On the use of dielectric elements in axion searches with microwave resonant cavities

Abstract

This study explores the primary effects of dielectric materials in a resonant cavity-based search for axion dark matter. While dielectrics prove beneficial in numerous cases, their incorporation may lead to less-than-optimal performance, especially for the lowest TM mode. Additionally, the stronger confinement of the electric field inside the dielectrics can exacerbate mode mixings, in particular for higher-order modes. Case studies have been carried out using a combination of analytical solutions and numerical simulations. The findings indicate dielectric cavities employing the ${\text{TM}}_{010}$ mode experience a significant reduction in sensitivity when compared to a similar search conducted in a cavity at equivalent frequency using no dielectrics.

10 pages, 7 figures

References in corpus (5)

• First Results from Axion Haloscope at CAPP around 10.7 $\mu$eV
• Realization of a high quality factor resonator with hollow dielectric cylinders for axion searches
• Exploiting higher-order resonant modes for axion haloscopes
• High quality factor photonic cavity for dark matter axion searches
• Impedance Matching to Axion Dark Matter: Considerations of the Photon-Electron Interaction

Cited by in corpus (2)

• Rydberg-atom-based single-photon detection for haloscope axion searches
• A Prototype Hybrid Mode Cavity for Heterodyne Axion Detection