正电子寿命谱仪探测器的输出影响因素和选择

A Study of the Factors Affecting the Properties of Detector of Lifetime Spectrometer of Positron Annihilation

本文研究了正电子湮没寿命谱仪探测器的输出影响因素。两个最重要的影响因素是光电倍增管和BaF_2晶体之间的光学耦合以及光电倍增管上所加的高压,我所正电子湮没寿命谱仪探测器所使用的高压选择为2.45kV,2.57kV,两个探测器的输出电压是1.8V。

The factors affecting the output properties of the detectors of positron annihilation lifetime spectrometer have been studied. It is shown that the optical coupling between BaF2 crystal and photo multiplier and the voltage applied to photo multiplier are two of the most important factors. The selected voltage applied to photo multiplier should be 2.45kV, 2.57kV and output voltage of detector should be 1.8V for our institute's positron annihilation lifetime spectrometer.