论文标题
当前敏感前置放大器的噪声分析以及对NAI能量分辨率的影响：TL检测器系统
Noise Analysis of Current Sensitive Preamplifiers and Influence on Energy Resolution of NaI:Tl Detector System
论文作者
论文摘要
当前敏感的前置放大剂（CSP）由于能够直接扩增信号而广泛用于数据获取系统（DAQ）的前端电子产品。能量分辨率的优化需要具有合适参数的CSP，例如增益，带宽和低噪声等。随着CSP的带宽和反式阻抗增益的快速改善，有必要知道CSPS的输出噪声如何影响能量分辨率。为此，我们构建了CSP的噪声模型，并根据不同的商业操作放大器（OP放大器）分析了CSP的输出噪声电压密度。理论和实验结果表明，在能量分辨率方面，输入噪声电压密度低的OP放大器比其他放大器优越。此外，已经定义了噪声归一化因子，以验证CSP的能量分辨率与噪声之间的关系。实验结果表明，能量分辨率和噪声归一化因子是线性符合的。本文可以提供有关选择商业运算放大器以设计CSP的参考，以优化能源分辨率。
Current Sensitive Preamplifiers (CSPs) are widely used in front-end electronics in data acquire system (DAQ), due to their ability to amplify signals directly. The optimization of energy resolution requires CSPs with suitable parameters such as gain, bandwidth, and low noise, etc. With the rapid improvement of CSP's bandwidth and trans-impedance gain, it is necessary to know how does the output noise of CSPs effect the energy resolution. For this purpose, we built the noise model of CSPs and analyzed the output noise voltage density of CSPs based on different commercial operation amplifiers (OP AMPs). Theoretical and experimental results shown that OP AMPs with low input noise voltage density is superior than others on energy resolution. Moreover, noise normalization factor has been defined to verify the relationship between energy resolution and noise of CSPs. The experimental results shown that the energy resolution and noise normalization factor are linearly conformable. This paper can provide reference on selecting commercial OP AMPs to design CSPs for optimization of energy resolution.
