High quality factor photonic cavity for dark matter axion searches

D. Alesini; C. Braggio; G. Carugno; N. Crescini; D. D'Agostino; D. Di Gioacchino; R. Di Vora; P. Falferi; U. Gambardella; C. Gatti; G. Iannone; C. Ligi; A. Lombardi; G. Maccarrone; A. Ortolan; R. Pengo; C. Pira; A. Rettaroli; G. Ruoso; L. Taffarello; S. Tocci

doi:10.1063/5.0003878

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arXiv · 2002.01816

High quality factor photonic cavity for dark matter axion searches

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Abstract

Searches for dark matter axion involve the use of microwave resonant cavities operating in a strong magnetic field. Detector sensitivity is directly related to the cavity quality factor, which is limited, however, by the presence of the external magnetic field. In this paper we present a cavity of novel design whose quality factor is not affected by a magnetic field. It is based on a photonic structure by the use of sapphire rods. The quality factor at cryogenic temperature is in excess of $5 \times 10^5$ for a selected mode.

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D. Alesini, C. Braggio, G. Carugno, N. Crescini, D. D'Agostino, D. Di Gioacchino, R. Di Vora, P. Falferi, U. Gambardella, C. Gatti, G. Iannone, C. Ligi, A. Lombardi, G. Maccarrone, A. Ortolan, R. Pengo, C. Pira, A. Rettaroli, G. Ruoso, L. Taffarello, S. Tocci. 2020-02-05. High quality factor photonic cavity for dark matter axion searches. https://doi.org/10.1063/5.0003878

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