等时性模式奇异核的质量测量(Isochronous Mass Measurement)是兰州重离子冷却储存环(HIRFL-CSR)上的物理研究项目之一。离子在CSRe中回旋时,每次穿过飞行时间探测器产生的信号经放大后由数字示波器DPO 71254采集。基于LabView和TekVISA的获取程序被开发出来用于自动存储示波器采集的数据、显示时域波形及在线分析得到离子飞行时间的频谱。主要介绍了CSRe上等时性模式奇异核质量测量的方法、数据获取系统及测量结果。
Isochronous mass measurement is one of physics research projects at CSRe of HIRFL-CSR.The signals induced by circulating ions are amplified and sampled with a digital oscilloscope Tektronix DPO 71254 at a sampling rate of 50 GSa/s.The record length of one injection is 200μs.A program based on LabView and TekVISA is developed to automatically save the sampled data and display the time domain waveform.The program is also designed to on-line analyze the data to get the power spectrum of circulating ions.Principle of isochronous mass measurement at CSRe and the data acquisition system are introduced,and the application results are reported.