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Abstract <p>Searching for the neutrinoless double beta decay (<InlineEquation ID="IEq3"> <EquationSource Format="TEX">\({0{\nu}{\beta}{\beta}}\)</EquationSource> <!--NuclPhys2560202Liang-m3--> </InlineEquation>) is crucial for studying the properties of neutrinos. Time projection chamber (TPC), with good energy resolution and track information, is an available technique. In <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(\textrm{N}\nu\textrm{DEx}\)</EquationSource> <!--NuclPhys2560202Liang-m4--> </InlineEquation> experiment, we proposed a TPC with high pressure <InlineEquation ID="IEq5"> <EquationSource Format="TEX">\({}^{82}\textrm{SeF}_{6}\)</EquationSource> <!--NuclPhys2560202Liang-m5--> </InlineEquation> to search for <InlineEquation ID="IEq6"> <EquationSource Format="TEX">\({0{\nu}{\beta}{\beta}}\)</EquationSource> <!--NuclPhys2560202Liang-m6--> </InlineEquation> of <InlineEquation ID="IEq7"> <EquationSource Format="TEX">\({}^{82}\textrm{Se}\)</EquationSource> <!--NuclPhys2560202Liang-m7--> </InlineEquation>, which will be deployed in China Jinping Underground Laboratory. To achieve best energy resolution as possible, the readout plane consisting of about 10k custom-designed Topmetal-S chips are being developed for direct charge collection. The effective noise charge of the current generation Topmetal-S chip is presented, depending on the operational point and test condition. Understanding the gas properties is important for <InlineEquation ID="IEq8"> <EquationSource Format="TEX">\(\textrm{N}\nu\textrm{DEx}\)</EquationSource> <!--NuclPhys2560202Liang-m8--> </InlineEquation> experiment. With laser beam and a small TPC, we observed the minority and majority charge carriers in structurally similar <InlineEquation ID="IEq9"> <EquationSource Format="TEX">\(\textrm{SF}_{6}\)</EquationSource> <!--NuclPhys2560202Liang-m9--> </InlineEquation> gas with electric fields from 735 to 1351 V/cm and pressures from 377 to 750 Torr, which paves the way for future study of the <InlineEquation ID="IEq10"> <EquationSource Format="TEX">\(\textrm{SeF}_{6}\)</EquationSource> <!--NuclPhys2560202Liang-m10--> </InlineEquation> gas.</p>

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Studies of Charge Sensor and Gas Properties of an Ion-TPC for N\(\nu\)DEx Experiment

  • 期刊论文

  • 发表日期：

    2025年12月1日

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  • Tianyu Liang,
  • Meiqiang Zhan,
  • Hulin Wang,
  • Xianglun Wei,
  • Dongliang Zhang,
  • Lei Lang,
  • Yongqiang Yang,
  • Jun Liu,
  • Chengui Lu,
  • Qiang Hu,
  • Yichen Yang,
  • Chaosong Gao,
  • Le Xiao,
  • Xiangming Sun,
  • Feng Liu,
  • Chengxin Zhao,
  • Hao Qiu,
  • Kai Chen

摘要

Abstract

Searching for the neutrinoless double beta decay ( \({0{\nu}{\beta}{\beta}}\) ) is crucial for studying the properties of neutrinos. Time projection chamber (TPC), with good energy resolution and track information, is an available technique. In \(\textrm{N}\nu\textrm{DEx}\) experiment, we proposed a TPC with high pressure \({}^{82}\textrm{SeF}_{6}\) to search for \({0{\nu}{\beta}{\beta}}\) of \({}^{82}\textrm{Se}\) , which will be deployed in China Jinping Underground Laboratory. To achieve best energy resolution as possible, the readout plane consisting of about 10k custom-designed Topmetal-S chips are being developed for direct charge collection. The effective noise charge of the current generation Topmetal-S chip is presented, depending on the operational point and test condition. Understanding the gas properties is important for \(\textrm{N}\nu\textrm{DEx}\) experiment. With laser beam and a small TPC, we observed the minority and majority charge carriers in structurally similar \(\textrm{SF}_{6}\) gas with electric fields from 735 to 1351 V/cm and pressures from 377 to 750 Torr, which paves the way for future study of the \(\textrm{SeF}_{6}\) gas.