusters ,Microchannel plate detector ,Positronium, Imaging ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Physics::Atomic Physics ,Atomic physics ,Physics::Chemical Physics ,010306 general physics ,Instrumentation - Abstract
In this work we describe a high-resolution position-sensitive detector for positronium. The detection scheme is based on the photoionization of positronium in a magnetic field and the imaging of the freed positrons with a Microchannel Plate assembly. A spatial resolution of ( 88 ± 5 ) μm on the position of the ionized positronium –in the plane perpendicular to a 1.0 T magnetic field– is obtained. The possibility to apply the detection scheme for monitoring the emission into vacuum of positronium from positron/positronium converters, imaging positronium excited to a selected state and characterizing its spatial distribution is discussed. Ways to further improve the spatial resolution of the method are presented.
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- 2019
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17. The backscattering ratio of comet 67P/Churyumov-Gerasimenko dust coma as seen by OSIRIS onboard Rosetta
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Pamela Cambianica, F. La Forgia, Jean-Loup Bertaux, P. J. Gutierrez, Alice Lucchetti, E. Frattin, Alessandra Rotundi, Detlef Koschny, Pedro Hasselmann, Xian Shi, Wing-Huen Ip, Giovanna Rinaldi, Philippe Lamy, Carsten Güttler, Giampiero Naletto, Stefano Mottola, Monica Lazzarin, Marco Fulle, J. J. Lopez Moreno, Sabrina Ferrari, Nafiseh Masoumzadeh, M. A. Barucci, H. U. Keller, D. Guirado, Imre Toth, V. Petropoulou, Gábor L. Kovács, Holger Sierks, Gabriele Cremonese, M. De Cecco, Cesare Barbieri, L. M. Lara, Björn Davidsson, Jakob Deller, Dennis Bodewits, S. Ivanovsky, Francesca Ferri, Cecilia Tubiana, Luca Penasa, Jessica Agarwal, Stefano Debei, Ivano Bertini, Maurizio Pajola, Olga Muñoz, Francesco Marzari, S. Fornasier, Matteo Massironi, F. Moreno, R. Rodrigo, V. Da Deppo, German Centre for Air and Space Travel, Centre National D'Etudes Spatiales (France), Agenzia Spaziale Italiana, Ministerio de Educación y Ciencia (España), Swedish National Space Agency, European Space Agency, Dipartimento di Fisica e Astronomia 'Galileo Galilei', Universita degli Studi di Padova, INAF - Osservatorio Astronomico di Trieste (OAT), Istituto Nazionale di Astrofisica (INAF), Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Istituto di Astrofisica e Planetologia Spaziali - INAF (IAPS), Dipartimento di Scienze e Tecnologie [Napoli] (DIST), Universita degli studi di Napoli 'Parthenope' [Napoli], INAF - Osservatorio Astronomico di Padova (OAPD), Centro di Ateneo di Studi e Attività Spaziali 'Giuseppe Colombo' (CISAS), Department of Physics [Auburn], Auburn University (AU), Konkoly Observatory, Research Centre for Astronomy and Earth Sciences [Budapest], Hungarian Academy of Sciences (MTA)-Hungarian Academy of Sciences (MTA), Laboratoire d'Astrophysique de Marseille (LAM), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), CNR Istituto di Fotonica e Nanotecnologie [Padova] (IFN), Consiglio Nazionale delle Ricerche [Roma] (CNR), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), International Space Science Institute [Bern] (ISSI), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA), Jet Propulsion Laboratory (JPL), California Institute of Technology (CALTECH)-NASA, Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), CNR Institute for Photonics and Nanotechnologies (IFN), Department of Industrial Engineering [Padova], University of Trento [Trento], Institute of Astronomy [Taiwan] (IANCU), National Central University [Taiwan] (NCU), Space Science Institute [Macau] (SSI), Macau University of Science and Technology (MUST), Institut für Geophysik und Extraterrestrische Physik [Braunschweig] (IGEP), Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig], Dipartimento di Geoscienze [Padova], Fulle, M. [0000-0001-8435-5287], Tubiana, C. [0000-0001-8475-9898], Güttler, C. [0000-0003-4277-1738], Pajola, M. [0000-0002-3144-1277], Rinaldi, G. [0000-0002-2968-0455], Naletto, G. [0000-0003-2007-3138], Barucci, M. A. [0000-0002-1345-0890], Bertaux, J. L. [0000-0003-0333-229X], Deller, J. [0000-0001-8341-007X], Fornasier, S. [0000-0001-7678-3310], Penasa, L. [0000-0002-6394-3108], Consejo Superior de Investigaciones Científicas [Spain] (CSIC), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), IMPEC - LATMOS, Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Consejo Superior de Investigaciones Científicas [Spain] (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA), NASA-California Institute of Technology (CALTECH), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Technische Universität Braunschweig [Braunschweig], Università degli Studi di Padova = University of Padua (Unipd), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), Università degli Studi di Napoli 'Parthenope' = University of Naples (PARTHENOPE), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Agence Spatiale Européenne = European Space Agency (ESA), and Unidad de Excelencia Científica María de Maeztu Centro de Astrobiología del Instituto Nacional de Técnica Aeroespacial y CSIC, MDM-2017-0737
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67P/Churyumov-Gerasimenko ,Asteroiden und Kometen ,010504 meteorology & atmospheric sciences ,photometry ,Comet ,data analysis ,scattering –methods: data analysis – techniques: image processing – techniques: photometric – comets: individual: 67P/Churyumov-Gerasimenko ,techniques: image processing ,Astrophysics ,01 natural sciences ,Photometry (optics) ,Scattering ,techniques: photometric ,individual: 67P/Churyumov-Gerasimenko [Comets] ,0103 physical sciences ,Churyumov–Gerasimenko ,image processing [Techniques] ,data analysis [Methods] ,010303 astronomy & astrophysics ,0105 earth and related environmental sciences ,Physics ,biology ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,scattering, methods: data analysis, techniques: image processing, techniques: photometric, comets: individual: 67P/Churyumov-Gerasimenko ,Phase angle ,scattering ,photometric [Techniques] ,comets: individual: 67P/Churyumov-Gerasimenko ,Astronomy and Astrophysics ,biology.organism_classification ,methods: data analysis ,image processing ,13. Climate action ,Space and Planetary Science ,Drag ,Temporal resolution ,Inverse scattering problem ,Osiris ,individual: 67P [Comets] ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] - Abstract
Remote sensing observations of dust particles ejected from comets provide important hints on the intimate nature of the materials composing these primitive objects. The measurement of dust coma backscattering ratio, BSR, defined as the ratio of the reflectance at phase angle 0 ◦ and 30 ◦ , helps tuning theoretical models aimed at solving the inverse scattering problem deriving information on the nature of the ejected particles. The Rosetta/OSIRIS camera sampled the coma phase function of comet 67P, with four series acquired at low phase angles from 2015 January to 2016 May. We also added previously published data to our analysis to increase the temporal resolution of our findings. We measured a BSR in the range ∼ [1.7-3.6], broader than the range found in literature from ground-based observations of other comets. We found that during the post-perihelion phase, the BSR is systematically larger than the classical cometary dust values only for nucleocentric distances smaller than ∼ 100 km. We explain this trend in terms of a cloud of chunks orbiting the nucleus at distances < 100 km ejected during perihelion and slowly collapsing on the nucleus over a few months because of the coma gas drag. This also implies that the threshold particle size for the dust phase function to become similar to the nucleus phase function is between 2.5 mm and 0.1 m, taking into account previous Rosetta findings. © 2018 The Author(s)., The support of the national funding agencies of Germany (DLR: Deutschen Zentrums fur Luft-und Raumfahrt), France (CNES: Centre national d' etudes spatiales), Italy (ASI: Agenzia Spaziale Italiana), Spain (MEC: Ministry of Education& Science), Sweden (SNSB: Swedish National Space Board), and the European Space Agency (ESA) Technical Directorate is gratefully acknowledged.
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- 2019
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18. Production of long-lived positronium states via laser excitation to 33P level
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A. Camper, Sebastian Gerber, J. Fesel, R. S. Brusa, F. Guatieri, P. Lansonneur, Romualdo Santoro, M. Oberthaler, G. Testera, Angela Gligorova, E. Widmann, O. M. Roehne, S. R. Mueller, Luca Penasa, B. Rienaecker, Stefano Aghion, Ph. Lebrun, H. Holmestad, F. Prelz, L. Di Noto, Claude Amsler, Felice Sorrentino, D. Krasnicky, Marco Prevedelli, M. Antonello, Daniel Comparat, Chloé Malbrunot, Rafael Ferragut, J. Robert, Andrea Fontana, I. C. Tietje, Massimo Caccia, Fabrizio Castelli, Michael Doser, V. Petráček, P. Hackstock, Marco Giammarchi, G. Nebbia, Giovanni Cerchiari, S. Haider, Davide Pagano, C. Zimmer, V. Matveev, O. Khalidova, Alban Kellerbauer, Alberto Rotondi, A. Hinterberger, V. Lagomarsino, A. S. Belov, Lillian Smestad, A. Demetrio, Patrick Nedelec, Sebastiano Mariazzi, M. Fanì, C. Evans, Ruggero Caravita, Giovanni Consolati, Germano Bonomi, P. Yzombard, Heidi Sandaker, Nicola Zurlo, Mariazzi S., Caravita R., Aghion S., Amsler C., Antonello M., Belov A., Bonomi G., Brusa R.S., Caccia M., Camper A., Castelli F., Cerchiari G., Comparat D., Consolati G., Demetrio A., Di Noto L., Doser M., Evans C., Fani M., Ferragut R., Fesel J., Fontana A., Gerber S., Giammarchi M., Gligorova A., Guatieri F., Hackstock P., Haider S., Hinterberger A., Holmestad H., Kellerbauer A., Khalidova O., Krasnicky D., Lagomarsino V., Lansonneur P., Lebrun P., Malbrunot C., Matveev V., Mueller S.R., Nebbia G., Nedelec P., Oberthaler M., Pagano D., Penasa L., Petracek V., Prelz F., Prevedelli M., Rienaecker B., Robert J., Roehne O.M., Rotondi A., Sandaker H., Santoro R., Smestad L., Sorrentino F., Testera G., Tietje I.C., Widmann E., Yzombard P., Zimmer C., and Zurlo N.
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positronium, spectroscopy ,Physics ,Laser ,01 natural sciences ,010305 fluids & plasmas ,Positronium ,law.invention ,Interferometry ,symbols.namesake ,law ,Metastability ,0103 physical sciences ,Rydberg formula ,symbols ,Intermediate state ,Atomic physics ,010306 general physics ,Ground state ,Excitation - Abstract
The 33P state of positronium is an intermediate level suitable for producing long-lived positronium states. On one hand, it can be used in a two-step laser excitation scheme from the ground state to Rydberg levels. On the other hand, excitation of positronium to 33P level is a simple pathway for producing metastable 23S positronium atoms by spontaneous radiactive decay. In this work, experiments showing the production of such long-lived levels, using the 33P state as intermediate state, are presented. The characteristics of the two long-lived levels, in view of experiments of deflectometry/interferometry with positronium, are discussed.The 33P state of positronium is an intermediate level suitable for producing long-lived positronium states. On one hand, it can be used in a two-step laser excitation scheme from the ground state to Rydberg levels. On the other hand, excitation of positronium to 33P level is a simple pathway for producing metastable 23S positronium atoms by spontaneous radiactive decay. In this work, experiments showing the production of such long-lived levels, using the 33P state as intermediate state, are presented. The characteristics of the two long-lived levels, in view of experiments of deflectometry/interferometry with positronium, are discussed.
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- 2019
19. Antiproton tagging and vertex fitting in a Timepix3 detector
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Johann Zmeskal, L. Di Noto, Sebastian Gerber, P. Lansonneur, D. Pagano, V. Petracek, V. N. Matveev, F. Guatieri, C. Malbrunot, O. Khalidova, Ruggero Caravita, A. Rotondi, H. Holmestad, A. S. Belov, R. S. Brusa, Daniel Comparat, A. Gligorova, Massimo Caccia, A. Kellerbauer, Giovanni Cerchiari, Marco Prevedelli, M. Antonello, Heidi Sandaker, I. C. Tietje, F. Sorrentino, G. Bonomi, A. Camper, G. Testera, Claude Amsler, P. Nedelec, M. Doser, Fabrizio Castelli, Ph. Hackstock, F. Prelz, A. Hinterberger, Marco Giammarchi, S. Haider, S.R. Müller, J. Robert, A. Demetrio, L. Smestad, C. Evans, S. Aghion, N. Zurlo, G. Nebbia, Luca Penasa, P. Yzombard, A. Fontana, C. Zimmer, M. Fanì, Romualdo Santoro, S. Mariazzi, J. Fesel, J. Marton, P. Lebrun, V. Lagomarsino, Ole Røhne, Giovanni Consolati, D. Krasnický, Markus K. Oberthaler, B. Rienaecker, E. Widmann, Rafael Ferragut, Nicola Pacifico, Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), AEgIS, Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Aghion, S., Amsler, C., Antonello, M., Belov, A., Bonomi, G., Brusa, R.S., Caccia, M., Camper, A., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Noto, L. Di, Doser, M., Evans, C., Fanì, M., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Hackstock, Ph., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Müller, S.R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Røhne, O.M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I.C., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., and Zurlo, N.
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Vertex (graph theory) ,Physics::Instrumentation and Detectors ,01 natural sciences ,Particle identification methods ,Physics::Atomic Physics ,Detectors and Experimental Techniques ,Nuclear Experiment ,Instrumentation ,Image resolution ,Mathematical Physics ,media_common ,Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc) ,Physics ,Detector ,Simulation methods and program ,Hybrid detectors ,Simulation methods and programs ,interac- tion of photons with matter ,interaction of photons with matter ,Detector modelling and simulations I ,interaction of hadrons with matter ,force: gravitation ,readout ,asymmetry ,Particle physics ,Physics::General Physics ,CERN Lab ,media_common.quotation_subject ,antihydrogen: annihilation ,Detector modelling and simulations I (interaction of radiation with matter ,Asymmetry ,anti-p p: annihilation ,Particle identification method ,0103 physical sciences ,detector: pixel ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,010306 general physics ,Antihydrogen ,spatial resolution ,etc) ,antihydrogen ,detector: position sensitive ,010308 nuclear & particles physics ,Hybrid detector ,interaction of radiation with matter ,efficiency ,Antiproton ,High Energy Physics::Experiment - Abstract
International audience; Studies of antimatter are important for understanding our universe at a fundamental level. There are still unsolved problems, such as the matter-antimatter asymmetry in the universe. The AEgIS experiment at CERN aims at measuring the gravitational fall of antihydrogen in order to determine the gravitational force on antimatter. The proposed method will make use of a position-sensitive detector to measure the annihilation point of antihydrogen. Such a detector must be able to tag the antiproton, measure its time of arrival and reconstruct its annihilation point with high precision in the vertical direction. This work explores a new method for tagging antiprotons and reconstructing their annihilation point. Antiprotons from the Antiproton Decelerator at CERN were used to obtain data on direct annihilations on the surface of a silicon pixel sensor with Timepix3 readout. These data were used to develop and verify a detector response model for annihilation of antiprotons in this detector. Using this model and the antiproton data it is shown that a tagging efficiency of 50± 10% and a vertical position resolution of 22 ± 0.5 μm can be obtained.
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- 2018
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20. AEgIS at ELENA: outlook for physics with a pulsed cold antihydrogen beam
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Giovanni Consolati, F. Sorrentino, J. Marton, H. Holmestad, M. Fanì, A. Kellerbauer, F. Prelz, Heidi Sandaker, Ole Røhne, O. Khalidova, Daniel Comparat, Massimo Caccia, G. Nebbia, R. S. Brusa, C. Malbrunot, I. C. Tietje, Marco Prevedelli, N. Zurlo, P. Yzombard, D. Krasnický, P. Nedelec, Z. Mazzotta, V. Petracek, G. Testera, P. Lebrun, J. Fesel, Fabrizio Castelli, L. Di Noto, Johann Zmeskal, G. Bonomi, E. Widmann, Rafael Ferragut, Claude Amsler, D. Pagano, S. Haider, V. Lagomarsino, A. Gligorova, S.R. Müller, Marco Giammarchi, S. Aghion, J. Robert, Romualdo Santoro, S. Mariazzi, Nicola Pacifico, Luca Penasa, A. Demetrio, C. Zimmer, C. Evans, Giovanni Cerchiari, Ruggero Caravita, P. Lansonneur, Markus K. Oberthaler, B. Rienaecker, A. Hinterberger, L. Smestad, A. Fontana, M. Doser, Sebastian Gerber, V. N. Matveev, F. Guatieri, A. Rotondi, Doser, M., Aghion, S., Amsler, C., Bonomi, G., Brusa, R.S., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Evans, C., Fanì, M., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Mazzotta, Z., Müller, S.R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Røhne, O.M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I.C., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., Zurlo, N., Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
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General Physics and Astronomy ,Antiproton ,magnetic field ,Positronium ,01 natural sciences ,010305 fluids & plasmas ,antihydrogen: formation ,antimatter ,Physics::Atomic Physics ,Physics ,antihydrogen, antiprotons, positrons, positronium ,Large Hadron Collider ,atom ,General Engineering ,Articles ,antihydrogen ,antiprotons ,positronium ,positrons ,charge exchange ,pulsed ,anti-p ,Antimatter ,force: gravitation ,gravitation: acceleration ,Rydberg formula ,symbols ,Physics::General Physics ,CERN Lab ,General Mathematics ,interferometer ,Positron ,antihydrogen: beam ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Nuclear physics ,symbols.namesake ,0103 physical sciences ,Physics::Atomic and Molecular Clusters ,positronium: excited state ,010306 general physics ,Antihydrogen ,detector: position sensitive ,gravitation: interaction ,antihydrogen: production ,ground state: hyperfine structure ,Antiproton Decelerator ,Automatic Keywords ,Beam (structure) - Abstract
The efficient production of cold antihydrogen atoms in particle traps at CERN’s Antiproton Decelerator has opened up the possibility of performing direct measurements of the Earth’s gravitational acceleration on purely antimatter bodies. The goal of the AEgIS collaboration is to measure the value of g for antimatter using a pulsed source of cold antihydrogen and a Moiré deflectometer/Talbot–Lau interferometer. The same antihydrogen beam is also very well suited to measuring precisely the ground-state hyperfine splitting of the anti-atom. The antihydrogen formation mechanism chosen by AEgIS is resonant charge exchange between cold antiprotons and Rydberg positronium. A series of technical developments regarding positrons and positronium (Ps formation in a dedicated room-temperature target, spectroscopy of the n =1–3 and n =3–15 transitions in Ps, Ps formation in a target at 10 K inside the 1 T magnetic field of the experiment) as well as antiprotons (high-efficiency trapping of , radial compression to sub-millimetre radii of mixed plasmas in 1 T field, high-efficiency transfer of to the antihydrogen production trap using an in-flight launch and recapture procedure) were successfully implemented. Two further critical steps that are germane mainly to charge exchange formation of antihydrogen—cooling of antiprotons and formation of a beam of antihydrogen—are being addressed in parallel. The coming of ELENA will allow, in the very near future, the number of trappable antiprotons to be increased by more than a factor of 50. For the antihydrogen production scheme chosen by AEgIS, this will be reflected in a corresponding increase of produced antihydrogen atoms, leading to a significant reduction of measurement times and providing a path towards high-precision measurements. This article is part of the Theo Murphy meeting issue ‘Antiproton physics in the ELENA era’.
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- 2018
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21. The big lobe of 67P/Churyumov–Gerasimenko comet: morphological and spectrophotometric evidences of layering as from OSIRIS data
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P. J. Gutierrez, Xian Shi, Carsten Güttler, Pedro Hasselmann, J. J. López-Moreno, Matteo Massironi, Monica Lazzarin, Detlef Koschny, Stubbe F. Hviid, M. A. Barucci, Björn Davidsson, Cecilia Tubiana, Ivano Bertini, Pamela Cambianica, Nicolas Thomas, Michael Küppers, Francesca Ferri, Luca Penasa, Francesco Marzari, M. De Cecco, W-H. Ip, J. L. Bertaux, Marco Franceschi, Laurent Jorda, Holger Sierks, J.-B. Vincent, Olivier Groussin, E. Frattin, F. La Forgia, Stefano Debei, Philippe Lamy, Jakob Deller, Maurizio Pajola, Nilda Oklay, Giampiero Naletto, Ekkehard Kührt, Sonia Fornasier, L. M. Lara, V. Da Deppo, Marco Fulle, Jörg Knollenberg, Emanuele Simioni, Sabrina Ferrari, R. Rodrigo, Gabriele Cremonese, Alice Lucchetti, H. U. Keller, Dennis Bodewits, Centro di Ateneo di Studi e Attività Spaziali 'Giuseppe Colombo' (CISAS), Universita degli Studi di Padova, Dipartimento di Fisica e Astronomia 'Galileo Galilei', CNR Istituto di Fotonica e Nanotecnologie [Padova] (IFN), Consiglio Nazionale delle Ricerche [Roma] (CNR), Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), INAF - Osservatorio Astronomico di Padova (OAPD), Istituto Nazionale di Astrofisica (INAF), DLR Institut für Planetenforschung, Deutsches Zentrum für Luft- und Raumfahrt [Berlin] (DLR), Max-Planck-Institut für Sonnensystemforschung (MPS), Max-Planck-Gesellschaft, Laboratoire d'Astrophysique de Marseille (LAM), Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Aix Marseille Université (AMU)-Centre National d'Études Spatiales [Toulouse] (CNES), PLANETO - LATMOS, Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS), Centro de Astrobiologia [Madrid] (CAB), Instituto Nacional de Técnica Aeroespacial (INTA)-Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Research and Scientific Support Department, ESTEC (RSSD), European Space Research and Technology Centre (ESTEC), European Space Agency (ESA)-European Space Agency (ESA), Jet Propulsion Laboratory (JPL), California Institute of Technology (CALTECH)-NASA, Fundacion Galileo Galilei, Department of Astronomy [College Park], University of Maryland [College Park], University of Maryland System-University of Maryland System, CNR Institute for Photonics and Nanotechnologies (IFN), Department of Industrial Engineering [Padova], Dipartimento di Geoscienze [Padova], INAF - Osservatorio Astronomico di Trieste (OAT), Instituto de Astrofísica de Andalucía (IAA), Consejo Superior de Investigaciones Científicas [Madrid] (CSIC), Institute of Astronomy [Taiwan] (IANCU), National Central University [Taiwan] (NCU), Space Science Institute [Macau] (SSI), Macau University of Science and Technology (MUST), Institut für Geophysik und Extraterrestrische Physik [Braunschweig] (IGEP), Technische Universität Braunschweig = Technical University of Braunschweig [Braunschweig], Operations Department (ESAC), European Space Astronomy Centre (ESAC), Physikalisches Institut [Bern], Universität Bern [Bern], Center for Space and Habitability (CSH), University of Bern, German Centre for Air and Space Travel, Centre National D'Etudes Spatiales (France), Agenzia Spaziale Italiana, Agencia Estatal de Investigación (España), European Space Agency, Swedish National Space Agency, Ferrari, Sabrina, Penasa, L., La Forgia, F., Massironi, M., Naletto, G., Lazzarin, M., Fornasier, S., Hasselmann, P. H., Lucchetti, A., Pajola, M., Ferri, F., Cambianica, Pamela, Oklay, N., Tubiana, C., Sierks, H., Lamy, P. L., Rodrigo, R., Koschny, D., Davidsson, B., Barucci, M. A., Bertaux, J. -L., Bertini, I., Bodewits, D., Cremonese, G., Da Deppo, V., Debei, S., De Cecco, M., Deller, J., Franceschi, M., Frattin, Elisa, Fulle, M., Groussin, O., Gutiérrez, P. J., Güttler, C., Hviid, S. F., Ip, W. -H., Jorda, L., Keller, H. U., Knollenberg, J., Kührt, E., Küppers, M., Lara, L. M., López-Moreno, J. J., Marzari, F., Shi, X., Simioni, E., Thomas, N., Vincent, J. -B., Università degli Studi di Padova = University of Padua (Unipd), National Research Council of Italy | Consiglio Nazionale delle Ricerche (CNR), Max-Planck-Institut für Sonnensystemforschung = Max Planck Institute for Solar System Research (MPS), Aix Marseille Université (AMU)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Agence Spatiale Européenne = European Space Agency (ESA)-Agence Spatiale Européenne = European Space Agency (ESA), NASA-California Institute of Technology (CALTECH), Universität Bern [Bern] (UNIBE), PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), IMPEC - LATMOS, Consejo Superior de Investigaciones Científicas [Spain] (CSIC)-Instituto Nacional de Técnica Aeroespacial (INTA), Consejo Superior de Investigaciones Científicas [Spain] (CSIC), and Technische Universität Braunschweig [Braunschweig]
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67P/Churyumov-Gerasimenko ,Brightness ,Comets: general ,Comets: individual: 67P/Churyumov-Gerasimenko ,Methods: data analysis ,Techniques: image processing ,Astronomy and Astrophysics ,Space and Planetary Science ,010504 meteorology & atmospheric sciences ,Multispectral image ,Comet ,Data analysis ,Mineralogy ,Spatial distribution ,01 natural sciences ,Texture (geology) ,Image processing ,individual: 67P/Churyumov-Gerasimenko [Comets] ,0103 physical sciences ,medicine ,Comets ,image processing [Techniques] ,spectral variegation ,010303 astronomy & astrophysics ,0105 earth and related environmental sciences ,Physics ,[PHYS]Physics [physics] ,biology ,OSIRIS cameras ,[SDU.ASTR]Sciences of the Universe [physics]/Astrophysics [astro-ph] ,520 Astronomy ,general [Comets] ,Astronomy and Astrophysic ,biology.organism_classification ,620 Engineering ,Lobe ,data analysi [Methods] ,medicine.anatomical_structure ,multiple-filters ,Variegation (histology) ,Osiris - Abstract
Between 2014 and 2016, ESA's Rosetta OSIRIS cameras acquired multiple-filters images of the layered nucleus of comet 67P/Churyumov-Gerasimenko, ranging from ultraviolet to near-infrared wavelengths. No correlation between layers disposition and surface spectral variegation has been observed so far. This paper investigates possible spectral differences among decametre-thickness outcropping layers of the biggest lobe of the comet by means of OSIRIS image dataset. A two-classes maximum likelihood classification was applied on consolidated outcrops and relative deposits identified on post-perihelion multispectral images of the big lobe. We distinguished multispectral data on the basis of the structural elevation of the onion-shell Ellipsoidal Model of 67P. The spatial distribution of the two classes displays a clear dependence on the structural elevation, with the innermost class resulting over 50 per cent brighter than the outermost one. Consolidated cometarymaterials located at different structural levels are characterized by different brightness and revealed due to the selective removal of large volumes. This variegation can be attributed to a different texture of the outcrop surface and/or to a different content of refractory materials.© 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society., We are grateful to Paul Helfenstein for corrections that improved our paper. OSIRIS was built by a consortium of the Max-Planck-Institut fur Sonnensystemforschung, in Goottingen, Germany, CISAS-University of Padova, Italy, the Laboratoire d'Astrophysique de Marseille, France, the Instituto de Astrofisica de Andalucia, CSIC, Granada, Spain, the Research and Scientific Support Department of the European Space Agency, Noordwijk, The Netherlands, the Instituto Nacional de Tecnica Aeroespacial, Madrid, Spain, the Universidad Politechnica de Madrid, Spain, the Department of Physics and Astronomy of Uppsala University, Sweden, and the Institut fur Datentechnik und Kommunikationsnetze der Technischen Universitat Braunschweig, Germany. The support of the national funding agencies of Germany (DLR), Italy (ASI), France (CNES), Spain (MEC), Sweden (SNSB), and the ESA Technical Directorate is gratefully acknowledged. We thank the ESA teams at ESAC, ESOC, and ESTEC for their work in support of the Rosetta mission.
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- 2018
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22. Measurement of antiproton annihilation on Cu, Ag and Au with emulsion films
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Ole Røhne, M. Sacerdoti, D. Krasnicky, Marco Prevedelli, Daniel Comparat, I. C. Tietje, Patrick Nedelec, A. Hinterberger, Akitaka Ariga, Johann Zmeskal, V. Lagomarsino, Rafael Ferragut, V. Matveev, Z. Mazzotta, C. Pistillo, Roberto S. Brusa, J. Fesel, P. Bräunig, S. Vamosi, Nicola Pacifico, Alban Kellerbauer, Ruggero Caravita, V. Petracek, L. Ravelli, G. Nebbia, L. Cabaret, Paola Scampoli, Davide Pagano, Giovanni Consolati, Germano Bonomi, T. Huse, F. Prelz, Heidi Sandaker, Massimo Caccia, B. Rienaecker, Claude Amsler, C. Zimmer, Sebastiano Mariazzi, E. Widmann, M. Oberthaler, Angela Gligorova, Michal Simon, Sebastian Gerber, Jiro Kawada, S. Müller, Alberto Rotondi, L. Di Noto, Adriano Fontana, Chloé Malbrunot, F. Guatieri, M. Vladymyrov, P. Yzombard, P. Lansonneur, Ph. Lebrun, H. Holmestad, S. Haider, Tomoko Ariga, Stefano Aghion, Antonio Ereditato, Marco Giammarchi, Lillian Smestad, Felice Sorrentino, G. Testera, Fabrizio Castelli, Michael Doser, Giovanni Cerchiari, M. Kimura, A. Demetrio, C. Evans, Nicola Zurlo, Luca Penasa, Romualdo Santoro, Aghion, S., Amsler, C., Ariga, A., Ariga, T., Bonomi, G., Bräunig, P., Brusa, R.S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Noto, L. Di, Doser, M., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Hinterberger, A., Holmestad, H., Huse, T., Kawada, J., Kellerbauer, A., Kimura, M., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Müller, S.R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Rienaecker, B., Røhne, O.M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Simon, M., Smestad, L., Sorrentino, F., Testera, G., Tietje, I.C., Vamosi, S., Vladymyrov, M., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., Zurlo, N., Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Brusa, R. S., Müller, S. R., Røhne, O. M., Scampoli, Paola, and Tietje, I. C.
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Particle physics ,Physics - Instrumentation and Detectors ,530 Physics ,Monte Carlo method ,Detector modelling and simulations I (interaction of radiation with matter ,FOS: Physical sciences ,interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, Particle tracking detectors ,01 natural sciences ,High Energy Physics - Experiment ,High Energy Physics - Experiment (hep-ex) ,emulsion detectors ,0103 physical sciences ,antimatter ,free fall ,Detector modelling and simulations I (interaction of radiation with matter, interaction of photons with matter, interaction of hadrons with matter, etc) ,Particle tracking detectors (Solidstate detectors) ,Instrumentation ,Mathematical Physics ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Detectors and Experimental Techniques ,010306 general physics ,Nuclear Experiment ,Particle tracking detectors (Solid- state detectors) ,physics.ins-det ,detectors ,antiproton annihilation ,etc) ,antihydrogen ,Physics ,Large Hadron Collider ,Annihilation ,010308 nuclear & particles physics ,hep-ex ,emulsion detectors, antiproton annihilation, antimatter, free fall ,antimatter, antihydrogen, detectors, antiprotons ,interaction of photons with matter ,Instrumentation and Detectors (physics.ins-det) ,Hadronization ,Antiproton Decelerator ,interaction of hadrons with matter ,Beamline ,Antiproton ,Particle ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,antiprotons ,Particle Physics - Experiment - Abstract
The characteristics of low energy antiproton annihilations on nuclei (e.g. hadronization and product multiplicities) are not well known, and Monte Carlo simulation packages that use different models provide different descriptions of the annihilation events. In this study, we measured the particle multiplicities resulting from antiproton annihilations on nuclei. The results were compared with predictions obtained using different models in the simulation tools GEANT4 and FLUKA. For this study, we exposed thin targets (Cu, Ag and Au) to a very low energy antiproton beam from CERN's Antiproton Decelerator, exploiting the secondary beamline available in the AEgIS experimental zone. The antiproton annihilation products were detected using emulsion films developed at the Laboratory of High Energy Physics in Bern, where they were analysed at the automatic microscope facility. The fragment multiplicity measured in this study is in good agreement with results obtained with FLUKA simulations for both minimally and heavily ionizing particles. The characteristics of low energy antiproton annihilations on nuclei (e.g. hadronization and product multiplicities) are not well known, and Monte Carlo simulation packages that use different models provide different descriptions of the annihilation events. In this study, we measured the particle multiplicities resulting from antiproton annihilations on nuclei. The results were compared with predictions obtained using different models in the simulation tools GEANT4 and FLUKA. For this study, we exposed thin targets (Cu, Ag and Au) to a very low energy antiproton beam from CERN's Antiproton Decelerator, exploiting the secondary beamline available in the AEgIS experimental zone. The antiproton annihilation products were detected using emulsion films developed at the Laboratory of High Energy Physics in Bern, where they were analysed at the automatic microscope facility. The fragment multiplicity measured in this study is in good agreement with results obtained with FLUKA simulations for both minimally and heavily ionizing particles.
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- 2017
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23. The AEgIS experiment at CERN: Measuring antihydrogen free-fall in earth's gravitational field to test WEP with antimatter
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Daniel Comparat, P. Lebrun, Heidi Sandaker, L. Ravelli, Davide Pagano, Alberto Rotondi, G. Testera, S. Haider, Tomoko Ariga, Antonio Ereditato, F. Prelz, Rafael Ferragut, Fabrizio Castelli, Michael Doser, Sebastian Gerber, Paola Scampoli, F. Guatieri, Claude Amsler, H. Holmestad, P. Lansonneur, Felice Sorrentino, Giovanni Consolati, Germano Bonomi, M. Oberthaler, M. Sacerdoti, Angela Gligorova, Marco Prevedelli, P. Yzombard, I. C. Tietje, Nicola Zurlo, L. Cabaret, Patrick Nedelec, Johann Zmeskal, T. Huse, G. Nebbia, Adriano Fontana, Sebastiano Mariazzi, B. Rienaecker, N. Pacifico, Luca Penasa, Roberto S. Brusa, S. Vamosi, V. Petracek, C. Pistillo, Ruggero Caravita, Marco Giammarchi, Z. Mazzotta, Alban Kellerbauer, V. A. Matveev, Eberhard Widmann, V. Lagomarsino, L. Di Noto, Massimo Caccia, I. M. Strojek, Ole Røhne, Giovanni Cerchiari, P. Bräunig, D. Krasnický, A. Demetrio, C. Evans, J. Fesel, Chloé Malbrunot, L. Smestad, Romualdo Santoro, Brusa, R. S, Amsler, C, Ariga, T, Bonomi, G, Bräunig, P, Cabaret, L, Caccia, M, Caravita, R, Castelli, F, Cerchiari, G, Comparat, D, Consolati, G, Demetrio, A., Di Noto, L, Doser, M, Ereditato, A, Evans, C, Ferragut, R, Fesel, J, Fontana, A, Gerber, S, Giammarchi, M, Gligorova, A, Guatieri, F, Haider, S, Holmestad, H, Huse, T, Kellerbauer, A, Krasnický, D, Lagomarsino, V, Lansonneur, P, Lebrun, P, Malbrunot, C, Mariazzi, S, Matveev, V, Mazzotta, Z, Nebbia, G, Nedelec, P, Oberthaler, M, Pacifico, N, Pagano, D, Penasa, L, Petracek, V, Pistillo, C, Prelz, F, Prevedelli, M, Ravelli, L, Rienaecker, B, Røhne, O. M, Rotondi, A, Sacerdoti, M, Sandaker, H, Santoro, R, Scampoli, Paola, Smestad, L, Sorrentino, F, Strojek, I. M, Testera, G, Tietje, I. C, Vamosi, S, Widmann, E, Yzombard, P, Zmeskal, J, Zurlo, N., Brusa, R S, Røhne, O M, Scampoli, P, Strojek, I M, Tietje, I C, Zurlo, N, Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan)
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History ,Physics::General Physics ,CERN Lab ,530 Physics ,deflection ,[PHYS.PHYS.PHYS-ACC-PH]Physics [physics]/Physics [physics]/Accelerator Physics [physics.acc-ph] ,antihydrogen: beam ,7. Clean energy ,01 natural sciences ,Education ,Nuclear physics ,Physics and Astronomy (all) ,Gravitational field ,positron: capture ,anti-p: capture ,0103 physical sciences ,excited state ,antimatter ,Physics::Atomic Physics ,Equivalence principle ,010306 general physics ,Antihydrogen ,Physics ,Large Hadron Collider ,010308 nuclear & particles physics ,charge exchange ,Computer Science Applications ,Antiproton Decelerator ,Deflection (physics) ,equivalence principle ,Antiproton ,gravitation ,Antimatter ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,gravity, antihydrogen - Abstract
International audience; The AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) experiment is designed with the objective to test the weak equivalence principle with antimatter by studying the free fall of antihydrogen in the Earth’s gravitational field. A pulsed cold beam of antihydrogen will be produced by charge exchange between cold Ps excited in Rydberg state and cold antiprotons. Finally the free fall will be measured by a classical moiré deflectometer. The apparatus being assembled at the Antiproton Decelerator at CERN will be described, then the advancements of the experiment will be reported: positrons and antiprotons trapping measurements, Ps two-step excitation and a test-measurement of antiprotons deflection with a small scale moiré deflectometer.
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24. Characterization of a transmission positron/positronium converter for antihydrogen production
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Victor Matveev, Paola Scampoli, Tomoko Ariga, Ulrik I. Uggerhøj, S. Haider, Claude Amsler, S.R. Müller, G. Nebbia, J. Fesel, Ole Røhne, B. Rienäcker, Roberto S. Brusa, Z. Mazzotta, G. Testera, Eberhard Widmann, Rafael Ferragut, V. Petracek, Giovanni Cerchiari, Felice Sorrentino, Romualdo Santoro, V. Lagomarsino, Alban Kellerbauer, L. Resch, S.L. Andersen, N. Pacifico, Luca Penasa, F. Lyckegaard, F. Prelz, Fabrizio Castelli, Stefano Aghion, J. Robert, D. Krasnický, A. Demetrio, Sebastiano Mariazzi, C. Evans, L. Ravelli, L. Di Noto, Michael Doser, Ruggero Caravita, Davide Pagano, P. Lebrun, C. Zimmer, Giovanni Consolati, Jacques Chevallier, Germano Bonomi, P. Lansonneur, Massimo Caccia, Sebastian Gerber, Marco Giammarchi, Daniel Comparat, Heidi Sandaker, Antonio Ereditato, M. Sacerdoti, M. C. Simon, F. Guatieri, Nicola Zurlo, Marco Prevedelli, H. Holmestad, L. Povolo, Chloé Malbrunot, I. C. Tietje, Adriano Fontana, Alberto Rotondi, A. Hinterberger, L. Smestad, Patrick Nedelec, Johann Zmeskal, M. Oberthaler, Angela Gligorova, P. Yzombard, Université Paris-Sud - Paris 11 (UP11), Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Aghion, S., Amsler, C., Ariga, T., Bonomi, G., Brusa, R.S., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Müller, S.R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Povolo, L., Prelz, F., Prevedelli, M., Ravelli, L., Resch, L., Rienäcker, B., Robert, J., Røhne, O.M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Simon, M., Smestad, L., Sorrentino, F., Testera, G., Tietje, I.C., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., Zurlo, N., Andersen, S.L., Chevallier, J., Uggerhøj, U.I., Lyckegaard, F., Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Brusa, R. S., Müller, S. R., Røhne, O. M., Scampoli, Paola, Tietje, I. C., Andersen, S. L., and Uggerhøj, U. I.
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Photomultiplier ,COLLISIONS ,Positronium, Transmission, Antihydrogen ,Nuclear and High Energy Physics ,GRAPHITE ,Astrophysics::High Energy Astrophysical Phenomena ,BEAM ,[PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] ,Kinetic energy ,Positronium ,01 natural sciences ,Secondary electrons ,010305 fluids & plasmas ,SECONDARY-ELECTRON EMISSION ,Positron ,POSITRON-ANNIHILATION ,THIN-FILMS ,0103 physical sciences ,Transmission ,Antihydrogen ,mesa-structured silica ,010306 general physics ,COLD ,Instrumentation ,Physics ,PLASMA ,Scattering ,SURFACES ,positronium, mesa-structured silica ,TRANSPORT ,Time of flight ,Physics::Accelerator Physics ,Atomic physics - Abstract
In this work a characterization study of forward emission from a thin, meso-structured silica Received 17 March 2017 positron/positronium (Ps) converter following implantation of positrons in light of possible antihydrogen production is presented. The target consisted of a similar to 1 mu m thick ultraporous silica film e-gun evaporated onto a 20 nm carbon foil. The Ps formation and emission was studied via Single Shot Positron Annihilation Lifetime Spectroscopy measurements after implantation of pulses with 3 4.10(7) positrons and 10 ns temporal width. The forward emission of implanted positrons and secondary electrons was investigated with a micro-channel plate phosphor screen assembly, connected either to a CCD camera for imaging of the impinging particles, or to a fast photomultiplier tube to extract information about their time of flight. The maximum Ps formation fraction was estimated to be similar to 10%. At least 10% of the positrons implanted with an energy of 3.3 keV are forward-emitted with a scattering angle smaller than 50 and maximum kinetic energy of 1.2 keV. At least 0.1-0.2 secondary electrons per implanted positron were also found to be forward-emitted with a kinetic energy of a few eV. The possible application of this kind of positron/positronium converter for antihydrogen production is discussed. (C) 2017 Elsevier B.V. All rights reserved.
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25. Overview of Recent Work on Laser Excitation of Positronium for the Formation of Antihydrogen
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J. Fesel, P. Yzombard, Z. Mazzotta, Giovanni Cerchiari, Alban Kellerbauer, Romualdo Santoro, G. Nebbia, Matveev, P. Bräunig, Alberto Rotondi, Andrea Fontana, Antonio Ereditato, Lagomarsino, Sebastiano Mariazzi, Giovanni Consolati, Germano Bonomi, Ole Røhne, L. Ravelli, Ph. Lebrun, H. Holmestad, Massimo Caccia, M. Sacerdoti, Lillian Smestad, D. Krasnický, A. Demetrio, L. Cabaret, Marco Prevedelli, Davide Pagano, Marco Giammarchi, C. Evans, Heidi Sandaker, Felice Sorrentino, I. C. Tietje, T. Huse, M. Oberthaler, I. M. Strojek, G. Testera, Angela Gligorova, S. Haider, Petracek, L. Di Noto, Patrick Nedelec, Nicola Zurlo, Fabrizio Castelli, Johann Zmeskal, Tomoko Ariga, Michael Doser, Rafael Ferragut, S. Vamosi, Paola Scampoli, Claude Amsler, Luca Penasa, Nicola Pacifico, Chloé Malbrunot, Sebastian Gerber, F. Guatieri, P. Lansonneur, Daniel Comparat, F. Prelz, B. Rienaecker, C. Pistillo, Ruggero Caravita, R. S. Brusa, E. Widmann, Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Yasuyuki Matsuda, Yzombard, P., Amsler, C., Ariga, T., Bonomi, G., Bräunig, P., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Kellerbauer, A., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, Marco, Ravelli, L., Rienaecker, B., Røne, O. M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Smestad, L., Sorrentino, F., Strojek, I. M., Testera, G., Tietje, I. C., Vamosi, S., Widmann, E., Zmeskal, J., Zurlo, N., Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)
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Work (thermodynamics) ,CERN Lab ,antihydrogen: beam ,Positronium laser cooling ,Positronium ,7. Clean energy ,01 natural sciences ,010305 fluids & plasmas ,law.invention ,laser excitation ,Nuclear physics ,antihydrogen: formation ,Physics in General ,law ,0103 physical sciences ,Physics::Atomic and Molecular Clusters ,Positronium laser excitation ,Physics::Atomic Physics ,anti-matter, laser excitation ,positronium: excited state ,010306 general physics ,Antihydrogen ,Physics ,Positronium, Antihydrogen, Laser-matter interaction, Positronium laser excitation, Positronium laser cooling, anions laser cooling ,Condensed Matter::Quantum Gases ,anions laser cooling ,atom ,antihydrogen: production ,Laser ,charge exchange ,[PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph] ,anti-p ,laser ,Laser-matter interaction ,anti-matter ,gravitation ,Physics::Accelerator Physics ,Excitation - Abstract
International audience; The AEgIS experiment carried out at CERN aims to form a cold antihydrogen beam to perform precision studies on gravity. A key ingredient is the creation of antihydrogen via a charge-exchange process between trapped antiprotons and Rydberg excited positronium atoms (Ps). In the present, the latest results of laser excitation of Ps are reviewed, as well as studies on a possible laser manipulation and cooling of Ps and antiprotons.
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26. Advances in PS manipulations and laser studies in the AEgIS experiment
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S. Haider, Johann Marton, Ruggero Caravita, Davide Pagano, S. Müller, J. Robert, G. Nebbia, Nicola Pacifico, Markus K. Oberthaler, J. Fesel, Rafael Ferragut, D. Krasnický, R. S. Brusa, L. Ravelli, Massimo Caccia, Giovanni Consolati, A. Demetrio, C. Zimmer, Patrick Nedelec, Johann Zmeskal, C. Evans, Sebastiano Mariazzi, Felice Sorrentino, B. Rienäcker, V. Petráček, F. Prelz, Marco Giammarchi, L. Di Noto, Giovanni Cerchiari, Heidi Sandaker, E. Widmann, Stefano Aghion, Andrea Fontana, Sebastian Gerber, V. Lagomarsino, A. Hinterberger, V. Matveev, Chloé Malbrunot, Angela Gligorova, Ole Røhne, F. Guatieri, O. Khalidova, Daniel Comparat, P. Lansonneur, Marco Prevedelli, I. C. Tietje, Alberto Rotondi, G. Testera, Lillian Smestad, Luca Penasa, Fabrizio Castelli, Michael Doser, Ph. Lebrun, H. Holmestad, P. Yzombard, Z. Mazzotta, Alban Kellerbauer, Germano Bonomi, Nicola Zurlo, Claude Amsler, Romualdo Santoro, Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Caravita, R., Aghion, S., Amsler, C., Bonomi, G., Brusa, R. S., Caccia, M., Castelli, F., Cerchiari, G., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnickã½, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Mazzottae, Z., Mã¼ller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, Marco, Ravelli, L., Rienã¤cker, B., Robert, J., Rã¸hne, O. M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., and Zurlo, N.
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Physics ,Antimatter ,010308 nuclear & particles physics ,Physics and Astronomy ,Positronium formation ,020209 energy ,General Physics and Astronomy ,Nanotechnology ,02 engineering and technology ,Laser ,01 natural sciences ,law.invention ,Physics and Astronomy (all) ,Antimatter, Gravity ,law ,0103 physical sciences ,0202 electrical engineering, electronic engineering, information engineering ,Physics::Atomic Physics ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Detectors and Experimental Techniques - Abstract
International audience; Positronium (Ps), the unstable bound state of electron and positron, is a valuable system for neutral antimatter spectroscopic studies and for antihydrogen production. Forming a pulsed beam cold antihydrogen using charge-exchange with the Rydberg Ps is the goal of the AEgIS Collaboration, which aims to measure gravity on neutral antimatter. Recent results achieved in producing, manipulating and studying Ps are summarized. Ps has been first produced with mesoporous silica targets in a reflection geometry. Spectroscopy of Ps n = 3 state has been conducted, yielding as a byproduct an independent estimate of the produced Ps temperature. Efficient laser excitation to the Rydberg levels was then achieved, validating the proof-of-concept of AEgIS. Subsequently, production of Ps from a new class of transmission targets was also achieved, opening the possibility for future experiments.
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27. Positronium for Antihydrogen Production in the AEGIS Experiment
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Heidi Sandaker, G. Nebbia, Eberhard Widmann, V. Lagomarsino, Sebastian Gerber, Z. Mazzotta, S.R. Müller, Markus K. Oberthaler, Romualdo Santoro, M. Fanì, F. Guatieri, B. Rienaecker, Alban Kellerbauer, P. Yzombard, Alberto Rotondi, Sebastiano Mariazzi, L. Di Noto, A. Hinterberger, Ole Røhne, A. Demetrio, Claude Amsler, Daniel Comparat, Giovanni Consolati, C. Evans, L. Smestad, Germano Bonomi, Massimo Caccia, Johann Marton, Nicola Zurlo, Rafael Ferragut, Andrea Fontana, V. Petráček, Nicola Pacifico, C. Malbrunot, Ruggero Caravita, O. Khalidova, D. Krasnicky, Felice Sorrentino, V. A. Matveev, Marco Giammarchi, P. Lansonneur, F. Prelz, Stefano Aghion, R. S. Brusa, J. Fesel, Patrick Nedelec, Johann Zmeskal, Giovanni Cerchiari, Luca Penasa, Marco Prevedelli, H. Holmestad, I. C. Tietje, S. Haider, G. Testera, Fabrizio Castelli, Michael Doser, Angela Gligorova, P. Lebrun, J. Robert, L. Ravelli, Davide Pagano, C. Zimmer, Laboratoire Aimé Cotton (LAC), École normale supérieure - Cachan (ENS Cachan)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Consolati, G., Aghion, S., Amsler, C., Bonomi, G., Brusa, R. S., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Comparat, D., Demetrio, A., Di Noto, L., Doser, M., Evans, C., Fanì, M., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Hinterberger, A., Holmestad, H., Kellerbauer, A., Khalidova, O., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Mazzotta, Z., Müller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Ravelli, L., Rienaecker, B., Robert, J., Røhne, O. M., Rotondi, A., Sandaker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I. C., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., and Zurlo, N.
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Physics::General Physics ,experimental methods ,CERN Lab ,talk: Lublin 2017/08/28 ,General Physics and Astronomy ,anti-p: acceleration ,Gravitational acceleration ,7. Clean energy ,01 natural sciences ,anti-p p: annihilation ,Nuclear physics ,symbols.namesake ,Physics and Astronomy (all) ,0103 physical sciences ,antimatter ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Physics::Atomic Physics ,positronium: excited state ,anti-p: beam ,010306 general physics ,Antihydrogen ,Physics ,010308 nuclear & particles physics ,antihydrogen: production ,Antiproton Decelerator ,positronium: target ,Antiproton ,Antimatter ,Excited state ,gravitation: acceleration ,Rydberg formula ,symbols ,proposed experiment ,Rydberg state ,gravity, antimatter ,Particle Physics - Experiment - Abstract
International audience; The primary goal of the Antihydrogen Experiment: Gravity, Interferometry, Spectroscopy (AEGIS) collaboration is to measure for the first time precisely the gravitational acceleration of antihydrogen, H¯ , a fundamental issue of contemporary physics, using a beam of antiatoms. Indeed, although indirect arguments have been raised against a different acceleration of antimatter with respect to matter, nevertheless some attempts to formulate quantum theories of gravity, or to unify gravity with the other forces, consider the possibility of a non-identical gravitational interaction between matter and antimatter. We plan to generate H¯ through a charge-exchange reaction between excited Ps and antiprotons coming from the Antiproton Decelerator facility at CERN. It offers the advantage to produce sufficiently cold antihydrogen to make feasible a measurement of gravitational acceleration with reasonable uncertainty (of the order of a few percent). Since the cross-section of the above reaction increases with n 4 , n being the principal quantum number of Ps, it is essential to generate Ps in a highly excited (Rydberg) state. This will occur by means of two laser excitations of Ps emitted from a nanoporous silica target: a first UV laser (at 205 nm) will bring Ps from the ground to the n = 3 state; a second laser pulse (tunable in the range 1650–1700 nm) will further excite Ps to the Rydberg state.
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28. Laser excitation of then=3level of positronium for antihydrogen production
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B. Rienäcker, Roberto S. Brusa, S. Vamosi, V. Petracek, Luca Penasa, I. L. Jernelv, Giovanni Cerchiari, L. Cabaret, Alberto Rotondi, T. Huse, L. Di Noto, Paola Scampoli, G. Nebbia, M. Sacerdoti, James William Storey, Sergei Gninenko, Claude Amsler, Marco Prevedelli, V. Lagomarsino, I. C. Tietje, Simone Cialdi, M. Kimura, Adriano Fontana, E. Jordan, Sebastian Gerber, Heidi Sandaker, K. Chlouba, Sebastiano Mariazzi, Giovanni Consolati, Germano Bonomi, A. Demetrio, F. Guatieri, Massimo Caccia, M. Spacek, L. Resch, Nicola Zurlo, C. Evans, P. Bräunig, J. Bremer, F. Prelz, Viktor Matveev, E. Widmann, C. Pistillo, Ruggero Caravita, Akitaka Ariga, Ola Kenji Forslund, Davide Pagano, Rafael Ferragut, S. Haider, Daniel Comparat, Alexey Dudarev, J. Fesel, Ole Røhne, Romualdo Santoro, Stefano Aghion, Marco Giammarchi, Sebastian Lehner, Z. Mazzotta, Felice Sorrentino, Alban Kellerbauer, Chloé Malbrunot, P. Lebrun, D. Krasnicky, L. Marx, Nicola Pacifico, P. Lansonneur, L. Ravelli, I. M. Strojek, T. Koettig, Lillian Smestad, H. Holmestad, Antonio Ereditato, Tomoko Ariga, G. Testera, Fabrizio Castelli, Patrick Nedelec, Michael Doser, Johann Zmeskal, J. Liberadzka, M. Oberthaler, Angela Gligorova, P. Yzombard, Aghion, S., Amsler, C., Ariga, A., Ariga, T., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Forslund, O. K., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Jernelv, I. L., Jordan, E., Kellerbauer, A., Kimura, M., Koettig, T., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Lehner, S., Liberadzka, J., Malbrunot, C., Mariazzi, S., Marx, L., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, Marco, Ravelli, L., Resch, L., Rienäcker, B., Røhne, O. M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Smestad, L., Sorrentino, F., Spacek, M., Storey, J., Strojek, I. M., Testera, G., Tietje, I., Vamosi, S., Widmann, E., Yzombard, P., Zmeskal, J., Zurlo, N., Prevedelli, M., Scampoli, Paola, Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and AEGIS
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COLLISIONS ,Atomic and Molecular Physics, and Optics, ANNIHILATION LIFETIME ,SLOW POSITRONS ,TRANSITION ,PHYSICS ,ANTIPROTONS ,TRANSPORT ,PLASMA ,STATES ,530 Physics ,Spectroscopy, particle physics ,01 natural sciences ,010305 fluids & plasmas ,law.invention ,Positronium ,Nuclear physics ,law ,Atomic and Molecular Physics ,0103 physical sciences ,Physics::Atomic and Molecular Clusters ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Physics::Atomic Physics ,010306 general physics ,Antihydrogen ,Physics ,Plasma ,Laser ,Atomic and Molecular Physics, and Optics ,Antiproton ,and Optics ,Atomic physics ,ANNIHILATION LIFETIME ,Particle Physics - Experiment ,Excitation - Abstract
We demonstrate laser excitation of the n=3 state of positronium (Ps) in vacuum. A specially designed high-efficiency pulsed slow positron beam and single shot positronium annihilation lifetime spectroscopy were used to produce and detect Ps. Pulsed laser excitation of n=3 level at 205 nm was monitored via Ps photoionization induced by a second intense laser pulse at 1064 nm. About 15% of the overall positronium emitted in vacuum was excited to n=3 and photoionized. Saturation of both the n=3 excitation and the following photoionization was observed and is explained by a simple rate equation model. Scanning the laser frequency allowed us to extract the positronium transverse temperature related to the width of the Doppler-broadened line. Moreover, preliminary observation of excitation to Rydberg states (n = 15...17) using n=3 as intermediate level was observed, giving an independent confirmation of efficient excitation to the 33P state. We demonstrate the laser excitation of the n=3 state of positronium (Ps) in vacuum. A combination of a specially designed pulsed slow positron beam and a high-efficiency converter target was used to produce Ps. Its annihilation was recorded by single-shot positronium annihilation lifetime spectroscopy. Pulsed laser excitation of the n=3 level at a wavelength λ≈205 nm was monitored via Ps photoionization induced by a second intense laser pulse at λ=1064 nm. About 15% of the overall positronium emitted into vacuum was excited to n=3 and photoionized. Saturation of both the n=3 excitation and the following photoionization was observed and explained by a simple rate equation model. The positronium's transverse temperature was extracted by measuring the width of the Doppler-broadened absorption line. Moreover, excitation to Rydberg states n=15 and 16 using n=3 as the intermediate level was observed, giving an independent confirmation of excitation to the $3^{3}P$ state.
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- 2016
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29. Probing antimatter gravity – The AEGIS experiment at CERN
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Giovanni Consolati, G. Nebbia, Germano Bonomi, Tomoko Ariga, M. Spacek, Antonio Ereditato, Sebastiano Mariazzi, L. Smestad, Romualdo Santoro, L. Cabaret, Z. Mazzotta, Rafael Ferragut, Sandra Zavatarelli, T. Huse, Alban Kellerbauer, M. Oberthaler, Angela Gligorova, Sebastian Lehner, Patrick Nedelec, Johann Zmeskal, P. Lebrun, F. Prelz, C. Pistillo, T. Koettig, J. Liberadzka, Paola Scampoli, L. Ravelli, James William Storey, Ruggero Caravita, M. Kimura, H. Holmestad, V. A. Matveev, Claude Amsler, Marco Giammarchi, Davide Pagano, Felice Sorrentino, P. Lansonneur, Adriano Fontana, P. Yzombard, G. Testera, Daniel Comparat, I. M. Strojek, M. Sacerdoti, Fabrizio Castelli, D. Krasnický, S. Haider, Nicola Zurlo, A. Demetrio, Michael Doser, Marco Prevedelli, C. Evans, I. C. Tietje, Massimo Caccia, K. Chlouba, N. Pacifico, Stefano Aghion, Giovanni Cerchiari, Luca Penasa, Eberhard Widmann, Sebastian Gerber, P. Bräunig, V. Lagomarsino, F. Guatieri, B. Rienäcker, Roberto S. Brusa, Chloé Malbrunot, V. Petracek, Simone Cialdi, E. Jordan, L. Di Noto, J. Fesel, Akitaka Ariga, J. Bremer, Alexey Dudarev, Alberto Rotondi, Heidi Sandaker, Ole Røhne, Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), AEGIS, Bravina, L., Foka Y., Kabana S., Kellerbauer, A., Aghion, S., Amsler, C., Ariga, A., Ariga, T., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Jordan, E., Kimura, M., Koettig, T., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Lehner, S., Liberadzka, J., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nédélec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petráček, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Rienäcker, B., Røhne, O.M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Smestad, L., Sorrentino, F., Špaček, M., Storey, J., Strojek, I.M., Testera, G., Tietje, I., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Zurlo, N., Røhne, O. M., and Strojek, I. M.
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Physics ,Atom interferometer ,Particle physics ,Physics::General Physics ,010308 nuclear & particles physics ,General Relativity and Cosmology ,QC1-999 ,01 natural sciences ,Antiproton Decelerator ,Nuclear physics ,Physics and Astronomy (all) ,Physics and Astronomy. Antimatter. Antiprotons. Gravitational acceleration ,Gravitational field ,Deflection (physics) ,Antiproton ,Antimatter ,0103 physical sciences ,[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] ,Physics::Atomic Physics ,Equivalence principle ,gravity, antimatter ,010306 general physics ,Antihydrogen - Abstract
International audience; The weak equivalence principle states that the motion of a body in a gravitational field is independent of its structure or composition. This postulate of general relativity has been tested to very high precision with ordinary matter, but no relevant experimental verification with antimatter has ever been carried out. The AEGIS experiment will measure the gravitational acceleration of antihydrogen to ultimately 1% precision. For this purpose, a pulsed horizontal antihydrogen beam with a velocity of several 100 m s−1 will be produced. Its vertical deflection due to gravity will be detected by a setup consisting of material gratings coupled with a position-sensitive detector, operating as a moiré deflectometer or an atom interferometer. The AEGIS experiment is installed at CERN’s Antiproton Decelerator, currently the only facility in the world which produces copious amounts of low-energy antiprotons. The construction of the setup has been going on since 2010 and is nearing completion. A proof-of-principle experiment with antiprotons has demonstrated that the deflection of antiparticles by a few μm due to an external force can be detected. Technological and scientific development pertaining to specific challenges of the experiment, such as antihydrogen formation by positronium charge exchange or the position-sensitive detection of antihydrogen annihilations, is ongoing.
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- 2016
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30. Positron manipulation and positronium laser excitation in AEgIS
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Daniel Comparat, Sandra Zavatarelli, Marco Giammarchi, Laura Resch, Giovanni Consolati, Giovanni Cerchiari, Germano Bonomi, M. Sacerdoti, F. Sorrentino, M. Spacek, G. Nebbia, Angela Gligorova, P. Lebrun, Marco Prevedelli, M. Kimura, H. Holmestad, P. Lansonneur, S. Haider, Heidi Sandaker, I. C. Tietje, Paola Scampoli, F. Prelz, James William Storey, T. Kaltenbacher, G. Testera, Tomoko Ariga, N. Pacifico, A. Demetrio, Stefan Rosenberger, Viktor Matveev, C. Evans, Romualdo Santoro, L. Ravelli, Markus K. Oberthaler, Karl Chlouba, Luca Penasa, Fabrizio Castelli, Davide Pagano, Simone Cialdi, Claude Amsler, Michael Doser, E. Jordan, Daniel Krasnicky, Alberto Rotondi, C. Pistillo, Ruggero Caravita, Ola Kenji Forslund, Sebastiano Mariazzi, Patrick Nedelec, Lea Di Noto, Adriano Fontana, P. Yzombard, Johann Zmeskal, Sebastian Gerber, L. Cabaret, T. Huse, J. Liberadzka, F. Guatieri, B. Rienäcker, Roberto S. Brusa, S. Vamosi, V. Petracek, Sebastian Lehner, Izabela M Strojek, Antonio Ereditato, Alexey Dudarev, J. Fesel, S. Gninenko, Z. Mazzotta, Alban Kellerbauer, Chloé Malbrunot, Lisa Marx, Ole Røhne, Rafael Ferragut, Ine L Jernelv, Akitaka Ariga, P. Bräunig, J. Bremer, Stefano Aghion, Eberhard Widmann, V. Lagomarsino, Torsten Koetting, Massimo Caccia, Mariazzi, S., Caravita, R., Aghion, S., Amsler, C., Ariga, A., Ariga, T., Bonomi, G., Braunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Forslund, O. K., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Jernelv, I. L., Jordan, E., Kaltenbacher, T., Kellerbauer, A., Kimura, M., Koetting, T., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Lehner, S., Liberadzka, J., Malbrunot, C., Marx, L., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Resch, L., Rienacker, B., Rohne, O. M., Rosenberger, S., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Sorrentino, F., Spacek, M., Storey, J., Strojek, I. M., Testera, G., Tietje, I., Vamosi, S., Widmann, E., Yzombard, P., Zavatarelli, S., and Zmeskal, J.
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Positron ,Positronium ,Radiation ,Materials Science (all) ,Condensed Matter Physics ,01 natural sciences ,010305 fluids & plasmas ,law.invention ,symbols.namesake ,law ,0103 physical sciences ,Physics::Atomic and Molecular Clusters ,General Materials Science ,Physics::Atomic Physics ,010306 general physics ,Antihydrogen ,Physics ,Laser ,Excited state ,Antimatter ,Rydberg formula ,symbols ,Atomic physics ,Excitation - Abstract
Production of antihydrogen by using the charge exchange reaction, as proposed by AEgIS (Antimatter Experiment: gravity, Interferometry, Spectroscopy), requires the formation of a dense cloud of positronium atoms excited to Rydberg states. In this work, the recent advances in AEgIS towards this result are described. Namely, the manipulation of positrons to produce bunches containing more than 108 particles and the laser excitation of positronium to Rydberg states, using n=3 as intermediate level, are presented.
- Published
- 2016
31. Direct detection of antiprotons with the Timepix3 in a new electrostatic selection beamline
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K. Chlouba, N. Pacifico, Chloé Malbrunot, Daniel Comparat, Luca Penasa, Nicola Zurlo, L. Di Noto, M. Kimura, Ole Røhne, P. Lansonneur, G. Nebbia, D. Krasnický, L. Smestad, A. Demetrio, Giovanni Consolati, Germano Bonomi, Sebastiano Mariazzi, Stefano Aghion, C. Evans, Massimo Caccia, Lukas Tlustos, M. Campbell, M. Spacek, J. Alozy, Giovanni Cerchiari, P. Bräunig, Roberto S. Brusa, V. Petracek, J. Bremer, Adriano Fontana, Gerard Lawler, M. Oberthaler, Angela Gligorova, Eberhard Widmann, P. Yzombard, Sandra Zavatarelli, L. Cabaret, T. Huse, V. Lagomarsino, Akitaka Ariga, P. Lebrun, M. Sacerdoti, Alexey Dudarev, Romualdo Santoro, Marco Prevedelli, Marco Giammarchi, X. Llopart, J. Fesel, Rafael Ferragut, I. C. Tietje, Paola Scampoli, James William Storey, Z. Mazzotta, Antonio Ereditato, Patrick Nedelec, Alban Kellerbauer, Claude Amsler, L. Resch, Johann Zmeskal, L. Marx, Felice Sorrentino, S. Haider, F. Prelz, Sebastian Gerber, C. Pistillo, F. Guatieri, H. Holmestad, Ruggero Caravita, Tomoko Ariga, V. A. Matveev, L. Ravelli, Davide Pagano, G. Testera, I. M. Strojek, Fabrizio Castelli, Simone Cialdi, E. Jordan, Michael Doser, Heidi Sandaker, Alberto Rotondi, Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Pacifico, N, Aghion, S., Alozy, J., Amsler, C., Ariga, A., Ariga, T., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R.S., Cabaret, L., Caccia, M., Campbell, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Evans, C., Ferragut, R., Fesel, J., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Jordan, E., Kellerbauer, A., Kimura, M., Krasnický, D., Lagomarsino, V., Lansonneur, P., Lawler, G., Lebrun, P., Llopart, X., Malbrunot, C., Mariazzi, S., Marx, L., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Resch, L., Røhne, O.M., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, P., Smestad, L., Sorrentino, F., Spacek, M., Storey, J., Strojek, I.M., Testera, G., Tietje, I., Tlustos, L., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Zurlo, N., Brusa, R. S., Røhne, O. M., Scampoli, Paola, and Strojek, I. M.
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Antimatter ,Silicon ,Nuclear and High Energy Physics ,AEgIS ,Antiprotons ,Detector ,Timepix ,Antiproton ,01 natural sciences ,Nuclear physics ,Instrumentation ,0103 physical sciences ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,010306 general physics ,Physics ,Large Hadron Collider ,Annihilation ,010308 nuclear & particles physics ,Antiproton Decelerator ,Time of flight ,Beamline ,High Energy Physics::Experiment - Abstract
see paper for full list of authors; International audience; We present here the first results obtained employing the Timepix3 for the detection and tagging of annihilations of low energy antiprotons. The Timepix3 is a recently developed hybrid pixel detector with advanced Time-of-Arrival and Time-over-Threshold capabilities and has the potential of allowing precise kinetic energy measurements of low energy charged particles from their time of flight. The tagging of the characteristic antiproton annihilation signature, already studied by our group, is enabled by the high spatial and energy resolution of this detector. In this study we have used a new, dedicated, energy selection beamline (GRACE). The line is symbiotic to the AEgIS experiment at the CERN Antiproton Decelerator and is dedicated to detector tests and possibly antiproton physics experiments. We show how the high resolution of the Timepix3 on the Time-of-Arrival and Time-over-Threshold information allows for a precise 3D reconstruction of the annihilation prongs. The presented results point at the potential use of the Timepix3 in antimatter-research experiments where a precise and unambiguous tagging of antiproton annihilations is required.
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- 2016
- Full Text
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32. Positron bunching and electrostatic transport system for the production and emission of dense positronium clouds into vacuum
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C. Pistillo, M. Sacerdoti, Ruggero Caravita, Marco Prevedelli, I. C. Tietje, L. Cabaret, Ola Kenji Forslund, T. Huse, S. Rosenberger, Patrick Nedelec, V. A. Matveev, Adriano Fontana, Giovanni Cerchiari, Johann Zmeskal, Sandra Zavatarelli, J. Liberadzka, Simone Cialdi, E. Jordan, Marco Giammarchi, G. Nebbia, Fiodor Sorrentino, Akitaka Ariga, Daniel Comparat, M. Kimura, N. Pacifico, Z. Mazzotta, G. Testera, Giovanni Consolati, A. S. Belov, Germano Bonomi, Romualdo Santoro, Luca Penasa, D. Krasnicky, I. L. Jernelv, T. Kaltenbacher, M. Spacek, Alban Kellerbauer, A. Demetrio, Sebastiano Mariazzi, Fabrizio Castelli, Chloé Malbrunot, Heidi Sandaker, P. Lansonneur, Ole Røhne, C. Evans, Michael Doser, S. N. Gninenko, J. Fesel, M. Oberthaler, L. Marx, Angela Gligorova, H. Holmestad, Paola Scampoli, James William Storey, P. Bräunig, F. Prelz, P. Yzombard, Alberto Rotondi, Claude Amsler, T. Koetting, B. Rienäcker, Sebastian Gerber, Roberto S. Brusa, S. Vamosi, J. Bremer, V. Petracek, Antonio Ereditato, K. Chlouba, F. Guatieri, Sebastian Lehner, Alexey Dudarev, Stefano Aghion, S. Haider, P. Lebrun, Eberhard Widmann, V. Lagomarsino, L. Di Noto, L. Ravelli, Davide Pagano, Tomoko Ariga, I. M. Strojek, Massimo Caccia, Aghion, S., Amsler, C., Ariga, A., Ariga, T., Belov, A. S., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Evans, C., Fesel, J., Fontana, A., Forslund, O. K., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Guatieri, F., Haider, S., Holmestad, H., Huse, T., Jernelv, I. L., Jordan, E., Kaltenbacher, T., Kellerbauer, A., Kimura, M., Koetting, T., Krasnicky, D., Lagomarsino, V., Lebrun, P., Lansonneur, P., Lehner, S., Liberadzka, J., Malbrunot, C., Mariazzi, S., Marx, L., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Pagano, D., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Rienäcker, B., Røhne, O. M., Rosenberger, S., Rotondi, A., Sacerdoti, M., Sandaker, H., Santoro, R., Scampoli, Paola, Sorrentino, F., Spacek, M., Storey, J., Strojek, I. M., Testera, G., Tietje, I., Vamosi, S., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Belov, A.S., Braunig, P., Brusa, R.S., Forslund, O.K., Jernelv, I.L., Rienacker, B., Rohne, O.M., Scampoli, P., Strojek, I.M., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and AEGIS
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Physics ,Bunching ,Positron ,Positronium ,Instrumentation ,Nuclear and High Energy Physics ,530 Physics ,Astrophysics::High Energy Astrophysical Phenomena ,Porous silicon ,Positron, Positronium, Bunching ,Magnetic field ,Full width at half maximum ,Bunches ,Physics in General ,Physics::Accelerator Physics ,High Energy Physics::Experiment ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Positron emission ,Atomic physics ,Spectroscopy - Abstract
International audience; We describe a system designed to re-bunch positron pulses delivered by an accumulator supplied by a positron source and a Surko-trap. Positron pulses from the accumulator are magnetically guided in a 0.085 T field and are injected into a region free of magnetic fields through a μμ-metal field terminator. Here positrons are temporally compressed, electrostatically guided and accelerated towards a porous silicon target for the production and emission of positronium into vacuum. Positrons are focused in a spot of less than 4 mm FWTM in bunches of ∼8 ns FWHM. Emission of positronium into the vacuum is shown by single shot positron annihilation lifetime spectroscopy.
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- 2015
- Full Text
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33. The AEgIS experiment
- Author
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Sebastiano Mariazzi, A. S. Belov, Marco Prevedelli, Marco Giammarchi, Z. Mazzotta, S. N. Gninenko, J. Bremer, Alban Kellerbauer, Rafael Ferragut, F. Prelz, L. Cabaret, Giovanni Cerchiari, Sebastian Gerber, Chloé Malbrunot, Simone Cialdi, Ole Røhne, E. Jordan, C. Pistillo, M. Kimura, T. Huse, Ruggero Caravita, N. Pacifico, D. Krasnický, Daniel Comparat, Alexey Dudarev, S. Rosenberger, Luca Penasa, A. Demetrio, Jiro Kawada, Akitaka Ariga, Alberto Rotondi, L. Di Noto, V. A. Matveev, S. D. Hogan, K. Chlouba, Sandra Zavatarelli, L. Semeria, Heidi Sandaker, Sebastian Lehner, Romualdo Santoro, Roberto S. Brusa, Paola Scampoli, Eberhard Widmann, James William Storey, V. Petracek, V. Lagomarsino, Claude Amsler, Stefano Aghion, M. Subieta, P. Bräunig, Massimo Caccia, Adriano Fontana, Tomoko Ariga, Cristina Riccardi, Giovanni Consolati, Germano Bonomi, M. Spacek, S. Curreli, S. Haider, Patrick Nedelec, Johann Zmeskal, H. Derking, G. Testera, Antonio Ereditato, M. Oberthaler, Angela Gligorova, Fabrizio Castelli, P. Yzombard, Michael Doser, M. C. Simon, L. Ravelli, H. Holmestad, I. M. Strojek, G. Nebbia, Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), AEGIS, Testera, G., Aghion, S., Amsler, C., Ariga, A., Ariga, T., Belov, A., Bonomi, G., Braunig, P., Bremer, J., Brusa, R., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Curreli, S., Demetrio, A., Derking, H., Noto, L. Di, Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Haider, S., Hogan, S., Holmestad, H., Huse, T., Jordan, E. J., Kawada, J., Kellerbauer, A., Kimura, M., Krasnický, D., Lagomarsino, V., Lehner, S., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Riccardi, C., Røhne, O. M., Rosenberger, S., Rotondi, A., Sandaker, H., Santoro, R., Scampoli, Paola, Semeria, L., Simon, M., Spacek, M., Storey, J., Strojek, I. M., Subieta, M., Widmann, E., Yzombard, P., Zavatarelli, S., and Zmeskal, J.
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Physics::General Physics ,Nuclear and High Energy Physics ,Atomic and Molecular Physics, and Optic ,530 Physics ,Electron ,Condensed Matter Physic ,Gravitational acceleration ,01 natural sciences ,Nuclear physics ,Atomic and Molecular Physics ,0103 physical sciences ,Antihydrogen ,Equivalence Principle ,Traps ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,Physical and Theoretical Chemistry ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Physics::Atomic Physics ,Equivalence principle ,010306 general physics ,Nuclear and High Energy Physic ,Physics ,Large Hadron Collider ,010308 nuclear & particles physics ,Trap ,Antiproton ,Antimatter ,Physics::Accelerator Physics ,and Optics ,Beam (structure) - Abstract
see paper for full list of authors; International audience; The AEgIS experiment is presently almost completely installed at CERN. It is currently taking data with antiprotons, electrons and positrons. The apparatus is designed to form a cold, pulsed beam of antihydrogen to measure the Earth’s gravitational acceleration g on antimatter and to perform spectroscopy measurements. This paper describes the main features of the apparatus and shows a selected review of some achieved results.
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- 2015
- Full Text
- View/download PDF
34. Emulsion detectors for the antihydrogen detection in AEgIS
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G. Testera, Ole Røhne, S. N. Gninenko, Fabrizio Castelli, M. Subieta, Michael Doser, M. C. Simon, C. Pistillo, Paola Scampoli, James William Storey, Claude Amsler, Giovanni Consolati, Ruggero Caravita, Patrick Nedelec, Akitaka Ariga, H. Holmestad, Germano Bonomi, K. Chlouba, Johann Zmeskal, M. Spacek, L. Cabaret, G. Nebbia, T. Huse, Chloé Malbrunot, P. Bräunig, S. Rosenberger, H. Derking, F. Prelz, J. Bremer, Marco Giammarchi, V. A. Matveev, Sebastiano Mariazzi, Alexey Dudarev, Rafael Ferragut, Daniel Comparat, Z. Mazzotta, Alban Kellerbauer, Sebastian Gerber, Stefano Aghion, Simone Cialdi, Sebastian Lehner, S. D. Hogan, E. Jordan, A. S. Belov, S. Haider, N. Pacifico, M. Oberthaler, Luca Penasa, Angela Gligorova, P. Yzombard, Antonio Ereditato, Cristina Riccardi, Tomoko Ariga, L. Ravelli, I. M. Strojek, Massimo Caccia, V. Petráček, Eberhard Widmann, V. Lagomarsino, Jiro Kawada, L. Di Noto, Sandra Zavatarelli, Marco Prevedelli, Romualdo Santoro, M. Kimura, D. Krasnický, A. Demetrio, Heidi Sandaker, Alberto Rotondi, Andrea Fontana, Giovanni Cerchiari, R. S. Brusa, Pistillo, C, Aghion, S., Amsler, C., Ariga, A., Ariga, T., Belov, A., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Demetrio, A., Derking, H., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Haider, S., Hogan, S., Holmestad, H., Huse, T., Jordan, E. J., Kawada, J., Kellerbauer, A., Kimura, M., Krasnický, D., Lagomarsino, V., Lehner, S., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nédélec, P., Oberthaler, M., Pacifico, N., Penasa, L., Petráček, V., Prelz, F., Prevedelli, M., Ravelli, L., Riccardi, C., Røhne, O., Rosenberger, S., Rotondi, A., Sandaker, H., Santoro, R., Scampoli, Paola, Simon, M., Špaček, M., Storey, J., Strojek, I. M., Subieta, M., Testera, G., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Laboratoire Aimé Cotton (LAC), Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-École normale supérieure - Cachan (ENS Cachan), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and AEGIS
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Nuclear and High Energy Physics ,Physics::General Physics ,Antimatter ,Atomic and Molecular Physics, and Optic ,530 Physics ,Physics::Instrumentation and Detectors ,Condensed Matter Physic ,01 natural sciences ,Nuclear physics ,Gravitational field ,Atomic and Molecular Physics ,0103 physical sciences ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,Physical and Theoretical Chemistry ,010306 general physics ,Antihydrogen ,Nuclear and High Energy Physic ,Physics ,Large Hadron Collider ,010308 nuclear & particles physics ,Emulsion ,Detector ,Gravitational interaction ,Emulsions ,Condensed Matter Physics ,Atomic and Molecular Physics, and Optics ,and Optics ,Beam (structure) - Abstract
see paper for full list of authors; International audience; The AEgIS experiment at CERN aims to perform the first direct measurement of gravitational interaction between matter and antimatter by measuring the deviation of a cold antihydrogen beam in the Earth gravitational field. The design of the experiment has been recently updated to include emulsion films as position sensitive detector. The submicrometric position accuracy of emulsions leads indeed to a significant improvement of the experimental sensitivity. We present results of preliminary tests and discuss perspectives for the final measurement.
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- 2015
- Full Text
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35. Particle tracking at cryogenic temperatures: the Fast Annihilation Cryogenic Tracking (FACT) detector for the AEgIS antimatter gravity experiment
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Sandra Zavatarelli, Tomoko Ariga, Andrea Fontana, Giovanni Consolati, Marco Prevedelli, Chloé Malbrunot, Germano Bonomi, L. Ravelli, M. Spacek, G. Nebbia, S. N. Gninenko, S. Haider, Sebastiano Mariazzi, Simone Cialdi, J. Bremer, L. Cabaret, I. M. Strojek, T. Huse, E. Jordan, A. S. Belov, Ole Røhne, Sebastian Gerber, M. Kimura, Markus K. Oberthaler, S. D. Hogan, Heidi Sandaker, Rafael Ferragut, P. Scampoli, C. Pistillo, F. Prelz, Marco Giammarchi, Ruggero Caravita, Giovanni Cerchiari, Alberto Rotondi, K. Chlouba, Romualdo Santoro, Z. Mazzotta, Akitaka Ariga, James William Storey, Alban Kellerbauer, Daniel Comparat, Alexey Dudarev, V. A. Matveev, Claude Amsler, R. Vaccarone, Patrick Nedelec, Johann Zmeskal, H. Derking, M. Subieta, Angela Gligorova, P. Yzombard, N. Pacifico, Stefano Aghion, R. S. Brusa, Luca Penasa, P. Bräunig, Alice Magnani, Sebastian Lehner, Eberhard Widmann, V. Lagomarsino, Massimo Caccia, V. Petráček, Jiro Kawada, L. Di Noto, M. C. Simon, S. Rosenberger, H. Holmestad, D. Krasnicky, Antonio Ereditato, G. Testera, Cristina Riccardi, Fabrizio Castelli, Michael Doser, Storey, J., Aghion, S., Amsler, C., Ariga, A., Ariga, T., Belov, A., Bonomi, G., Braunig, P., Bremer, J., Brusa, R., Cabaret, L., Caccia, M., Caravita, R., Castelli, F., Cerchiari, G., Chlouba, K., Cialdi, S., Comparat, D., Consolati, G., Derking, H., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Gerber, S., Giammarchi, M., Gligorova, A., Gninenko, S., Haider, S., Hogan, S., Holmestad, H., Huse, T., Jordan, E. J., Kawada, J., Kellerbauer, A., Kimura, M., Krasnicky, D., Lagomarsino, V., Lehner, S., Magnani, A., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Nebbia, G., Nedelec, P., Oberthaler, M., Pacifico, N., Penasa, L., Petracek, V., Pistillo, C., Prelz, F., Prevedelli, M., Ravelli, L., Riccardi, C., Rohne, O. M., Rosenberger, S., Rotondi, A., Sandaker, H., Santoro, R., Scampoli, P., Simon, M., Spacek, M., Strojek, I. M., Subieta, M., Testera, G., Vaccarone, R., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and AEgIS
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Atom interferometer ,gas and liquid scintillators) ,Physics::Instrumentation and Detectors ,530 Physics ,Context (language use) ,Cryogenics ,Tracking (particle physics) ,Nuclear physics ,Particle tracking detectors ,Scintillators, scintillation and light emission processes (solid, gas and liquid scintillators) ,Silicon photomultiplier ,Physics::Atomic and Molecular Clusters ,Physics::Atomic Physics ,Detectors and Experimental Techniques ,Antihydrogen ,Instrumentation ,Mathematical Physics ,Physics ,Detector ,antimatter. scintillating fibers ,[SDU.ASTR.IM]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Instrumentation and Methods for Astrophysic [astro-ph.IM] ,Particle tracking detector ,antimatter. scintillating fibers, silicon photomultipliers ,scintillation and light emission processes (solid ,Scintillators ,Antimatter ,silicon photomultipliers - Abstract
see paper for full list of authors; International audience; The AEgIS experiment is an interdisciplinary collaboration between atomic, plasma and particle physicists, with the scientific goal of performing the first precision measurement of the Earth's gravitational acceleration on antimatter. The principle of the experiment is as follows: cold antihydrogen atoms are synthesized in a Penning-Malmberg trap and are Stark accelerated towards a moiré deflectometer, the classical counterpart of an atom interferometer, and annihilate on a position sensitive detector. Crucial to the success of the experiment is an antihydrogen detector that will be used to demonstrate the production of antihydrogen and also to measure the temperature of the anti-atoms and the creation of a beam. The operating requirements for the detector are very challenging: it must operate at close to 4 K inside a 1 T solenoid magnetic field and identify the annihilation of the antihydrogen atoms that are produced during the 1 μs period of antihydrogen production. Our solution—called the FACT detector—is based on a novel multi-layer scintillating fiber tracker with SiPM readout and off the shelf FPGA based readout system. This talk will present the design of the FACT detector and detail the operation of the detector in the context of the AEgIS experiment.
- Published
- 2015
- Full Text
- View/download PDF
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