Low Frequency (100-600 MHz) Searches with Axion Cavity Haloscopes

Abstract

We investigate reentrant and dielectric loaded cavities for the purpose of extending the range of axion cavity haloscopes to lower masses, below the range where the Axion Dark Matter eXperiment (ADMX) has already searched. Reentrant and dielectric loaded cavities were simulated numerically to calculate and optimize their form factors and quality factors. A prototype reentrant cavity was built and its measured properties were compared with the simulations. We estimate the sensitivity of axion dark matter searches using reentrant and dielectric loaded cavities inserted in the existing ADMX magnet at the University of Washington and a large magnet being installed at Fermilab.

33 pages, 24 figures

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Cited by in corpus (4)

• Cavity Detection of Gravitational Waves: Where Do We Stand?
• High-$Q$ Superconducting Lumped-Element Resonators for Low-Mass Axion Searches
• A Prototype Hybrid Mode Cavity for Heterodyne Axion Detection
• Noise limits for dc SQUID readout of high-$Q$ resonators below 300 MHz