95042 20250722154011.0 doi 10.1016/j.dark.2019.100367 sideral 113509 ART-2019-113509 eng Arguedas Cuendis, S. First results on the search for chameleons with the KWISP detector at CAST 2019 Access copy available to the general public Unrestricted 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 80pN at 95% confidence level. The detector is sensitive for direct coupling to matter 104 = ßm = 108, where the coupling to photons is locally bound to ß¿ = 1011. info:eu-repo/grantAgreement/EC/FP7/240054/EU/Novel Developments in Time Projection Chambers (TPCs) for Rare Event Searches in Underground Astroparticle EXperiments/TREX info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2011-24058 info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2013-41085-P info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 4.473 2019 ASTRONOMY & ASTROPHYSICS 17 / 68 = 0.25 2019 Q1 T1 1.459 2019 Astronomy and Astrophysics 2019 Q1 Space and Planetary Science 2019 Q2 info:eu-repo/semantics/article info:eu-repo/semantics/submittedVersion Baier, J. Barth, K. Baum, S. Bayirli, A. Belov, A. Bräuninger, H. Cantatore, G. Carmona, J.M. Universidad de Zaragoza (orcid)0000-0003-2264-2306 Castel, J.F. Universidad de Zaragoza (orcid)0000-0003-3532-7540 Cetin, S.A. Dafni, T. Universidad de Zaragoza (orcid)0000-0002-8921-910X Davenport, M. Dermenev, A. Desch, K. Döbrich, B. Fischer, H. Funk, W. García, J.A. (orcid)0000-0002-7399-7353 Gardikiotis, A. Garza, J.G. (orcid)0000-0003-0800-1588 Gninenko, S. Hasinoff, M.D. Hoffmann, D.H.H. Iguaz, F.J. (orcid)0000-0001-6327-9369 Irastorza, I.G. Universidad de Zaragoza (orcid)0000-0003-1163-1687 Jakovcic, K. Kaminski, J. Karuza, M. Krieger, C. Lakic, B. Laurent, J.M. Luzón, G. Universidad de Zaragoza (orcid)0000-0002-5352-1884 Maroudas, M. Miceli, L. Neff, S. Ortega, I. Ozbey, A. Pivovaroff, M.J. Rosu, M. Ruz, J. (orcid)0000-0002-3253-7027 Chóliz, 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. 2004 X Universidad de Zaragoza Dpto. Física Teórica Proy. investigación HCA 2004 390 Universidad de Zaragoza Dpto. Física Teórica Área Física Atóm.Molec.y Nucl. 26 (2019), 100367 [10 pp.] Phys. dark universe Physics of the Dark Universe 2212-6864 6334999 http://zaguan.unizar.es/record/95042/files/texto_completo.pdf Postprint 341703 http://zaguan.unizar.es/record/95042/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:95042 articulos driver 2025-07-22-15:35:40 ARTICLE