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239 results on '"CARAVITA, R."'

1. TALOS (Total Automation of LabVIEW Operations for Science): A framework for autonomous control systems for complex experiments

Author

Volponi, M., Zieliński, J., Rauschendorfer, T., Huck, S., Caravita, R., Auzins, M., Bergmann, B., Burian, P., Brusa, R. S., Camper, A., Castelli, F., Cerchiari, G., Ciuryło, R., Consolati, G., Doser, M., Eliaszuk, K., Giszczak, A., Glöggler, L. T., Graczykowski, Ł., Grosbart, M., Guatieri, F., Gusakova, N., Gustafsson, F., Haider, S., Janik, M. A., Januszek, T., Kasprowicz, G., Khatri, G., Kłosowski, Ł., Kornakov, G., Krumins, V., Lappo, L., Linek, A., Malamant, J., Mariazzi, S., Penasa, L., Petracek, V., Piwiński, M., Pospisil, S., Povolo, L., Prelz, F., Rangwala, S. A., Rawat, B. S., Rienäcker, B., Rodin, V., Røhne, O. M., Sandaker, H., Smolyanskiy, P., Sowiński, T., Tefelski, D., Vafeiadis, T., Welsch, C. P., Wolz, T., Zawada, M., and Zurlo, N.

Subjects
Physics - Instrumentation and Detectors, Physics - Atomic Physics
Abstract

Modern physics experiments are frequently very complex, relying on multiple simultaneous events to happen in order to obtain the desired result. The experiment control system plays a central role in orchestrating the measurement setup: However, its development is often treated as secondary with respect to the hardware, its importance becoming evident only during the operational phase. Therefore, the AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) collaboration has created a framework for easily coding control systems, specifically targeting atomic, quantum, and antimatter experiments. This framework, called Total Automation of LabVIEW Operations for Science (TALOS), unifies all the machines of the experiment in a single entity, thus enabling complex high-level decisions to be taken, and it is constituted by separate modules, called MicroServices, that run concurrently and asynchronously. This enhances the stability and reproducibility of the system while allowing for continuous integration and testing while the control system is running. The system demonstrated high stability and reproducibility, running completely unsupervised during the night and weekends of the data-taking campaigns. The results demonstrate the suitability of TALOS to manage an entire physics experiment in full autonomy: being open-source, experiments other than the AEgIS experiment can benefit from it.

Published
2024
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2. Real-time antiproton annihilation vertexing with sub-micron resolution

Author

Berghold, M., Orsucci, D., Guatieri, F., Alfaro, S., Auzins, M., Bergmann, B., Burian, P., Brusa, R. S., Camper, A., Caravita, R., Castelli, F., Cerchiari, G., Ciuryło, R., Chehaimi, A., Consolati, G., Doser, M., Eliaszuk, K., Ferguson, R., Germann, M., Giszczak, A., Glöggler, L. T., Graczykowski, Ł., Grosbart, M., Gusakova, N., Gustafsson, F., Haider, S., Huck, S., Hugenschmidt, C., Janik, M. A., Januszek, T., Kasprowicz, G., Kempny, K., Khatri, G., Kłosowski, Ł., Kornakov, G., Krumins, V., Lappo, L., Linek, A., Mariazzi, S., Moskal, P., Nowicka, D., Pandey, P., Pęcak, D., Penasa, L., Petracek, V., Piwiński, M., Pospisil, S., Povolo, L., Prelz, F., Rangwala, S. A., Rauschendorfer, T., Rawat, B. S., Rienäcker, B., Rodin, V., Røhne, O. M., Sandaker, H., Sharma, S., Smolyanskiy, P., Sowiński, T., Tefelski, D., Vafeiadis, T., Volponi, M., Welsch, C. P., Zawada, M., Zielinski, J., and Zurlo, N.

Subjects
Physics - Instrumentation and Detectors
Abstract

The primary goal of the AEgIS experiment is to precisely measure the free fall of antihydrogen within Earth's gravitational field. To this end, a cold ~50K antihydrogen beam has to pass through two grids forming a moir\'e deflectometer before annihilating onto a position-sensitive detector, which shall determine the vertical position of the annihilation vertex relative to the grids with micrometric accuracy. Here we introduce a vertexing detector based on a modified mobile camera sensor and experimentally demonstrate that it can measure the position of antiproton annihilations with an accuracy of $0.62^{+0.40}_{-0.22}\mu m$, which represents a 35-fold improvement over the previous state-of-the-art for real-time antiproton vertexing. Importantly, these antiproton detection methods are directly applicable to antihydrogen. Moreover, the sensitivity to light of the sensor enables the in-situ calibration of the moir\'e deflectometer, significantly reducing systematic errors. This sensor emerges as a breakthrough technology for achieving the \aegis scientific goals and has been selected as the basis for the development of a large-area detector for conducting antihydrogen gravity measurements., Comment: 21 pages, 4 figures, 2 tables

Published
2024

3. CIRCUS: an autonomous control system for antimatter, atomic and quantum physics experiments

Author

Volponi, M., Huck, S., Caravita, R., Zielinski, J., Kornakov, G., Kasprowicz, G., Nowicka, D., Rauschendorfer, T., Rienäcker, B., Prelz, F., Auzins, M., Bergmann, B., Burian, P., Brusa, R. S., Camper, A., Castelli, F., Ciuryło, R., Consolati, G., Doser, M., Glöggler, L. T., Graczykowski, Ł., Grosbart, M., Guatieri, F., Gusakova, N., Gustafsson, F., Haider, S., Janik, M., Khatri, G., Kłosowski, Ł., Krumins, V., Lappo, L., Linek, A., Malamant, J., Mariazzi, S., Penasa, L., Petracek, V., Piwiński, M., Pospisil, S., Povolo, L., Rangwala, S., Rawat, B. S., Rodin, V., Røhne, O. M., Sandaker, H., Smolyanskiy, P., Sowiński, T., Tefelski, D., Vafeiadis, T., Welsch, C. P., Wolz, T., Zawada, M., and Zurlo, N.

Published
2024
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4. Positronium laser cooling via the $1^3S$-$2^3P$ transition with a broadband laser pulse

Author

Glöggler, L. T., Gusakova, N., Rienäcker, B., Camper, A., Caravita, R., Huck, S., Volponi, M., Wolz, T., Penasa, L., Krumins, V., Gustafsson, F., Auzins, M., Bergmann, B., Burian, P., Brusa, R. S., Castelli, F., Ciuryło, R., Comparat, D., Consolati, G., Doser, M., Graczykowski, Ł., Grosbart, M., Guatieri, F., Haider, S., Janik, M. A., Kasprowicz, G., Khatri, G., Kłosowski, Ł., Kornakov, G., Lappo, L., Linek, A., Malamant, J., Mariazzi, S., Petracek, V., Piwiński, M., Pospisil, S., Povolo, L., Prelz, F., Rangwala, S. A., Rauschendorfer, T., Rawat, B. S., Rodin, V., Røhne, O. M., Sandaker, H., Smolyanskiy, P., Sowiński, T., Tefelski, D., Vafeiadis, T., Welsch, C. P., Zawada, M., Zielinski, J., and Zurlo, N.

Subjects
Physics - Atomic Physics, High Energy Physics - Experiment
Abstract

We report on laser cooling of a large fraction of positronium (Ps) in free-flight by strongly saturating the $1^3S$-$2^3P$ transition with a broadband, long-pulsed 243 nm alexandrite laser. The ground state Ps cloud is produced in a magnetic and electric field-free environment. We observe two different laser-induced effects. The first effect is an increase in the number of atoms in the ground state after the time Ps has spent in the long-lived $3^3P$ states. The second effect is the one-dimensional Doppler cooling of Ps, reducing the cloud's temperature from 380(20) K to 170(20) K. We demonstrate a 58(9) % increase in the coldest fraction of the Ps ensemble., Comment: 6 pages, 5 figures

Published
2023

5. Feasibility studies for imaging e$^{+}$e$^{-}$ annihilation with modular multi-strip detectors

Author

Sharma, S., Povolo, L., Mariazzi, S., Korcyl, G., Kacprzak, K., Kumar, D., Niedzwiecki, S., Baran, J., Beyene, E., Brusa, R. S., Caravita, R., Chug, N., Coussat, A., Curceanu, C., Czerwinski, E., Dadgar, M., Das, M., Dulski, K., Eliyan, K., Gajos, A., Gupta, N., Hiesmayr, B. C., Kaplon, L., Kaplanoglu, T., Klimaszewski, K., Konieczka, P., Kozik, T., Kozani, M. K., Krzemien, W., Moyo, S., Mryka, W., Penasa, L., Parzych, S., Del Rio, E. Perez., Raczynski, L., Shivani, Shopa, R. Y, Skurzok, M., Stepien, E. L., Tanty, P., Tayefi, F., Tayefi, K., Wislicki, W., and Moskal, P.

Subjects
Physics - Instrumentation and Detectors, Nuclear Experiment
Abstract

Studies based on imaging the annihilation of the electron (e$^{-}$) and its antiparticle positron (e$^{+}$) open up several interesting applications in nuclear medicine and fundamental research. The annihilation process involves both the direct conversion of e$^{+}$e$^{-}$ into photons and the formation of their atomically bound state, the positronium atom (Ps), which can be used as a probe for fundamental studies. With the ability to produce large quantities of Ps, manipulate them in long-lived Ps states, and image their annihilations after a free fall or after passing through atomic interferometers, this purely leptonic antimatter system can be used to perform inertial sensing studies in view of a direct test of Einstein equivalence principle. It is envisioned that modular multistrip detectors can be exploited as potential detection units for this kind of studies. In this work, we report the results of the first feasibility study performed on a e$^{+}$ beamline using two detection modules to evaluate their reconstruction performance and spatial resolution for imaging e$^{+}$e$^{-}$ annihilations and thus their applicability for gravitational studies of Ps.

Published
2023

6. J-PET detection modules based on plastic scintillators for performing studies with positron and positronium beams

Author

Sharma, S., Baran, J., Brusa, R. S., Caravita, R., Chug, N., Coussat, A., Curceanu, C., Czerwinski, E., Dadgar, M., Dulski, K., Eliyan, K., Gajos, A., Hiesmayr, B. C., Kacprzak, K., Kaplon, L., Klimaszewski, K., Konieczka, P., Korcyl, G., Kozik, T., Krzemien, W., Kumar, D., Mariazzi, S., Niedzwiecki, S., Panasa, L., Parzych, S., Povolo, L., del Rio, E. Perez, Raczynski, L., Shivani, Shopa, R. Y., Skurzok, M., Stepien, E. L., Tayefi, F., Tayefi, K., Wislicki, W., and Moskal, P.

Subjects
Physics - Instrumentation and Detectors
Abstract

The J-PET detector, which consists of inexpensive plastic scintillators, has demonstrated its potential in the study of fundamental physics. In recent years, a prototype with 192 plastic scintillators arranged in 3 layers has been optimized for the study of positronium decays. This allows performing precision tests of discrete symmetries (C, P, T) in the decays of positronium atoms. Moreover, thanks to the possibility of measuring the polarization direction of the photon based on Compton scattering, the predicted entanglement between the linear polarization of annihilation photons in positronium decays can also be studied. Recently, a new J-PET prototype was commissioned, based on a modular design of detection units. Each module consists of 13 plastic scintillators and can be used as a stand-alone, compact and portable detection unit. In this paper, the main features of the J-PET detector, the modular prototype and their applications for possible studies with positron and positronium beams are discussed. Preliminary results of the first test experiment performed on two detection units in the continuous positron beam recently developed at the Antimatter Laboratory (AML) of Trento are also reported.

Published
2023
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10. A cryogenic tracking detector for antihydrogen detection in the AEgIS experiment

Author

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., Fani, M., Ferragut, R., Gerber, S., Giammarchi, M., Gligorova, A., Guatieri, F., Hackstock, P., Haider, D., 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., Nowak, L., Oberthaler, M., Oswald, E., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Rohne, 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., and Zurlo, N.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment, Physics - Atomic Physics
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 AE\=gIS 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.

Published
2022
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12. Feasibility studies for imaging [formula omitted] annihilation with modular multi-strip detectors

Author

Sharma, S., Povolo, L., Mariazzi, S., Korcyl, G., Kacprzak, K., Kumar, D., Niedźwiecki, S., Baran, J., Beyene, E., Brusa, R.S., Caravita, R., Chug, N., Coussat, A., Curceanu, C., Czerwinski, E., Dadgar, M., Das, M., Dulski, K., Eliyan, K., Gajos, A., Gupta, N., Hiesmayr, B.C., Kapłon, Ł., Kaplanoglu, T., Klimaszewski, K., Konieczka, P., Kozik, T., Kozani, M.K., Krzemień, W., Moyo, S., Mryka, W., Penasa, L., Parzych, S., Rio, E. Perez. Del, Raczyński, L., Shivani, Shopa, R.Y., Skurzok, M., Stępień, E.Ł., Tanty, P., Tayefi, F., Tayefi, K., Wiślicki, W., and Moskal, P.

Published
2024
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13. Rydberg-positronium velocity and self-ionization studies in 1T magnetic field and cryogenic environment

Author

Antonello, M., Belov, A., Brusa, G. Bonomi R. S., Caccia, M., Camper, A., Caravita, R., Castelli, F., Comparat, D., Consolati, G., Di Noto, L., Doser, M., Fani, M., Ferragut, R., Fesel, J., Gerber, S., Gligorova, A., Glöggler, L. T., Guatieri, F., Haider, S., Hinterberger, A., Khalidova, O., Krasnicky, 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., Rienäcker, B., Røhne, O. M., Rotondi, A., Sandaker, H., Santoro, R., Testera, G., Tietje, I. C., Wolz, T., Zimmer, C., and Zurlo, N.

Subjects
Physics - Atomic Physics
Abstract

We characterized the pulsed Rydberg-positronium production inside the AEgIS (Antimatter Experiment: Gravity, Interferometry, Spectroscopy) apparatus in view of antihydrogen formation by means of a charge exchange reaction between cold antiprotons and slow Rydberg-positronium atoms. Velocity measurements on positronium along two axes in a cryogenic environment (10K) and in 1T magnetic field were performed. The velocimetry was done by MCP-imaging of photoionized positronium previously excited to the $n=3$ state. One direction of velocity was measured via Doppler-scan of this $n=3$-line, another direction perpendicular to the former by delaying the exciting laser pulses in a time-of-flight measurement. Self-ionization in the magnetic field due to motional Stark effect was also quantified by using the same MCP-imaging technique for Rydberg positronium with an effective principal quantum number $n_{eff}$ ranging between 14 and 22. We conclude with a discussion about the optimization of our experimental parameters for creating Rydberg-positronium in preparation for an efficient pulsed production of antihydrogen.

Published
2019
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14. Efficient $2^3S$ positronium production by stimulated decay from the $3^3P$ level

Author

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., Gerber, S., Gligorova, A., Guatieri, F., Hackstock, P., Haider, S., Hinterberger, A., Kellerbauer, A., Khalidova, O., Krasnicky, D., Lagomarsino, V., Lebrun, P., 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., Rienaecker, B., Robert, J., Rohne, O. M., Rotondi, A., Sandaker, H., Santoro, R., Testera, G., Tietje, I. C., Widmann, E., Wolz, T., Yzombard, P., Zimmer, C., and Zurlo, N.

Subjects
Physics - Atomic Physics, High Energy Physics - Experiment
Abstract

We investigate experimentally the possibility of enhancing the production of $2^3S$ positronium atoms by driving the $1^3S$-$3^3P$ and $3^3P$-$2^3S$ transitions, overcoming the natural branching ratio limitation of spontaneous decay from $3^3P$ to $2^3S$. The decay of $3^3P$ positronium atoms towards the $2^3S$ level has been effciently stimulated by a 1312.2nm broadband IR laser pulse. The dependence of the stimulating transition efficiency on the intensity of the IR pulse has been measured to find the optimal enhancement conditions. A maximum relative increase of $ \times (3.1 \pm 1.0) $ in the $2^3S$ production efficiency, with respect to the case where only spontaneous decay is present, was obtained., Comment: 6 pages, 4 figures

Published
2019
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15. Velocity selected production of $2^3S$ metastable positronium

Author

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., Gerber, S., 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., Mariazzi, S., Matveev, V., Muller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., 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., and Zurlo, N.

Subjects
Physics - Atomic Physics
Abstract

Positronium in the $2^3S$ metastable state exhibits a low electrical polarizability and a long lifetime (1140 ns) making it a promising candidate for interferometry experiments with a neutral matter-antimatter system. In the present work, $2^3S$ positronium is produced - in absence of electric field - via spontaneous radiative decay from the $3^3P$ level populated with a 205nm UV laser pulse. Thanks to the short temporal length of the pulse, 1.5 ns full-width at half maximum, different velocity populations of a positronium cloud emitted from a nanochannelled positron/positronium converter were selected by delaying the excitation pulse with respect to the production instant. $ 2^3S $ positronium atoms with velocity tuned between $ 7 \cdot 10^4 $ m/s and $ 10 \cdot 10^4 $ m/s were thus produced. Depending on the selected velocity, a $2^3S$ production effciency ranging from $\sim 0.8 \%$ to $\sim 1.7%$, with respect to the total amount of emitted positronium, was obtained. The observed results give a branching ratio for the $3^3P$-$2^3S$ spontaneous decay of $(9.7 \pm 2.7) \% $. The present velocity selection technique could allow to produce an almost monochromatic beam of $\sim 1 \cdot 10^3 $ $2^3S$ atoms with a velocity spread $ < 10^4 $ m/s and an angular divergence of $\sim$ 50 mrad., Comment: 6 pages, 3 figures, 1 table

Published
2018
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16. Producing long-lived $2^3\text{S}$ Ps via $3^3\text{P}$ laser excitation in magnetic and electric fields

Author

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., 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., Lagormarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Marton, J., Matveev, V., Mazzotta, Z., Muller, S. R., Nebbia, G., Nedelec, P., Oberthaler, M., Pagano, D., Penasa, L., Petracek, V., Prelz, F., Prevedelli, M., Rienaecker, B., Robert, J., Rohne, O. M., Rotondi, A., Sandacker, H., Santoro, R., Smestad, L., Sorrentino, F., Testera, G., Tietje, I. C., Vujanovic, M., Widmann, E., Yzombard, P., Zimmer, C., Zmeskal, J., and Zurlo, N.

Subjects
Physics - Atomic Physics
Abstract

Producing positronium (Ps) in the metastable $2^3\text{S}$ state is of interest for various applications in fundamental physics. We report here about an experiment in which Ps atoms are produced in this long-lived state by spontaneous radiative decay of Ps excited to the $3^3\text{P}$ level manifold. The Ps cloud excitation is obtained with a UV laser pulse in an experimental vacuum chamber in presence of guiding magnetic field of 25 mT and an average electric field of 300 V/cm. The indication of the $2^3\text{S}$ state production is obtained from a novel analysis technique of single-shot positronium annihilation lifetime spectra. Its production efficiency relative to the total amount of formed Ps is evaluated by fitting a simple rate equations model to the experimental data and found to be $ (2.1 \pm 1.3) \, \% $.

Published
2018
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18. New Bunched Positron Beam at the AntiMatter Laboratory in Trento: Planned Quantum Experiments with Positronium.

Author

MARIAZZI, S., CARAVITA, R., PENASA, L., CHEHAIMI, A., Ferguson, R. C., SALANDINI, S., BETTONTE, M., and BRUSA, R. S.

Subjects
*POSITRON beams, *ANTIMATTER, *KINETIC energy, *ACCELERATION measurements, *POSITRONS, *POSITRONIUM
Abstract

At the AntiMatter Laboratory in Trento, a new setup to produce intense bunches of positrons with a time duration of 2.5 ns and positron kinetic energy from 0.5 to 15 keV is under commissioning. The apparatus is designed for carrying out two main fundamental quantum experiments, i.e., the study of entanglement of three positronium annihilation gammas and the measurements of accelerations of positronium (including gravitational acceleration). In addition to the bunched beam, production of positronium in vacuum and its excitation in long-lived states will be necessary. Based on the acquired know-how of the AntiMatter Laboratory, the design of the experiments will be described. [ABSTRACT FROM AUTHOR]

Published
2024
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20. Measurement of antiproton annihilation on Cu, Ag and Au with emulsion films

Author

Aghion, S., Amsler, C., Ariga, A., 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., 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., Krasnicky, D., Lagomarsino, V., Lansonneur, P., Lebrun, P., Malbrunot, C., Mariazzi, S., Matveev, V., Mazzotta, Z., Muller, 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., Rohne, 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., and Zurlo, N.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
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.

Published
2017
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22. Annihilation of low energy antiprotons in silicon

Author

Aghion, S., Ahlén, O., Belov, A. S., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Burghart, G., Cabaret, L., Caccia, M., Canali, C., Caravita, R., Castelli, F., Cerchiari, G., Cialdi, S., Comparat, D., Consolati, G., Derking, J. H., Di Domizio, S., Di Noto, L., Doser, M., Dudarev, A., Ferragut, R., Fontana, A., Genova, P., Giammarchi, M., Gligorova, A., Gninenko, S. N., Haider, S., Harasimowicz, J., Huse, T., Jordan, E., Jørgensen, L. V., Kaltenbacher, T., Kellerbauer, A., Knecht, A., Krasnický, D., Lagomarsino, V., Magnani, A., Mariazzi, S., Matveev, V. A., Moia, F., Nebbia, G., Nédélec, P., Pacifico, N., Petrácek, V., Prelz, F., Prevedelli, M., Regenfus, C., Riccardi, C., Røhne, O., Rotondi, A., Sandaker, H., Sosa, A., Vasquez, M. A. Subieta, Špacek, M., Testera, G., Welsch, C. P., and Zavatarelli, S.

Subjects
Physics - Instrumentation and Detectors
Abstract

The goal of the AE$\mathrm{\bar{g}}$IS experiment at the Antiproton Decelerator (AD) at CERN, is to measure directly the Earth's gravitational acceleration on antimatter. To achieve this goal, the AE$\mathrm{\bar{g}}$IS collaboration will produce a pulsed, cold (100 mK) antihydrogen beam with a velocity of a few 100 m/s and measure the magnitude of the vertical deflection of the beam from a straight path. The final position of the falling antihydrogen will be detected by a position sensitive detector. This detector will consist of an active silicon part, where the annihilations take place, followed by an emulsion part. Together, they allow to achieve 1$%$ precision on the measurement of $\bar{g}$ with about 600 reconstructed and time tagged annihilations. We present here, to the best of our knowledge, the first direct measurement of antiproton annihilation in a segmented silicon sensor, the first step towards designing a position sensitive silicon detector for the AE$\mathrm{\bar{g}}$IS experiment. We also present a first comparison with Monte Carlo simulations (GEANT4) for antiproton energies below 5 MeV, Comment: 21 pages in total, 29 figures, 3 tables

Published
2013

23. Prospects for measuring the gravitational free-fall of antihydrogen with emulsion detectors

Author

AEgIS Collaboration, Aghion, S., Ahlén, O., Amsler, C., Ariga, A., Ariga, T., Belov, A. S., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Canali, C., Caravita, R., Castelli, F., Cerchiari, G., Cialdi, S., Comparat, D., Consolati, G., Derking, J. H., Di Domizio, S., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Genova, P., Giammarchi, M., Gligorova, A., Gninenko, S. N., Haider, S., Harasimovicz, J., Hogan, S. D., Huse, T., Jordan, E., Jørgensen, L. V., Kaltenbacher, T., Kawada, J., Kellerbauer, A., Kimura, M., Knecht, A., Krasnický, D., Lagomarsino, V., Magnani, A., Mariazzi, S., Matveev, V. A., Moia, F., Nebbia, G., Nédélec, P., Oberthaler, M. K., Pacifico, N., Petrácek, V., Pistillo, C., Prelz, F., Prevedelli, M., Regenfus, C., Riccardi, C., Røhne, O., Rotondi, A., Sandaker, H., Scampoli, P., Sosa, A., Storey, J., Vasquez, M. A. Subieta, Spacek, M., Testera, G., Trezzi, D., Vaccarone, R., Welsch, C. P., and Zavatarelli, S.

Subjects
Physics - Instrumentation and Detectors, High Energy Physics - Experiment
Abstract

The main goal of the AEgIS experiment at CERN is to test the weak equivalence principle for antimatter. AEgIS will measure the free-fall of an antihydrogen beam traversing a moir\'e deflectometer. The goal is to determine the gravitational acceleration g for antihydrogen with an initial relative accuracy of 1% by using an emulsion detector combined with a silicon micro-strip detector to measure the time of flight. Nuclear emulsions can measure the annihilation vertex of antihydrogen atoms with a precision of about 1 - 2 microns r.m.s. We present here results for emulsion detectors operated in vacuum using low energy antiprotons from the CERN antiproton decelerator. We compare with Monte Carlo simulations, and discuss the impact on the AEgIS project., Comment: 20 pages, 16 figures, 3 tables

Published
2013
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25. A ∼100 μm-resolution position-sensitive detector for slow positronium

Author

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., and Zurlo, N.

Published
2019
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27. AEgIS at ELENA: outlook for physics with a pulsed cold antihydrogen beam

Author

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., and Zurlo, N.

Published
2018

28. Characterization of a transmission positron/positronium converter for antihydrogen production

Author

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., and Lyckegaard, F.

Published
2017
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30. Direct detection of antiprotons with the Timepix3 in a new electrostatic selection beamline

Author

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., and Zurlo, N.

Published
2016
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31. Positron bunching and electrostatic transport system for the production and emission of dense positronium clouds into vacuum

Author

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, 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.

Published
2015
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32. AEgIS/AD-6 annual report 2023

Author

Caravita, R

Subjects
Detectors and Experimental Techniques
Abstract

AEgIS / AD-6 annual report 2022

Published
2023

33. Development of a detector for inertial sensing of positronium at AEḡIS (CERN)

Author

Glöggler, L. T., primary, Caravita, R., additional, Bergmann, B., additional, Bonomi, G., additional, Brusa, R. S., additional, Burian, P., additional, Camper, A., additional, Castelli, F., additional, Cheinet, P., additional, Comparat, D., additional, Consolati, G., additional, Doser, M., additional, Gjersdal, H., additional, Graczykowski, Ł., additional, Guatieri, F., additional, Haider, S., additional, Huck, S., additional, Janik, M., additional, Kasprowicz, G., additional, Khatri, G., additional, Kornakov, G., additional, Malbrunot, C., additional, Mariazzi, S., additional, Nebbia, G., additional, Nowak, L., additional, Nowicka, D., additional, Oswald, E., additional, Pagano, D., additional, Penasa, L., additional, Pospisil, S., additional, Povolo, L., additional, Prelz, F., additional, Rienäcker, B., additional, Røhne, O. M., additional, Sandaker, H., additional, Stekl, I., additional, Tefelski, D., additional, Tietje, I. C., additional, Volponi, M., additional, Wolz, T., additional, Zimmer, C., additional, and Zurlo, N., additional

Published
2022
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34. Control system for ion Penning traps at the AEgIS experiment at CERN

Author

Nowicka, D, primary, Bergmann, B, additional, Bonomi, G, additional, Brusa, R S, additional, Burian, P, additional, Camper, A, additional, Caravita, R, additional, Castelli, F, additional, Cheinet, P, additional, Comparat, D, additional, Consolati, G, additional, Doser, M, additional, Gjersdal, H, additional, Glöggler, L, additional, Graczykowski, Ł, additional, Guatieri, F, additional, Haider, S, additional, Huck, S, additional, Janik, M, additional, Kasprowicz, G, additional, Khatri, G, additional, Kornakov, G, additional, Malbrunot, C, additional, Mariazzi, S, additional, Nebbia, G, additional, Nowak, L, additional, Oswald, E, additional, Pagano, D, additional, Penasa, L, additional, Pospisil, S, additional, Povolo, L, additional, Prelz, F, additional, Rienäcker, B, additional, Røhne, O M, additional, Sandaker, H, additional, Stekl, I, additional, Tefelski, D, additional, Volponi, M, additional, Wolz, T, additional, Zimmer, C, additional, and Zurlo, N, additional

Published
2022
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35. Investigation of silicon sensors for their use as antiproton annihilation detectors

Author

Pacifico, N., Aghion, S., Ahlén, O., Belov, A.S., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R.S., Burghart, G., Cabaret, L., Caccia, M., Canali, C., Caravita, R., Castelli, F., Cerchiari, G., Cialdi, S., Comparat, D., Consolati, G., Da Vià, C., Derking, J.H., Di Domizio, S., Di Noto, L., Doser, M., Dudarev, A., Ferragut, R., Fontana, A., Genova, P., Giammarchi, M., Gligorova, A., Gninenko, S.N., Haider, S., Harasimowicz, J., Huse, T., Jordan, E., Jørgensen, L.V., Kaltenbacher, T., Kellerbauer, A., Knecht, A., Krasnický, D., Lagomarsino, V., Lehner, S., Magnani, A., Malbrunot, C., Mariazzi, S., Matveev, V.A., Moia, F., Nebbia, G., Nellist, C., Nédélec, P., Oberthaler, M.K., Petráček, V., Prelz, F., Prevedelli, M., Regenfus, C., Riccardi, C., Røhne, O., Rotondi, A., Sandaker, H., Sosa, A., Subieta Vasquez, M.A., Špaček, M., Testera, G., Welsch, C.P., Widmann, E., Yzombard, P., Zavatarelli, S., and Zmeskal, J.

Published
2014
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37. High-resolution MCP-TimePix3 imaging/timing detector for antimatter physics

Author

Glöggler, L, primary, Caravita, R, additional, Auzins, M, additional, Bergmann, B, additional, Brusa, R S, additional, Burian, P, additional, Camper, A, additional, Castelli, F, additional, Cheinet, P, additional, Ciuryło, R, additional, Comparat, D, additional, Consolati, G, additional, Doser, M, additional, Gjersdal, H, additional, Graczykowski, Ł, additional, Guatieri, F, additional, Haider, S, additional, Huck, S, additional, Janik, M, additional, Kasprowicz, G, additional, Khatri, G, additional, Kłosowski, Ł, additional, Kornakov, G, additional, Malbrunot, C, additional, Mariazzi, S, additional, Nowak, L, additional, Nowicka, D, additional, Oswald, E, additional, Penasa, L, additional, Piwiński, M, additional, Pospisil, S, additional, Povolo, L, additional, Prelz, F, additional, Rangwala, S A, additional, Rienäcker, B, additional, Røhne, O M, additional, Sandaker, H, additional, Sowinski, T, additional, Stekl, I, additional, Tefelski, D, additional, Volponi, M, additional, Wolz, T, additional, Zimmer, C, additional, Zawada, M, additional, and Zurlo, N, additional

Published
2022
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38. Particle tracking at 4 K: The Fast Annihilation Cryogenic Tracking (FACT) detector for the AEgIS antimatter gravity experiment

Author

Storey, J., Canali, C., Aghion, S., Ahlén, O., Amsler, C., Ariga, A., Ariga, T., Belov, A.S., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R.S., Burghart, G., Cabaret, L., Carante, M., Caravita, R., Castelli, F., Cerchiari, G., Cialdi, S., Comparat, D., Consolati, G., Dassa, L., Di Domizio, S., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Genova, P., Giammarchi, M., Gligorova, A., Gninenko, S.N., Haider, S., Hogan, S.D., Huse, T., Jordan, E., Jørgensen, L.V., Kaltenbacher, T., Kawada, J., Kellerbauer, A., Kimura, M., Knecht, A., Krasnický, D., Lagomarsino, V., Magnani, A., Mariazzi, S., Matveev, V.A., Merkt, F., Moia, F., Nebbia, G., Nédélec, P., Oberthaler, M.K., Pacifico, N., Petráček, V., Pistillo, C., Prelz, F., Prevedelli, M., Regenfus, C., Riccardi, C., Røhne, O., Rotondi, A., Sandaker, H., Scampoli, P., Subieta Vasquez, M.A., Špaček, M., Testera, G., Trezzi, D., Vaccarone, R., and Zavatarelli, S.

Published
2013
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39. Development of nuclear emulsions with [formula omitted] spatial resolution for the AEgIS experiment

Author

Kimura, M., Aghion, S., Ahlén, O., Amsler, C., Ariga, A., Ariga, T., Belov, A.S., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R.S., Burghart, G., Cabaret, L., Canali, C., Caravita, R., Castelli, F., Cerchiari, G., Cialdi, S., Comparat, D., Consolati, G., Di Domizio, S., Di Noto, L., Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Genova, P., Giammarchi, M., Gligorova, A., Gninenko, S.N., Haider, S., Hogan, S.D., Huse, T., Jordan, E., Jørgensen, L.V., Kaltenbacher, T., Kawada, J., Kellerbauer, A., Knecht, A., Krasnický, D., Lagomarsino, V., Mariazzi, S., Matveev, V.A., Merkt, F., Moia, F., Nebbia, G., Nédélec, P., Oberthaler, M.K., Pacifico, N., Petráček, V., Pistillo, C., Prelz, F., Prevedelli, M., Regenfus, C., Riccardi, C., Røhne, O., Rotondi, A., Sandaker, H., Scampoli, P., Storey, J., Subieta Vasquez, M.A., Špaček, M., Testera, G., Trezzi, D., Vaccarone, R., and Zavatarelli, S.

Published
2013
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40. The AEgIS experiment

Author

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, P., Semeria, L., Simon, M., Spacek, M., Storey, J., Strojek, I. M., Subieta, M., Widmann, E., Yzombard, P., Zavatarelli, S., Zmeskal, J., and (AEgIS Collaboration)

Published
2015
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41. Emulsion detectors for the antihydrogen detection in AEgIS

Author

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, P., Simon, M., Špaček, M., Storey, J., Strojek, I. M., Subieta, M., Testera, G., Widmann, E., Yzombard, P., Zavatarelli, S., and Zmeskal, J.

Published
2015
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43. Development of a Position-Sensitive Detector for Positronium Inertial Sensing Measurements

Author

Mariazzi, S., Caravita, R., Glöggler, L., Povolo, L., Penasa, L., Sharma, Sushil, Moskal, Paweł, and Bruda, R. S.

Subjects
positronium, antimatter, General Physics and Astronomy, spatial-sensitive detector, Detectors and Experimental Techniques
Abstract

In the last twenty years, both free fall and interferometry/deflectometry experiments have been proposed for the measurement of the gravitational acceleration on positronium, which is a purely leptonic matter-antimatter atom formed by an electron and its antiparticle (positron). Among the several challenges posed by these experiments is the development of position-sensitive detectors to measure the deflection of positronium in the Earth's gravitational field. In this work, we describe our recent progress in the development of position-sensitive detectors. Two different detection schemes are considered. The first is based on Ps ionization in a strong homogeneous magnetic field and imaging of the freed positron with a microchannel plate. The second scheme is based on scanning the positronium atom distribution on a plane by moving the slit or a material grating with sub-nm accuracy, and counting the atoms crossing the obstacle and those annihilating on it. The possibility of reaching a spatial resolution of around 15 μm using the former detection scheme is shown, and preliminary steps towards the development of a detector following the latter scheme (with potential position sensitivity in the sub-nm range) are described.

Published
2022

44. Development of a detector for inertial sensing of positronium at AEgIS (CERN)

Author

Glöggler, Lisa T., Caravita, R., Bergmann, B., Bonomi, G., Brusa, R. S., Burian, P., Camper, A., Castelli, F., Cheinet, P., Comparat, D., Consolati, G., Doser, M., Gjersdal, H., Graczykowski, Ł., Guatieri, F., Haider, S., Huck, S., Janik, M., Kasprowicz, G., Khatri, G., Kornakov, G., Malbrunot, C., Mariazzi, S., Nebbia, G., Nowak, L., Nowicka, D., Oswald, E., Pagano, D., Penasa, L., Pospisil, S., Povolo, L., Prelz, F., Rienäcker, B., Røhne, O. M., Sandaker, H., Stekl, I., Tefelski, D., Tietje, I. C., Volponi, M., Wolz, T., Zimmer, C., and Zurlo, N.

Subjects
History, detector, CERN, positronium, Detectors and Experimental Techniques, 530 Physik, AEḡIS, gravitational acceleration, Computer Science Applications, Education
Abstract

The primary goal of the AEgIS collaboration at CERN is to measure the gravitational acceleration on neutral antimatter. Positronium (Ps), the bound state of an electron and a positron, is a suitable candidate for a force-sensitive inertial measurement by means of deflectometry/interferometry. In order to conduct such an experiment, the impact position and time of arrival of Ps atoms at the detector must be detected simultaneously. The detection of a low-velocity Ps beam with a spatial resolution of (88 ± 5) μm was previously demonstrated [1]. Based on the methodology employed in [1] and [2], a hybrid imaging/timing detector with increased spatial resolution of about 10 μm was developed. The performance of a prototype was tested with a positron beam. The concept of the detector and first results are presented.

Published
2022

45. Experiments with mid-heavy antiprotonic atoms in AE$\overline{g}$IS

Author

Kornakov, G, Auzins, M, Bergmann, B, Burian, P, Bonomi, G, Brusa, R S, Camper, A, Caravita, R, Castelli, F, Cheinet, P, Ciuryło, R, Comparat, D, Consolati, G, Doser, M, Gjersdal, H, Glöggler, L T, Graczykowsk, Ł, Guatieri, F, Haider, S, Huck, S, Janik, M, Kasprowicz, G, Khatri, G, Kłosowski, Ł, Lappo, L, Malbrunot, C, Mariazzi, S, Nebbia, G, Nowak, L, Nowicka, D, Oswald, E, Pagano, D, Penasa, L, Petracek, V, Piwiński, M, Pospisil, S, Povolo, L, Prelz, F, Rangwala, S, Rienäcker, B, Rotondi, A, Røhne, O M, Sandaker, H, Stekl, I, Tefelski, D, Tietje, I C, Volponi, M, Wolz, T, Zawada, M, Zimmer, C, and Zurlo, N

Subjects
Nuclear Physics - Experiment
Abstract

ments which provide the most precise data on the strong interaction between protons and antiprotons and of the neutron skin of many nuclei thanks to the clean annihilation signal. In most of these experiments, the capture process of low energy antiprotons was done in a dense target leading to a significant suppression of specific transitions between deeply bound levels that are of particular interest. In particular, precise measurements of specific transitions in antiprotonic atoms with Z>2 are sparse. We propose to use the pulsed production scheme developed for antihydrogen and protonium for the formation of cold antiprotonic atoms. This technique has been recently achieved experimentally for the production of antihydrogen at AE$\overline{\rm g}$IS. The proposed experiments will have sub-ns synchronization thanks to an improved control and acquisition system. The formation in vacuum guarantees the absence of Stark mixing or annihilation from high n states and together with the sub-ns synchronization would resolve the previous experimental limitations. It will be possible to access the whole chain of the evolution of the system from its formation until annihilation with significantly improved signal-to-background ratio.

Published
2022

46. Pulsed Production of Antihydrogen in AEgIS

Author

Zurlo, N., Amsler, C., Antonello, M., Belov, A., Bonomi, G., Brusa, R. S., Caccia, M., Camper, A., Caravita, R., Castelli, F., Cheinet, P., Comparat, D., Consolati, G., Demetrio, A., Di Noto, L., Doser, M., Fani, 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., Mariazzi, S., Matveev, V., Muller, R., Nebbia, G., Nedelec, P., Nowak, L., 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., Yzombard, P., and Zimmer, C.

Subjects
Antihydrogen, antiprotons, Accelerators and Storage Rings, Antihydrogen, antiprotons
Abstract

Cold antihydrogen atoms are a powerful tool to probe the validity of fundamental physics laws, and it's clear that colder atoms, generally speaking, allow an increased level of precision. After the first production of cold antihydrogen ($\bar{H}$) in 2002, experimental efforts have progressed continuously (trapping, beam formation, spectroscopy), with competitive results already achieved by adapting to cold antiatoms techniques previously well developed for ordinary atoms. Unfortunately, the number of $\bar{H}$ atoms that can be produced in dedicated experiments is many orders of magnitude smaller than available hydrogen atoms, which are at hand in large amount, so the development of novel techniques that allow the production of $\bar{H}$ with well defined conditions (and possibly control its formation time and energy levels) is essential to improve the sensitivity of the methods applied by the different experiments. We present here the first experimental results concerning the production of $\bar{H}$ in a pulsed mode where the time when 90\% of the atoms are produced is known with an uncertainty of around 250~ns. The pulsed $\bar{H}$ source is generated by the charge-exchange reaction between Rydberg positronium atoms ($Ps$) and trapped antiprotons ($\bar{p}$), cooled and manipulated in an electromagnetic trap: $$ \bar{ p}+Ps^* \rightarrow \bar{H}^* + e^- $$ where Rydberg positronium atoms, in turn, are produced through the implantation of a pulsed positron beam into a mesoporous silica target, and are excited by two subsequent laser pulses, the first to $n=3$, the second to the needed Rydberg level ($n \simeq 17$). The pulsed production allows the control of the antihydrogen temperature, and facilitates the tunability of the Rydberg states, their de-excitation by pulsed lasers and the manipulation through electric field gradients. In fact, the production of pulsed antihydrogen is a major milestone in the AEgIS experiment to perform direct measurements of the validity of the Weak Equivalence Principle for antimatter.

Published
2022

47. The AEgIS Experiment: Measuring the Gravitational Interaction of Antimatter

Author

Knecht, A., Aghion, S., Ahlén, O., Amsler, C., Ariga, A., Ariga, T., Belov, A. S., Bonomi, G., Bräunig, P., Bremer, J., Brusa, R. S., Cabaret, L., Canali, C., Caravita, R., Castelli, F., Cerchiari, G., Cialdi, S., Comparat, D., Consolati, G., Derking, J. H., Domizio, S. Di, Noto, L. Di, Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Genova, P., Giammarchi, M., Gligorova, A., Gninenko, S. N., Haider, S., Hogan, S. D., Huse, T., Jordan, E., Jørgensen, L. V., Kaltenbacher, T., Kawada, J., Kellerbauer, A., Kimura, M., Krasnický, D., Lagomarsino, V., Lehner, S., Malbrunot, C., Mariazzi, S., Matveev, V. A., Merkt, F., Moia, F., Nebbia, G., Nédélec, P., Oberthaler, M. K., Pacifico, N., Petráček, V., Pistillo, C., Prelz, F., Prevedelli, M., Regenfus, C., Riccardi, C., Røhne, O., Rotondi, A., Sandaker, H., Scampoli, P., Storey, J., Subieta Vasquez, M. A., Špaček, M., Testera, G., Trezzi, D., Vaccarone, R., Widmann, E., Zavatarelli, S., and Zmeskal, J.

Published
2014
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48. Measuring the gravitational free-fall of antihydrogen

Author

Storey, J., Aghion, S., Ahlén, O., Amsler, C., Ariga, A., Ariga, T., Belov, A. S., Bonomi, G., Bräunig, P., Bremer, J., S. Brusa, R., Cabaret, L., Canali, C., Caravita, R., Castelli, F., Cerchiari, G., Cialdi, S., Comparat, D., Consolati, G., Derking, J. H., Domizio, S. Di, Noto, L. Di, Doser, M., Dudarev, A., Ereditato, A., Ferragut, R., Fontana, A., Genova, P., Giammarchi, M., Gligorova, A., Gninenko, S. N., Haider, S., Hogan, S. D., Huse, T., Jordan, E., Jørgensen, L. V., Kaltenbacher, T., Kawada, J., Kellerbauer, A., Kimura, M., Knecht, A., Krasnický, D., Lagomarsino, V., Lehner, S., Malbrunot, C., Mariazzi, S., Matveev, V. A., Merkt, F., Moia, F., Nebbia, G., Nédélec, P., Oberthaler, M. K., Pacifico, N., Petráček, V., Pistillo, C., Prelz, F., Prevedelli, M., Regenfus, C., Riccardi, C., Røhne, O., Rotondi, A., Sandaker, H., Scampoli, P., Subieta Vasquez, M. A., Špaček, M., Testera, G., Trezzi, D., Vaccarone, R., Widmann, E., Zavatarelli, S., and Zmeskal, J.

Published
2014
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49. AEg̅IS latest results

Author

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.

Subjects
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

Published
2018
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50. Towards the first measurement of matter-antimatter gravitational interaction

Author

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.

Subjects
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.

Published
2018
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