Julin Jaakko, Arstila Kai, Sajavaara Timo
Department of Physics, University of Jyväskylä, P.O. Box 35, FI-40014 Jyväskylä, Finland.
Rev Sci Instrum. 2016 Aug;87(8):083309. doi: 10.1063/1.4961577.
The performance of a time-of-flight spectrometer consisting of two timing detectors and an ionization chamber energy detector has been studied using Monte Carlo simulations for the recoil creation and ion transport in the sample and detectors. The ionization chamber pulses have been calculated using Shockley-Ramo theorem and the pulse processing of a digitizing data acquisition setup has been modeled. Complete time-of-flight-energy histograms were simulated under realistic experimental conditions. The simulations were used to study instrumentation related effects in coincidence timing and position sensitivity, such as background in time-of-flight-energy histograms. Corresponding measurements were made and simulated results are compared with data collected using the digitizing setup.
利用蒙特卡罗模拟研究了由两个定时探测器和一个电离室能量探测器组成的飞行时间光谱仪在样品和探测器中的反冲产生及离子传输情况。使用肖克利 - 拉莫定理计算了电离室脉冲，并对数字化数据采集装置的脉冲处理进行了建模。在实际实验条件下模拟了完整的飞行时间 - 能量直方图。这些模拟用于研究符合定时和位置灵敏度方面与仪器相关的效应，例如飞行时间 - 能量直方图中的本底。进行了相应的测量，并将模拟结果与使用数字化装置收集的数据进行了比较。
