Avoided mode crossings in cylindrical microwave cavities

Abstract

Axion haloscope detectors require high-$Q$ cavities with tunable TM${}_{010}$ modes whose resonant electric field occupies as much of the full volume of the cavity as possible. An analytical study of the effects of longitudinal symmetry breaking within microwave cavities was conducted to better understand the mode structure. The study revealed longitudinal symmetry breaking of the cavities was the mechanism for avoided mode crossings (AMC) in cylindrical microwave cavities. The results showed the size of the gaps in the search frequency spectrum due to an AMC was roughly proportional to the magnitude of symmetry breaking for small perturbations.

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Cited by in corpus (6)

• Direct Search for Dark Matter Axions Excluding ALP Cogenesis in the 63-67 micro-eV Range, with The ORGAN Experiment
• Tunable photonic crystal haloscope for high-mass axion searches
• A Symmetric Multi-rod Tunable Microwave Cavity for the HAYSTAC Dark Matter Axion Search
• Tunable Rectangular Resonant Cavities for Axion Haloscopes
• Uniform Field in Microwave Cavities Through the Use of Effective Magnetic Walls
• On the use of dielectric elements in axion searches with microwave resonant cavities