{"paper":{"title":"New solar axion search in CAST with $^4$He filling","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"hep-ex","authors_text":"A. Belov, A. Dermenev, A. Gardikiotis, A. Liolios, A. Ljubi\\v{c}i\\'c, A. Nordt, A. Tom\\'as, B. Laki\\'c, C. Eleftheriadis, D. H. H. Hoffmann, E. Da Riva, E. Ferrer-Ribas, E. Georgiopoulou, E. N. Gazis, F. J. Iguaz, G. Cantatore, G. Fanourakis, G. Luz\\'on, G. Raffelt A. Rodr\\'iguez, H. Br\\\"auninger, I. Giomataris, I. G. Irastorza, I. Ortega, I. Savvidis, I. Shilon, J. A. Garc\\'ia, J. Bremer, J. Gal\\'an, J. G. Garza, J. I. Collar, J. Jacoby, J. K. Vogel, J. M. Carmona, J. M. Laurent, J. Ruz, J. Villar, K. Barth, K. Jakov\\v{c}i\\'c, K. Zioutas (CAST Collaboration), L. Stewart, M. Arik, M. Davenport, M. D. Hasinoff, M. G\\'omez Marzoa, M. J. Pivovaroff, M. Karuza, M. Kavuk, M. Kr\\v{c}mar, M. Kuster, M. Rosu, N. Elias, S. A. Cetin, S. Aune, S. C. Yildiz, S. Gninenko, S. K. Solanki, S. Neff, T. Dafni, T. Geralis, T. Niinikoski, T. Papaevangelou, T. Vafeiadis, V. Burwitz","submitted_at":"2015-03-02T16:51:28Z","abstract_excerpt":"The CERN Axion Solar Telescope (CAST) searches for $a\\to\\gamma$ conversion in the 9 T magnetic field of a refurbished LHC test magnet that can be directed toward the Sun. Two parallel magnet bores can be filled with helium of adjustable pressure to match the X-ray refractive mass $m_\\gamma$ to the axion search mass $m_a$. After the vacuum phase (2003--2004), which is optimal for $m_a\\lesssim0.02$ eV, we used $^4$He in 2005--2007 to cover the mass range of 0.02--0.39 eV and $^3$He in 2009--2011 to scan from 0.39--1.17 eV. After improving the detectors and shielding, we returned to $^4$He in 201"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1503.00610","kind":"arxiv","version":2},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}