Calibration of the Cryogenic Measurement System of a Resonant Haloscope Cavity
| Autor: | He, Dong, Fan, Jie, Gao, Xin, Gao, Yu, Houston, Nick, Ji, Zhongqing, Jin, Yirong, Li, Chuang, Li, Jinmian, Li, Tianjun, Liu, Shi-hang, Niu, Jia-Shu, Peng, Zhihui, Sun, Liang, Sun, Zheng, Wang, Jia, Wei, Puxian, Wu, Lina, Xiang, Zhongchen, Yang, Qiaoli, Zhang, Chi, Zhang, Wenxing, Zhang, Xin, Zheng, Dongning, Zheng, Ruifeng, Zhou, Jian-yong |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | 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. Comment: 7 pages, 5 figures, version to appear in CPC |
| Databáze: | arXiv |
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