Author:
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.
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 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.
Subject
Mathematical Physics,Instrumentation