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

    arXiv.org, 02/2020
    Paper, Journal Article

    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.