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8 results on '"H. Bräuninger"'

1. The cern axion solar telescope (CAST): an update

Author

J. M. Carmona, Thomas Papaevangelou, S. Aune, A. Liolios, M.L. Sarsa, A. Ortiz de Solórzano, Y. Semertzidis, J. Engelhauser, José Villar, R. Kotthaus, F. T. Avignone, B. Beltrán, Milica Krčmar, J. P. Robert, Dieter H. H. Hoffmann, R. J. Creswick, J. Morales, Louis Walckiers, M. Delattre, A. Placci, W. Serber, A. Nikolaidis, Markus Kuster, K. Barth, G. Luzón, V. Arsov, D. Kang, A. Delbart, J. Franz, R. Hartmann, Ante Ljubičić, Efrain J. Ferrer, Georg G. Raffelt, Joachim Jacoby, Perikles Rammos, H. Bräuninger, F. H. Heinsius, J. N. Joux, Georgios Fanourakis, T. Geralis, A. Lippitsch, T. Aune, I. Giomataris, H. Fischer, C. Eleftheriadis, J. I. Collar, N. Golubev, E. Chesi, C. Lasseur, B. Vullierme, R. Deoliveira, M. Mutterer, M. D. Hasinoff, T. Dafni, S. Cebrián, H. A. Farach, Joaquin Vieira, A. Belov, G. Cipolla, I. G. Irastorza, M. Davenport, Gerhard Lutz, S. N. Gninenko, S. Dedousis, C. Schill, J. Ruz, Peter Friedrich, F. Formenti, Konstantin Zioutas, S. Andriamonje, K. Königsmann, A. Morales, Biljana Lakić, and L. DiLella

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, Magnet, Sunrise, Astrophysics, Sunset, CERN Axion Solar Telescope, Axion, Upper and lower bounds, Atomic and Molecular Physics, and Optics
Abstract

The CERN Axion Solar Telescope (CAST), a 10 meter long LHC, 9 Tesla, test magnet is mounted on a moving platform that tracks the sun about 1.5 hours during sunrise, again during sunset. It moves ±8 0 vertically and ±40 0 horizontally. It has been taking data continuously since July 10, 2003. Data analyzed thus far yield an upper bound on the photon-axion coupling constant, g aγγ ⩽ 3 × 10 −10 GeV −1 for axion masses less than 5 × 10 −2 eV.

Published
2005
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2. An improved limit on the axion-photon coupling from the CAST experiment

Author

Ioannis Giomataris, Ante Ljubičić, S. Gninenko, L. Stewart, H. Bräuninger, M. Davenport, Gerhard Lutz, Jakob Englhauser, Milica Krčmar, B. Beltrán, J.A. Villar, J. I. Collar, David Miller, L. Di Lella, A. Placci, J. M. Carmona, I. G. Irastorza, Markus Kuster, C. Lasseur, Krešimir Jakovčić, A. Ortiz, Konstantinos Kousouris, C. Eleftheriadis, S. Cebrián, E. Ferrer Ribas, A. Liolios, J. Jacoby, H. Fischer, Theodoros Geralis, D. Autiero, I. Savvidis, Yannis K. Semertzidis, Julia Vogel, M. D. Hasinoff, F.H. Heinsius, G. Luzón, T. Papaevangelou, Joaquin Vieira, Hector Gomez, J. Morales, J. Ruz, S. Andriamonje, R. Kotthaus, K. Barth, Pasquale D. Serpico, L. Walckiers, H. Riege, A Rodríguez, S. Aune, K. Königsmann, J. Franz, G. Fanourakis, T. Dafni, Dieter H. H. Hoffmann, Georg G. Raffelt, A. Belov, Peter Friedrich, Konstantin Zioutas, D. Kang, Biljana Lakić, and A. Morales

Subjects
Particle physics, Photon, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, Astrophysics::Solar and Stellar Astrophysics, 010306 general physics, Axion, Physics, Coupling, Helioscope, 010308 nuclear & particles physics, Axion Dark Matter Experiment, Astrophysics (astro-ph), High Energy Physics::Phenomenology, Astronomy and Astrophysics, Stars, Globular cluster, Physics::Space Physics, Astrophysics::Earth and Planetary Astrophysics, axions, magnetic fields, CERN Axion Solar Telescope, Particle Physics - Experiment
Abstract

We have searched for solar axions or similar particles that couple to two photons by using the CERN Axion Solar Telescope (CAST) setup with improved conditions in all detectors. From the absence of excess X-rays when the magnet was pointing to the Sun, we set an upper limit on the axion-photon coupling of 8.8 x 10^{-11} GeV^{-1} at 95% CL for m_a, Comment: 24 pages, 8 figures, 1 table, to be submitted to JCAP; v2: minor changes in the exclusion plot; v3: minor changes to match accepted version

Published
2007

3. Prospects for the CERN Axion Solar Telescope sensitivity to 14.4 keV axions

Author

José Villar, A. Liolios, L. Di Lella, Thomas Papaevangelou, H. Riege, J. Franz, G. Fanourakis, Joachim Jacoby, Milica Krčmar, A. Morales, Ante Ljubičić, S. Andriamonje, J. M. Carmona, Pasquale D. Serpico, E. Ferrer Ribas, T. Dafni, Theodoros Geralis, L. Stewart, Y. Semertzidis, Julia Vogel, Biljana Lakić, K. Barth, G. Luzón, S. Cebrián, F. T. Avignone, B. Beltrán, Krešimir Jakovčić, A. Placci, Konstantinos Kousouris, Georg G. Raffelt, H. Fischer, A. Belov, K. Königsmann, M. D. Hasinoff, J. I. Collar, C. Lasseur, H. Bräuninger, J. Morales, David Miller, C. Eleftheriadis, Louis Walckiers, Markus Kuster, J. Ruz, Peter Friedrich, Konstantin Zioutas, S. Aune, Dieter H. H. Hoffmann, I. G. Irastorza, M. Davenport, Gerhard Lutz, Ioannis Giomataris, Joaquin Vieira, D. Kang, R. Kotthaus, F.H. Heinsius, A. Ortiz, and S. N. Gninenko

Subjects
Astrophysics and Astronomy, Nuclear and High Energy Physics, Particle physics, Physics::Instrumentation and Detectors, Dark matter, FOS: Physical sciences, Astrophysics, 01 natural sciences, Nuclear physics, High Energy Physics::Theory, solar axions, axion-photon coupling, axion-nucleon coupling, dark matter, 0103 physical sciences, Nuclide, 010306 general physics, Nuclear Experiment, Instrumentation, Axion, Physics, Large Hadron Collider, 010308 nuclear & particles physics, Axion Dark Matter Experiment, Astrophysics (astro-ph), High Energy Physics::Phenomenology, Excited state, Ground state, CERN Axion Solar Telescope
Abstract

The CERN Axion Solar Telescope (CAST) is searching for solar axions using the 9.0 T strong and 9.26 m long transverse magnetic field of a twin aperture LHC test magnet, where axions could be converted into X-rays via reverse Primakoff process. Here we explore the potential of CAST to search for 14.4 keV axions that could be emitted from the Sun in M1 nuclear transition between the first, thermally excited state, and the ground state of 57Fe nuclide. Calculations of the expected signals, with respect to the axion-photon coupling, axion-nucleon coupling and axion mass, are presented in comparison with the experimental sensitivity., Comment: 4 pages, 1 figure. Submitted to Nucl. Instr. and Meth. A

Published
2007

4. First results from the CERN axion solar telescope

Author

Theodoros Geralis, M. Davenport, D. Kang, A. Nikolaidis, N. Goloubev, Gerhard Lutz, K. Königsmann, K. Kousouris, Peter Friedrich, Konstantin Zioutas, Biljana Lakić, L. Di Lella, G. Luzón, F.H. Heinsius, J. Morales, M. D. Hasinoff, Jakob Englhauser, C. Eleftheriadis, Georg G. Raffelt, E. Chesi, J. I. Collar, T. Papaevangelou, J. Jacoby, S. Andriamonje, A. Ortiz, H. A. Farach, T. Dafni, D. Autiero, Markus Kuster, J. Ruz, S. Cebrián, Yannis K. Semertzidis, R. J. Creswick, K. Barth, A. Morales, F. T. Avignone, H. Bräuninger, H. Riege, B. Beltrán, Pasquale D. Serpico, David Miller, A. Placci, J. M. Carmona, A. Belov, L. Stewart, R. Kotthaus, J. Franz, G. Fanourakis, I. Savvidis, L. Walckiers, H. Fischer, C. Lasseur, Efrain J. Ferrer, Milica Krčmar, J.A. Villar, Ante Ljubičić, A. Liolios, Joaquin Vieira, I. G. Irastorza, Ioannis Giomataris, M. Mutterer, M.L. Sarsa, W. Serber, S. Aune, Dieter H. H. Hoffmann, K. Zachariadou, V. Arsov, and S. Gninenko

Subjects
Physics, Particle physics, Helioscope, PVLAS, Large Hadron Collider, 010308 nuclear & particles physics, Physics::Instrumentation and Detectors, Dark matter, Astrophysics (astro-ph), High Energy Physics::Phenomenology, General Physics and Astronomy, axions, solar telescope, LHC, FOS: Physical sciences, Astrophysics, Coupling (probability), 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), 0103 physical sciences, 010306 general physics, CERN Axion Solar Telescope, Axion, Primakoff effect, Particle Physics - Experiment
Abstract

Hypothetical axion-like particles with a two-photon interaction would be produced in the Sun by the Primakoff process. In a laboratory magnetic field (``axion helioscope'') they would be transformed into X-rays with energies of a few keV. Using a decommissioned LHC test magnet, CAST has been running for about 6 months during 2003. The first results from the analysis of these data are presented here. No signal above background was observed, implying an upper limit to the axion-photon coupling < 1.16 10^{-10} GeV^-1 at 95% CL for m_a, Comment: 4 pages, accepted by PRL. Final version after the referees comments

Published
2004

5. Axion searches at CERN with the CAST Telescope

Author

J. I. Collar, M.L. Sarsa, R. Kotthaus, B. Vullierme, E. Arik, D. Kang, Gerhard Lutz, A. Nikolaidis, V. Vasileiou, J. M. Carmona, Markus Kuster, R. De Oliveira, Dieter Hoffmann, S. Cebrián, Serkant Ali Cetin, S. Andriamonje, T. Dafni, A. Placci, K. Zachariadou, F. Formenti, K. Barth, D. Autiero, I. G. Irastorza, Konstantin Zioutas, A. Liolios, G. Fanourakis, F. T. Avignone, H.A. Farach, I. Savvidis, E. Chesi, Ante Ljubičić, Richard J. Creswick, Harry S. Miley, A. Delbart, Milica Krčmar, R. Hartmann, H. Riege, J. Jacoby, J.A. Villar, C. Spano, R. Schopper, S. N. Gninenko, M. Mutterer, Georg G. Raffelt, H. Bräuninger, A. Ortiz, C. Eleftheriadis, I. Giomataris, S. Dedoussis, E. Bingol, Thomas Papaevangelou, H. Fischer, G. Cipolla, Theodoros Geralis, I. Semertzidis, G. Luzón, M. D. Hasinoff, N. Goloubev, J. Morales, L. Walckiers, K. Koenigsmann, R.L. Brodzinski, M. Davenport, L. Di Lella, Biljana Lakić, A. Morales, Flores, Sylvie, 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)

Subjects
Physics, Astrophysics and Astronomy, Large Hadron Collider, Physics::Instrumentation and Detectors, Astrophysics (astro-ph), High Energy Physics::Phenomenology, FOS: Physical sciences, Astronomy, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 7. Clean energy, law.invention, Telescope, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], High Energy Physics::Theory, 13. Climate action, law, [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Astrophysics::Solar and Stellar Astrophysics, Axion
Abstract

The CERN Axion Solar Telescope (CAST) searches for axions coming from photon to axion conversion in the sun's core, as stated by the Primakoff effect. Axions arise in particle physics as a consequence of the breaking of Peccei-Quinn symmetry which has been introduced as a solution to the strong CP problem. As cosmological axions they are candidates for at least some part of cold Dark Matter.They are also expected to be produced copiously in stellar interiors with energies as high as the thermal photons undergoing photon to axion conversion. In our sun the axion energy spectrum peaks at about 4.4 keV, extending up to 10 keV. CAST collected preliminary data in 2002 and data taking with its full capability will start in the beginning of 2003., NEB-X Conference on "New Developments in Gravity", May 30-June 2, 2002, Chalkidiki, GREECE. 5 pages, 2 figures

Published
2003

6. The x-ray telescope of CAST

Author

J. Morales, D. Kang, C. Lasseur, Peter Friedrich, H. Fischer, Konstantin Zioutas, Julia Vogel, G. Hoffmeister, J. N. Joux, Dieter H. H. Hoffmann, Lothar Strüder, T. Papaevangelou, R. Hartmann, H. Bräuninger, K. Königsmann, M. Davenport, Gerhard Lutz, Jakob Englhauser, S. Cebrián, R. Kotthaus, C. Elefteriadis, A Rodríguez, Markus Kuster, J. Franz, A. Lippitsch, and F.H. Heinsius

Subjects
Coupling constant, Physics, Helioscope, Physics - Instrumentation and Detectors, Photon, Physics::Instrumentation and Detectors, Astrophysics (astro-ph), Other Fields of Physics, FOS: Physical sciences, General Physics and Astronomy, X-ray telescope, Instrumentation and Detectors (physics.ins-det), Astrophysics, High Energy Physics - Experiment, law.invention, Telescope, High Energy Physics - Experiment (hep-ex), law, CERN Axion Solar Telescope, Axion, Primakoff effect
Abstract

The Cern Axion Solar Telescope (CAST) is in operation and taking data since 2003. The main objective of the CAST experiment is to search for a hypothetical pseudoscalar boson, the axion, which might be produced in the core of the sun. The basic physics process CAST is based on is the time inverted Primakoff effect, by which an axion can be converted into a detectable photon in an external electromagnetic field. The resulting X-ray photons are expected to be thermally distributed between 1 and 7 keV. The most sensitive detector system of CAST is a pn-CCD detector combined with a Wolter I type X-ray mirror system. With the X-ray telescope of CAST a background reduction of more than 2 orders off magnitude is achieved, such that for the first time the axion photon coupling constant g_agg can be probed beyond the best astrophysical constraints g_agg < 1 x 10^-10 GeV^-1., 19 pages, 25 figures and images, replaced by the revised version accepted for publication in New Journal of Physics

Published
2007
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7. EUV and soft X-ray images of the sun on March 11th, 1971

Author

H. J. Einighammer, G. Krämer, H. Bräuninger, D. H. Höhn, U. Mayer, G. Möllenstedt, M. Mozer, H. Koops, J. Feitzinger, and H. H. Fink

Subjects
Physics, Soft x ray, Space and Planetary Science, Extreme ultraviolet lithography, Photography, Astronomy, Astronomy and Astrophysics, Astrophysics, Ultraviolet radiation
Published
1971
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8. The ROSAT Mission

Author

B. Aschenbach, H. Bräuninger, U. Briel, W. Brinkmann, H. Fink, N. Heinecke, H. Hippmann, G. Kettenring, G. Metzner, A. Ondrusch, E. Pfeffermann, P. Predehl, G. Reger, K.-H. Stephan, J. Trümper, and H. U. Zimmermann

Subjects
Physics, X-ray astronomy, Einstein Telescope, media_common.quotation_subject, Astronomy, X-ray telescope, Astrophysics, law.invention, Telescope, Sky, law, Orders of magnitude (luminous flux), ROSAT, Large Magellanic Cloud, media_common
Abstract

The primary scientific objective of the ROSAT mission is to perform the first all sky survey with an imaging X-ray telescope leading to an improvement in sensitivity by several orders of magnitude compared with previous surveys. Consequently a large number of new sources (> 105) will be discovered and located with an accuracy of 1 arcmin. After completion of the survey which will take about half a year the instrument will be used for detailed observations of selected targets.

Published
1981
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