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9 results on '"H. Bräuninger"'

1. Search for Dark Matter Axions with CAST-CAPP

Author

C. M. Adair, K. Altenmüller, V. Anastassopoulos, S. Arguedas Cuendis, J. Baier, K. Barth, A. Belov, D. Bozicevic, H. Bräuninger, G. Cantatore, F. Caspers, J. F. Castel, S. A. Çetin, W. Chung, H. Choi, J. Choi, T. Dafni, M. Davenport, A. Dermenev, K. Desch, B. Döbrich, H. Fischer, W. Funk, J. Galan, A. Gardikiotis, S. Gninenko, J. Golm, M. D. Hasinoff, D. H. H. Hoffmann, D. Díez Ibáñez, I. G. Irastorza, K. Jakovčić, J. Kaminski, M. Karuza, C. Krieger, Ç. Kutlu, B. Lakić, J. M. Laurent, J. Lee, S. Lee, G. Luzón, C. Malbrunot, C. Margalejo, M. Maroudas, L. Miceli, H. Mirallas, L. Obis, A. Özbey, K. Özbozduman, M. J. Pivovaroff, M. Rosu, J. Ruz, E. Ruiz-Chóliz, S. Schmidt, M. Schumann, Y. K. Semertzidis, S. K. Solanki, L. Stewart, I. Tsagris, T. Vafeiadis, J. K. Vogel, M. Vretenar, S. Youn, K. Zioutas, İstinye Üniversitesi, Cetin, Serkant Ali, Ozbey, Aydın, Ozbozduman, Kaan, AGF-0147-2022, V-1388-2017, and GGI-6418-2022

Subjects
High Energy Physics - Experiment (hep-ex), Multidisciplinary, Physics - Instrumentation and Detectors, General Physics and Astronomy, FOS: Physical sciences, General Chemistry, Instrumentation and Detectors (physics.ins-det), General Biochemistry, Genetics and Molecular Biology, Particle Physics - Experiment, High Energy Physics - Experiment
Abstract

The CAST-CAPP axion haloscope, operating at CERN inside the CAST dipole magnet, has searched for axions in the 19.74 $\mu$eV to 22.47 $\mu$eV mass range. The detection concept follows the Sikivie haloscope principle, where Dark Matter axions convert into photons within a resonator immersed in a magnetic field. The CAST-CAPP resonator is an array of four individual rectangular cavities inserted in a strong dipole magnet, phase-matched to maximize the detection sensitivity. Here we report on the data acquired for 4124 h from 2019 to 2021. Each cavity is equipped with a fast frequency tuning mechanism of 10 MHz/min between 4.774 GHz and 5.434 GHz. In the present work, we exclude axion-photon couplings for virialized galactic axions down to $g_{a{\gamma}{\gamma}} = 8 \times {10^{-14}}$ $GeV^{-1}$ at the 90% confidence level. The here implemented phase-matching technique also allows for future large-scale upgrades., Comment: 24 pages, 5 figures, Published version available with Open Access at https://www.nature.com/articles/s41467-022-33913-6

Published
2022

2. First Results on the Search for Chameleons with the KWISP Detector at CAST

Author

C. Krieger, Sami K. Solanki, K. Barth, B. Döbrich, S. Neff, Michael J. Pivovaroff, J. Castel, A. Belov, I. Tsagris, E. Ruiz Chóliz, Marc Schumann, A. Ozbey, A. V. Dermenev, A. Bayirli, L. Stewart, S. C. Yildiz, J. Ruz, J. G. Garza, L. Miceli, Serkant Ali Cetin, S. Arguedas Cuendis, T. Dafni, Giovanni Cantatore, J. M. Laurent, F.J. Iguaz, T. Vafeiadis, J. M. Carmona, Klaus Kurt Desch, I. G. Irastorza, M. Maroudas, M. D. Hasinoff, S. N. Gninenko, Biljana Lakić, I. Ortega, H. Bräuninger, M. Vretenar, Konstantin Zioutas, Søren Schmidt, Marin Karuza, Sebastian Baum, Julia Vogel, G. Luzón, A. Gardikiotis, Yannis K. Semertzidis, J. Baier, M. Davenport, Krešimir Jakovčić, M. Rosu, H. Fischer, Wolfgang Funk, J. A. García, Dieter Hoffmann, J. Kaminski, Arguedas Cuendis, S., Baier, J., Barth, K., Baum, S., Bayirli, A., Belov, A., Brauninger, H., Cantatore, G., Carmona, J. M., Castel, J. F., Cetin, S. A., Dafni, T., Davenport, M., Dermenev, A., Desch, K., Dobrich, B., Fischer, H., Funk, W., Garcia, J. A., Gardikiotis, A., Garza, J. G., Gninenko, S., Hasinoff, M. D., Hoffmann, D. H. H., Iguaz, F. J., Irastorza, I. G., Jakovcic, K., Kaminski, J., Karuza, M., Krieger, C., Lakic, B., Laurent, J. M., Luzon, G., Maroudas, M., Miceli, L., Neff, S., Ortega, I., Ozbey, A., Pivovaroff, M. J., Rosu, M., Ruz, J., Choliz, E. R., Schmidt, S., Schumann, M., Semertzidis, Y. K., Solanki, S. K., Stewart, L., Tsagris, I., Vafeiadis, T., Vogel, J. K., Vretenar, M., Yildiz, S. C., Zioutas, K., and İÜC

Subjects
Astrophysics and Astronomy, Physics - Instrumentation and Detectors, Photon, Cosmology and Nongalactic Astrophysics (astro-ph.CO), astro-ph.SR, Physics::Instrumentation and Detectors, Chameleons, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, law.invention, Telescope, High Energy Physics - Experiment (hep-ex), Optics, law, Opto-mechanical sensor, 0103 physical sciences, Chameleon, Dark energy, Detectors and Experimental Techniques, 010306 general physics, chameleons, dark energy, opto-mechanical sensor, interferometry, Axion, physics.ins-det, Solar and Stellar Astrophysics (astro-ph.SR), Physics, Coupling, 010308 nuclear & particles physics, business.industry, hep-ex, Detector, Michelson interferometer, Astronomy and Astrophysics, Instrumentation and Detectors (physics.ins-det), Interferometry, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, astro-ph.CO, Direct coupling, business, Particle Physics - Experiment, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We report on a first measurement with a sensitive opto-mechanical force sensor designed for the direct detection of coupling of real chameleons to matter. These dark energy candidates could be produced in the Sun and stream unimpeded to Earth. The KWISP detector installed on the CAST axion search experiment at CERN looks for tiny displacements of a thin membrane caused by the mechanical effect of solar chameleons. The displacements are detected by a Michelson interferometer with a homodyne readout scheme. The sensor benefits from the focusing action of the ABRIXAS X-ray telescope installed at CAST, which increases the chameleon flux on the membrane. A mechanical chopper placed between the telescope output and the detector modulates the incoming chameleon stream. We present the results of the solar chameleon measurements taken at CAST in July 2017, setting an upper bound on the force acting on the membrane of $80$~pN at 95\% confidence level. The detector is sensitive for direct coupling to matter $10^4 \leq\beta_m \leq 10^8$, where the coupling to photons is locally bound to $\beta_\gamma \leq 10^{11}$., Comment: 21 pages, 12 figures

Published
2019

3. Search for solar axion emission from 7Li and D(p,gamma)3He nuclear decays with the CAST gamma-ray calorimeter

Author

CAST collaboration, S Andriamonje, S Aune, D Autiero, K Barth, A Belov, B Beltrán, H Bräuninger, J.M Carmona, S Cebrián, J.I Collar, T Dafni, M Davenport, L. Di Lella, C Eleftheriadis, J Englhauser, G Fanourakis, E Ferrer-Ribas, H Fischer, J Franz, P Friedrich, T Geralis, I Giomataris, S Gninenko, H Gómez, M Hasinoff, F.H Heinsius, D.H.H Hoffmann, I.G Irastorza, J Jacoby, K Jakovcić, D Kang, K Königsmann, R Kotthaus, M Krcmar, K Kousouris, M Kuster, B Lakić, C Lasseur, A Liolios, A Ljubicić, G Lutz, G Luzón, D.W Miller, J Morales, A Ortiz, T Papaevangelou, A Placci, G Raffelt, H Riege, A Rodríguez, J Ruz, I Savvidis, Y Semertzidis, P Serpico, L Stewart, J. D Vieira, J Villar, J Vogel, L Walckiers, K Zioutas, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, 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), 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)

Subjects
Particle physics, Astrophysics::High Energy Astrophysical Phenomena, Hadron, Nuclear Theory, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Solar core, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Nuclear Experiment, Axion, Physics, Helioscope, Calorimeter (particle physics), 010308 nuclear & particles physics, hep-ex, High Energy Physics::Phenomenology, Gamma ray, axions, axion-photon coupling, axion-nucleon coupling, hadronic axions, Astronomy and Astrophysics, Pseudoscalar, Nucleon
Abstract

We present the results of a search for a high-energy axion emission signal from 7Li (0.478 MeV) and D(p,gamma)3He (5.5 MeV) nuclear transitions using a low-background gamma-ray calorimeter during Phase I of the CAST experiment. These so-called "hadronic axions" could provide a solution to the long-standing strong-CP problem and can be emitted from the solar core from nuclear M1 transitions. This is the first such search for high-energy pseudoscalar bosons with couplings to nucleons conducted using a helioscope approach. No excess signal above background was found., 20 pages, 8 figures, final version to be published in JCAP

Published
2010
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4. 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

5. 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

6. 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

7. 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

8. 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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9. Search for low Energy solar Axions with CAST

Author

Cantatore, Giovanni, Arik, E., Aune, S., Autiero, D., Barth, K., Belov, A., Beltr��n, B., Borghi, S., Boydag, F. S., Br��uninger, H., Cantatore, G., Carmona, J. M., Cebri��n, S., Cetin, S. A., Collar, J. I., Dafni, T., Davenport, M., Di Lella, L., Dogan, O. B., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Fischer, H., Franz, J., Gal��n, J., Gazis, E., Geralis, T., Giomataris, I., Gninenko, S., G��mez, H., Hasinoff, M., Heinsius, F. H., Hikmet, I., Hoffmann, D. H. H., Irastorza, I. G., Jacoby, J., Jakov��i��, K., Kang, D., Karageorgopoulou, T., Karuza, M., K��nigsmann, K., Kotthaus, R., Kr��mar, M., Kousouris, K., Kuster, M., Laki��, B., Lasseur, C., Liolios, A., Ljubi��i��, A., Lozza, V., Lutz, G., Luz��n, G., Miller, D., Morales, A., {Deceased}, Morales, J., Niinikoski, T., Nordt, A., Ortiz, A., Papaevangelou, T., Pivovaroff, M., Placci, A., Raiteri, G., Raffelt, G., Riege, H., Rodr��guez, A., Ruz, J., Savvidis, I., Semertzidis, Y., Serpico, P., Solanki, S. K., Soufli, R., Stewart, L., Tsagri, M., van Bibber, K., Villar, J., Vogel, J., Walckiers, L., Zioutas, K., Lindner a., Redondo J., Ringwald A., Cantatore, Giovanni, FOR THE CAST COLLABORATION E., Arik, S., Aune, D., Autiero, K., Barth, A., Belov, B., Beltrán, S., Borghi, F. S., Boydag, H., Bräuninger, Cantatore, G., J. M., Carmona, S., Cebrián, S. A., Cetin, J. I., Collar, T., Dafni, M., Davenport, L., DI LELLA, O. B., Dogan, C., Eleftheriadi, N., Elia, G., Fanouraki, E., FERRER RIBAS, H., Fischer, J., Franz, J., Galán, E., Gazi, T., Gerali, I., Giomatari, S., Gninenko, H., Gómez, M., Hasinoff, F. H., Heinsiu, I., Hikmet, D. H. H., Hoffmann, I. G., Irastorza, J., Jacoby, K., Jakoväiä, D., Kang, T., Karageorgopoulou, M., Karuza, K., Königsmann, R., Kotthau, M., Krämar, K., Kousouri, M., Kuster, B., Lakiä, C., Lasseur, A., Liolio, A., Ljubiäiä, V., Lozza, G., Lutz, G., Luzón, D., Miller, A., Morale, Deceased, J., Morale, T., Niinikoski, A., Nordt, A., Ortiz, T., Papaevangelou, M., Pivovaroff, A., Placci, G., Raiteri, G., Raffelt, H., Riege, A., Rodríguez, J., Ruz, I., Savvidi, Y., Semertzidi, P., Serpico, S. K., Solanki, R., Soufli, L., Stewart, M., Tsagri, K., VAN BIBBER, J., Villar, J., Vogel, L., Walckier, and K., Zioutas

Subjects
WISPs, WISP, detector, Physics::Instrumentation and Detectors, Axions, Physics, FOS: Physical sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Axion, detectors, solar physics, Particle Physics - Experiment
Abstract

We have started the development of a detector system, sensitive to single photons in the eV energy range, to be suitably coupled to one of the CAST magnet ports. This system should open to CAST a window on possible detection of low energy Axion Like Particles emitted by the sun. Preliminary tests have involved a cooled photomultiplier tube coupled to the CAST magnet via a Galileian telescope and a switched 40 m long optical fiber. This system has reached the limit background level of the detector alone in ideal conditions, and two solar tracking runs have been performed with it at CAST. Such a measurement has never been done before with an axion helioscope. We will present results from these runs and briefly discuss future detector developments., Paper submitted to the proceedings of the "4th Patras Workshop on Axions, WIMPs and WISPs", DESY, Hamburg Site - Germany, 18-21 June 2008. Author affiliations are reported on the title page of the paper. In version 2: 1 affiliation change, 3 references added

Published
2009
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