配备于自旋回波仪的计算机系统

本文介绍配备在自旋回波仪中的计算机系统,由TP-801计算机、外围设备、接口电路和一套应用软件组成。该系统可以产生自旋回波实验所需要的多种脉冲序列,包括90°-90°、90°-180°、180°-90°、Carr-Purcell序列等。同时,计算机采集回波信号或FID,并进行数据处理,其结果可以直接由计算机或示波器、绘图仪显示,也可以存入磁带。仪器可以快速准确地测量弛豫时间T₁、T₂,也适用于核磁共振自旋回波方面的教学。在本文结束部分给出了一些样品的测量结果。本文介绍的计算机系统可以和普通的CW-NMR谱仪结合,使之增加自旋回波测量功能。

THE COMPUTER SYSTEM OF SPTN-ECHO SPECTROMETER

This article describes trie computer system of spin-echo spectrometer, which consists mainlc of TP-801 computer, peripheral devices, interface circuits and a set of applied software The system can produce various pulse sequences, which meet the requirement of spin-echo experiments, including 90-90,90-180, 180-90 and carr-purcell pulse sequences etc. At the same time, the computer system acquires FID and spin-echo signals and processes data collected. The results can be shown directly on oscilloscope and plotter, and also can be stored in tape. Relaxation time T₁ and T₂ can be measured fast and accurately. It also can be used in teaching of NMR spin-echo. In the last part of this article, results of measurement of a group of samples are given. The computer system described by this article is also fit to combine with general CW-NMR spectrometer to enable it to have function of spin-echo measurement.