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首页> 外文会议>Smart Photonic and Optoelectronic Integrated Circuits XVIII >Analysis of position error by time constant in read-out resistive network for gamma-ray imaging detection system
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Analysis of position error by time constant in read-out resistive network for gamma-ray imaging detection system

机译：伽马射线成像检测系统中读出电阻网络中时间常数的位置误差分析

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摘要

Position-sensitive photomultiplier tubes (PSPMTs) in array are used as gamma ray position detector. Each PMT converts the light of wide spectrum range (100 nm ～ 2500 nm) to electrical signal with amplification. Because detection system size is determined by the number of output channels in the PSPMTs, resistive network has been used for reducing the number of output channels. The photo-generated current is distributed to the four output current pulses according to a ratio by resistance values of resistive network. The detected positions are estimated by the peak value of the distributed current pulses. However, due to parasitic capacitance of PSPMTs in parallel with resistor in the resistive network, the time constants should be considered. When the duration of current pulse is not long enough, peak value of distributed pulses is reduced and detected position error is increased, In this paper, we analyzed the detected position error in the resistive network and variation of time constant according to the input position of the PSPMTs.
机译：阵列中的位置敏感光电倍增管（PSPMT）用作伽马射线位置检测器。每个PMT都会将宽光谱范围（100 nm〜2500 nm）的光转换为具有放大作用的电信号。由于检测系统的大小由PSPMT中的输出通道数决定，因此电阻网络已被用于减少输出通道数。光生电流根据电阻网络的电阻值按比例分配给四个输出电流脉冲。通过分布的电流脉冲的峰值来估计检测到的位置。但是，由于PSPMT的寄生电容与电阻网络中的电阻并联，因此应考虑时间常数。当电流脉冲的持续时间不够长时，分布脉冲的峰值减小，检测到的位置误差增大，本文根据电阻输入的位置分析了电阻网络中检测到的位置误差和时间常数的变化。 PSPMT。

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  • 来源
  • 会议地点 San Francisco CA(US)
  • 作者

    Su-Jin Jeon; Chang-In Park; Byung-Hee Son; Mi Jung; Teak-Jin Jang; Chun-Sik Lee; Young-Wan Choi;

  • 作者单位

    School of Electrical and Electronics Engineering, Chung-Ang University, 221, Heuksuk-dong, Dongjak-gu, Seoul, 156-756, Korea, Republic of;

    School of Electrical and Electronics Engineering, Chung-Ang University, 221, Heuksuk-dong, Dongjak-gu, Seoul, 156-756, Korea, Republic of;

    School of Electrical and Electronics Engineering, Chung-Ang University, 221, Heuksuk-dong, Dongjak-gu, Seoul, 156-756, Korea, Republic of;

    School of Electrical and Electronics Engineering, Chung-Ang University, 221, Heuksuk-dong, Dongjak-gu, Seoul, 156-756, Korea, Republic of;

    Department of Physics, Chung-Ang University, 221, Heuksuk-dong, Dongjak-gu, Seoul, 156-756, Korea, Republic of;

    Department of Physics, Chung-Ang University, 221, Heuksuk-dong, Dongjak-gu, Seoul, 156-756, Korea, Republic of;

    School of Electrical and Electronics Engineering, Chung-Ang University, 221, Heuksuk-dong, Dongjak-gu, Seoul, 156-756, Korea, Republic of;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Gamma-ray imaging detection system; resistive network; detected position error; time constant;

    机译：伽玛射线成像检测系统；电阻网络检测到位置错误；时间常数;

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