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Correa J, Mehrjoo M, Battistelli R, Lehmkühler F, Marras A, Wunderer CB, Hirono T, Felk V, Krivan F, Lange S, Shevyakov I, Vardanyan V, Zimmer M, Hoesch M, Bagschik K, Guerrini N, Marsh B, Sedgwick I, Cautero G, Stebel L, Giuressi D, Menk RH, Greer A, Nicholls T, Nichols W, Pedersen U, Shikhaliev P, Tartoni N, Hyun HJ, Kim SH, Park SY, Kim KS, Orsini F, Iguaz FJ, Büttner F, Pfau B, Plönjes E, Kharitonov K, Ruiz-Lopez M, Pan R, Gang S, Keitel B, Graafsma H. The PERCIVAL detector: first user experiments. J Synchrotron Radiat 2023; 30:242-250. [PMID: 36601943 PMCID: PMC9814071 DOI: 10.1107/s1600577522010347] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 10/26/2022] [Indexed: 06/17/2023]
Abstract
The PERCIVAL detector is a CMOS imager designed for the soft X-ray regime at photon sources. Although still in its final development phase, it has recently seen its first user experiments: ptychography at a free-electron laser, holographic imaging at a storage ring and preliminary tests on X-ray photon correlation spectroscopy. The detector performed remarkably well in terms of spatial resolution achievable in the sample plane, owing to its small pixel size, large active area and very large dynamic range; but also in terms of its frame rate, which is significantly faster than traditional CCDs. In particular, it is the combination of these features which makes PERCIVAL an attractive option for soft X-ray science.
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Affiliation(s)
- J. Correa
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - M. Mehrjoo
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - R. Battistelli
- Helmholtz Zentrum Berlin HZB, Hahn-Meitner-Platz 1, Berlin, Germany
| | - F. Lehmkühler
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- The Hamburg Centre for Ultrafast Imaging CUI, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - A. Marras
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - C. B. Wunderer
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - T. Hirono
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - V. Felk
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - F. Krivan
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - S. Lange
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - I. Shevyakov
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - V. Vardanyan
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - M. Zimmer
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - M. Hoesch
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - K. Bagschik
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - N. Guerrini
- Science and Technology Faculties STFC, Rutherford Appleton Laboratory RAL, Didcot, United Kingdom
| | - B. Marsh
- Science and Technology Faculties STFC, Rutherford Appleton Laboratory RAL, Didcot, United Kingdom
| | - I. Sedgwick
- Science and Technology Faculties STFC, Rutherford Appleton Laboratory RAL, Didcot, United Kingdom
| | - G. Cautero
- Elettra Sincrotrone Trieste, Trieste, Italy
| | - L. Stebel
- Elettra Sincrotrone Trieste, Trieste, Italy
| | | | - R. H. Menk
- Elettra Sincrotrone Trieste, Trieste, Italy
- University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 5A2
| | - A. Greer
- Observatory Sciences Ltd, Cambridge, United Kingdom
| | - T. Nicholls
- Science and Technology Faculties STFC, Rutherford Appleton Laboratory RAL, Didcot, United Kingdom
| | - W. Nichols
- Diamond Light Source, Didcot, United Kingdom
| | - U. Pedersen
- Diamond Light Source, Didcot, United Kingdom
| | | | - N. Tartoni
- Diamond Light Source, Didcot, United Kingdom
| | - H. J. Hyun
- Pohang Accelerator Laboratory PAL, Pohang, Gyeongbuk 37673, Republic of Korea
| | - S. H. Kim
- Pohang Accelerator Laboratory PAL, Pohang, Gyeongbuk 37673, Republic of Korea
| | - S. Y. Park
- Pohang Accelerator Laboratory PAL, Pohang, Gyeongbuk 37673, Republic of Korea
| | - K. S. Kim
- Pohang Accelerator Laboratory PAL, Pohang, Gyeongbuk 37673, Republic of Korea
| | - F. Orsini
- Synchrotron SOLEIL, Saint Aubin, France
| | | | - F. Büttner
- Helmholtz Zentrum Berlin HZB, Hahn-Meitner-Platz 1, Berlin, Germany
| | - B. Pfau
- Max-Born-Institute MBI, Max-Born-Straße 2A, Berlin, Germany
| | - E. Plönjes
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - K. Kharitonov
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - M. Ruiz-Lopez
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - R. Pan
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - S. Gang
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - B. Keitel
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
| | - H. Graafsma
- Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestrasse 85, 22607 Hamburg, Germany
- Mid Sweden University, Sundsvall, Sweden
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2
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Iguaz FJ, Garza JG, Aznar F, Castel JF, Cebrián S, Dafni T, García JA, Irastorza IG, Lagraba A, Luzón G, Peiró A. TREX-DM: a low-background Micromegas-based TPC for low-mass WIMP detection. Eur Phys J C Part Fields 2016; 76:529. [PMID: 28316484 PMCID: PMC5335542 DOI: 10.1140/epjc/s10052-016-4372-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2015] [Accepted: 09/11/2016] [Indexed: 06/06/2023]
Abstract
If Dark Matter is made of Weakly Interacting Massive Particles (WIMPs) with masses below [Formula: see text] GeV, the corresponding nuclear recoils in mainstream WIMP experiments are of energies too close, or below, the experimental threshold. Gas Time Projection Chambers (TPCs) can be operated with a variety of target elements, offer good tracking capabilities and, on account of the amplification in gas, very low thresholds are achievable. Recent advances in electronics and in novel radiopure TPC readouts, especially micro-mesh gas structure (Micromegas), are improving the scalability and low-background prospects of gaseous TPCs. Here we present TREX-DM, a prototype to test the concept of a Micromegas-based TPC to search for low-mass WIMPs. The detector is designed to host an active mass of [Formula: see text] kg of Ar at 10 bar, or alternatively [Formula: see text] kg of Ne at 10 bar, with an energy threshold below 0.4 keVee, and is fully built with radiopure materials. We will describe the detector in detail, the results from the commissioning phase on surface, as well as a preliminary background model. The anticipated sensitivity of this technique may go beyond current experimental limits for WIMPs of masses of 2-8 GeV.
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Affiliation(s)
- F. J. Iguaz
- Grupo de Física Nuclear y Astropartículas, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - J. G. Garza
- Grupo de Física Nuclear y Astropartículas, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - F. Aznar
- Grupo de Física Nuclear y Astropartículas, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
- Centro Universitario de la Defensa, Universidad de Zaragoza, Crta. de Huesca s/n, 50090 Zaragoza, Spain
| | - J. F. Castel
- Grupo de Física Nuclear y Astropartículas, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - S. Cebrián
- Grupo de Física Nuclear y Astropartículas, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - T. Dafni
- Grupo de Física Nuclear y Astropartículas, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - J. A. García
- Grupo de Física Nuclear y Astropartículas, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - I. G. Irastorza
- Grupo de Física Nuclear y Astropartículas, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - A. Lagraba
- Grupo de Física Nuclear y Astropartículas, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - G. Luzón
- Grupo de Física Nuclear y Astropartículas, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
| | - A. Peiró
- Grupo de Física Nuclear y Astropartículas, Universidad de Zaragoza, C/Pedro Cerbuna 12, 50009 Zaragoza, Spain
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3
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Arik M, Aune S, Barth K, Belov A, Borghi S, Bräuninger H, Cantatore G, Carmona JM, Cetin SA, Collar JI, Da Riva E, Dafni T, Davenport M, Eleftheriadis C, Elias N, Fanourakis G, Ferrer-Ribas E, Friedrich P, Galán J, García JA, Gardikiotis A, Garza JG, Gazis EN, Geralis T, Georgiopoulou E, Giomataris I, Gninenko S, Gómez H, Gómez Marzoa M, Gruber E, Guthörl T, Hartmann R, Hauf S, Haug F, Hasinoff MD, Hoffmann DHH, Iguaz FJ, Irastorza IG, Jacoby J, Jakovčić K, Karuza M, Königsmann K, Kotthaus R, Krčmar M, Kuster M, Lakić B, Lang PM, Laurent JM, Liolios A, Ljubičić A, Luzón G, Neff S, Niinikoski T, Nordt A, Papaevangelou T, Pivovaroff MJ, Raffelt G, Riege H, Rodríguez A, Rosu M, Ruz J, Savvidis I, Shilon I, Silva PS, Solanki SK, Stewart L, Tomás A, Tsagri M, van Bibber K, Vafeiadis T, Villar J, Vogel JK, Yildiz SC, Zioutas K. Search for solar axions by the CERN axion solar telescope with 3He buffer gas: closing the hot dark matter gap. Phys Rev Lett 2014; 112:091302. [PMID: 24655238 DOI: 10.1103/physrevlett.112.091302] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2013] [Indexed: 06/03/2023]
Abstract
The CERN Axion Solar Telescope has finished its search for solar axions with (3)He buffer gas, covering the search range 0.64 eV ≲ ma ≲ 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 gaγ ≲ 3.3 × 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 gaγ, for example by the currently discussed next generation helioscope International AXion Observatory.
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Affiliation(s)
- M Arik
- Dogus University, Istanbul, Turkey
| | - S Aune
- IRFU, Centre d'Études Nucléaires de Saclay (CEA-Saclay), Gif-sur-Yvette, France
| | - K Barth
- European Organization for Nuclear Research (CERN), Genève, Switzerland
| | - A Belov
- Institute for Nuclear Research (INR), Russian Academy of Sciences, Moscow, Russia
| | - S Borghi
- European Organization for Nuclear Research (CERN), Genève, Switzerland
| | - H Bräuninger
- Max-Planck-Institut für Extraterrestrische Physik, Garching, Germany
| | - G Cantatore
- Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Trieste and Università di Trieste, Trieste, Italy
| | - J M Carmona
- Grupo de Investigación de Física Nuclear y Astropartículas, Universidad de Zaragoza, Zaragoza, Spain
| | | | - J I Collar
- Enrico Fermi Institute and KICP, University of Chicago, Chicago, Illinois 60637, Illinois, USA
| | - E Da Riva
- European Organization for Nuclear Research (CERN), Genève, Switzerland
| | - T Dafni
- Grupo de Investigación de Física Nuclear y Astropartículas, Universidad de Zaragoza, Zaragoza, Spain
| | - M Davenport
- European Organization for Nuclear Research (CERN), Genève, Switzerland
| | | | - N Elias
- European Organization for Nuclear Research (CERN), Genève, Switzerland
| | - G Fanourakis
- National Center for Scientific Research "Demokritos", Athens, Greece
| | - E Ferrer-Ribas
- IRFU, Centre d'Études Nucléaires de Saclay (CEA-Saclay), Gif-sur-Yvette, France
| | - P Friedrich
- Max-Planck-Institut für Extraterrestrische Physik, Garching, Germany
| | - J Galán
- IRFU, Centre d'Études Nucléaires de Saclay (CEA-Saclay), Gif-sur-Yvette, France and Grupo de Investigación de Física Nuclear y Astropartículas, Universidad de Zaragoza, Zaragoza, Spain
| | - J A García
- Grupo de Investigación de Física Nuclear y Astropartículas, Universidad de Zaragoza, Zaragoza, Spain
| | - A Gardikiotis
- Physics Department, University of Patras, Patras, Greece
| | - J G Garza
- Grupo de Investigación de Física Nuclear y Astropartículas, Universidad de Zaragoza, Zaragoza, Spain
| | - E N Gazis
- National Technical University of Athens, Athens, Greece
| | - T Geralis
- National Center for Scientific Research "Demokritos", Athens, Greece
| | | | - I Giomataris
- IRFU, Centre d'Études Nucléaires de Saclay (CEA-Saclay), Gif-sur-Yvette, France
| | - S Gninenko
- Institute for Nuclear Research (INR), Russian Academy of Sciences, Moscow, Russia
| | - H Gómez
- Grupo de Investigación de Física Nuclear y Astropartículas, Universidad de Zaragoza, Zaragoza, Spain
| | - M Gómez Marzoa
- European Organization for Nuclear Research (CERN), Genève, Switzerland
| | - E Gruber
- Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
| | - T Guthörl
- Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
| | | | - S Hauf
- Technische Universität Darmstadt, IKP, Darmstadt, Germany
| | - F Haug
- European Organization for Nuclear Research (CERN), Genève, Switzerland
| | - M D Hasinoff
- Department of Physics and Astronomy, University of British Columbia, Vancouver, Canada
| | - D H H Hoffmann
- Technische Universität Darmstadt, IKP, Darmstadt, Germany
| | - F J Iguaz
- IRFU, Centre d'Études Nucléaires de Saclay (CEA-Saclay), Gif-sur-Yvette, France and Grupo de Investigación de Física Nuclear y Astropartículas, Universidad de Zaragoza, Zaragoza, Spain
| | - I G Irastorza
- Grupo de Investigación de Física Nuclear y Astropartículas, Universidad de Zaragoza, Zaragoza, Spain
| | - J Jacoby
- Johann Wolfgang Goethe-Universität, Institut für Angewandte Physik, Frankfurt am Main, Germany
| | - K Jakovčić
- Rudjer Bošković Institute, Zagreb, Croatia
| | - M Karuza
- Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Trieste and Università di Trieste, Trieste, Italy
| | - K Königsmann
- Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
| | - R Kotthaus
- Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), München, Germany
| | - M Krčmar
- Rudjer Bošković Institute, Zagreb, Croatia
| | - M Kuster
- Max-Planck-Institut für Extraterrestrische Physik, Garching, Germany and Technische Universität Darmstadt, IKP, Darmstadt, Germany
| | - B Lakić
- Rudjer Bošković Institute, Zagreb, Croatia
| | - P M Lang
- Technische Universität Darmstadt, IKP, Darmstadt, Germany
| | - J M Laurent
- European Organization for Nuclear Research (CERN), Genève, Switzerland
| | - A Liolios
- Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - A Ljubičić
- Rudjer Bošković Institute, Zagreb, Croatia
| | - G Luzón
- Grupo de Investigación de Física Nuclear y Astropartículas, Universidad de Zaragoza, Zaragoza, Spain
| | - S Neff
- Technische Universität Darmstadt, IKP, Darmstadt, Germany
| | - T Niinikoski
- European Organization for Nuclear Research (CERN), Genève, Switzerland
| | - A Nordt
- Max-Planck-Institut für Extraterrestrische Physik, Garching, Germany and Technische Universität Darmstadt, IKP, Darmstadt, Germany
| | - T Papaevangelou
- IRFU, Centre d'Études Nucléaires de Saclay (CEA-Saclay), Gif-sur-Yvette, France
| | - M J Pivovaroff
- Lawrence Livermore National Laboratory, Livermore, California 94550, California, USA
| | - G Raffelt
- Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), München, Germany
| | - H Riege
- Technische Universität Darmstadt, IKP, Darmstadt, Germany
| | - A Rodríguez
- Grupo de Investigación de Física Nuclear y Astropartículas, Universidad de Zaragoza, Zaragoza, Spain
| | - M Rosu
- Technische Universität Darmstadt, IKP, Darmstadt, Germany
| | - J Ruz
- European Organization for Nuclear Research (CERN), Genève, Switzerland and Lawrence Livermore National Laboratory, Livermore, California 94550, California, USA
| | - I Savvidis
- Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - I Shilon
- European Organization for Nuclear Research (CERN), Genève, Switzerland and Grupo de Investigación de Física Nuclear y Astropartículas, Universidad de Zaragoza, Zaragoza, Spain
| | - P S Silva
- European Organization for Nuclear Research (CERN), Genève, Switzerland
| | - S K Solanki
- Max-Planck-Institut für Sonnensystemforschung, Göttingen, Germany
| | - L Stewart
- European Organization for Nuclear Research (CERN), Genève, Switzerland
| | - A Tomás
- Grupo de Investigación de Física Nuclear y Astropartículas, Universidad de Zaragoza, Zaragoza, Spain
| | - M Tsagri
- European Organization for Nuclear Research (CERN), Genève, Switzerland and Physics Department, University of Patras, Patras, Greece
| | - K van Bibber
- Lawrence Livermore National Laboratory, Livermore, California 94550, California, USA
| | - T Vafeiadis
- European Organization for Nuclear Research (CERN), Genève, Switzerland and Aristotle University of Thessaloniki, Thessaloniki, Greece and Physics Department, University of Patras, Patras, Greece
| | - J Villar
- Grupo de Investigación de Física Nuclear y Astropartículas, Universidad de Zaragoza, Zaragoza, Spain
| | - J K Vogel
- Albert-Ludwigs-Universität Freiburg, Freiburg, Germany and Lawrence Livermore National Laboratory, Livermore, California 94550, California, USA
| | | | - K Zioutas
- European Organization for Nuclear Research (CERN), Genève, Switzerland and Physics Department, University of Patras, Patras, Greece
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4
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Arik M, Aune S, Barth K, Belov A, Borghi S, Bräuninger H, Cantatore G, Carmona JM, Cetin SA, Collar JI, Dafni T, Davenport M, Eleftheriadis C, Elias N, Ezer C, Fanourakis G, Ferrer-Ribas E, Friedrich P, Galán J, García JA, Gardikiotis A, Gazis EN, Geralis T, Giomataris I, Gninenko S, Gómez H, Gruber E, Guthörl T, Hartmann R, Haug F, Hasinoff MD, Hoffmann DHH, Iguaz FJ, Irastorza IG, Jacoby J, Jakovčić K, Karuza M, Königsmann K, Kotthaus R, Krčmar M, Kuster M, Lakić B, Laurent JM, Liolios A, Ljubičić A, Lozza V, Lutz G, Luzón G, Morales J, Niinikoski T, Nordt A, Papaevangelou T, Pivovaroff MJ, Raffelt G, Rashba T, Riege H, Rodríguez A, Rosu M, Ruz J, Savvidis I, Silva PS, Solanki SK, Stewart L, Tomás A, Tsagri M, van Bibber K, Vafeiadis T, Villar JA, Vogel JK, Yildiz SC, Zioutas K. Search for sub-eV mass solar axions by the CERN Axion Solar Telescope with 3He buffer gas. Phys Rev Lett 2011; 107:261302. [PMID: 22243149 DOI: 10.1103/physrevlett.107.261302] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Indexed: 05/31/2023]
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.
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Affiliation(s)
- M Arik
- Dogus University, Istanbul, Turkey
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