A Symmetric Multi-rod Tunable Microwave Cavity for the HAYSTAC Dark Matter Axion Search
arXiv:2006.01248 · doi:10.1063/5.0016125
Abstract
The microwave cavity experiment is the most sensitive way of looking for axions in the 0.1-10 GHz range, corresponding to masses of 0.5 - 40 eV. The particular challenge for frequencies greater than 5 GHz is designing a cavity with a large volume that contains a resonant mode that has a high form factor, a high quality factor, a wide dynamic range, and is free from intruder modes. For HAYSTAC, we have designed and constructed an optimized high frequency cavity with a tuning mechanism that preserves a high degree of rotational symmetry, critical to maximizing its figure of merit. This cavity covers an important frequency range according to recent theoretical estimates for the axion mass, 5.5 - 7.4 GHz, and the design appears extendable to higher frequencies as well. This paper will discuss key design and construction details of the cavity, present a summary of the design evolution, and alert practitioners of potentially unfruitful avenues for future work.
arXiv comment26 pages, 11 figures
References in corpus (16)
- Experimental Searches for the Axion and Axion-like Particles
- Extended Search for the Invisible Axion with the Axion Dark Matter Experiment
- The Local Dark Matter Density
- A quantum-enhanced search for dark matter axions
- First results from a microwave cavity axion search at 24 micro-eV
- Results from phase 1 of the HAYSTAC microwave cavity axion experiment
- Early-Universe Simulations of the Cosmological Axion
- Axion Dark Matter Search around 6.7 eV
- Results from a High-Sensitivity Search for Cosmic Axions
- The dark-matter axion mass
- The HAYSTAC Axion Search Analysis Procedure
- Analysis of single-photon and linear amplifier detectors for microwave cavity dark matter axion searches
- Design and Operational Experience of a Microwave Cavity Axion Detector for the 20-100 micro-eV Range
- Squeezed vacuum used to accelerate the search for a weak classical signal
- Characterization of the HAYSTAC axion dark matter search cavity using microwave measurement and simulation techniques
- Avoided mode crossings in cylindrical microwave cavities