Horizontal position reconstruction in PandaX-II. (30th November 2021)

• Record Type: Journal Article
• Authors: Zhang, D.; Tan, A.; Abdukerim, A.; Chen, W.; Chen, X.; Chen, Y.; Cheng, C.; Cui, X.; Fan, Y.; Fang, D.; Fu, C.; Fu, M.; Geng, L.; Giboni, K.; Gu, L.; Guo, X.; Han, K.; He, C.; He, S.; Huang, D.; Huang, Y.; Huang, Y.; Huang, Z.; Ji, X.; Ju, Y.; Li, S.; Lin, Q.; Liu, H.; Liu, J.; Liu, L.; Lu, X.; Ma, W.; Ma, Y.; Mao, Y.; Meng, Y.; Namwongsa, P.; Ni, K.; Ning, J.; Ning, X.; Ren, X.; Shaheed, N.; Shang, C.; Shen, G.; Si, L.; Wang, A.; Wang, H.; Wang, M.; Wang, Q.; Wang, S.; Wang, W.; Wang, X.; Wang, Z.; Wu, M.; Wu, S.; Wu, W.; Xia, J.; Xiao, M.; Xiao, X.; Xie, P.; Yan, B.; Yang, J.; Yang, Y.; Yu, C.; Yuan, J.; Yuan, Y.; Zeng, X.; Zhang, T.; Zhao, L.; Zheng, Q.; Zhou, J.; Zhou, N.; Zhou, X.;
• Other Names: collab.
• Is Part Of: Journal of instrumentation. Volume 16:Number 11(2021)
• Publication Date: 2021-11-30
• Subjects: Dark Matter detectors (WIMPs, axions, etc.) -- Time projection chambers -- Noble liquid detectors (scintillation, ionization, double-phase) -- Photon detectors for UV, visible and IR photons (vacuum) (photomultipliers, HPDs, others); Scientific apparatus and instruments -- Periodicals; 502.84
• DOI: 10.1088/1748-0221/16/11/P11040
• Languages: English
• ISSNs: 1748-0221

Abstract

Abstract: 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 dark matter search experiment using the dual-phase liquid xenon TPC. Both algorithms are optimized by the 83 mKr 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.