Introduction to the CDEX experiment

Kang, K.; Cheng, Jianping; Li, Jin; Li, Yuanjing; Yue, Qian; Bai, Y.; Yong, Bi; Chen, Nan; Chen, Ning; Chen, Qinghao; Chen, Yunhua; Chuang, Y. C.; Deng, Zhi; Du, Qikui; Gong, H.; Hao, X. Q.; He, H.; He, Qingming; Hu, Xin-Hui; Huang, Hanxiong; Huang, T. R.; Jiang, Hao; Li, Hau-Bin; Li, Jianmin; Li, Jun; Xia, Li; Li, Xinying; Li, Xue–Qian; Li, Yulan; Liao, H.; Lin, F. K.; Lin, Shou-De; Liu, Shukui; Liu, Ya-Bin; Lu, L.; Ma, Hui; Mao, S. J.; Qin, J. Q.; Ren, Jie; Ren, Jing; Ruan, Xichao; Shen, Manbin; Simgh, Lakhwinder; Singh, M. K.; Soma, A. K.; Su, Jian; Tang, C. J.; Tseng, C. H.; Wang, Jimin; Wang, Li; Wang, Qing; Wong, TszKing Henry; Wang, Xufeng; Wu, Shengji; Wu, W.; Wu, Yucheng; Xianyu, Zhong-Zhi; Xing, Haoyang; Xu, Xun-Jie; Yin, Xuefeng; Xue, T.; Yang, L. T.; Yang, S. W.; Nan, Yi; Yu, C. X.; Yu, Hao; Yu, Xunzhen; Zeng, X. H.; Zeng, Zhi; Zhang, Lan; Zhang, Yunhua; Zhao, M. G.; Zhao, Wei; Su-Ning, Zhong; Zhou, J. F.; Zhou, Z. Y.; Zhu, J. J.; Zhu, Wei; Zhu, Xiaobiao; Zhu, Zhonghua

doi:10.1007/s11467-013-0349-1

Cited by 96 publications

(56 citation statements)

References 74 publications

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“…At the China Jinping Underground Laboratory, in Sichuan, the China Dark Matter Experiment (CDEX [155]) has undertaken several increasingly large target mass runs. Protected by a rock overburden of 2400m, the germanium detectors of CDEX-1 are enclosed in NaI(Tl) cylinders [107] enabling competitive background suppression to very low energy thresholds (0.32 keV ee ) for the Phase 1 run, the threshold reached was halved in the upgrade to CDEX-10 [109] and will ultimately be 100 eV ee for CDEX-1T [155].…”

Section: Cdexmentioning

confidence: 99%

Annual modulation in direct dark matter searches

Froborg

Duffy

2020

J. Phys. G: Nucl. Part. Phys.

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The measurement of an annual modulation in the event rate of direct dark matter detection experiments is a powerful tool for dark matter discovery. Indeed, several experiments have already claimed such a discovery in the past decade. While most of them have later revoked their conclusions, and others have found potentially contradictory results, one still stands today. This paper explains the potential as well as the challenges of annual modulation measurements, and gives an overview on past, present and future direct detection experiments.

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Section: Cdexmentioning

confidence: 99%

Annual modulation in direct dark matter searches

Froborg

Duffy

2020

J. Phys. G: Nucl. Part. Phys.

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“…It is situated in the Laboratoire Souterrain de Modane (LSM) [76,258]. The very first phase of the experiment started in the mid-1990s [96], developed into the EDELWEISS-I [143,144,280] and EDELWEISS-II [76,77] stages. It is now in the installation phase of EDELWEISS-III [74,258].…”

Section: Dark Matter Search At Lsm With Edelweissmentioning

confidence: 99%

“…A second China based experiment using gadolinium loaded liquid scintillator seems to be planned at the China JinPing Underground Laboratory (CJPL) at 6720 mwe [144,258,260,261], the location of the China Darkmatter EXperiment (CDEX) [143].…”

Section: Currently Running and Future Experimentsmentioning

confidence: 99%

Production Yield of Muon-Induced Neutrons in Lead

Kluck

2015

Springer Theses

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The series "Springer Theses" brings together a selection of the very best Ph.D. theses from around the world and across the physical sciences. Nominated and endorsed by two recognized specialists, each published volume has been selected for its scientific excellence and the high impact of its contents for the pertinent field of research. For greater accessibility to non-specialists, the published versions include an extended introduction, as well as a foreword by the student's supervisor explaining the special relevance of the work for the field. As a whole, the series will provide a valuable resource both for newcomers to the research fields described, and for other scientists seeking detailed background information on special questions. Finally, it provides an accredited documentation of the valuable contributions made by today's younger generation of scientists.Theses are accepted into the series by invited nomination only and must fulfill all of the following criteria • They must be written in good English.• The topic should fall within the confines of Chemistry, Physics, Earth Sciences, Engineering and related interdisciplinary fields such as Materials, Nanoscience, Chemical Engineering, Complex Systems and Biophysics.

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“…The CDEX [1] (China Dark matter EXperiment) in CJPL (China Jinping Underground Laboratory) [2] is located in Xichang, Sichuan province, China. CDEX-1 deploys one kg-scale mass pPCGe (p-type Point Contact Germanium) detector enclosed by a NaI(Tl) crystal scintillator as anti-Compton detector [3].…”

Section: Introductionmentioning

confidence: 99%

Prototype of pulse digitizer and readout electronics for CDEX-10 in CJPL

Zhu¹,

Li²,

Xue³

et al. 2020

J. Inst.

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The CDEX (China Dark matter Experiment) is currently in the stage to upgrade to approximately 10 kg HPGe (High Purity Germanium) detectors (CDEX-10) in CJPL (China Jinping Underground Laboratory) and aims to detect the WIMP (Weakly Interacting Massive Particles). Six analog signals and one inhibited signal are outputted from preamplifier by one HPGe detector (~1 kg) of CDEX-10. The analog signals are conditioned with two 6-µs and one 12-µs shaping amplifiers, and three timing amplifiers respectively. The inhibited signal is used for trigger. The analog signals from shaping and timing amplifiers are digitized to obtain energy spectrum and rise-time distribution. The rise-time distribution is used to discriminate surface, bulk, and very bulk events, which can help to supress the background level in dark matter detection. Composed of commercial modules, the previous DAQ (Data Acquisition Systems) is insufficient in discriminating between bulk and very bulk events due to the limited sampling rate (100 MSPS). Besides, as number of channel increases, the system will be simplified by integrating the trigger logic in FPGA (Field Programmable Gate Array). In this paper, a prototype named RAIN4HPGe is designed with pulse digitizer and readout electronics, integrating 14-Bit 100 MSPS ADCs (Analog-to-Digital Converters), 12-Bit 1 GSPS ADCs, FPGA etc.. The RAIN1000Z1 readout module based on ZYNQ SoC (System on Chip) is used for readout over Gigabit Ethernet. Better energy resolution, e.g. improving from 558 eV to 474 eV @122 keV, can be achieved by RAIN4HPGe compared to previous DAQ (Data Acquisition Systems) with commercial solution. Moreover, the discrimination performance of bulk, and very bulk events has been improved by RAIN4HPGe with 1 GSPS ADC.

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Introduction to the CDEX experiment

Cited by 96 publications

References 74 publications

Annual modulation in direct dark matter searches

Annual modulation in direct dark matter searches

Production Yield of Muon-Induced Neutrons in Lead

Prototype of pulse digitizer and readout electronics for CDEX-10 in CJPL

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