000079019 001__ 79019 000079019 005__ 20250722154010.0 000079019 0247_ $$2doi$$a10.1088/1475-7516/2018/05/040 000079019 0248_ $$2sideral$$a107207 000079019 037__ $$aART-2018-107207 000079019 041__ $$aeng 000079019 100__ $$aMelcón, A.Á. 000079019 245__ $$aAxion searches with microwave filters: The RADES project 000079019 260__ $$c2018 000079019 5060_ $$aAccess copy available to the general public$$fUnrestricted 000079019 5203_ $$aWe propose, design and construct a variant of the conventional axion haloscope concept that could be competitive in the search for dark matter axions of masses in the decade 10-100 µeV. Theses masses are located somewhat above the mass range in which existing experiments have reached sensitivity to benchmark QCD axion models. Our haloscope consists of an array of small microwave cavities connected by rectangular irises, in an arrangement commonly used in radio-frequency filters. The size of the unit cavity determines the main resonant frequency, while the possibility to connect a large number of cavities allows to reach large detection volumes. We develop the theoretical framework of the detection concept, and present design prescriptions to optimize detection capabilities. We describe the design and realization of a first small-scale prototype of this concept, called Relic Axion Detector Exploratory Setup (RADES). It consists of a copper-coated stainless steel five-cavities microwave filter with the detecting mode operating at around 8.4 GHz. This structure has been electromagnetically characterized at 2 K and 298 K, and it is now placed in ultra-high vacuum in one of the twin-bores of the 9 T CAST dipole magnet at CERN. We describe the data acquisition system developed for relic axion detection, and present preliminary results of the electromagnetic properties of the microwave filter, which show the potential of filters to reach QCD axion window sensitivity at X-band frequencies. 000079019 536__ $$9info:eu-repo/grantAgreement/ES/MINECO/FPA2015-65745-P$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 690575-InvisiblesPlus$$9info:eu-repo/grantAgreement/EC/H2020/690575/EU/InvisiblesPlus/InvisiblesPlus$$9This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 674896-ELUSIVES$$9info:eu-repo/grantAgreement/EC/H2020/674896/EU/The Elusives Enterprise: Asymmetries of the Invisible Universe/ELUSIVES$$9info:eu-repo/grantAgreement/EC/FP7/240054/EU/Novel Developments in Time Projection Chambers (TPCs) for Rare Event Searches in Underground Astroparticle EXperiments/TREX$$9info:eu-repo/grantAgreement/ES/FEDER-AEI/FPA-2016-76978 000079019 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/ 000079019 590__ $$a5.524$$b2018 000079019 591__ $$aPHYSICS, PARTICLES & FIELDS$$b5 / 29 = 0.172$$c2018$$dQ1$$eT1 000079019 591__ $$aASTRONOMY & ASTROPHYSICS$$b13 / 69 = 0.188$$c2018$$dQ1$$eT1 000079019 592__ $$a0.913$$b2018 000079019 593__ $$aAstronomy and Astrophysics$$c2018$$dQ2 000079019 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion 000079019 700__ $$aCuendis, S.A. 000079019 700__ $$aCogollos, C. 000079019 700__ $$aDíaz-Morcillo, A. 000079019 700__ $$aDöbrich, B. 000079019 700__ $$aGallego, J.D. 000079019 700__ $$aGimeno, B. 000079019 700__ $$0(orcid)0000-0003-1163-1687$$aIrastorza, I.G.$$uUniversidad de Zaragoza 000079019 700__ $$aLozano-Guerrero, A.J. 000079019 700__ $$aMalbrunot, C. 000079019 700__ $$aNavarro, P. 000079019 700__ $$aGaray, C.P. 000079019 700__ $$0(orcid)0000-0002-1044-8197$$aRedondo, J.$$uUniversidad de Zaragoza 000079019 700__ $$aVafeiadis, T. 000079019 700__ $$aWuensch, W. 000079019 7102_ $$12004$$2405$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Teórica 000079019 7102_ $$12004$$2390$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Atóm.Molec.y Nucl. 000079019 773__ $$g2018, 5 (2018), [22 pp]$$pJ. Cosmol. Astropart. Phys.$$tJournal of Cosmology and Astroparticle Physics$$x1475-7516 000079019 8564_ $$s806786$$uhttps://zaguan.unizar.es/record/79019/files/texto_completo.pdf$$yPostprint 000079019 8564_ $$s95984$$uhttps://zaguan.unizar.es/record/79019/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint 000079019 909CO $$ooai:zaguan.unizar.es:79019$$particulos$$pdriver 000079019 951__ $$a2025-07-22-15:35:39 000079019 980__ $$aARTICLE