Performances of a prototype point-contact germanium detector immersed in liquid nitrogen for light dark matter search
Abstract
The CDEX-10 experiment searches for light weakly-interacting massive particles, a form of dark matter, at the China JinPing underground laboratory, where approximately 10 kg of germanium detectors are arranged in an array and immersed in liquid nitrogen. Herein, we report on the experimental apparatus, detector characterization, and spectrum analysis of one prototype detector. Owing to the higher rise-time resolution of the CDEX-10 prototype detector as compared with CDEX-1B, we identified the origin of an observed category of extremely fast events. For data analysis of the CDEX-10 prototype, we introduced and applied an improved bulk/surface event discrimination method. The results of the new method were compared to those of the CDEX-1B spectrum. Both sets of results showed good consistency in the 0--12 keVee energy range, except for the 8.0 keV K-shell X-ray peak from the external copper.
Keywords
Cite
@article{arxiv.1810.08808,
title = {Performances of a prototype point-contact germanium detector immersed in liquid nitrogen for light dark matter search},
author = {H. Jiang and L. T. Yang and Q. Yue and K. J. Kang and J. P. Cheng and Y. J. Li and H. T. Wong and M. Agartioglu and H. P. An and J. P. Chang and J. H. Chen and Y. H. Chen and Z. Deng and Q. Du and H. Gong and L. He and J. W. Hu and Q. D. Hu and H. X. Huang and L. P. Jia and H. B. Li and H. Li and J. M. Li and J. Li and X. Li and X. Q. Li and Y. L. Li and B. Liao and F. K. Lin and S. T. Lin and S. K. Liu and Y. D. Liu and Y. Y. Liu and Z. Z. Liu and H. Ma and J. L. Ma and H. Pan and J. Ren and X. C. Ruan and B. Sevda and V. Sharma and M. B. Shen and L. Singh and M. K. Singh and T. X. Sun and C. J. Tang and W. Y. Tang and Y. Tian and G. F. Wang and J. M. Wang and L. Wang and Q. Wang and Y. Wang and S. Y. Wu and Y. C. Wu and H. Y. Xing and Y. Xu and T. Xue and S. W. Yang and N. Yi and C. X. Yu and H. J. Yu and J. F. Yue and X. H. Zeng and M. Zeng and Z. Zeng and F. S. Zhang and Y. H. Zhang and M. G. Zhao and J. F. Zhou and Z. Y. Zhou and J. J. Zhu and Z. H. Zhu},
journal= {arXiv preprint arXiv:1810.08808},
year = {2018}
}
Comments
version accepted by SCPMA, 8 pages, 11 figures and 2 tables