Prepared for submission to JINST Horizontal Position Reconstruction in PandaX-II PandaX Collaboration

Dan Zhang,Andi Tan,Abdusalam Abdukerim,Wei Chen,Xun Chen, Yunhua, Chen,Chen Cheng,Xiangyi Cui,Yingjie Fan,Deqing Fang,Changbo Fu, Mengting, Fu,Lisheng Geng,Karl Giboni,Linhui Gu,Xuyuan Guo,Ke Han,Changda He, Yan Huang,Yanlin Huang,Zhou Huang,Xiangdong Ji,Yonglin Ju,Shuaijie Li, Qing Lin, Huaxuan Liu,Jianglai Liu,Liqiang Liu,Xiaoying Lu,Yugang Ma,Yajun Mao,Yue Meng, Parinya, Namwongsa,Jinhua Ning,Xuyang Ning,Xiangxiang Ren, Nasir, Shaheed,Changsong Shang,Guofang Shen,Anqing Wang,Qiuhong Wang,Siguang Wang, Xiuli Wang, Zhou, Wang,Mengmeng Wu,Shiyong Wu,Weihao Wu,Jingkai Xia,Mengjiao Xiao, Xiang, Xiao,Pengwei Xie,Binbin Yan,Jijun Yang,Yong Yang,Chunxu Yu,Jumin Yuan,Ying Yuan,Xinning Zeng,Tao Zhang,Li Zhao,Qibin Zheng,Jifang Zhou, Ning,Xiaopeng Zhou

semanticscholar（2021）

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摘要

Dual-phase noble-gas time projection chambers (TPCs) have improved the sensitivities for dark matter direct search in past decades. The capability of TPCs to reconstruct 3-D vertexes of keV scale recoilings is one of the most advantageous features. In this work, we develop two horizontal position reconstruction algorithms for the PandaX-II darkmatter search experiment using the dual-phase liquid xenon TPC. Both algorithms are optimized by the 83mKr calibration events and use photon distribution of ionization signals among photomultiplier tubes to infer the positions. According to the events coming from the gate electrode, the uncertainties in the horizontal positions are 3.4 mm (3.9 mm) in the analytical (simulation-based) algorithm for an ionization signal with several thousand photon electrons in the center of the TPC.

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