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ICCUB SEMINAR – QCD Axion Searches with Microwave Filters

ICCUB SEMINAR - QCD Axion Searches with Microwave Filters
Start
04-11-2018 12:00
End
04-11-2018
Speaker
Carlos Peña-Garay
Affiliation
Instituto de Física Corpuscular, Valencia
Host
ICCUB - IEEC
Place
Aula 507 (Pere Pascual)
Location
UB
ABSTRACT

We have proposed, designed and constructed 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. 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. I will describe the theoretical framework of the detection concept and 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. I will show the electromagnetic properties of the filter characterized at 2 K and 298 K, which is now placed in ultra-high vacuum in one of the twin-bores of the 9 T CAST dipole magnet at CERN, and the sensitivity to relic axions in the current data taking phase.
Contact email
jmiralda(a)fqa.ub.edu