A new positron annihilation lifetime spectrometer based on DRS4 waveform digitizing board  

作　　者：安然 成斌 刘艳芬 叶邦角 孔伟 Stefan Ritt 

机构地区：[1]State Key Laboratory of Particle Detection and Electronics,Department of Modern Physics,University of Science and Technology of China [2]Paul Scherrer Institute(PSI)

出　　处：《Chinese Physics C》2014年第5期48-52,共5页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11175171,10835006,11105139,10975133)

摘　　要：A new simple digital positron lifetime spectrometer has been developed. It includes a DRS4 waveform digitizing board and two scintillation detectors based on the XP2020Q photomultiplier tubes and LaBr3 scintillators. The DRS4 waveform digitizing can handle small pulses, down to few tens of millivolts, and its time scale linearity and stability are very good. The new system has reached a 206 ps time resolution, which is better than the conventional analog apparatus using the same detectors. These improvements make this spectrometer more simple and convenient in comparison with other spectrometers, and it can be applied to the other scintillation timing measurements with picosecond accuracy.Abstract： A new simple digital positron lifetime spectrometer has been developed. It includes a DRS4 waveform digitizing board and two scintillation detectors based on the XP2020Q photomultiplier tubes and LaBr3 scintillators. The DRS4 waveform digitizing can handle small pulses, down to few tens of millivolts, and its time scale linearity and stability are very good. The new system has reached a 206 ps time resolution, which is better than the conventional analog apparatus using the same detectors. These improvements make this spectrometer more simple and convenient in comparison with other spectrometers, and it can be applied to the other scintillation timing measurements with picosecond accuracy.

关 键 词：digital lifetime spectrometer TIMING waveform sampling DRS4 chip 

分 类 号：TH744.1[机械工程—光学工程]