Speaker
Jessica Golm
(CERN)
Description
Many experiments all over the world search for Axions in different mass ranges. The Relic Axion Detector Experimental Setup (RADES) uses microwave filters as detectors which are in theory able to scan a mass range of 10 to 100 $\mu$eV. A typical RADES filter consists of N sub-cavities coupled by rectangular irises. They are installed at CAST in a bore of a powerful decommissioned LHC 9 T magnet. Currently, all RADES prototypes work at a fixed frequency. In order to scan through the mass ranges the cavities need to be tunable. Different approaches exist to generate tuning of the resonant frequency of a cavity.
This poster will focus on the mechanical tuning by changing the width of a 5 sub-cavities filter with inductive irises and a vertical cut up to 2.5 mm. Results of the tuning range of this method at warm, Q values and resonant frequencies of the vertical cut cavity between 7 K and 300 K in closed (f = 8.4 GHz) and open (1.25 mm; f = 8.1 GHz) position will be presented. Moreover, first ideas of a mechanical tuning mechanism at cryogenic temperatures and in a multi-tesla magnetic field will be shown.
Primary author
Jessica Golm
(CERN)
Co-authors
Mr
Jose María García Barceló
(Universidad Politécnica de Cartagena)
Sergio Arguedas Cuendis
(CERN)
