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arXiv 1303.0601physics.ins-detastro-ph.IMhep-exhep-ph
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CDEX实验简介

Introduction of the CDEX experiment

Ke-Jun Kang, Jian-Ping Cheng, Jin Li, Yuan-Jing Li, Qian Yue, Yang Bai, Yong Bi, Jian-Ping Chang, Nan Chen, Ning Chen, Qing-Hao Chen, Yun-Hua Chen, Zhi Deng, Qi… 展开作者

Ke-Jun Kang, Jian-Ping Cheng, Jin Li, Yuan-Jing Li, Qian Yue, Yang Bai, Yong Bi, Jian-Ping Chang, Nan Chen, Ning Chen, Qing-Hao Chen, Yun-Hua Chen, Zhi Deng, Qiang Du, Hui Gong, Xi-Qing Hao, Hong-Jian He, Qing-Ju He, Xin-Hui Hu, Han-Xiong Huang, Hao Jiang, Jian-Min Li, Xia Li, Xin-Ying Li, Xue-Qian Li, Yu-Lan Li, Shu-Kui Liu, Ya-Bin Liu, Lan-Chun Lu, Hao Ma, Jian-Qiang Qin, Jie Ren, Jing Ren, Xi-Chao Ruan, Man-Bin Shen, Jian Su, Chang-Jian Tang, Zhen-Yu Tang, Ji-Min Wang, Qing Wang, Xu-Feng Wang, Shi-Yong Wu, Yu-Cheng Wu, Zhong-Zhi Xianyu, Hao-Yang Xing, Xun-Jie Xu, Yin Xu, Tao Xue, Li-Tao Yang, Nan Yi, Hao Yu, Chun-Xu Yu, Xiong-Hui Zeng, Zhi Zeng, Lan Zhang, Guang-Hua Zhang, Ming-Gang Zhao, Su-Ning Zhong, Jin Zhou, Zu-Ying Zhou, Jing-Jun Zhu, Wei-Bin Zhu, Xue-Zhou Zhu, Zhong-Hua Zhu

摘要:

弱相互作用大质量粒子(WIMPs)是宇宙中暗物质的候选者。到目前为止,还没有观察到WIMP与原子核的直接相互作用。实验得到的WIMP核子自旋无关截面的排斥极限在高质量区约为10^{-7}pb,在低质量区仅为10^{-5}pb。中国金平地下实验室CJPL是世界上最深的地下实验室,为直接观测暗物质提供了非常有前途的环境。中国暗物质实验(CDEX)将直接探测低质量区的WIMP通量。CJPL和CDEX在近两年都取得了显著的进展。CDEX采用点接触锗半导体检测器PCGe,其检测阈值小于300 eV。本文报道了在CJPL上进行的μ子通量测量、放射性监测和氡浓度监测的结果,以及1 kg PCGe探测器CDEX-1和10 kg探测器阵列CDEX-10的结构和性能,包括探测器、电子学、屏蔽和冷却系统。最后,我们讨论了CDEX-1,CDEX-10和未来的CDEX-1 T探测器的物理目标。

英文摘要:

Weakly Interacting Massive Particles (WIMPs) are the candidates of dark matter in our universe. Up to now any direct interaction of WIMP with nuclei has not been observed yet. The exclusion limits of the spin-independent cross section of WIMP-nucleon which have been experimentally obtained is about 10^{-7}pb at high mass region and only 10^{-5}pb} at low mass region. China Jin-Ping underground laboratory CJPL is the deepest underground lab in the world and provides a very promising environment for direct observation of dark matter. The China Dark Matter Experiment (CDEX) experiment is going to directly detect the WIMP flux with high sensitivity in the low mass region. Both CJPL and CDEX have achieved a remarkable progress in recent two years. The CDEX employs a point-contact germanium semi-conductor detector PCGe whose detection threshold is less than 300 eV. We report the measurement results of Muon flux, monitoring of radioactivity and Radon concentration carried out in CJPL, as well describe the structure and performance of the 1 kg PCGe detector CDEX-1 and 10kg detector array CDEX-10 including the detectors, electronics, shielding and cooling systems. Finally we discuss the physics goals of the CDEX-1, CDEX-10 and the future CDEX-1T detectors.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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