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

Authors :
Jessica Golm
Jose María García-Barcelo
Sergio Arguedas Cuendis
Sergio Calatroni
Walter Wuensch
Babette Dobrich
Source :
Frontiers in Physics, Vol 12 (2024)
Publication Year :
2024
Publisher :
Frontiers Media S.A., 2024.

Abstract

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

Details

Language :
English
ISSN :
2296424X
Volume :
12
Database :
Directory of Open Access Journals
Journal :
Frontiers in Physics
Publication Type :
Academic Journal
Accession number :
edsdoj.535888a78efa45a9be481592ce9b1f99
Document Type :
article
Full Text :
https://doi.org/10.3389/fphy.2024.1372846