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arXiv · 2404.10264

Calibration of the Cryogenic Measurement System of a Resonant Haloscope Cavity

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
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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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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. 2024-04-16. Calibration of the Cryogenic Measurement System of a Resonant Haloscope Cavity. https://arxiv.org/abs/2404.10264

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