1. CDEX-1 1 kg point-contact germanium detector for low mass dark matter searches
- Author
-
Kang, Ke-Jun, Yue, Qian, Wu, Yu-Cheng, Cheng, Jian-Ping, Li, Yuan-Jing, Bai, Yang, Bi, Yong, Chang, Jian-Ping, Chen, Nan, Chen, Ning, Chen, Qing-Hao, Chen, Yun-Hua, Chuang, Yo-Chun, Deng, Zhi, Du, Qiang, Gong, Hui, Hao, Xi-Qing, He, Qing-Ju, Hu, Xin-Hui, Huang, Han-Xiong, Huang, Teng-Rui, Jiang, Hao, Li, Hau-Bin, Li, Jian-Min, Li, Jin, Li, Jun, Li, Xia, Li, Xin-Ying, Li, Xue-Qian, Li, Yu-Lan, Liao, Heng-Yi, Lin, Fong-Kay, Lin, Shin-Ted, Liu, Shu-Kui, Lü, Lan-Chun, Ma, Hao, Mao, Shao-Ji, Qin, Jian-Qiang, Ren, Jie, Ren, Jing, Ruan, Xi-Chao, Shen, Man-Bin, Singh, Lakhwinder, Singh, Manoj Kumar, Soma, Arun Kumar, Su, Jian, Tang, Chang-Jian, Tseng, Chao-Hsiung, Wang, Ji-Min, Wang, Li, Wang, Qing, Wong, Tsz-King Henry, Wu, Shi-Yong, Wu, Wei, Xing, Hao-Yang, Xu, Yin, Xue, Tao, Yang, Li-Tao, Yang, Song-Wei, Yi, Nan, Yu, Chun-Xu, Yu, Hao, Yu, Xun-Zhen, Zeng, Xiong-Hui, Zeng, Zhi, Zhang, Lan, Zhang, Yun-Hua, Zhao, Ming-Gang, Zhao, Wei, Zhong, Su-Ning, Zhou, Zu-Ying, Zhu, Jing-Jun, Zhu, Wei-Bin, Zhu, Xue-Zhou, and Zhu, Zhong-Hua
- Subjects
Affordable and Clean Energy ,physics.ins-det ,astro-ph.IM ,hep-ex ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Nuclear & Particles Physics - Abstract
The CDEX Collaboration has been established for direct detection of lightdark matter particles, using ultra-low energy threshold p-type point-contactgermanium detectors, in China JinPing underground Laboratory (CJPL). The first1 kg point-contact germanium detector with a sub-keV energy threshold has beentested in a passive shielding system located in CJPL. The outputs from both thepoint-contact p+ electrode and the outside n+ electrode make it possible toscan the lower energy range of less than 1 keV and at the same time to detectthe higher energy range up to 3 MeV. The outputs from both p+ and n+ electrodemay also provide a more powerful method for signal discrimination for darkmatter experiment. Some key parameters, including energy resolution, dead time,decay times of internal X-rays, and system stability, have been tested andmeasured. The results show that the 1 kg point-contact germanium detector,together with its shielding system and electronics, can run smoothly with goodperformances. This detector system will be deployed for dark matter searchexperiments.
- Published
- 2013