The 3 Cavity Prototypes of RADES: An Axion Detector Using Microwave Filters at CAST

The Relic Axion Detector Experimental Setup (RADES) is an axion search project that uses a microwave filter as resonator for Dark Matter conversion. The main focus of this publication is the description of the three different cavity prototypes of RADES. The result of the first tests of one of the prototypes is also presented. The filters consist of 5 or 6 stainless steel sub-cavities joined by rectangular irises. The size of the sub-cavities determines the working frequency, the amount of sub-cavities determine the working volume. The first cavity prototype was built in 2017 to work at a frequency of ∼8.4 GHz and it was placed at the 9 T CAST dipole magnet at CERN. Two more prototypes were designed and built in 2018. The aim of the new designs is to find and test the best cavity geometry in order to scale up in volume and to introduce an effective tuning mechanism. Our results demonstrate the promising potential of this type of filter to reach QCD axion sensitivity at X-Band frequencies.

Note:

Proceedings for the 3rd Axion Cavity and Detector Workshop, Livermore Valley Open Campus August 21-25th, 2018

Dark matter experiments
axions
microwave filters
Axions
Microwave filters
axion: detector
quantum chromodynamics: axion
cavity: design
CERN Lab
iron

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