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24 results on '"Brauninger, H."'

1. 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., and Zioutas, K.

Subjects
High Energy Physics - Experiment, Physics - Instrumentation and Detectors
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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2. Murine matrix metalloproteinase 13 and human matrix metalloproteinase 1 are involved in remodelling processes after myocardial infarction

Author

Brauninger, H, primary, Kruger, S, additional, Becher, P M, additional, Neumann, J T, additional, Bacmeister, L, additional, Voss, S, additional, Kupsch, S, additional, Zeller, T, additional, Lammle, S, additional, El-Armouche, A, additional, Kirchhof, P, additional, Blankenberg, S, additional, Westermann, D, additional, and Lindner, D, additional

Published
2024
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3. GPR15-dependent T cell recruitment in the acute phase of viral myocarditis is associated with improved virus elimination and outcome

Author

Lindner, D, primary, Brauninger, H, additional, Stoffers, B, additional, Bacmeister, L, additional, Kupsch, S, additional, Vico, T, additional, Marchini, T, additional, Escher, F, additional, Klingel, K, additional, Kirchhof, P, additional, Blankenberg, S, additional, Zeller, T, additional, Wolf, D, additional, Hilgendorf, I, additional, and Westermann, D, additional

Published
2024
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4. 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, Astrophysics - Instrumentation and Methods for Astrophysics, Physics - Instrumentation and Detectors
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 <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_ag < 3.3 x 10^{-10} GeV^{-1} at 95% CL, 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, for example by the currently discussed next generation helioscope IAXO., Comment: 5 pages, 2 figures. Last version uploaded

Published
2013
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5. CAST constraints on the axion-electron coupling

Author

Barth, K., Belov, A., Beltran, B., Brauninger, H., Carmona, J. M., Collar, J. I., Dafni, T., Davenport, M., Di Lella, L., Eleftheriadis, C., Englhauser, J., Fanourakis, G., Ribas, E. Ferrer, Fischer, H., Franz, J., Friedrich, P., Galan, J., Garcia, J. A., Geralis, T., Giomataris, I., Gninenko, S., Gomez, H., Hassinoff, M. D., Heinsius, F. H., Hoffmann, D. H. H., Irastorza, I. G., Jacoby, J., Jakovcic, K., Kang, D., Konigsmann, K., Kotthaus, R., Kousouris, K., Krcmar, M., Kuster, M., Lakic, B., Liolios, A., Ljubicic, A., Lutz, G., Luzon, G., Miller, D. W., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Redondo, J., Riege, H., Rodriguez, A., Ruz, J., Savvidis, I., Semertzidis, Y., Stewart, L., Van Bibber, K., Vieira, J. D., Villar, J. A., Vogel, J. K., Walckiers, L., and Zioutas, K.

Subjects
Astrophysics - Solar and Stellar Astrophysics, High Energy Physics - Phenomenology
Abstract

In non-hadronic axion models, which have a tree-level axion-electron interaction, the Sun produces a strong axion flux by bremsstrahlung, Compton scattering, and axio-recombination, the "BCA processes." Based on a new calculation of this flux, including for the first time axio-recombination, we derive limits on the axion-electron Yukawa coupling g_ae and axion-photon interaction strength g_ag using the CAST phase-I data (vacuum phase). For m_a < 10 meV/c2 we find g_ag x g_ae< 8.1 x 10^-23 GeV^-1 at 95% CL. We stress that a next-generation axion helioscope such as the proposed IAXO could push this sensitivity into a range beyond stellar energy-loss limits and test the hypothesis that white-dwarf cooling is dominated by axion emission.

Published
2013
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6. Search for solar axion emission from 7Li and D(p,gamma)3He nuclear decays with the CAST gamma-ray calorimeter

Author

CAST Collaboration, Andriamonje, S., Aune, S., Autiero, D., Barth, K., Belov, A., Beltran, B., Brauninger, H., Carmona, J. M., Cebrian, S., Collar, J. I., Dafni, T., Davenport, M., Lella, L. Di., Eleftheriadis, C., Englhauser, J., Fanourakis, G., Ribas, E. Ferrer., Fischer, H., Franz, J., Friedrich, P., Geralis, T., Giomataris, I., Gninenko, S., Gomez, H., Hasinoff, M., Heinsius, F. H., Hoffmann, D. H. H., Irastorza, I. G., Jacoby, J., Jakovcic, K., Kang, D., 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, J., Ortiz, A., Papaevangelou, T., Placci, A., Raffelt, G., Riege, H., Rodriguez, A., Ruz, J., Savvidis, I., Semertzidis, Y., Serpico, P., Stewart, L., Vieira, J. D., Villar, J., Vogel, J., Walckiers, L., and Zioutas, K.

Subjects
High Energy Physics - Experiment
Abstract

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

Published
2009
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7. The SWIFT Gamma-Ray Burst X-Ray Telescope

Author

Hill, J. E, Burrows, D. N, Nousek, J. A, Wells, A, Chincarini, G, Abbey, A. F, Angelini, L, Beardmore, A, Brauninger, H. W, and Chang, W

Subjects
Space Sciences (General)
Abstract

The Swift Gamma-Ray Burst Explorer is designed to make prompt multi-wavelength observations of Gamma-Ray Bursts and GRB afterglows. The X-ray Telescope enables Swift to determine GRB positions with a few arcseconds accuracy within 100 seconds of the burst onset. The XRT utilizes a mirror set built for JET-X and an XMM-Newton/ EPIC MOS CCD detector to provide a sensitive broad-band (0.2-10 keV) X-ray imager with an effective area of more than 120 sq cm at 1.5 keV, a field of view of 23.6 x 23.6 arcminutes, and an angular resolution of 18 arcseconds (HPD). The detection sensitivity is 2x10(exp 14) erg/sq cm/s in 10(exp 4) seconds. The instrument provides automated source detection and position reporting within 5 seconds of target acquisition. It can also measure the redshifts of GRBs with Iron line emission or other spectral features. The XRT operates in an auto-exposure mode, adjusting the CCD readout mode automatically to optimize the science return as the source intensity fades. The XRT measures spectra and lightcurves of the GRB afterglow beginning about a minute after the burst and follows each burst for days or weeks. We provide an overview of the X-ray Telescope scientific background from which the systems engineering requirements were derived, with specific emphasis on the design and qualification aspects from conception through to launch. We describe the impact on cleanliness and vacuum requirements for the instrument low energy response and to maintain the high sensitivity to the fading signal of the Gamma-ray Bursts.

Published
2006

8. X-ray survey of the Large Magellanic Cloud by ROSAT

Author

Trumper, J., Hasinger, G., Aschenbach, B., Brauninger, H., Briel, U.G., Burkert, W., Fink, H., Pfeffermann, E., Pietsch, W., Predehl, P., Schmitt, J.H.M.M., Voges, W., Zimmermann, U., and Beuermann, K.

Subjects
Rosat (Artificial satellite) -- Observations, X-rays -- Spectra, X-ray astronomy -- Research, X-ray telescope -- Observations, Magellanic Clouds -- Observations, Supernova remnants -- Research, Environmental issues, Science and technology, Zoology and wildlife conservation
Published
1991

9. CAST: Recent results & future outlook

Author

Papaevangelou, T., Aune, S., Barth, K., Belov, A., Borghi, S., Brauninger, H., Cantatore, Giovanni, Carmona, J. M., Cetin, S. A., Collar, J. I., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Ezer, C., Fanourakis, G., Ferrer Ribas, E., Fischer, H., Franz, J., Friedrich, P., Galan, J., Gardikiotis, A., Gazis, E. N., Geralis, T., Giomataris, I., Gninenko, S., Gomez, H., Gruber, E., Guthorl, T., Hartmann, R., Haug, F., Hasinoff, M., Hoffmann, D. H. H., Iguaz, J., Irastorza, I. G., Jacoby, J., Jakovcic, K., Kang, D., Karageorgopoulou, T., Karuza, M., Konigsmann, K., Kotthaus, R., Krcmar, M., Kousouris, K., Kuster, M., Lakic, B., Lang, P., Lasseur, C., Laurent, J. M., Liolios, A., Ljubicic, A., Lozza, Valentina, Lutz, G., Luzon, G., Miller, D. W., Mirizzi, A., Morales, J., Niinikoski, T., Nordt, A., Pivovaroff, M., Raiteri, G., Raffelt, G., Rashba, T., Riege, H., Rodriguez, A., Rosu, M., Ruz, J., Savvidis, I., Semertzidis, Y., Serpico, P., Silva, P. S., Solanki, S. K., Soufli, R., Stewart, L., Tomas, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J. K., Walckiers, L., Wong, Y., Yildiz, S. C., Zioutas, K., L. Baudis, M. Schumann, Papaevangelou, T., Aune, S., Barth, K., Belov, A., Borghi, S., Brauninger, H., Cantatore, Giovanni, Carmona, J. M., Cetin, S. A., Collar, J. I., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Ezer, C., Fanourakis, G., Ferrer Ribas, E., Fischer, H., Franz, J., Friedrich, P., Galan, J., Gardikiotis, A., Gazis, E. N., Geralis, T., Giomataris, I., Gninenko, S., Gomez, H., Gruber, E., Guthorl, T., Hartmann, R., Haug, F., Hasinoff, M., Hoffmann, D. H. H., Iguaz, J., Irastorza, I. G., Jacoby, J., Jakovcic, K., Kang, D., Karageorgopoulou, T., Karuza, M., Konigsmann, K., Kotthaus, R., Krcmar, M., Kousouris, K., Kuster, M., Lakic, B., Lang, P., Lasseur, C., Laurent, J. M., Liolios, A., Ljubicic, A., Lozza, Valentina, Lutz, G., Luzon, G., Miller, D. W., Mirizzi, A., Morales, J., Niinikoski, T., Nordt, A., Pivovaroff, M., Raiteri, G., Raffelt, G., Rashba, T., Riege, H., Rodriguez, A., Rosu, M., Ruz, J., Savvidis, I., Semertzidis, Y., Serpico, P., Silva, P. S., Solanki, S. K., Soufli, R., Stewart, L., Tomas, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J. K., Walckiers, L., Wong, Y., Yildiz, S. C., and Zioutas, K.

Subjects
axions, astroparticle physics, axion, solar physic, astroparticle physic, solar physics, dark matter
Abstract

The CAST (CERN Axion Solar Telescope) experiment is searching for solar axions by their conversion into photons inside the magnet pipes of an LHC dipole. The analysis of data taken so far has shown no signal above the background, thus implying an upper limit to the axion-photon coupling of gaγ < 0.85 × 10−10GeV −1 at 95% CL for ma < 0.02 eV/c2. Ongoing measurements, with the magnet bores filled with a buffer gas (3He), are improving the sensitivity of the experiment for higher axion masses towards 1 eV/c2. Recent results, new ideas for Axion-Like Particle (WISPs) searches with CAST in the near future and the prospects of a new generation Helioscope are presented here.

Published
2010

10. 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

11. CAST: Status and latest results

Author

Dafni, T., Aune, S., Davenport, M., Eleftheriadis, C., Elias, N., Ezer, C., Fanourakis, G., Ferrer-Ribas, E., Friedrich, P., Galan, J., Garcia, J. A., Gardikiotis, A., Barth, K., Gazis, E. N., Geralis, T., Giomataris, I., Gninenko, S., Gomez, H., Gruber, E., Guthorl, T., Hartmann, R., Haug, F., Hasinoff, M. D., Belov, A., Hoffmann, D. H. H., Iguaz, F. J., Irastorza, I. G., Jacoby, J., Jakovcic, K., Karuza, M., Konigsmann, K., Kotthaus, R., Krcmar, M., Kuster, M., Borghi, S., Lakic, B., Laurent, J. M., Liolios, A., Ljubicic, A., Lozza, V., Lutz, G., Luzon, G., Morales, J., Niinikoski, T., Nordt, A., Brauninger, H., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Rashba, T., Riege, H., Rodriguez, A., Rosu, M., Ruz, J., Savvidis, I., Silva, P. S., Cantatore, G., Solanki, S. K., Stewart, L., Tomas, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J. K., Yildiz, S. C., Zioutas, K., Carmona, J. M., CAST Collaboration, Cetin, S. A., Collar, J. I., K. Zioutas, M. Schumann, T., Dafni, S., Aune, K., Barth, A., Belov, S., Borghi, H., Brauninger, Cantatore, Giovanni, J. M., Carmona, S. A., Cetin, J. I., Collar, M., Davenport, C., Eleftheriadi, N., Elia, C., Ezer, G., Fanouraki, E., Ferrer Riba, P., Friedrich, J., Galan, J. A., Garcia, A., Gardikioti, E. N., Gazi, T., Gerali, I., Giomatari, S., Gninenko, H., Gomez, E., Gruber, T., Guthorl, R., Hartmann, 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, J. M., Laurent, A., Liolio, A., Ljubicic, V., Lozza, G., Lutz, G., Luzon, J., Morale, T., Niinikoski, A., Nordt, T., Papaevangelou, M. J., Pivovaroff, G., Raffelt, T., Rashba, H., Riege, A., Rodriguez, M., Rosu, J., Ruz, I., Savvidi, 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
WISPs, solar axion, WISP, Physics, photon detectors, solar axions
Abstract

In July 2011, CAST finished the data-taking of its nominal programme, having scanned axion masses up to ~1.18 eV/c**2. Here we present the first results of the data taken in 2008, first year of the last data-taking campaign when $^3$He was used inside the magnet bores. No excess of signal over background has been recorded, and an upper limit has been set to the axion-to-photon coupling to 2.3*10**-10 GeV**-1 for axion masses between 0.39 and 0.64 eV. CAST remains the most sensitive axion helioscope and for the first time crosses the benchmark line of the KSVZ model at the upper end of the spectrum., Proc. of Patras Workshop on Axions, WIMPs and WISPs, 93 - 97; DESY-PROC-2011-04; ISSN 1435-8077

Published
2011
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12. CAST: Recent results & future outlook

Author

Papaevangelou, Thomas, Aune, S., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Ezer, C., Fanourakis, G., Ferrer-Ribas, E., Fischer, H., Franz, J., Friedrich, P., Barth, K., Galan, J., Gardikiotis, A., Gazis, E. N., Geralis, T., Giomataris, I., Gninenko, S., Gomez, H., Gruber, E., Guthorl, T., Hartmann, R., Belov, A., Haug, F., Hasinoff, M., Hoffmann, D. H. H., Iguaz, J., Irastorza, I. G., Jacoby, J., Jakovcic, K., Kang, D., Karageorgopoulou, T., Karuza, M., Borghi, S., Konigsmann, K., Kotthaus, R., Krcmar, M., Kousouris, K., Kuster, M., Lakic, B., Lang, P., Lasseur, C., Laurent, J. M., Liolios, A., Brauninger, H., Ljubicic, A., Lozza, V., Lutz, G., Luzon, G., Miller, D. W., Mirizzi, A., Morales, J., Niinikoski, T., Nordt, A., Pivovaroff, M., Cantatore, G., Raiteri, G., Raffelt, G., Rashba, T., Riege, H., Rodriguez, A., Rosu, M., Ruz, J., Savvidis, I., Semertzidis, Y., Serpico, P., Carmona, J. M., Silva, P. S., Solanki, S, K., Soufli, R., Stewart, L., Tomas, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J., Vogel, J. K., Cetin, S. A., Walckiers, L., Wong, Y., Yildiz, S. C., Zioutas, K., CAST Collaboration, and Collar, J. I.

Published
2010
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13. 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

14. 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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15. CAST: a search for solar axions at CERN

Author

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., de 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, K., 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., 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 Flores, Sylvie

Subjects
Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, Astrophysics (astro-ph), FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Astrophysics, High Energy Physics - Experiment, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], High Energy Physics - Phenomenology, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), [PHYS.ASTR.CO] Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Nuclear Experiment (nucl-ex), Nuclear 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., Comment: Presented at the SPIE conference on Astronomical Telescopes and Instrumentation, Waikoloa, Hawaii, 2002. 5 pages, 4 figures

Published
2002

16. The CAST experiment

Author

Ruz, J., Arik, E., Aune, S., Autiero, D., Barth, K., Belov, A., Beltran, B., Borghi, S., Bourlis, G., Boydag, F.S., Brauninger, H., Carmona, J., Cebrian, S., Cetin, S.A., Collar, J.I., Dafni, T., Davenport, M., Di Lella, L., Dogan, O.B., Eleftheriadis, C., Fanourakis, G., Ferrer Ribas, E., Fischer, H., Franz, J., Galan, J., Geralis, T., Giomataris, I., Gninenko, S., Gomez, H., Hasinoff, M., Heinsius, F.H., Hikmet, I., Gazis, E., Hoffmann, D.H.H., Irastorza, I.G., Jacoby, J., Jakovčić, Krešimir, Kang, D., Konigsmann, K., Kotthaus, R., Krčmar, Milica, Kousouris, K., Kuster, M., Lakić, Biljana, Lasseur, C., Liolios, A., Ljubičić, Ante, Lutz, G., Luzon, G., Miller, D., Morales, A., Morales, J., Niinikoski, T., Nordt, A., Ortiz, A., Papaevangelou, T., Pivovaroff, M., Placci, A., Raitieri, G., Raffelt, G., Riege, H., Rodriguez, A., Savvidis, I., Semertzidis, Y., Serpico, P., Soufli, R., Stewart, L., Tzamarias, K., van Bibber, K., Villar, J., Vogel, J., Walckiers, L., and Zioutas, K.

Subjects
Physics, History, Helioscope, Particle physics, axions, axion-photon coupling, solar axion telescope, Photon, Large Hadron Collider, Computer Science Applications, Education, Massless particle, Solar core, CERN Axion Solar Telescope, Axion, Primakoff effect
Abstract

CAST (CERN Axion Solar Telescope) is a helioscope looking for axions coming from the solar core to the Earth. The experiment, located at CERN, is based on the Primakoff effect and uses a magnetic field of 9 Tesla provided by a decommissioned LHC magnet. CAST is able to follow the Sun during sunrise and sunset and therefore three X-ray detectors are mounted on both ends of the magnet waiting for a photon from axion-to-photon conversion due to the Primakoff effect. During its first phase, which concluded in 2004, CAST has been looking for axions with masses up to 0.02 eV. CAST’ s second phase manages to re-establish the coherence needed to scan for axions with masses up to 1.16 eV by using a buffer gas. This technique enables the experiment to look into the theoretical regions for axions. During the years 2005 and 2006, the use of 4He in CAST has already provided coherence in order to look for axions with masses up to 0.4 eV.

Published
2008
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17. CAST status report: A solar axion search using a decommissioned LHC test magnet

Author

Fanourakis, G., Geralis, T., Zachariadou, K., Aalseth, C. E., Avignone, F. T., Creswick, R., Farach, H., Hoffmann, D., Jacoby, J., Mutterer, M., Autiero, D., Barth, K., Delattre, M., Oliveira, R., Di Lella, L., Placci, A., Riege, H., Vullierme, B., Walckiers, L., Zioutas, K., Arik, E., Celebi, G., Cetin, S., Erduran, N., Mailov, A., Girard, T. A., Valko, P., Fiorini, C., Longoni, A., Sampietro, M., Gninenko, S. N., Golubev, N. A., Kovzelev, A. V., Matveev, V. A., Lutz, G., Brauninger, H., Raffelt, G. G., Delbart, A., Giomataris, I., Papadopoulos, I., Collar, J. I., Bowyer, S. M., Brodzinski, R. L., Knopf, M. A., Miley, H. S., Pitts, W. K., Thomas Girard, Thompson, R. C., Wilcox, W., Nussinov, S., Liolios, A., Nikas, D., Nikolaidis, A., Polymeris, G., Savvidis, I., Hasinoff, M., Jakovcic, K., Krcmar, M., Krecak, Z., Lakic, B., Ljubicic, A., Stipcevic, M., Carmona, J. M., Cebrian, S., Garcia, E., Irastorza, I. G., Luzon, G., Morales, A., Morales, J., Ortiz, A., Puimedon, J., Sarsa, M., Scopel, S., and Villar, J. A.

Subjects
Detectors and Experimental Techniques

18. Search for solar axions with the CAST-experiment

Author

Vogel, J., Arik, E., Aune, S., Autiero, D., Barth, K., Belov, A., Beltran, B., Borghi, S., Bourlis, G., Boydag, F. S., Brauninger, H., Carmona, J., Cebriin, S., Cetin, S. A., Collar, J. I., Dafni, T., Davenport, M., Di Lella, L., Dopan, O. B., Eleftheriadis, C., Elias, N., Fanourakis, G., Ferrer-Ribas, E., Fischer, H., Franz, J., Galdn, J., Geralis, T., Giomataris, I., Gninenko, S., Gbmez, H., Hasinoff, M., H Heinsius, F., Hikmet, I., Hoffmann, D. H. H., Irastorza, I. G., Jacoby, J., Jakovcic, K., Kang, D., Konigsmann, K., Kotthaus, R., Krcmar, M., Kousouris, K., Kuster, M., Lakic, B., Lasseur, C., Liolios, A., Ljubicic, A., Lutz, G., Luzbn, G., Miller, D., Morales, A., Morales, J., Niinikoski, T., Nordt, A., Ortiz, A., Papaevangelou, T., Michael Pivovaroff, Placci, A., Raffelt, G., Riege, H., Rodriguez, A., Ruz, J., Savvidis, I., Semertzidis, Y., Serpico, P., Soufli, R., Stewart, L., Tzamarias, S., Bibber, K., Villar, J., Walckiers, L., and Zioutas, K.

19. 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.

21. 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

22. Search for Sub-eV Mass Solar Axions by the CERN Axion Solar Telescope with (3)He Buffer Gas

Author

M, Arik, S, Aune, K, Barth, A, Belov, S, Borghi, H, Bräuninger, G, Cantatore, J M, Carmona, S A, Cetin, J I, Collar, T, Dafni, M, Davenport, C, Eleftheriadis, N, Elias, C, Ezer, G, Fanourakis, E, Ferrer-Ribas, P, Friedrich, J, Galán, J A, García, A, Gardikiotis, E N, Gazis, T, Geralis, I, Giomataris, S, Gninenko, H, Gómez, E, Gruber, T, Guthörl, R, Hartmann, F, Haug, M D, Hasinoff, D H H, Hoffmann, F J, Iguaz, I G, Irastorza, J, Jacoby, K, Jakovčić, M, Karuza, K, Königsmann, R, Kotthaus, M, Krčmar, M, Kuster, B, Lakić, J M, Laurent, A, Liolios, A, Ljubičić, V, Lozza, G, Lutz, G, Luzón, J, Morales, T, Niinikoski, A, Nordt, T, Papaevangelou, M J, Pivovaroff, G, Raffelt, T, Rashba, H, Riege, A, Rodríguez, M, Rosu, J, Ruz, I, Savvidis, P S, Silva, S K, Solanki, L, Stewart, A, Tomás, M, Tsagri, K, van Bibber, T, Vafeiadis, J A, Villar, J K, Vogel, S C, Yildiz, K, Zioutas, Arik, M., Aune, S., Barth, K., Belov, A., Borghi, S., Brauninger, H., Cantatore, Giovanni, Carmona, J. M., Cetin, S. A., Collar, J. I., Dafni, T., Davenport, M., Eleftheriadis, C., Elias, N., Ezer, C., Fanourakis, G., Ferrer Ribas, E., Friedrich, P., Galan, J., Garcia, J. A., Gardikiotis, A., Gazis, E. N., Geralis, T., Giomataris, I., Gninenko, S., Gomez, H., Gruber, E., Guthorl, T., Hartmann, R., 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., Laurent, J. M., Liolios, A., Ljubicic, A., Lozza, Valentina, Lutz, G., Luzon, G., Morales, J., Niinikoski, T., Nordt, A., Papaevangelou, T., Pivovaroff, M. J., Raffelt, G., Rashba, T., Riege, H., Rodriguez, A., Rosu, M., Ruz, J., Savvidis, I., Silva, P. S., Solanki, S. K., Stewart, L., Tomas, A., Tsagri, M., van Bibber, K., Vafeiadis, T., Villar, J. A., Vogel, J. K., Yildiz, S. C., and Zioutas, K.

Subjects
solar axion, low background detectors, solar axions, photons, dark matter
Abstract

The CERN Axion Solar Telescope (CAST) has extended its search for solar axions by using (3)He as a buffer gas. At T=1.8 K this allows for larger pressure settings and hence sensitivity to higher axion masses than our previous measurements with (4)He. With about 1 h of data taking at each of 252 different pressure settings we have scanned the axion mass range 0.39 eV≲m(a)≲0.64 eV. 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(aγ)≲2.3×10(-10) GeV(-1) at 95% C.L., the exact value depending on the pressure setting. Kim-Shifman-Vainshtein-Zakharov axions are excluded at the upper end of our mass range, the first time ever for any solar axion search. In the future we will extend our search to m(a)≲1.15 eV, comfortably overlapping with cosmological hot dark matter bounds.

Published
2011

23. Grazing incidence replica optics for astronomical and laboratory applications.

Author

Hudec R, Valnicek B, Aschenbach B, Brauninger H, and Burkert W

Abstract

Replica technology was developed for manufacturing numerous low-cost grazing incidence x-ray mirrors for both laboratory and astrophysical experiments. About forty mirrors with apertures between 1.7 and 24 cm have so far been made. The results of tests both at optical and x-ray wavelengths indicate that replica optics is well suited for space and laboratory uses.

Published
1988
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24. Optics for the x-ray imaging concentrators aboard the x-ray astronomy satellite SAX.

Author

Citterio O, Bonelli G, Conti G, Mattaini E, Santambrogio E, Sacco B, Lanzara E, Brauninger H, and Burkert W

Abstract

The scientific instrumentation onboard the Italian satellite for x-ray astronomy (SAX) foresees x-ray imaging concentrators operating in the 0.1-10-keV energy range with a spatial resolution of 1 min of arc. The optics is composed of thirty confocal-nested very thin double-cone mirrors. To achieve good optical quality and to allow the construction of several concentrators at an acceptable cost, a replica technique by electroforming the mirrors from masters is used. This paper presents the results obtained from a set of electroformed mirrors mounted on a concentrator prototype.

Published
1988
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