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Your search keyword '"Irastorza, I. G."' showing total 30 results
Start Over Author "Irastorza, I. G." Topic physics::instrumentation and detectors
30 results on '"Irastorza, I. G."'

1. Recoil imaging for directional detection of dark matter, neutrinos, and physics beyond the Standard Model

Author

O'Hare, C. A. J., Loomba, D., Altenmüller, K., Álvarez-Pol, H., Amaro, F. D., Araújo, H. M., Sierra, D. Aristizabal, Asaadi, J., Attié, D., Aune, S., Awe, C., Ayyad, Y., Baracchini, E., Barbeau, P., Battat, J. B. R., Bell, N. F., Biasuzzi, B., Bignell, L. J., Boehm, C., Bolognino, I., Brunbauer, F. M., Caamaño, M., Cabo, C., Caratelli, D., Carmona, J. M., Castel, J. F., Cebrián, S., Cogollos, C., Collison, D., Costa, E., Dafni, T., Dastgiri, F., Deaconu, C., De Romeri, V., Desch, K., Dho, G., Di Giambattista, F., Díez-Ibáñez, D., D'Imperio, G., Dutta, B., Eldridge, C., Elliott, S. R., Ezeribe, A. C., Fava, A., Felkl, T., Fernández-Domínguez, B., Ribas, E. Ferrer, Flöthner, K. J., Froehlich, M., Galán, J., Galindo, J., García, F., Pascual, J. A. García, Gelli, B. P., Ghrear, M., Giomataris, Y., Gnanvo, K., Gramellini, E., Di Cortona, G. Grilli, Hall-Wilton, R., Harton, J., Hedges, S., Higashino, S., Hill, G., Holanda, P. C., Ikeda, T., Irastorza, I. G., Jackson, P., Janssens, D., Jones, B., Kaminski, J., Katsioulas, I., Kelly, K., Kemmerich, N., Kemp, E., Korandla, H. B., Kraus, H., Lackner, A., Lane, G. J., Lewis, P. M., Lisowska, M., Luzón, G., Lynch, W. A., Maccarrone, G., Mack, K. J., Majewski, P. A., Mano, R. D. P., Margalejo, C., Markoff, D., Marley, T., Marques, D. J. G., Massarczyk, R., Mazzitelli, G., McCabe, C., McKie, L. J., McLean, A. G., McNamara, P. C., Mei, Y., Messina, A., Mills, A. F., Mirallas, H., Miuchi, K., Monteiro, C. M. B., Mosbech, M. R., Muller, H., da Luz, H. Natal, Nakamura, K. D., Natochii, A., Neep, T., Newstead, J. L., Nikolopoulos, K., Obis, L., Oliveri, E., Orlandini, G., de Solórzano, A. Ortiz, von Oy, J., Papaevangelou, T., Pérez, O., Perez-Gonzalez, Y. F., Pfeiffer, D., Phan, N. S., Piacentini, S., Olloqui, E. Picatoste, Pinci, D., Popescu, S., Prajapati, A., Queiroz, F. S., Raaf, J. L., Resnati, F., Ropelewski, L., Roque, R. C., Ruiz-Choliz, E., Rusu, A., Ruz, J., Samarati, J., Santos, E. M., Santos, J. M. F. dos, Sauli, F., Scharenberg, L., Schiffer, T., Schmidt, S., Scholberg, K., Schott, M., Schueler, J., Segui, L., Sekiya, H., Sengupta, D., Slavkovska, Z., Snowden-Ifft, D., Soffitta, P., van Stenis, M., Spooner, N. J. C., Strigari, L., Stuchbery, A. E., Sun, X., Torelli, S., Tilly, E. G., Thomas, A. W., Thorpe, T. N., Urquijo, P., Utrobičić, A., Vahsen, S. E., Veenhof, R., Vogel, J. K., Williams, A. G., Wood, M. H., and Zettlemoyer, J.

Subjects
High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology, Cosmology and Nongalactic Astrophysics (astro-ph.CO), High Energy Physics - Phenomenology (hep-ph), Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Astrophysics - Cosmology and Nongalactic Astrophysics, High Energy Physics - Experiment
Abstract

Recoil imaging entails the detection of spatially resolved ionization tracks generated by particle interactions. This is a highly sought-after capability in many classes of detector, with broad applications across particle and astroparticle physics. However, at low energies, where ionization signatures are small in size, recoil imaging only seems to be a practical goal for micro-pattern gas detectors. This white paper outlines the physics case for recoil imaging, and puts forward a decadal plan to advance towards the directional detection of low-energy recoils with sensitivity and resolution close to fundamental performance limits. The science case covered includes: the discovery of dark matter into the neutrino fog, directional detection of sub-MeV solar neutrinos, the precision study of coherent-elastic neutrino-nucleus scattering, the detection of solar axions, the measurement of the Migdal effect, X-ray polarimetry, and several other applied physics goals. We also outline the R&D programs necessary to test concepts that are crucial to advance detector performance towards their fundamental limit: single primary electron sensitivity with full 3D spatial resolution at the $\sim$100 micron-scale. These advancements include: the use of negative ion drift, electron counting with high-definition electronic readout, time projection chambers with optical readout, and the possibility for nuclear recoil tracking in high-density gases such as argon. We also discuss the readout and electronics systems needed to scale-up such detectors to the ton-scale and beyond., 77 pages, 20 figures. Submitted to the Proceedings of the US Community Study on the Future of Particle Physics (Snowmass 2021)

Published
2022

2. Recoil imaging for dark matter, neutrinos, and physics beyond the Standard Model

Author

Ciaran O'Hare, Loomba, D., Altenmuller, K., Alvarez-Pol, H., Amaro, F. D., Araujo, H. M., Aristizabal Sierra, D., Asaadi, J., Attie, D., Aune, S., Awe, C., Ayyad, Y., Baracchini, e, Barbeau, P., Battat, J. B. R., Bell, N. F., Biasuzzi, B., Bignell, L. J., Boehm, C., Bolognino, I., Brunbauer, F. M., Caamano, M., Cabo, C., Caratelli, D., Carmona, J. M., Castel, J. F., Cebrián, S., Cogollos, C., Collison, D., Costa, E., Dafni, T., Dastgiri, F., Deaconu, C., Romeri, V., Desch, K., Dho, G., Di Giambattista, F., Dezibánez, D., D Imperio, G., Dutta, B., Eldridge, C., Elliott, S. R., Ezeribe, A. C., Fava, A., Felkl, T., Fernández-Domnguez, B., Ferrer Ribas, E., Flothner, K. J., Froehlich, M., Galán, J., Galindo, J., Garca, F., Garca Pascual, J. A., Gelli, B. P., Ghrear, M., Giomataris, Y., Gnanvo, K., Gramellini, E., Di Cortona, G. Grilli, Hall-Wilton, R., Harton, J., Hedges, S., Higashino, S., Hill, G., Holanda, P. C., Ikeda, T., Irastorza, I. G., Jackson, P., Janssens, D., Jones, B., Kaminski, J., Katsioulas, I., Kelly, K., Kemmerich, N., Kemp, E., Korandla, H. B., Kraus, H., Lackner, A., Lane, G. J., Lewis, P. M., Lisowska, M., Luzón, G., Lynch, W. A., Maccarrone, G., Mack, K. J., Majewski, P. A., Mano, R. D. P., Margalejo, C., Markoff, D., Marley, T., Marques, D. J. G., Massarczyk, R., Mazzitelli, G., Mccabe, C., Mckie, L. J., Mclean, A. G., Mcnamara, P. C., Mei, Y., Messina, A., Mills, A. F., Mirallas, H., Miuchi, K., Monteiro, C. M. B., Mosbech, M. R., Muller, H., Natal Da Luz, H., Nakamura, K. D., Natochii, A., Neep, T., Newstead, J. L., Nikolopoulos, K., Obis, L., Oliveri, E., Orlandini, G., Ortiz de Solórzano, A., Oy, J., Papaevangelou, T., Pérez, O., Perez-Gonzalez, Y. F., Pfeiffer, D., Phan, N. S., Piacentini, S., Picatoste Olloqui, E., Pinci, D., Popescu, S., Prajapati, A., Queiroz, F. S., Raaf, J. L., Resnati, F., Ropelewski, L., Roque, R. C., Ruiz-Choliz, E., Rusu, A., Ruz, J., Samarati, J., Santos, E. M., Dos Santos, J. M. F., Sauli, F., Scharenberg, L., Schiffer, T., Schmidt, S., Scholberg, K., Schott, M., Schueler, J., Segui, L., Sekiya, H., Sengupta, D., Slavkovska, Z., Snowden-Ifft, D., Soffitta, P., Stenis, M., Spooner, N. J. C., Strigari, L., Stuchbery, A. E., Sun, X., Torelli, S., Tilly, E. G., Thomas, A. W., Thorpe, T. N., Urquijo, P., Utrobicic, A., Vahsen, S. E., Veenhof, R., Vogel, J. K., Williams, A. G., Wood, M. H., and Zettlemoyer, J.

Subjects
Astrophysics and Astronomy, Physics::Instrumentation and Detectors, hep-ex, astro-ph.CO, hep-ph, Detectors and Experimental Techniques, physics.ins-det, Particle Physics - Experiment, Particle Physics - Phenomenology
Abstract

Recoil imaging entails the detection of spatially resolved ionization tracks generated by particle interactions. This is a highly sought-after capability in many classes of detector, with broad applications across particle and astroparticle physics. However, at low energies, where ionization signatures are small in size, recoil imaging only seems to be a practical goal for micro-pattern gas detectors. This white paper outlines the physics case for recoil imaging, and puts forward a decadal plan to advance towards the directional detection of low-energy recoils with sensitivity and resolution close to fundamental performance limits. The science case covered includes: the discovery of dark matter into the neutrino fog, directional detection of sub-MeV solar neutrinos, the precision study of coherent-elastic neutrino-nucleus scattering, the detection of solar axions, the measurement of the Migdal effect, X-ray polarimetry, and several other applied physics goals. We also outline the R&D programs necessary to test concepts that are crucial to advance detector performance towards their fundamental limit: single primary electron sensitivity with full 3D spatial resolution at the $\sim$100 micron-scale. These advancements include: the use of negative ion drift, electron counting with high-definition electronic readout, time projection chambers with optical readout, and the possibility for nuclear recoil tracking in high-density gases such as argon. We also discuss the readout and electronics systems needed to scale-up such detectors to the ton-scale and beyond.

Published
2022

3. Topological background discrimination in the PandaX-III neutrinoless double beta decay experiment

Author

Galan, J, Chen, X, Du, H, Fu, C, Giboni, K, Giuliani, F, Han, K, Jiang, B, Ji, X, Lin, H, Lin, Y, Liu, J, Ni, K, Ren, X, Wang, S, Wu, S, Xie, C, Yang, Y, Zhang, D, Zhang, T, Zhao, L, Aune, S, Bedfer, Y, Berthoumieux, E, Calvet, D, d'Hose, N, Ferrer-Ribas, E, Kunne, F, Manier, B, Neyret, D, Papaevangelou, T, Chen, L, Hu, S, Jian, S, Li, P, Li, X, Zhang, H, Zhao, M, Zhou, J, Mao, Y, Qiao, H, Yuan, Y, Wang, M, Chen, Y, Khan, A N, Raper, N, Tang, J, Wang, W, Feng, C, Li, C, Liu, S, Wang, X, Zhu, D, Castel, J F, Cebrián, S, Dafni, T, Irastorza, I G, Luzón, G, Mirallas, H, Sun, X, Tan, A, Haxton, W, Mei, Y, Kobdaj, C, Yan, Y, Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, Electron, Topology, 01 natural sciences, programming, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), double-beta decay: (0neutrino), Double beta decay, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Physics, Time projection chamber, 010308 nuclear & particles physics, track data analysis, background, Detector, Instrumentation and Detectors (physics.ins-det), time projection chamber, Orders of magnitude (time), xenon: nuclide, Event (particle physics), Electron scattering, Energy (signal processing)
Abstract

The PandaX-III experiment plans to search for neutrinoless double beta decay (0$\nu\beta\beta$) of $^{136}$Xe in the China JinPing underground Laboratory (CJPL). The experiment will use a high pressure gaseous Time Projection Chamber (TPC) to register both the energy and the electron track topology of an event. This article is devoted to the software side of the experiment. As software tool we use REST, a framework developed for the reconstruction and simulation of TPC-based detector systems. We study the potential for background reduction by introducing appropiate parameters based on the properties of 0$\nu\beta\beta$ events. We exploit for the first time not only the energy density of the electron track-ends, but also the electron scattering angles produced by an electron near the end of its trajectory. To implement this, we have added new algorithms for detector signal and track processing inside REST. Their assessment shows that background can be reduced by about 7 orders of magnitude while keeping 0$\nu\beta\beta$ efficiency above 20% for the PandaX-III baseline readout scheme, a 2-dimensional 3mm-pitch stripped readout. More generally, we use the potential of REST to handle 2D/3D data to assess the impact on signal-to-background significance at different detector granularities, and to validate the PandaX-III baseline choice. Finally, we demonstrate the potential to discriminate surface background events generated at the readout plane in the absence of $t_o$, by making use of event parameters related with the diffusion of electrons., Comment: 40 pages, 15 figures. Prepared for submission to Journal of Physics G

Published
2020
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4. New CAST Limit on the Axion-Photon Interaction

Author

CAST collaboration, Anastassopoulos, V., Aune, S., Barth, K., Belov, A., Brauninger, H., Cantatore, G., Carmona, J. M., Castel, J. F., Cetin, S. A., Christensen, F., Collar, J. I., Dafni, T., Davenport, M., Decker, T. A., Dermenev, A., Desch, K., Eleftheriadis, C., Fanourakis, G., Ferrer-Ribas, E., Fischer, H., Garcia, J. A., Gardikiotis, A., Garza, J. G., Gazis, E. N., Geralis, T., Giomataris, I., Gninenko, S., Hailey, C. J., Hasinoff, M. D., Hoffmann, D. H. H., Iguaz, F. J., Irastorza, I. G., Jakobsen, A., Jacoby, J., Jakovcic, K., Kaminski, J., Karuza, M., Kralj, N., Krcmar, M., Kostoglou, S., Krieger, Ch., Lakic, B., Laurent, J. M., Liolios, A., Ljubicic, A., Luzon, G., Maroudas, M., Miceli, L., Neff, S., Ortega, I., Papaevangelou, T., Paraschou, K., Pivovaroff, M. J., Raffelt, G., Rosu, M., Ruz, J., Choliz, E. Ruiz, Savvidis, I., Schmidt, S., Semertzidis, Y. K., Solanki, S. K., Stewart, L., Vafeiadis, T., Vogel, J. K., Yildiz, S. C., Zioutas, K., Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, CAST, Institut de Recherches sur les lois Fondamentales de l'Univers ( IRFU ), Commissariat à l'énergie atomique et aux énergies alternatives ( CEA ) -Université Paris-Saclay, Anastassopoulos, V., Aune, S., Barth, K., Belov, A., Bräuninger, H., Cantatore, Giovanni, Carmona, J. M., Castel, J. F., Cetin, S. A., Christensen, F., Collar, J. I., Dafni, T., Davenport, M., Decker, T. A., Dermenev, A., Desch, K., Eleftheriadis, C., Fanourakis, G., Ferrer Ribas, E., Fischer, H., García, J. A., Gardikiotis, A., Garza, J. G., Gazis, E. N., Geralis, T., Giomataris, I., Gninenko, S., Hailey, C. J., Hasinoff, M. D., Hoffmann, D. H. H., Iguaz, F. J., Irastorza, I. G., Jakobsen, A., Jacoby, J., Jakovčić, K., Kaminski, J., Karuza, M., Kralj, N., Krčmar, M., Kostoglou, S., Krieger, C. h., Lakić, B., Laurent, J. . m., Liolios, A., Ljubičić, A., Luzón, G., Maroudas, M., Miceli, L., Neff, S., Ortega, I., Papaevangelou, T., Paraschou, K., Pivovaroff, M. J., Raffelt, G., Rosu, M., Ruz, J., Chóliz, E. Ruiz, Savvidis, I., Schmidt, S., Semertzidis, Y. . k., Solanki, S. K., Stewart, L., Vafeiadis, T., Vogel, J. K., Yildiz, S. C., and Zioutas, K.

Subjects
solar axion, Photon, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, General Physics and Astronomy, magnetic field, 01 natural sciences, 7. Clean energy, law.invention, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Axion, law, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Detectors and Experimental Techniques, physics.ins-det, [ PHYS.PHYS.PHYS-INS-DET ] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Physics, Large Hadron Collider, Instrumentation and Detectors (physics.ins-det), Axions, solar axions, axion helioscope, dark matter, axion-like particles, CERN LHC Coll, S029IAG, CAST, axion: mass, Astrophysics::Earth and Planetary Astrophysics, CERN Axion Solar Telescope, Particle Physics - Experiment, Particle physics, CERN Lab, Dark matter, FOS: Physical sciences, Telescope, Nuclear physics, [ PHYS.HEXP ] Physics [physics]/High Energy Physics - Experiment [hep-ex], 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Coupling constant, Helioscope, hep-ex, 010308 nuclear & particles physics, background, coupling constant, axions, dark matter, axion helisocope, axion-photon coupling, sensitivity, magnet, coupling: (axion 2photon), High Energy Physics::Experiment, axion: solar, experimental results
Abstract

During 2003--2015, the CERN Axion Solar Telescope (CAST) has searched for $a\to\gamma$ conversion in the 9 T magnetic field of a refurbished LHC test magnet that can be directed toward the Sun. In its final phase of solar axion searches (2013--2015), CAST has returned to evacuated magnet pipes, which is optimal for small axion masses. The absence of a significant signal above background provides a world leading limit of $g_{a\gamma} < 0.66 \times 10^{-10} {\rm GeV}^{-1}$ (95% C.L.) on the axion-photon coupling strength for $m_a \lesssim 0.02$ eV. Compared with the first vacuum phase (2003--2004), the sensitivity was vastly increased with low-background x-ray detectors and a new x-ray telescope. These innovations also serve as pathfinders for a possible next-generation axion helioscope., Comment: Second version after referees comments (post-print). Published version available Open Access at https://www.nature.com/articles/nphys4109

Published
2017
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5. Search for Solar Axions by the CERN Axion Solar Telescope with He3 Buffer Gas: Closing the Hot Dark Matter Gap

Author

Arik, M., Aune, S., Barth, K., Belov, A., Borghi, S., Brauninger, H., Cantatore, Giovanni, Carmona, J. M., Cetin, S. A., Da Riva, J. I. Collar E., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer Ribas, E., Friedrich, P., Galan, J., Garcia, J. A., Gardikiotis, A., Garza, J. G., Gazis, E. N., Geralis, T., Georgiopoulou, E., Giomataris, I., Gninenko, S., Gomez, H., Gomez Marzoa, M., Gruber, E., Guthorl, T., Hartmann, R., Hauf, S., Haug, F., Hasinoff, M. D., Hoffmann, D. H. H., Iguaz, F. J., Irastorza, I. G., Jacoby, J., Jakovcic, K., Karuza, M., Konigsmann, K., Kotthaus, R., Krcmar, M., Kuster, M., Lakic, B., Lang, P. M., Laurent, J. M., Liolios, A., Ljubicic, A., Lozza, V., Luzon, G., Neff, S., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Riege, H., Rodriguez, A., Rosu, M., Ruz, J., Savvidis, I., Shilon, I., Silva, P. S., Solanki, S. K., Stewart, L., Tomas, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J. K., Yildiz, S. C., Zioutas, K., M., Arik, S., Aune, K., Barth, A., Belov, S., Borghi, H., Brauninger, Cantatore, Giovanni, J. M., Carmona, S. A., Cetin, J. I. Collar E., Da Riva, T., Dafni, M., Davenport, C., Eleftheriadi, N., Elia, G., Fanouraki, E., Ferrer Riba, P., Friedrich, J., Galan, J. A., Garcia, A., Gardikioti, J. G., Garza, E. N., Gazi, T., Gerali, E., Georgiopoulou, I., Giomatari, S., Gninenko, H., Gomez, M., Gomez Marzoa, E., Gruber, T., Guthorl, R., Hartmann, S., Hauf, F., Haug, M. D., Hasinoff, D. H. H., Hoffmann, F. J., Iguaz, I. G., Irastorza, J., Jacoby, K., Jakovcic, M., Karuza, K., Konigsmann, R., Kotthau, M., Krcmar, M., Kuster, B., Lakic, P. M., Lang, J. M., Laurent, A., Liolio, A., Ljubicic, V., Lozza, G., Luzon, S., Neff, T., Niinikoski, A., Nordt, T., Papaevangelou, M. J., Pivovaroff, G., Raffelt, H., Riege, A., Rodriguez, M., Rosu, J., Ruz, I., Savvidi, I., Shilon, P. S., Silva, S. K., Solanki, L., Stewart, A., Toma, M., Tsagri, K., van Bibber, T., Vafeiadi, J., Villar, J. K., Vogel, S. C., Yildiz, and K., Zioutas

Subjects
solar axions, dark matter, Photon detection, solar axion, Physics::Instrumentation and Detectors, Astrophysics::Solar and Stellar Astrophysics, Astrophysics::Earth and Planetary Astrophysics
Abstract

The CERN Axion Solar Telescope (CAST) has finished its search for solar axions with 3^He buffer gas, covering the search range 0.64 eV < m_a

Published
2014

6. Status of CAST and Solar Chameleon searches

Author

Vafeiadis, T., Arik, M., Aune, S., Barth, K., Belov, A., Borghi, S., Bräuninger, H., Cantatore, G., Carmona, J. M., Cetin, S. A., Collar, J. I., Da Riva, E., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Friedrich, P., Galán, J., Garcia, J. A., Gardikiotis, A., Garza, J. G., Gazis, E. N., Geralis, T., Georgiopoulou, E., Giomataris, I., Gninenko, S., Gomez, H., Gomez Marzoa, M., Gruber, E., Guthörl, T., Hartmann, R., Hauf, S., Haug, F., Hasinoff, M. D., Hoffmann, D. H. H., Iguaz, F. J., Irastorza, I. G., Jacoby, J., Jakovcic, K., Karuza, M., Königsmann, K., Kotthaus, R., Krvcmar, M., Kuster, M., Lakic, B., Lang, P. M., Laurent, J. M., Liolios, A., Ljubicic, A., Lozza, V., Luzon, G., Neff, S., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Riege, H., Rodriguez, A., Rosu, M., Ruz, J., Savvidis, I., Shilon, I., Silva, P. S., Solanki, S. K., Stewart, L., Tomas, A., Tsagri, M., Van Bibber, K., Villar, J., Vogel, J. K., Yildiz, S. C., and Zioutas., K.

Subjects
High Energy Physics::Theory, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology
Abstract

Vafeiadis, T. "Status of CAST and Solar Chameleon searches" in Proceedings, 10th Patras Workshop on Axions, WIMPs and WISPs (AXION-WIMP 2014) / Tsesmelis, Emmanuel, Maroudas, Marios (eds.), Verlag Deutsches Elektronen-Synchrotron : 2014 ; AXION-WIMP 2014 : 10th Patras Workshop on Axions, WIMPs and WISPs, 2014-06-29 - 2014-07-04, Geneva 10th Patras Workshop on Axions, WIMPs and WISPs, AXION-WIMP 2014, Geneva, Switzerland, 29 Jun 2014 - 4 Jul 2014 ; DESY-PROC 156-161(2014). doi:10.3204/DESY-PROC-2014-03/vafeiadis_theodoros, CERN Axion Solar Telescope (CAST) is the most powerful axion helioscope searching for axions and axion-like particles produced in the Sun. CAST completed its search for solar axions with $^{3}$He buffer gas in the magnet bores, covering axion masses up to 1.2 eV. In the absence of excess X-rays it has set the best experimental limit on the axion-photon coupling constant over a broad range of axion masses. In 2013 CAST has improved its sensitivity to solar axions with rest mass below 0.02 eV by using Micromegas detectors and it will continue in 2014 with the implementation of a second X-ray optic and a new type detector (InGrid). In 2013 CAST has extended its sensitivity into the sub-keV energy range using a silicon detector (SDD), to search for solar chameleons, extending its searches to the dark energy sector. This search will be continued in 2014 and 2015 as well with the InGrid detector. Future axion searches can improve the current axion sensitivity by 1 to 1.5 orders of magnitude with a new generation axion telescope (IAXO)., Published by Verlag Deutsches Elektronen-Synchrotron, Hamburg

Published
2014
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7. Solar axion search with the CAST experiment

Author

CAST Collaboration, Arik, E., Aune, S., Autiero, D., Barth, K., Belov, A., Beltrán, B., Borghi, S., Boydag, F. S., Bräuninger, H., Cantatore, G., Carmona, J. M., 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., Galán, J., Gazis, E., Geralis, T., Giomataris, I., Gninenko, S., Gómez, H., Hasinoff, M., Heinsius, F. H., Hikmet, I., Hoffmann, D. H. H., Irastorza, I. G., Jacoby, J., Jakovčić, K., Kang, D., Karageorgopoulou, T., Karuza, M., Königsmann, K., Kotthaus, R., Krčmar, M., Kousouris, K., Kuster, M., Lakić, B., Lasseur, C., Liolios, A., Ljubičić, A., Lozza, V., Lutz, G., Luzón, G., Miller, D., Morales, J., Niinikoski, T., Nordt, A., Ortiz, A., Papaevangelou, T., Pivovaroff, M. J., Placci, A., Raiteri, G., Raffelt, G., Riege, H., Rodríguez, A., Ruz, J., Savvidis, I., Semertzidis, Y., Serpico, P., Solanki, S. K., Soufli, R., Stewart, L., Tsagri, M., van Bibber, K., Villar, J5D., Vogel, J., Walckiers, L., Zioutas, K., Esther Ferrer Ribas, Arik, E, Aune, S, Autiero, D, Barth, K, Belov, A, Beltrán, B, Borghi, S, BOYDAG F., S, Bräuninger, H, Cantatore, Giovanni, CARMONA J., M, CETIN S., A, COLLAR J., I, Dafni, T, Davenport, M, DI LELLA, L, DOGAN O., B, Eleftheriadis, C, Elias, N, FANOURAKIS G., K, FERRER RIBAS, E, Fischer, H, Franz, J, Galán, J, Gazis, E, Geralis, T, Giomataris, I, Gninenko, S, Gómez, H, Hasinoff, M, HEINSIUS F., H, Hikmet, I, HOFFMANN D. H., H, IRASTORZA I., G, Jacoby, J, Jakovcic, K, Kang, D, Karageorgopoulou, T, Karuza, M, KÖNIGSMANN K., C, Kotthaus, R, Krcmar, M, Kousouris, K, Kuster, M, Lakic, B, Lasseur, C, Liolios, A, Ljubicic, A, Lozza, V, Lutz, G, Luzón, G, Miller, D, Morales, J, Niinikoski, T, Nordt, A, Ortiz, A, Papaevangelou, T, PIVOVAROFF M., J, Placci, A, Raiteri, G, Raffelt, G, Riege, H, Rodríguez, A, Ruz, J, Savvidis, I, Semertzidis, Y, Serpico, P, SOLANKI S., K, Soufli, R, Steward, L, Tsagri, M, VAN BIBBER, K, Villar, J, Vogel, J, Walckiers, L, and Zioutas, K.

Subjects
X-ray detector, Astrophysics and Astronomy, High Energy Physics - Experiment (hep-ex), solar axion, Physics::Instrumentation and Detectors, FOS: Physical sciences, solar axions, X-ray detectors, dark matter, Particle Physics - Experiment, High Energy Physics - Experiment
Abstract

The CAST (CERN Axion Solar Telescope) experiment is searching for solar axions by their conversion into photons inside the magnet pipe of an LHC dipole. The analysis of the data recorded during the first phase of the experiment with vacuum in the magnet pipes has resulted in the most restrictive experimental limit on the coupling constant of axions to photons. In the second phase, CAST is operating with a buffer gas inside the magnet pipes in order to extent the sensitivity of the experiment to higher axion masses. We will present the first results on the $^{4}{\rm He}$ data taking as well as the system upgrades that have been operated in the last year in order to adapt the experiment for the $^{3}{\rm He}$ data taking. Expected sensitivities on the coupling constant of axions to photons will be given for the recent $^{3}{\rm He}$ run just started in March 2008., Comment: Proceedings of the ICHEP 2008 conference

Published
2008

8. CAST solar axion search with 3^He buffer gas: Closing the hot dark matter gap

Author

Arik, M., Aune, S., Barth, K., Belov, A., Borghi, S., Brauninger, H., Cantatore, G., Carmona, J. M., Cetin, S. A., Collar, J. I., Da Riva, E., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Friedrich, P., Galan, J., Garcia, J. A., Gardikiotis, A., Garza, J. G., Gazis, E. N., Geralis, T., Georgiopoulou, E., Giomataris, I., Gninenko, S., Gomez, H., Marzoa, M. Gomez, Gruber, E., Guthorl, T., Hartmann, R., Hauf, S., Haug, F., Hasinoff, M. D., Hoffmann, D. H. H., Iguaz, F. J., Irastorza, I. G., Jacoby, J., Jakovcic, K., Karuza, M., Konigsmann, K., Kotthaus, R., Krcmar, M., Kuster, M., Lakic, B., Lang, P. M., Laurent, J. M., Liolios, A., Ljubicic, A., Lozza, V., Luzon, G., Neff, S., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Riege, H., Rodriguez, A., Rosu, M., Ruz, J., Savvidis, I., Shilon, I., Silva, P. S., Solanki, S. K., Stewart, L., Tomas, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J. K., Yildiz, S. C., and Zioutas, K.

Subjects
High Energy Physics - Experiment (hep-ex), Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Astrophysics::Solar and Stellar Astrophysics, FOS: Physical sciences, Astrophysics::Earth and Planetary Astrophysics, Instrumentation and Detectors (physics.ins-det), Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM), High Energy Physics - Experiment
Abstract

The CERN Axion Solar Telescope (CAST) has finished its search for solar axions with 3^He buffer gas, covering the search range 0.64 eV < m_a, 5 pages, 2 figures. Last version uploaded

Published
2013
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9. Ionization and scintillation response of high-pressure xenon gas to alpha particles

Author

NEXT Collaboration, Álvarez, V., Borges, F. I. G. M., Cárcel, S., Cebrián, S., Cervera, A., Conde, C. A. N., Dafni, T., Díaz, J., Egorov, M., Esteve, R., Evtoukhovitch, P., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Gehman, V. M., Gil, A., Goldschmidt, A., Gómez, H., Gómez-Cadenas, J. J., González-Díaz, D., Gutiérrez, R. M., Hauptman, J., Morata, J. A. Hernando, Herrera, D. C., Irastorza, I. G., Jinete, M. A., Labarga, L., Laing, A., Liubarsky, I., Lopes, J. A. M., Lorca, D., Losada, M., Luzón, G., Marí, A., Martín-Albo, J., Miller, T., Moiseenko, A., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Moutinho, L. M., Vidal, J. Muñoz, da Luz, H. Natal, Navarro, G., Nebot-Guinot, M., Nygren, D., Oliveira, C. A. B., Palma, R., Pérez, J., Aparicio, J. L. Pérez, Renner, J., Ripoll, L., Rodríguez, A., Rodríguez, J., Santos, F. P., Santos, J. M. F. dos, Segui, L., Serra, L., Shuman, D., Simón, A., Sofka, C., Sorel, M., Toledo, J. F., Tomás, A., Torrent, J., Tsamalaidze, Z., Vázquez, D., Veloso, J. F. C. A., Webb, R., White, J. T, Yahlali, N., Ministerio de Economía y Competitividad (España), and European Commission

Subjects
Scintillation (physics), Ionization, MECANICA DE LOS MEDIOS CONTINUOS Y TEORIA DE ESTRUCTURAS, Physics - Instrumentation and Detectors, Materials science, Ionització, Physics::Instrumentation and Detectors, FOS: Physical sciences, chemistry.chemical_element, Electron, Charge transport, Nuclear excitation, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, TECNOLOGIA ELECTRONICA, High Energy Physics - Experiment (hep-ex), Gaseous detectors, Xenon, Comptadors de centelleig, Ionization and excitation processes, 0103 physical sciences, Physics::Atomic and Molecular Clusters, Nuclear Experiment (nucl-ex), 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Nuclear Experiment, Instrumentation, Mathematical Physics, Helium, Detectors de radiació, Scintillation, Time projection chamber, 010308 nuclear & particles physics, Física, Multiplication and electroluminescence in rare gases and liquids, Instrumentation and Detectors (physics.ins-det), Alpha particle, Double-beta decay detectors, chemistry, Nuclear counters, Scintillation counter, Excitació nuclear, Atomic physics, Astrophysics - Instrumentation and Methods for Astrophysics
Abstract

High-pressure xenon gas is an attractive detection medium for a variety of applications in fundamental and applied physics. In this paper we study the ionization and scintillation detection properties of xenon gas at 10 bar pressure. For this purpose, we use a source of alpha particles in the NEXT-DEMO time projection chamber, the large scale prototype of the NEXT-100 neutrinoless double beta decay experiment, in three different drift electric field configurations. We measure the ionization electron drift velocity and longitudinal diffusion, and compare our results to expectations based on available electron scattering cross sections on pure xenon. In addition, two types of measurements addressing the connection between the ionization and scintillation yields are performed. On the one hand we observe, for the first time in xenon gas, large event-by-event correlated fluctuations between the ionization and scintillation signals, similar to that already observed in liquid xenon. On the other hand, we study the field dependence of the average scintillation and ionization yields. Both types of measurements may shed light on the mechanism of electron-ion recombination in xenon gas for highly-ionizing particles. Finally, by comparing the response of alpha particles and electrons in NEXT-DEMO, we find no evidence for quenching of the primary scintillation light produced by alpha particles in the xenon gas., This work was supported by the following agencies and institutions: the Spanish Ministerio de Economia y Competitividad under grants CONSOLIDER-Ingenio 2010 CSD2008-0037 (CUP) and FPA2009-13697-C04-04; the Portuguese FCT and FEDER through the program COMPETE, projects PTDC/FIS/103860/2008 and PTDC/FIS/112272/2009; and the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. J. Renner (LBNL) acknowledges the support of a US DOE NNSA Stewardship Science Graduate Fellowship under contract no. DE-FC52-08NA28752

Published
2013
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10. IAXO - The International Axion Observatory

Author

Vogel, J. K., Avignone, F. T., Cantatore, G., Carmona, J. M., Caspi, S., Cetin, S. A., Christensen, F. E., Dael, A., Dafni, T., Davenport, M., Derbin, A. V., Desch, K., Diago, A., Dudarev, A., Eleftheriadis, C., Fanourakis, G., Ferrer-Ribas, E., Galan, J., Garcia, J. A., Garza, J. G., Geralis, T., Gimeno, B., Giomataris, I., Gninenko, S., Gomez, H., Hailey, C. J., Hiramatsu, T., Hoffmann, D. H. H., Iguaz, F. J., Irastorza, I. G., Isern, J., Jaeckel, J., Jakovcic, K., Kaminski, J., Kawasaki, M., Krcmar, M., Krieger, C., Lakic, B., Lindner, A., Liolios, A., Luzon, G., Ortega, I., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Redondo, J., Ringwald, A., Russenschuck, S., Ruz, J., Saikawa, K., Savvidis, I., Sekiguchi, T., Shilon, I., Silva, H., Ten Kate, H. H. J., Tomas, A., Troitsky, S., Bibber, K., Vedrine, P., Villar, J. A., Walckiers, L., William Wester, Yildiz, S. C., and Zioutas, K.

Subjects
High Energy Physics::Theory, High Energy Physics - Experiment (hep-ex), Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Detectors and Experimental Techniques, High Energy Physics - Experiment
Abstract

The International Axion Observatory (IAXO) is a next generation axion helioscope aiming at a sensitivity to the axion-photon coupling of a few 10^{-12} GeV^{-1}, i.e. 1-1.5 orders of magnitude beyond sensitivities achieved by the currently most sensitive axion helioscope, the CERN Axion Solar Telescope (CAST). Crucial factors in improving the sensitivity for IAXO are the increase of the magnetic field volume together with the extensive use of x-ray focusing optics and low background detectors, innovations already successfully tested at CAST. Electron-coupled axions invoked to explain the white dwarf cooling, relic axions, and a large variety of more generic axion-like particles (ALPs) along with other novel excitations at the low-energy frontier of elementary particle physics could provide additional physics motivation for IAXO., Comment: 6 pages, 1 figure, Contribution to the 8th Patras Workshop on Axions, WIMPs and WISPs, Chicago, IL, USA, 2012

Published
2013
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11. Status and Perspectives of the CAST Experiment

Author

Lakić, B., Arik, M., Collar, J. I., Da Riva, E., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Fanourakis, G., FerrerRibas, E., Friedrich, P., Galán, J., Aune, S., García, J. A., Gardikiotis, A., Garza, J. G., Gazis, E. N., Geralis, T., Georgiopoulou, E., Giomataris, I., Gninenko, S., Gómez, H., Gómez Marzoa, H., Barth, K., Gruber, E., Guthörl, T., Hartmann, R., Hauf, S., Haug, F., Hasinoff, M. D., Hoffmann, D. H. H., Iguaz, F. J., Irastorza, I. G., Jacoby, J., Belov, A., Jakovčić, K., Karuza, M., Königsmann, K., Kotthaus, R., Krčmar, M., Kuster, M., Lang, P. M., Laurent, J. M., Liolios, A., Ljubičić, A., Borghi, S., Lozza, V., Luzón, G., Neff, S., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Riege, H., Rodríguez, A., Bräuninger, H., Rosu, M., Ruz, J., Savvidis, I., Shilon, I., Silva, P. S., Solanki, S. K., Stewart, L., Tomás, A., Tsagri, M., van Bibber, K., Cantatore, G., Vafeiadis, T., Villar, J., Vogel, J. K., Yildiz, S. C., Zioutas, K., Carmona, J. M., and Cetin, S. A.

Subjects
High Energy Physics::Theory, Physics::Instrumentation and Detectors, Hypothetisches Teilchen, High Energy Physics::Phenomenology
Abstract

Lakic, B. "Status and Perspectives of the CAST Experiment" in Proceedings, 9th Patras Workshop on Axions, WIMPs and WISPs (AXION-WIMP 2013) / Oberlack, Uwe, Sissol, Pierre (eds.), 2013 ; AXION-WIMP 2013 : 9th Patras Workshop on Axions, WIMPs and WISPs , 2013-06-23 - 2013-06-28, Mainz 9th Patras Workshop on Axions, WIMPs and WISPs, AXION-WIMP 2013, Mainz, Germany, 24 Jun 2013 - 28 Jun 2013; Hamburg : Verlag Deutsches Elektronen-Synchrotron, DESY-PROC 119-122 (2013). doi:10.3204/DESY-PROC-2013-04/lakic_biljana_CAST, CERN Axion Solar Telescope (CAST) is currently the most sensitive axion helioscope designed to search for axions and axion-like particles produced in the Sun. CAST is using a Large Hadron Collider prototype magnet where axions could be converted into X-rays. So far, no evidence of signal has been found and CAST set the best experimental limit on the axion-photon coupling constant over a broad range of axion masses up to ∼ 1 eV., Published by Verlag Deutsches Elektronen-Synchrotron, Hamburg

Published
2013
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12. In-situ calibration of a PMT inside a scintillation detector by means of primary scintillation detection

Author

NEXT Collaboration, ��lvarez, V., Borges, F. I. G. M., C��rcel, S., Castel, J., Cebri��n, S., Cervera, A., Conde, C. A. N., Dafni, T., Dias, T. H. V. T., D��az, J., Egorov, M., Esteve, R., Evtoukhovitch, P., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Gehman, V. M., Gil, A., Goldschmidt, A., G��mez, H., G��mez-Cadenas, J. J., Gonz��lez-D��az, D., Guti��rrez, R. M., Hauptman, J., Morata, J. A. Hernando, Herrera, D. C., Iguaz, F. J., Irastorza, I. G., Jinete, M. A., Labarga, L., Laing, A., Liubarsky, I., Lopes, J. A. M., Lorca, D., Losada, M., Luz��n, G., Mar��, A., Mart��n-Albo, J., Mart��nez, A., Miller, T., Moiseenko, A., Monrabal, F., Monteiro, C. M. B., Mora, F. J., Moutinho, L. M., Vidal, J. Mu��oz, da Luz, H. Natal, Navarro, G., Nebot, M., Nygren, D., Oliveira, C. A. B., Palma, R., P��rez, J., Aparicio, J. L. P��rez, Renner, J., Ripoll, L., Rodr��guez, A., Rodr��guez, J., Santos, F. P., Santos, J. M. F. dos, Segui, L., Serra, L., Shuman, D., Sim��n, A., Sofka, C., Sorel, M., Toledo, J. F., Tom��s, A., Torrent, J., Tsamalaidze, Z., V��zquez, D., Veloso, J. F. C. A., Villar, J. A., Webb, R. C., White, J. T, and Yahlali, N.

Subjects
High Energy Physics - Experiment (hep-ex), Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), High Energy Physics - Experiment
Abstract

We have investigated the possibility of calibrating the PMTs of scintillation detectors, using the primary scintillation produced by X-rays to induce single photoelectron response of the PMT. The high-energy tail of this response, can be approximated to an exponential function, under some conditions. In these cases, it is possible to determine the average gain for each PMT biasing voltage from the inverse of the exponent of the exponential fit to the tail, which can be done even if the background and/or noise cover-up most of the distribution. We have compared our results with those obtained by the commonly used single electron response (SER) method, which uses a LED to induce a single photoelectron response of the PMT and determines the peak position of such response, relative to the pedestal peak (the electronic noise peak, which corresponds to 0 photoelectrons). The results of the exponential fit method agree with those obtained by the SER method when the average number of photoelectrons reaching the first dynode per light/scintillation pulse is around 1.0. The SER method has higher precision, while the exponential fit method has the advantage of being useful in situations where the PMT is already in situ, being difficult or even impossible to apply the SER method, e.g. in sealed scintillator/PMT devices., 11 pages, 8 figures

Published
2012

13. NEXT, a HPGXe TPC for neutrinoless double beta decay searches

Author

The NEXT Collaboration, Granena, F., Lux, T., Nova, F., Rico, J., Sanchez, F., Nygren, D. R., Barata, J. A. S., Borges, F. I. G. M., Conde, C. A. N., Dias, T. H. V. T., Fernandes, L. M. P., Freitas, E. D. C., Lopes, J. A. M., Monteiro, C. M. B., Santos, J. M. F. dos, Santos, F. P., Tavora, L. M. N., Veloso, J. F. C. A., Calvo, E., Gil-Botella, I., Novella, P., Palomares, C., Verdugo, A., Giomataris, I., Ferrer-Ribas, E., Hernando-Morata, J. A., Martinez, D., Cid, X., Ball, M., Carcel, S., Cervera, A., Diaz, J., Gil, A., Gomez-Cadenas, J. J., Martin-Albo, J., Monrabal, F., Munoz-Vidal, J., Serra, L., Sorel, M., Yahlali, N., Bosch, R. Esteve, Lerche, C. W., Martinez, J. D., Mora, F. J., Sebastia, A., Tarazona, A., Toledo, J. F., Lazaro, M., Perez, J. L., Ripoll, L., Carmona, J. M., Cebrian, S., Dafni, T., Galan, J., Gomez, H., Iguaz, F. J., Irastorza, I. G., Luzon, G., Morales, J., Rodriguez, A., Ruz, J., Tomas, A., and Villar, J. A.

Subjects
High Energy Physics - Experiment (hep-ex), Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, High Energy Physics::Experiment, Instrumentation and Detectors (physics.ins-det), Nuclear Experiment (nucl-ex), Nuclear Experiment, High Energy Physics - Experiment
Abstract

We propose a novel detection concept for neutrinoless double-beta decay searches. This concept is based on a Time Projection Chamber (TPC) filled with high-pressure gaseous xenon, and with separated-function capabilities for calorimetry and tracking. Thanks to its excellent energy resolution, together with its powerful background rejection provided by the distinct double-beta decay topological signature, the design discussed in this Letter Of Intent promises to be competitive and possibly out-perform existing proposals for next-generation neutrinoless double-beta decay experiments. We discuss the detection principles, design specifications, physics potential and R&D plans to construct a detector with 100 kg fiducial mass in the double-beta decay emitting isotope Xe(136), to be installed in the Canfranc Underground Laboratory., Letter of Intent to the LSC Scientific Committee 115 pages

Published
2009

14. 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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15. Background study for the pn-CCD detector of CERN Axion Solar Telescope

Author

Cebrián, S., Rodríguez, A., Kuster, M., Beltrán, B., Carmona, J. M., Gómez, H., Hartmann, R., Irastorza, I. G., Kotthaus, R., Luzón, G., Morales, J., de Solórzano, A. Ortiz, Ruz, J., Strüder, L., and Villar, J. A.

Subjects
Physics, Photon, Large Hadron Collider, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Astrophysics::High Energy Astrophysical Phenomena, Detector, Astrophysics (astro-ph), FOS: Physical sciences, Astronomy and Astrophysics, Cosmic ray, Instrumentation and Detectors (physics.ins-det), Radiation, Astrophysics, Nuclear physics, High Energy Physics::Experiment, CERN Axion Solar Telescope, Axion, physics.ins-det, Primakoff effect
Abstract

The CERN Axion Solar Telescope (CAST) experiment searches for axions from the Sun converted into photons with energies up to around 10 keV via the inverse Primakoff effect in the high magnetic field of a superconducting Large Hadron Collider (LHC) prototype magnet. A backside illuminated pn-CCD detector in conjunction with an X-ray mirror optics is one of the three detectors used in CAST to register the expected photon signal. Since this signal is very rare and different background components (environmental gamma radiation, cosmic rays, intrinsic radioactive impurities in the set-up, ...) entangle it, a detailed study of the detector background has been undertaken with the aim to understand and further reduce the background level of the detector. The analysis is based on measured data taken during the Phase I of CAST and on Monte Carlo simulations of different background components. This study will show that the observed background level (at a rate of (8.00+-0.07)10^-5 counts/cm^2/s/keV between 1 and 7 keV) seems to be dominated by the external gamma background due to usual activities at the experimental site, while radioactive impurities in the detector itself and cosmic neutrons could make just smaller contribution., Comments: 10 pages, 9 figures and images, submitted to Astroparticle Physics

Published
2007

16. Results on axion physics from the CAST Experiment at CERN

Author

Eleftheriadis, Christos, Andriamonje, Samuel A, Aune, S, Barth, K, Belov, A, Beltran, B, Bräuninger, H, Carmona, J, Cebrián, S, Collar, J I, Dafni, T, Davenport, M, Di Lella, L, Englhauser, J, Fanourakis, G K, Ferrer-Ribas, E, Fischer, H, Franz, J, Friedrich, P, Geralis, T, Giomataris, Ioanis, Gninenko, S, Gomez, H, Hasinoff, M, Heinsius, F H, Hoffmann, D H H, Irastorza, I G, Jacoby, J, Jakovcic, K, Kang, D, Königsmann, K C, Kotthaus, R, Krcmar, M, Kousouris, K, Kuster, M, Laki, B, Lasseur, C, Liolios, A, Ljubicic, cA, Lutz, G, Luzón, G, Miller, D, Morales, A, Morales, J, Nordt, A, Ortiz, A, Papaevangelou, T, Placci, A, Raffelt, G, Riege1, H, Rodríguez, A, Ruz, J, Savvidis, I, Semertzidis, Y K, Serpico, Pasquale Dario, Stewart, L, Villar, J, Vogel, J, Walckiers, L, and Zioutas, K

Subjects
High Energy Physics::Theory, High Energy Physics - Experiment (hep-ex), Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, FOS: Physical sciences, Particle Physics - Experiment, High Energy Physics - Experiment
Abstract

Axions are expected to be produced in the sun via the Primakoff process. They may be detected through the inverse process in the laboratory, under the influence of a strong magnetic field, giving rise to X-rays of energies in the range of a few keV. Such an Axion detector is the CERN Axion Solar Telescope (CAST), collecting data since 2003. Results have been published, pushing the axion-photon coupling g$_{a\gamma}$ below the 10$^{-10}$ GeV$^{-1}$ limit at 95% CL, for axion masses less than 0.02 eV. This limit is nearly an order of magnitude lower than previous experimental limits and surpassed for the first time limits set from astrophysical arguments based on the energy-loss concept. The experiment is currently exploring axion masses in the range of 0.02 eV $< m_a, Comment: 13 pages, 5 figures, presented in the conference "Les Rencontres de Physique de la Vallee d'Aoste, La Thuile, 4 - 10 March 2007, Italy"

Published
2007
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17. An improved measurement of electron-ion recombination in high-pressure xenon gas

Author

NEXT Collaboration, Serra, L., Sorel, M., ��lvarez, V., Borges, F. I. G., Camargo, M., C��rcel, S., Cebri��n, S., Cervera, A., Conde, C. A. N., Dafni, T., D��az, J., Esteve, R., Fernandes, L. M. P., Ferrario, P., Ferreira, A. L., Freitas, E. D. C., Gehman, V. M., Goldschmidt, A., G��mez-Cadenas, J. J., Gonz��lez-D��az, D., Guti��rrez, R. M., Hauptman, J., Morata, J. A. Hernando, Herrera, D. C., Irastorza, I. G., Labarga, L., Laing, A., Liubarsky, I., Lopez-March, N., Lorca, D., Losada, M., Luz��n, G., Mar��, A., Mart��n-Albo, J., Mart��nez-Lema, G., Mart��nez, A., Miller, T., Monrabal, F., Monserrate, M., Monteiro, C. M. B., Mora, F. J., Moutinho, L. M., Vidal, J. Mu��oz, Nebot-Guinot, M., Nygren, D., Oliveira, C. A. B., P��rez, J., Aparicio, J. L. P��rez, Querol, M., Renner, J., Ripoll, L., Rodr��guez, A., Rodr��guez, J., Santos, F. P., Santos, J. M. F. dos, Shuman, D., Sim��n, A., Sofka, C., Toledo, J. F., Torrent, J., Tsamalaidze, Z., Veloso, J. F. C. A., Villar, J. A., Webb, R., White, J. T., and Yahlali, N.

Subjects
Ionization, MECANICA DE LOS MEDIOS CONTINUOS Y TEORIA DE ESTRUCTURAS, Physics - Instrumentation and Detectors, Physical measurements, Materials science, Ionització, Physics::Instrumentation and Detectors, Time projection chambers, Física -- Mesuraments, FOS: Physical sciences, chemistry.chemical_element, Charge transport, Scintillator, Nuclear excitation, 01 natural sciences, 7. Clean energy, High Energy Physics - Experiment, Ion, TECNOLOGIA ELECTRONICA, High Energy Physics - Experiment (hep-ex), Gaseous detectors, Ionization and excitation processes, Xenon, 0103 physical sciences, 010306 general physics, Instrumentation, Detectors de radiació, Mathematical Physics, Charge transport and multiplication in gas, Scintillation, scintillation and light emission processes (solid, gas and liquid scintillators), Time projection chamber, 010308 nuclear & particles physics, Time projection Chambers (TPC), multiplication and electroluminescence in rare gases and liquids, Instrumentation and Detectors (physics.ins-det), Alpha particle, Double-beta decay detectors, Electroluminescence, chemistry, Nuclear counters, Scintillators, Excitació nuclear, Alpha decay, Electroluminescència, Atomic physics
Abstract

We report on results obtained with the NEXT-DEMO prototype of the NEXT-100 high-pressure xenon gas time projection chamber (TPC), exposed to an alpha decay calibration source. Compared to our previous measurements with alpha particles, an upgraded detector and improved analysis techniques have been used. We measure event-by-event correlated fluctuations between ionization and scintillation due to electron-ion recombination in the gas, with correlation coeffcients between -0.80 and -0.56 depending on the drift field conditions. By combining the two signals, we obtain a 2.8 % FWHM energy resolution for 5.49 MeV alpha particles and a measurement of the optical gain of the electroluminescent TPC. The improved energy resolution also allows us to measure the specific activity of the radon in the gas due to natural impurities. Finally, we measure the average ratio of excited to ionized atoms produced in the xenon gas by alpha particles to be $0.561\pm 0.045$, translating into an average energy to produce a primary scintillation photon of $W_{\rm ex}=(39.2\pm 3.2)$ eV., Comment: 22 pages, 11 figures, 1 table

Published
2015
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18. Search for solar axions: the CAST experiment at CERN

Author

Beltran, Berta, Andriamonje, S., Arsov, V., Aune, S., Autiero, D., Avignone, F., Barth, K., Belov, A., Brauninger, H., Carmona, J. M., Cebrian, S., Chesi, E., Collar, J. I., Creswick, R., Dafni, T., Davenport, M., Di Lella, L., Eleftheriadis, C., Englhauser, J., Fanourakis, G., Farach, H., Ferrer, E., Fischer, H., Franz, J., Friedrich, P., Geralis, T., Giomataris, I., Gninenko, S., Goloubev, N., Hartmann, R., Hasinoff, M. D., Fritz-Herbert Heinsius, Hoffmann, D. H. H., Irastorza, I. G., Jacoby, J., Kang, D., Konigsmann, Kay, Kotthaus, R., Krcmar, M., Kousouris, K., Kuster, M., Lakic, B., Lasseur, C., Liolios, A., Ljubicic, A., Lutz, G., Luzon, G., Miller, David Wilkins, Morales, A., Morales, J., Mutterer, M., Nikolaidis, A., Ortiz, A., Papaevangelou, T., Placci, A., Raffelt, G., Ruz, J., Riege, H., Sarsa, M. L., Savvidis, I., Serber, W., Serpico, P., Semertzidis, Y., Stewart, L., Vieira, J. D., Villar, J., Walckiers, L., Zachariadou, K., Zioutas, K., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), and Girod, Dominique

Subjects
[PHYS.ASTR.SR] Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Physics::Instrumentation and Detectors, [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], High Energy Physics::Phenomenology, [SDU.ASTR.SR] Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], solar axions, dark matter, low background, [PHYS.ASTR.SR]Physics [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR], Particle Physics - Experiment, ComputingMilieux_MISCELLANEOUS
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 they would be transformed into X-rays with energies of a few keV. The CAST experiment at CERN is using a decommissioned LHC magnet as an axion helioscope in order to search for these axion-like particles. The analysis of the 2003 data has shown no signal above the background, thus implying an upper limit to the axion-photon coupling < 1.16*10^{-10} GeV^{-1} at 95% CL for m_{a}

Published
2005

19. THE CERN AXION SOLAR TELESCOPE (CAST): STATUS AND PROSPECTS

Author

Irastorza, I. G., Andriamonje, S., Arik, E., Autiero, D., Avignone, F., Barth, K., Bingol, E., Brauninger, H., Brodzinski, R., Carmona, J., Chesi, E., Cebrian, S., Cetin, S., Collar, J., Creswick, R., Dafni, T., Oliveira, R., Dedoussis, S., Delbart, A., Di Lella, L., Eleftheriadis, C., Fanourakis, G., Farach, H., Fischer, H., Formenti, F., Geralis, T., Giomataris, I., Gninenko, S., Goloubev, N., Hartmann, R., Hasinoff, N., Hoffmann, D., Jacoby, J., Kang, D., Konigsmann, Kay, Kotthaus, R., Krcmar, M., Kuster, M., Lakic, B., Liolios, A., Ljubicic, A., Lutz, G., Luzon, G., Miley, H., Morales, A., Morales, J., Mutterer, M., Nikolaidis, A., Ortiz, A., Papaevangelou, T., Placci, A., Raffelt, G., Riege, H., Sarsa, M., Savvidis, I., Schopper, R., Semertzidis, I., Spano, C., Villar, J., Vullierme, B., Walckiers, L., Zachariadou, K., and Zioutas, K.

Subjects
Astrophysics and Astronomy, Physics::Instrumentation and Detectors
Abstract

The CAST experiment is being mounted at CERN. It will make use of a decommissioned LHC test magnet to look for solar axions through its conversion into photons inside the magnetic field. The magnet has a field of 9 Tesla and length of 10 m and is installed in a platform which allows to move it ~8 degrees vertically and ~40 degrees horizontally. According to these numbers we expect a sensitivity in axion-photon coupling ~5 x 10^-11 GeV^-1 for axion masses m < ~10^-2 eV, and with a gas filled tube 10^-10 GeV^-1 for m < ~2 eV. The CAST experiment is being mounted at CERN. It will make use of a decommissioned LHC test magnet to look for solar axions through its conversion into photons inside the magnetic field. The magnet has a field of 9 Tesla and length of 10 m and is installed in a platform which allows to move it ~8 degrees vertically and ~40 degrees horizontally. According to these numbers we expect a sensitivity in axion-photon coupling ~5 x 10^-11 GeV^-1 for axion masses m < ~10^-2 eV, and with a gas filled tube 10^-10 GeV^-1 for m < ~2 eV.

Published
2003
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20. Physics Potential and Prospects for CUORE and CUORICINO experiments

Author

Irastorza, I. G., Morales, A., Scopel, S., and Cebrian, S.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Physics::Instrumentation and Detectors, Astrophysics (astro-ph), Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, High Energy Physics::Experiment, Astrophysics, Nuclear Experiment
Abstract

The CUORE (Cryogenic Underground Observatory for Rare Events) experiment projects to construct and operate an array of 1000 cryogenic thermal detectors of a mass of 760 g each to investigate rare events physics, in particular, double beta decay and non baryonic particle dark matter. A first step towards CUORE is CUORICINO, an array of 56 of such bolometers, currently being installed in the Gran Sasso. In this paper we report the physics potential of both stages of the experiment regarding neutrinoless double beta decay of 130Te, WIMP searches and solar axions., Comment: 30 pages, 5 figures, substantial changes in text and figures with respect to previous version

Published
2001
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21. Theoretical expectations and experimental prospects for solar axions searches with crystal detectors

Author

Scopel, S., Irastorza, I. G., Cebrian, S., Garcia, E., Gonzalez, D., Morales, A., Morales, J., de Solorzano, A. Ortiz, Puimedon, J., Salinas, A., Sarsa, M. L., and Villar, J. A.

Subjects
High Energy Physics - Phenomenology, High Energy Physics - Phenomenology (hep-ph), Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Astrophysics (astro-ph), FOS: Physical sciences, Astrophysics
Abstract

A calculation of the expected signal due to Primakov coherent conversion of solar axions into photons via Bragg scattering in several solid--state detectors is presented and compared with present and future experimental sensitivities. The axion window m_a>~0.03 eV (not accessible at present by other techniques) could be explored in the foreseeable future with crystal detectors to constrain the axion--photon coupling constant below the latest bounds coming from helioseismology. On the contrary a positive signal in the sensitivity region of such devices would imply revisiting other more stringent astrophysical limits derived for the same range of the axion mass., 8 pages, 1 figure, To be published in the proceedings of the 2nd International Workshop on the Identification of Dark Matter (IDM98), Buxton, England, 7-11 September 1998

22. CAST: A Search for solar axions at CERN

Author

Collar, J. I., Andriamonje, S., Arik, E., Autiero, D., Avignone, F., Barth, K., Bingol, E., Brauninger, H., Brodzinski, R., Carmona, J., Chesi, E., Cebrian, S., Cetin, S., Cipolla, G., Creswick, R., Dafni, T., Davenport, M., Oliveira, R., Dedoussis, S., Di Lella, L., Eleftheriadis, C., Fanourakis, G., Farach, H., Ferrer, E., Fischer, H., Formenti, F., Geralis, T., Giomataris, I., Gninenko, S., Goloubev, N., Hartmann, R., Hasinoff, M., Hoffmann, D., Irastorza, I. G., Jacoby, J., Kang, D., Konigsmann, Kay, Kotthaus, R., Krcmar, M., Kuster, M., Lakic, B., Liolios, A., Ljubicic, A., Lutz, G., Luzon, G., Miley, H., Morales, A., Morales, J., Mutterer, M., Nicolaidis, A., Ortiz, A., Papaevangelou, T., Placci, A., Raffelt, G., Riege, H., Sarsa, M., Savvidis, I., Schopper, R., Semertzidis, Y. K., Spano, C., Stipcevic, M., Vasileiou, V., Villar, J., Vullierme, B., Walckiers, L., Zachariadou, K., and Zioutas, K.

Subjects
Physics::Instrumentation and Detectors, Particle Physics - Experiment
Abstract

The new axion helioscope at CERN started acquiring data during September of 2002: CAST (Cern Axion Solar Telescope) employs a decommissioned LHC dipole magnet to convert putative solar axions or axion-like particles into detectable photons. The unprecedented dipole magnet intensity and length (9.5 T, 10 m) results in a projected sensitivity that surpasses astrophysical constraints on these particles for the first time, increasing the chance of discovery. The use of X-ray focusing optics and state-of-the-art detector technology has led to an extremely low background for an experiment above ground. A brief status report is given, with emphasis on the tracking and control system and possible future extensions. The new axion helioscope at CERN started acquiring data during September of 2002: CAST (Cern Axion Solar Telescope) employs a decommissioned LHC dipole magnet to convert putative solar axions or axion-like particles into detectable photons. The unprecedented dipole magnet intensity and length (9.5 T, 10 m) results in a projected sensitivity that surpasses astrophysical constraints on these particles for the first time, increasing the chance of discovery. The use of X-ray focusing optics and state-of-the-art detector technology has led to an extremely low background for an experiment above ground. A brief status report is given, with emphasis on the tracking and control system and possible future extensions.

23. The Search for solar axions in the CAST experiment

Author

Kang, D., Andriamonje, S., Arsov, V., Aune, S., Autiero, D., Avignone, F. T., Barth, K., Belov, A., Beltrán, B., Bräuninger, H., Carmona, J. M., Cebrián, S., Chesi, E., Collar, J. I., Creswick, R., Dafni, T., Davenport, M., Di Lella, L., Eleftheriadis, C., Englhauser, J., Fanourakis, G., Farach, H., Ferrer, E., Fischer, H., Franz, J., Friedrich, P., Geralis, T., Giomataris, I., Gninenko, S., Goloubev, N., Hasinoff, M. D., Heinsius, F. H., Hoffmann, D. H. H., Irastorza, I. G., Jacoby, J., Konigsmann, K., Kotthaus, R., Krcmar, M., Kousouris, K., Kuster, M., Lakic, B., Lasseur, C., Liolios, A., Ljubicic, A., Lutz, G., Luzon, G., Miller, D. W., Morales, A., Morales, J., Mutterer, M., Nikolaidis, A., Ortiz, A., Papaevangelou, T., Placci, A., Raffelt, G., jaime ruz, Riege, H., Sarsa, M. L., Savvidis, I., Serpico, P., Semertzidis, Y., Stewart, L., Vieira, J. D., Villar, J., Vogel, J., Walckiers, L., Zachariadou, K., and Zioutas, K.

Subjects
Physics::Instrumentation and Detectors, Particle Physics - Experiment
Abstract

The CAST (CERN Axion Solar Telescope) experiment at CERN searches for solar axions with energies in the keV range. It is possible that axions are produced in the core of the sun by the interaction of thermal photons with virtual photons of strong electromagnetic fields. In this experiment, the solar axions can be reconverted to photons in the transversal field of a 9 Tesla superconducting magnet. At both ends of the 10m-long dipole magnet three different X-ray detectors were installed, which are sensitive in the interesting photon energy range. Preliminary results from the analysis of the 2004 data are presented: g$_{a\gamma}

24. Search for Solar Axions by the CERN Axion Solar Telescope with He-3 Buffer Gas: Closing the Hot Dark Matter Gap

Author

Arik, M., Aune, S., Barth, K., Belov, A., Borghi, S., Braeuninger, H., Cantatore, G., Carmona, J. M., Cetin, S. A., Collar, J. I., Da Riva, E., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Friedrich, P., Galan, J., Garcia, J. A., Gardikiotis, A., Garza, J. G., Gazis, E. N., Geralis, T., Georgiopoulou, E., Giomataris, I., Gninenko, S., Gomez, H., Marzoa, M. Gomez, Gruber, E., Guthoerl, T., Hartmann, R., Hauf, S., Haug, F., Hasinoff, M. D., Hoffmann, D. H. H., Iguaz, F. J., Irastorza, I. G., Jacoby, J., Jakovcic, K., Karuza, M., Koenigsmann, K., Kotthaus, R., Krcmar, M., Kuster, M., Lakic, B., Lang, P. M., Laurent, J. M., Liolios, A., Ljubicic, A., Luzon, G., Neff, S., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Riege, H., Rodriguez, A., Rosu, M., Ruz, J., Savvidis, I., Shilon, I., Silva, P. S., Solanki, S. K., Stewart, L., Tomas, A., Tsagri, M., Van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J. K., and CAST Collaboration

Subjects
Physics::Instrumentation and Detectors, Astrophysics::Earth and Planetary Astrophysics
Abstract

The CERN Axion Solar Telescope has finished its search for solar axions with He-3 buffer gas, covering the search range 0.64 eV less than or similar to ma less than or similar to 1.17 eV. This closes the gap to the cosmological hot dark matter limit and actually overlaps with it. From the absence of excess x rays when the magnet was pointing to the Sun we set a typical upper limit on the axion-photon coupling of g(a gamma) less than or similar to 3.3 x 10(-10) GeV-1 at 95% C.L., with the exact value depending on the pressure setting. Future direct solar axion searches will focus on increasing the sensitivity to smaller values of g(a gamma), for example by the currently discussed next generation helioscope International AXion Observatory.

25. Solar axion search with the CAST experiment

Author

Borghi, S., Arik, E., Aune, S., Autiero, D., Barth, K., Belov, A., Beltrán, B., Bourlis, G., Boydag, F. S., Bräuninger, H., Cantatore, G., Carmona, J. M., Cebrián, 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., Galán, J., Gazis, E., Geralis, T., Giomataris, I., Gninenko, S., Gómez, H., Hasinoff, M., Heinsius, F. H., Hikmet, I., Hoffmann, D. H. H., Irastorza, I. G., Jacoby, J., Jakovčić, K., Kang, D., Karageorgopoulou, T., Karuza, M., Königsmann, K., Kotthaus, R., Krčmar, M., Kousouris, K., Kuster, M., Lakić, B., Lasseur, C., Liolios, A., Ljubičić, A., Lozza, V., Lutz, G., Luzón, G., Miller, D., Morales, A., Morales, J., Niinikoski, T., Nordt, A., Ortiz, A., Papaevangelou, T., Michael Pivovaroff, Placci, A., Raiteri, G., Raffelt, G., Riege, H., Rodríguez, A., Ruz, J., Savvidis, I., Semertzidis, Y., Serpico, P., Solanki, S. K., Soufli, R., Stewart, L., Tsagri, M., Bibber, K., Villar, J., Vogel, J., Walckiers, L., and Zioutas, K.

Subjects
High Energy Physics::Theory, Astrophysics and Astronomy, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology
Abstract

The CAST (CERN Axion Solar Telescope) experiment is searching for solar axions by their conversion into photons inside the magnet pipe of a LHC prototype dipole. In the phase II, CAST is operating with a buffer gas inside the magnet bore apertures in order to extent the sensitivity of the experiment to larger axion masses. Preliminary results from the analysis of this second phase with He inside the magnet pipes excludes axions down to $g_{aγ}$ < 2.2 · $10^{−10}GeV^{−1}$ at 95% C.L. for 0.02 eV < $m_{\alpha}$ < 0.39 eV. The data analysis has resulted in the most restrictive experimental limit on the coupling constant of axions to photons and for the first time experimental result has entered the theory motivated axion parameter space. At the beginning of 2008, data started to be taken with He in the magnet pipes in order to extend the sensitivity to axion masses up to 1.2 eV.

26. 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

27. The Next Generation of Axion Helioscopes: The International Axion Observatory (IAXO)

Author

Javier Redondo, Biljana Lakić, Eduardo Guendelman, K. van Bibber, A. Diago, S. Matsuki, Hector Gomez, Marin Karuza, C. Eleftheriadis, Olivier Limousin, H. H. J. ten Kate, Eric Armengaud, T. Dafni, Finn Erland Christensen, I. Ortega, Pierre Sikivie, Anders Clemen Jakobsen, F.J. Iguaz, Charles J. Hailey, Diego González-Díaz, Theodoros Vafeiadis, Milica Krčmar, Takashi Hiramatsu, V. N. Muratova, Dieter H. H. Hoffmann, J.A. Villar, S. C. Yildiz, Klaus Kurt Desch, I. Shilon, B. Döbrich, Javier Galan, J. G. Garza, Pierre Brun, A. Dael, S. Gninenko, F. T. Avignone, A. Tomás, W. C. Wester, C. Krieger, I. G. Irastorza, Masahiro Kawasaki, A. Lindner, A. Dudarev, Andreas Ringwald, Michael J. Pivovaroff, M. Betz, A. V. Derbin, P. Brax, C. Nones, D. Chelouche, Ioannis Giomataris, I. Savvidis, Yannis K. Semertzidis, S. Russenschuck, Kenichi Imai, Konstantin Zioutas, Theodoros Geralis, Serkant Ali Cetin, Giovanni Cantatore, Julia Vogel, Jordi Isern, H. Silva, E. Ferrer-Ribas, Ken'ichi Saikawa, G. Luzón, Dieter Horns, P. Vedrine, G. Fanourakis, Toyokazu Sekiguchi, Fritz Caspers, J. A. Garcia, Joerg Jaeckel, Amanda Weltman, J. Ruz, M. Davenport, J. Kaminski, L. Walckiers, Krešimir Jakovčić, Gianpaolo Carosi, A. Liolios, B. Gimeno, Georg G. Raffelt, T. Papaevangelou, J. M. Carmona, S. Caspi, Konstantinos Kousouris, I. Dratchnev, Sergey Troitsky, Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, TR3959, Çetin, Serkant Ali, Vogel, J. K., Armengaud, E., Avignone, F. T., Betz, M., Brax, P., Brun, P., Cantatore, Giovanni, Carmona, J. M., Carosi, G. P., Caspers, F., Caspi, S., Cetin, S. A., Chelouche, D., Christensen, F. E., Dael, A., Dafni, T., Davenport, M., Derbin, A. V., Desch, K., Diago, A., Döbrich, B., Dratchnev, I., Dudarev, A., Eleftheriadis, C., Fanourakis, G., Ferrer Ribas, E., Galán, J., García, J. A., Garza, J. G., Geralis, T., Gimeno, B., Giomataris, I., Gninenko, S., Gómez, H., González Díaz, D., Guendelman, E., Hailey, C. J., Hiramatsu, T., Hoffmann, D. H. H., Horns, D., Iguaz, F. J., Irastorza, I. G., Isern, J., Imai, K., Jakobsen, A. C., Jaeckel, J., Jakovčić, K., Kaminski, J., Kawasaki, M., Karuza, M., Krčmar, M., Kousouris, K., Krieger, C., Lakić, B., Limousin, O., Lindner, A., Liolios, A., Luzón, G., Matsuki, S., Muratova, V. N., Nones, C., Ortega, I., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Redondo, J., Ringwald, A., Russenschuck, S., Ruz, J., Saikawa, K., Savvidis, I., Sekiguchi, T., Semertzidis, Y. K., Shilon, I., Sikivie, P., Silva, H., ten Kate, H., Tomas, A., Troitsky, S., Vafeiadis, T., van Bibber, K., Vedrine, P., Villar, J. A., Walckiers, L., Weltman, A., Wester, W., Yildiz, S. C., and Zioutas, K.

Subjects
QCD axion, Particle physics, Physics::Instrumentation and Detectors, Dark matter, Physics and Astronomy(all), 01 natural sciences, 7. Clean energy, magnetic helioscope, High Energy Physics::Theory, QCD axions, Astroparticle Physics, Axion, Observatory, 0103 physical sciences, dark matter, Dark Matter, ddc:530, Detectors and Experimental Techniques, 010306 general physics, Astroparticle physics, Physics, Helioscope, 010308 nuclear & particles physics, Axion Dark Matter Experiment, High Energy Physics::Phenomenology, Strong CP problem, IAXO, Strong CP Problem, ALP, CERN Axion Solar Telescope, Particle Physics - Experiment, Helioscopes
Abstract

Çetin, Serkant Ali (Dogus Author) -- Conference full title: 13th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2013; Asilomar Conference Grounds Monterey Peninsula; United States; 8 September 2013 through 13 September 2013. The International Axion Observatory (IAXO) is a proposed 4th-generation axion helioscope with the primary physics research goal to search for solar axions via their Primakoff conversion into photons of 1 - 10 keV energies in a strong magnetic field. IAXO will achieve a sensitivity to the axion-photon coupling gaγ down to a few ×10-12 GeV-1 for a wide range of axion masses up to ∼ 0.25 eV. This is an improvement over the currently best (3rd generation) axion helioscope, the CERN Axion Solar Telescope (CAST), of about 5 orders of magnitude in signal strength, corresponding to a factor ∼ 20 in the axion photon coupling. IAXO's sensitivity relies on the construction of a large superconducting 8-coil toroidal magnet of 20 m length optimized for axion research. Each of the eight 60 cm diameter magnet bores is equipped with x-ray optics focusing the signal photons into ∼ 0.2 cm2 spots that are imaged by very low background x-ray detectors. The magnet will be built into a structure with elevation and azimuth drives that will allow solar tracking for 12 hours each day. This contribution is a summary of our papers [1-3] and we refer to these for further details.

Published
2015
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28. Readout technologies for directional WIMP Dark Matter detection

Author

J. A. Kadyk, T. N. Thorpe, A. Buonaura, H. Nishimura, Giuliana Galati, M. T. Hedges, Gabriela Druitt, Kentaro Miuchi, Ken'ichi Kuge, Hiroyuki Sekiya, M. Garcia-Sciveres, T. Hashimoto, L. Consiglio, H. Mirallas, Toru Tanimori, M. Tanaka, P. Monacelli, S. E. Vahsen, Javier Galan, Tetsuya Mizumoto, J. P. Lopez, T. Asada, G. De Lellis, A. Takada, I. G. Irastorza, O. Guillaudin, M. Ali Guler, M. Yoshimoto, A. B. Aleksandrov, Jerome Bouvier, T. Dafni, Maria Cristina Montesi, N. J. C. Spooner, F. Mayet, Philip Lewis, F.J. Iguaz, J. Lamblin, N. Di Marco, V. Gentile, T. Papevangelou, Ryosuke Taishaku, Adele Lauria, Natalia Guerrero, H. Tomita, Q. Riffard, J. P. Richer, Valeri Tioukov, S. Komura, Cosmin Deaconu, Y. Giomataris, Joseph D. Parker, Tatsuya Sawano, Daniel P. Snowden-Ifft, I. Jaegle, S. Cebrián, D. Loomba, Jocelyn Monroe, G. Bosson, Gianfranca De Rosa, A. Umemoto, E. Zayas, Taishi Katsuragawa, H. Kubo, Ihn Sik Seong, Nicola D'Ambrosio, Tatsuhiro Naka, P. Colas, J. Billard, F. Pupilli, E. R. Lee, Y. Mizumura, Koji Nakamura, O. Bourrion, Y. Yamaguchi, James Battat, D. Santos, E. Ferrer-Ribas, J. A. Garcia, Richard Eggleston, J. L. Harton, G. Luzón, M. Leyton, J. G. Garza, Atsuhiko Ochi, A. Di Crescenzo, K. Burdge, T. Descombes, A. Sugiyama, Takahiro Fusayasu, N. S. Phan, E. Baracchini, T. Ikeda, A. Takeda, Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes (UGA), AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), MIMAC, Battat, J. B. R., Irastorza, I. G., Aleksandrov, A., Asada, T., Baracchini, E., Billard, J., Bosson, G., Bourrion, O., Bouvier, J., Buonaura, Annarita, Burdge, K., Cebrián, S., Colas, P., Consiglio, L., Dafni, T., D’Ambrosio, N., Deaconu, C., DE LELLIS, Giovanni, Descombes, T., DI CRESCENZO, Antonia, Di Marco, N., Druitt, G., Eggleston, R., Ferrer Ribas, E., Fusayasu, T., Galán, J., Galati, Giuliana, García, J. A., Garza, J. G., Gentile, V., Garcia Sciveres, M., Giomataris, Y., Guerrero, N., Guillaudin, O., Guler, A. M., Harton, J., Hashimoto, T., Hedges, M. T., Iguaz, F. J., Ikeda, T., Jaegle, I., Kadyk, J. A., Katsuragawa, T., Komura, S., Kubo, H., Kuge, K., Lamblin, J., Lauria, Adele, Lee, E. R., Lewis, P., Leyton, M., Loomba, D., Lopez, J. P., Luzón, G., Mayet, F., Mirallas, H., Miuchi, K., Mizumoto, T., Mizumura, Y., Monacelli, P., Monroe, J., Montesi, MARIA CRISTINA, Naka, T., Nakamura, K., Nishimura, H., Ochi, A., Papevangelou, T., Parker, J. D., Phan, N. S., Pupilli, F., Richer, J. P., Riffard, Q., Rosa, G., Santos, D., Sawano, T., Sekiya, H., Seong, I. S., Snowden Ifft, D. P., Spooner, N. J. C., Sugiyama, A., Taishaku, R., Takada, A., Takeda, A., Tanaka, M., Tanimori, T., Thorpe, T. N., Tioukov, V., Tomita, H., Umemoto, A., Vahsen, S. E., Yamaguchi, Y., Yoshimoto, M., Zayas, E., Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), 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), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics - Instrumentation and Detectors, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics::Instrumentation and Detectors, Dark matter, General Physics and Astronomy, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Recoil, Optics, WIMP, 0103 physical sciences, High spatial resolution, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 010306 general physics, Instrumentation and Methods for Astrophysics (astro-ph.IM), Physics, 010308 nuclear & particles physics, business.industry, Detector, Instrumentation and Detectors (physics.ins-det), Signature (logic), 3. Good health, business, Astrophysics - Instrumentation and Methods for Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The measurement of the direction of WIMP-induced nuclear recoils is a compelling but technologically challenging strategy to provide an unambiguous signature of the detection of Galactic dark matter. Most directional detectors aim to reconstruct the dark-matter-induced nuclear recoil tracks, either in gas or solid targets. The main challenge with directional detection is the need for high spatial resolution over large volumes, which puts strong requirements on the readout technologies. In this paper we review the various detector readout technologies used by directional detectors. In particular, we summarize the challenges, advantages and drawbacks of each approach, and discuss future prospects for these technologies., Comment: 58 pages, 26 figures, accepted by Physics Reports

Published
2016
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29. Search for chameleons with CAST

Author

J. I. Collar, M. Arik, F.J. Iguaz, Milica Krčmar, Javier Galan, Philippe Brax, José Villar, S. C. Yildiz, Marin Karuza, Julia Vogel, K. Barth, G. Luzón, Biljana Lakić, M. Davenport, M. Kavuk, I. Ortega, Joachim Jacoby, Heinrich Bräuninger, Serkant Ali Cetin, T. Geralis, Georg G. Raffelt, E. Ferrer-Ribas, M. Rosu, H. Riege, T. Papaevangelou, J. G. Garza, Theodoros Vafeiadis, A. Belov, I. G. Irastorza, S. Aune, A. Gardikiotis, Krešimir Jakovčić, F. Haug, I. Savvidis, J. M. Laurent, Dieter H. H. Hoffmann, Peter Friedrich, S. Neff, Charles J. Hailey, M. J. Pivovaroff, Konstantin Zioutas, T. Dafni, Vassilis Anastassopoulos, J. Ruz, I. Giomataris, Klaus Kurt Desch, I. Lavrentyev, Finn Erland Christensen, C. Eleftheriadis, Ante Ljubičić, A. V. Dermenev, A. Upadhye, C. Krieger, Sami K. Solanki, J. M. Carmona, M. D. Hasinoff, Georgios Fanourakis, G. Cantatore, Evangelos Gazis, Jochen Kaminski, Anders Clemen Jakobsen, A. Krüger, A. Liolios, J. A. Garcia, Doğuş Üniversitesi, Fen Edebiyat Fakültesi, Fizik Bölümü, TR3959, Çetin, Serkant Ali, Anastassopoulos, V, Arik, M., Aune, S., Barth, K., Belov, A., Bräuninger, H., Cantatore, Giovanni, Carmona, J. M., Cetin, S. A., Christensen, F., Collar, J. I., Dafni, T., Davenport, M., Desch, K., Dermenev, A., Eleftheriadis, C., Fanourakis, G., Ferrer Ribas, E., Friedrich, P., Galán, J., García, J. A., Gardikiotis, A., Garza, J. G., Gazis, E. N., Geralis, T., Giomataris, I., Hailey, C., Haug, F., Hasinoff, M. D., Hoffmann, D. H. H., Iguaz, F. J., Irastorza, I. G., Jacoby, J., Jakobsen, A., Jakovčić, K., Kaminski, J., Karuza, M., Kavuk, M., Krčmar, M., Krieger, C., Krüger, A., Lakić, B., Laurent, J. M., Liolios, A., Ljubičić, A., Luzón, G., Neff, S., Ortega, I., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Riege, H., Rosu, M., Ruz, J., Savvidis, I., Solanki, S. K., Vafeiadis, T., Villar, J. A., Vogel, J. K., Yildiz, S. C., Zioutas, K., Brax, P., Lavrentyev, I., and Upadhye, A.

Subjects
Nuclear and High Energy Physics, Astrophysics and Astronomy, Photon, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, Tachocline, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics, 01 natural sciences, SDD, X-ray, High Energy Physics - Phenomenology (hep-ph), 0103 physical sciences, Chameleon, Dark energy, 010306 general physics, Axion, Solar and Stellar Astrophysics (astro-ph.SR), Primakoff effect, Coupling constant, Coupling, Physics, CAST, 010308 nuclear & particles physics, Instrumentation and Detectors (physics.ins-det), lcsh:QC1-999, High Energy Physics - Phenomenology, Astrophysics - Solar and Stellar Astrophysics, CERN Axion Solar Telescope, lcsh:Physics
Abstract

In this work we present a search for (solar) chameleons with the CERN Axion Solar Telescope (CAST). This novel experimental technique, in the field of dark energy research, exploits both the chameleon coupling to matter ($\beta_{\rm m}$) and to photons ($\beta_{\gamma}$) via the Primakoff effect. By reducing the X-ray detection energy threshold used for axions from 1$\,$keV to 400$\,$eV CAST became sensitive to the converted solar chameleon spectrum which peaks around 600$\,$eV. Even though we have not observed any excess above background, we can provide a 95% C.L. limit for the coupling strength of chameleons to photons of $\beta_{\gamma}\!\lesssim\!10^{11}$ for $1, Comment: 8 pages, 12 figures

Published
2015
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30. Improved search for solar chameleons with a GridPix detector at CAST

Author

Wolfgang Funk, Milica Krčmar, T. Geralis, M. Maroudas, S. C. Yildiz, I. G. Irastorza, Joachim Jacoby, Sofia Kostoglou, Babette Döbrich, Sergei Gninenko, Giovanni Cantatore, C. Krieger, Søren Schmidt, M. Davenport, Marin Karuza, I. Ortega, M. J. Pivovaroff, Konstantin Zioutas, C. J. Hailey, J. Ruz, S. Neff, L. Miceli, T. Papaevangelou, S. Aune, Georg G. Raffelt, T. Dafni, I. Savvidis, M. Vretenar, Klaus Kurt Desch, Biljana Lakić, A. Liolios, Georgios Fanourakis, Nenad Kralj, Alexander Dermenev, J. F. Castel, A. Belov, Krešimir Jakovčić, L. Stewart, Dieter Hoffmann, Sami K. Solanki, Heinrich Bräuninger, Serkant Ali Cetin, E. Ruiz Chóliz, F.J. Iguaz, Vassilis Anastassopoulos, H. Fischer, A. Gardikiotis, Yannis K. Semertzidis, M. D. Hasinoff, C. Eleftheriadis, Jochen Kaminski, Anders Clemen Jakobsen, K. Paraschou, E. Ferrer-Ribas, J. M. Carmona, Julia Vogel, Theodoros Vafeiadis, J. G. Garza, K. Barth, G. Luzón, Walter Wuensch, I. Giomataris, M. Rosu, P. Brax, Ante Ljubičić, J. M. Laurent, J. A. Garcia, Evangelos Gazis, Finn Erland Christensen, 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 Théorique - UMR CNRS 3681 (IPHT), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), CAST, Anastassopoulos, V., Aune, S., Barth, K., Belov, A., Bräuninger, H., Cantatore, G., Carmona, J. M., Castel, J. F., Cetin, S. A., Christensen, F., Dafni, T., Davenport, M., Dermenev, A., Desch, K., Döbrich, B., Eleftheriadis, C., Fanourakis, G., Ferrer-Ribas, E., Fischer, H., Funk, W., García, J. A., Gardikiotis, A., Garza, J. G., Gazis, E. N., Geralis, T., Giomataris, I., Gninenko, S., Hailey, C. J., Hasinoff, M. D., Hoffmann, D. H. H., Iguaz, F. J., Irastorza, I. G., Jakobsen, A., Jacoby, J., Jakovčić, K., Kaminski, J., Karuza, M., Kostoglou, S., Kralj, N., Krčmar, M., Krieger, C., Lakić, B., Laurent, J. M., Liolios, A., Ljubičić, A., Luzón, G., Maroudas, M., Miceli, L., Neff, S., Ortega, I., Papaevangelou, T., Paraschou, K., Pivovaroff, M. J., Raffelt, G., Rosu, M., Ruz, J., Chóliz, E. Ruiz, Savvidis, I., Schmidt, S., Semertzidis, Y. K., Solanki, S. K., Stewart, L., Vafeiadis, T., Vogel, J. K., Vretenar, M., Wuensch, W., Yildiz, S. C., Zioutas, K., and Brax, P.

Subjects
Physics - Instrumentation and Detectors, Photon, Physics::Instrumentation and Detectors, Solar luminosity, magnetic field, Astrophysics, 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), photon: coupling, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Astrophysics::Solar and Stellar Astrophysics, Detectors and Experimental Techniques, GridPix, dark energy, modified gravity, physics.ins-det, Solar physics, Physics, dark energy experiments, particle physics - cosmology connection, solar physics, Astronomy and Astrophysics, chameleon: solar, solar physic, Instrumentation and Detectors (physics.ins-det), Coupling (probability), transition: (axion photon), dark energy experiment, Beta (plasma physics), Physics::Space Physics, CAST, Astrophysics::Earth and Planetary Astrophysics, CERN Axion Solar Telescope, Particle Physics - Experiment, chameleon, Modified gravity, Particle physics, CERN Lab, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, photon: spectrum, coupling constant: upper limit, Tachocline, Astrophysics::Cosmology and Extragalactic Astrophysics, X-ray, Dark energy experiments, 0103 physical sciences, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Sensitivity (control systems), hep-ex, background, 010308 nuclear & particles physics, magnet, coupling: (axion 2photon), Particle physics - cosmology connection, axion: solar, tachocline, Energy (signal processing), experimental results
Abstract

We report on a new search for solar chameleons with the CERN Axion Solar Telescope (CAST). A GridPix detector was used to search for soft X-ray photons in the energy range from 200 eV to 10 keV from converted solar chameleons. No signiffcant excess over the expected background has been observed in the data taken in 2014 and 2015. We set an improved limit on the chameleon photon coupling, $\beta_\gamma < 5.7\times10^{10}$ for $1, Comment: 19 pages, 12 figures, 3 tables

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