Phase-matching of multiple-cavity detectors for dark matter axion search
Junu Jeong, SungWoo Youn, Saebyeok Ahn, Chanshin Kang, and Yannis K., Semertzids
TL;DR
This paper investigates phase-matching techniques for multiple-cavity systems in axion dark matter searches, aiming to enhance sensitivity by coherently combining signals from smaller, high-frequency cavities.
Contribution
It presents a detailed design and experimental validation of a phase-matching mechanism for multiple-cavity detectors, improving the efficiency of axion search experiments.
Findings
Successful experimental demonstration with a double-cavity system
Enhanced phase coherence in multi-cavity configurations
Feasibility of scalable multi-cavity axion detectors
Abstract
Conventional axion dark matter search experiments employ cylindrical microwave cavities immersed in a solenoidal magnetic field. Exploring higher frequency regions requires smaller size cavities as the TM010 resonant frequencies scale inversely with cavity radius. One intuitive way to make efficient use of a given magnet volume, and thereby to increase the experimental sensitivity, is to bundle multiple cavities together and combine their individual outputs ensuring phase-matching of the coherent axion signal. We perform an extensive study for realistic design of a phase-matching mechanism for multiple-cavity systems and demonstrate its experimental feasibility using a double-cavity system.
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