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<p>A 32-channel charge-sensitive amplifier (CSA) is&#xa0;designed for fast timing in the delay-line readout of a parallel plate avalanche counter (PPAC) array. It&#xa0;is realized on a PCB with operational amplifiers and other discrete components. Each channel consists of an integrator, a pole-zero cancellation net, and a linear amplification stage, which can be adapted to accommodate either positive or negative input signals. The RMS equivalent input noise charges are 3.3 fC, the conversion gains are approximately <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\pm 2\mathrm {\ mV/fC}\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo>±</mo> <mn>2</mn> <mrow> <mspace width="4pt" /> <mi mathvariant="normal">mV</mi> <mo stretchy="false">/</mo> <mi mathvariant="normal">fC</mi> </mrow> </mrow> </math></EquationSource> </InlineEquation>, and the intrinsic time resolution reaches 32 ps. In the prototype PPAC application, the CSA performs as well as the commercial FTA820A amplifier, providing a position resolution as good as 0.17 mm, and exhibiting reliable stability during several hours of continuous data acquisition.</p>

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A 32-channel charge-sensitive amplifier for delay-line readout of parallel plate avalanche counter array

  • 期刊论文

  • 发表日期：

    2025年12月6日

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  • Yue-Zhao Zhang,
  • Peng Ma,
  • Zhuang-Yu Lin,
  • Zhen-Fei Tan,
  • Xing-Chi Han,
  • Chen Liu,
  • Shuo Wang,
  • Da-Peng Sun,
  • Zhi-Quan Li,
  • En-Hong Wang,
  • Shou-Yu Wang

摘要

A 32-channel charge-sensitive amplifier (CSA) is designed for fast timing in the delay-line readout of a parallel plate avalanche counter (PPAC) array. It is realized on a PCB with operational amplifiers and other discrete components. Each channel consists of an integrator, a pole-zero cancellation net, and a linear amplification stage, which can be adapted to accommodate either positive or negative input signals. The RMS equivalent input noise charges are 3.3 fC, the conversion gains are approximately \(\pm 2\mathrm {\ mV/fC}\) ± 2 mV / fC , and the intrinsic time resolution reaches 32 ps. In the prototype PPAC application, the CSA performs as well as the commercial FTA820A amplifier, providing a position resolution as good as 0.17 mm, and exhibiting reliable stability during several hours of continuous data acquisition.