Related papers: Calibration of the Cryogenic Measurement System of a Resonant Haloscope Cavity

Calibration of the Cryogenic Measurement System of a Resonant Haloscope Cavity

URL: http://arxiv.org/abs/2404.10264v1
Date: Tue, 16 Apr 2024 03:34:39 GMT
Title: Calibration of the Cryogenic Measurement System of a Resonant Haloscope Cavity
Authors: Dong He, Jie Fan, Xin Gao, Yu Gao, Nick Houston, Zhongqing Ji, Yirong Jin, Chuang Li, Jinmian Li, Tianjun Li, Shi-hang Liu, Jia-Shu Niu, Zhihui Peng, Liang Sun, Zheng Sun, Jia Wang, Puxian Wei, Lina Wu, Zhongchen Xiang, Qiaoli Yang, Chi Zhang, Wenxing Zhang, Xin Zhang, Dongning Zheng, Ruifeng Zheng, Jian-yong Zhou,
Abstract summary: We demonstrate a 7.138 GHz copper cavity with a loaded quality factor $Q_l=104$, operated at 22 mK temperature based on a dilution refrigerator. Our readout system consists of High Electron Mobility Transistors as cryogenic amplifiers at 4 K, plus room-temperature amplifiers and a spectrum analyzer for signal power detection.
Score: 15.693238765961619
License: http://creativecommons.org/licenses/by/4.0/
Abstract: Possible light bosonic dark matter interactions with the Standard Model photon have been searched by microwave resonant cavities. In this paper, we demonstrate the cryogenic readout system calibration of a 7.138 GHz copper cavity with a loaded quality factor $Q_l=10^4$, operated at 22 mK temperature based on a dilution refrigerator. Our readout system consists of High Electron Mobility Transistors as cryogenic amplifiers at 4 K, plus room-temperature amplifiers and a spectrum analyzer for signal power detection. We test the system with a superconducting two-level system as a single-photon source in the microwave frequency regime and report an overall 95.6 dB system gain and -71.4 dB attenuation in the cavity's input channel. The effective noise temperature of the measurement system is 7.5 K.

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