1. CDEX-1 1 kg point-contact germanium detector for low mass dark matter searches
- Author
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Ke-Jun Kang, Qian Yue, Yu-Cheng Wu, Jian-Ping Cheng, Yuan-Jing Li, Yang Bai, Yong Bi, Jian-Ping Chang, Nan Chen, Ning Chen, Qing-Hao Chen, Yun-Hua Chen, Yo-Chun Chuang, Zhi Deng, Qiang Du, Hui Gong, Xi-Qing Hao, Qing-Ju He, Xin-Hui Hu, Han-Xiong Huang, Teng-Rui Huang, Hao Jiang, Hau-Bin Li, Jian-Min Li, Jin Li, Jun Li, Xia Li, Xin-Ying Li, Xue-Qian Li, Yu-Lan Li, Heng-Yi Liao, Fong-Kay Lin, Shin-Ted Lin, Shu-Kui Liu, Lan-Chun Lü, Hao Ma, Shao-Ji Mao, Jian-Qiang Qin, Jie Ren, Jing Ren, Xi-Chao Ruan, Man-Bin Shen, Lakhwinder Singh, Manoj Kumar Singh, Arun Kumar Soma, Jian Su, Chang-Jian Tang, Chao-Hsiung Tseng, Ji-Min Wang, Li Wang, Qing Wang, Tsz-King Henry Wong, Shi-Yong Wu, Wei Wu, Hao-Yang Xing, Yin Xu, Tao Xue, Li-Tao Yang, Song-Wei Yang, Nan Yi, Chun-Xu Yu, Hao Yu, Xun-Zhen Yu, Xiong-Hui Zeng, Zhi Zeng, Lan Zhang, Yun-Hua Zhang, Ming-Gang Zhao, Wei Zhao, Su-Ning Zhong, Zu-Ying Zhou, Jing-Jun Zhu, Wei-Bin Zhu, Xue-Zhou Zhu, and Zhong-Hua Zhu
- Subjects
Nuclear and High Energy Physics ,Physics - Instrumentation and Detectors ,Physics::Instrumentation and Detectors ,Dark matter ,FOS: Physical sciences ,chemistry.chemical_element ,Germanium ,Atomic ,High Energy Physics - Experiment ,Nuclear physics ,High Energy Physics - Experiment (hep-ex) ,Particle and Plasma Physics ,Affordable and Clean Energy ,Nuclear ,Instrumentation and Methods for Astrophysics (astro-ph.IM) ,Instrumentation ,Light dark matter ,physics.ins-det ,Physics ,Range (particle radiation) ,hep-ex ,Detector ,Molecular ,Astronomy and Astrophysics ,Instrumentation and Detectors (physics.ins-det) ,Dead time ,Nuclear & Particles Physics ,Semiconductor detector ,chemistry ,Electromagnetic shielding ,Astrophysics - Instrumentation and Methods for Astrophysics ,astro-ph.IM - Abstract
The CDEX Collaboration has been established for direct detection of light dark matter particles, using ultra-low energy threshold p-type point-contact germanium detectors, in China JinPing underground Laboratory (CJPL). The first 1 kg point-contact germanium detector with a sub-keV energy threshold has been tested in a passive shielding system located in CJPL. The outputs from both the point-contact p+ electrode and the outside n+ electrode make it possible to scan the lower energy range of less than 1 keV and at the same time to detect the higher energy range up to 3 MeV. The outputs from both p+ and n+ electrode may also provide a more powerful method for signal discrimination for dark matter experiment. Some key parameters, including energy resolution, dead time, decay times of internal X-rays, and system stability, have been tested and measured. The results show that the 1 kg point-contact germanium detector, together with its shielding system and electronics, can run smoothly with good performances. This detector system will be deployed for dark matter search experiments., 6 pages, 8 figures
- Published
- 2013
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