Split-cavity tuning of a rectangular axion haloscope operating around 8.4 GHz

• DOI: 10.3389/fphy.2024.1372846
• Publication Date: 2024-05-07T04:32:14Z
• Authors: Jessica Golm; Jose María García...; Sergio Arguedas C...; Sergio Calatroni; Walter Wuensch; Babette Dobrich
• Keywords: Physics - Instrumentation and Detectors; Physics; QC1-999; FOS: Physical sciences; Instrumentation and Detectors (physics.ins-det); 01 natural sciences; dark matter; haloscope; High Energy Physics - Experiment; High Energy Physics - Experiment (hep-ex); tuning; cryogenics; axion; 0103 physical sciences

The axion haloscope is the currently most sensitive method to probe vanishingly small coupling of this prominent Dark Matter candidate photons. To scan a sizeable parameter space, cavities that make up need be tuned efficiently. In article, we describe novel technique tune haloscopes around 8.4 GHz in purely mechanical manner without use dielectrics. We achieve tuning by introducing gap along cavity geometry. A quality factor reduction less than 20% achieved experimentally for range 600 MHz at room temperature and cryogenic temperatures 300 MHz. larger would require an improved alignments mechanism. present results corresponding prototype outline prospects further develop technique.