基于LabVIEW的飞秒超快动力学数据采集系统

Data Acquisition System for Femtosecond Ultrafast Dynamics Based on LabVIEW

飞秒泵浦-探测技术是一种可以在原子运动时间尺度上实时观测化学反应的有力手段.在飞秒泵浦-探测技术基础上发展起来的分子超快动力学是当前分子反应动力学研究领域的热点和焦点之一.在分子超快动力学的研究过程中,往往需要建立一套高速的数据采集、处理以及分析系统.用LabVIEW程序编写该系统的软件部分,能够完成对飞行时间质谱及其谱峰面积的实时采集.本文介绍了该系统的硬件组成以及软件设计,并把该系统用于邻二氯苯的超快动力学研究中,观察到了二氯苯母体和碎片的寿命.

Femtosecond pump-probe technique is a powerful tool that can observe the atomic-scale chemical reaction in real-time. Molecular ultrafast dynamics based on femtosecond pump-probe technique is currently one of the most hot topics molecular reaction dynamics. For the study of femtosecond ultrafast dynamics, a high-speed data sampling, processing and analyzing system was developed. This system, which was programmed by graphic language LabVIEW, can be used to measur,： mass spectroscopy and relevant peak area synchronously, so it is suitable for continuously monitoring of the ion signal intensity with the pump-detecting changes in the extension process. The detail discussions on the design of the hardware and softwme are given in this paper, which got good application in the experimental process. In the study of o-dichlorobenzene ultrafast dy- namics experiment, we observed the lifetime of parent and fragments of dichlorobenzene.