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<p>The semicylindrical time projection chamber (scTPC) is designed to measure the angular distribution of the cross section for intermediate-energy (<sup>3</sup>He,<i>t</i>) charge-exchange reactions in inverse kinematics. The scTPC prototype comprises a cathode, field cage, drift region, amplification structure based on a multilayer thick gas electron multiplier (THGEM), and a readout plane with 886 zigzag-shaped pads. The gain uniformity of the THGEM and the drift velocity of electrons were calibrated. Track recognition based on the Hough transform was then developed to reconstruct cosmic ray tracks and determine their position resolution. The position resolution of secondary particle tracks resulting from collisions between the heavy-ion beam and the <sup>3</sup>He target was measured, yielding an <i>x</i>-resolution of 0.71&#xa0;mm and a <i>z</i>-resolution of 0.73&#xa0;mm. The scTPC demonstrates sufficient energy and spatial resolution to support charge-exchange reaction experiments in inverse kinematics.</p>

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Performance study of THGEM-based semicylindrical TPC for intermediate-energy charge-exchange reaction experiments in inverse kinematics

  • 期刊论文

  • 发表日期：

    2025年3月20日

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  • Zhi-Xuan He,
  • Pan-Jiao Shen,
  • Jing-Yan Wang,
  • Wen-Juan Bu,
  • Zhou-Bo He,
  • Zhi-Jie Li,
  • Yuan-Sheng Yang,
  • Xiao-Lei Chen,
  • Chen-Gui Lu,
  • Peng Ma,
  • He-Run Yang,
  • Li-Min Duan,
  • Bi-Tao Hu,
  • Xiang-Lun Wei,
  • Yi Zhang

摘要

The semicylindrical time projection chamber (scTPC) is designed to measure the angular distribution of the cross section for intermediate-energy (3He,t) charge-exchange reactions in inverse kinematics. The scTPC prototype comprises a cathode, field cage, drift region, amplification structure based on a multilayer thick gas electron multiplier (THGEM), and a readout plane with 886 zigzag-shaped pads. The gain uniformity of the THGEM and the drift velocity of electrons were calibrated. Track recognition based on the Hough transform was then developed to reconstruct cosmic ray tracks and determine their position resolution. The position resolution of secondary particle tracks resulting from collisions between the heavy-ion beam and the 3He target was measured, yielding an x-resolution of 0.71 mm and a z-resolution of 0.73 mm. The scTPC demonstrates sufficient energy and spatial resolution to support charge-exchange reaction experiments in inverse kinematics.