基于高温DC-SQUID的低场核磁共振仪  

Low Field NMR System Based on High T_c DC-SQUID

作　　者：李绍[1] 储海峰[1] 田野[1] 任育峰[1] 陈莺飞[1] 陈赓华[1] 郑东宁[1] 

机构地区：[1]中科院物理研究所,北京100080

出　　处：《稀有金属材料与工程》2008年第A04期362-365,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金委员会和973项目资助(10534060)

摘　　要：研制了一套基于高温DC-SQUID的低场核磁共振仪(NMR)。它由磁场系统,系统控制软件和DC-SQUID测量仪器组成。首先,由磁场计算值设计和制作了SQUID低场NMR的磁场系统(各个线圈的几何尺寸及其相对位置);然后,用LabVIEW编写了测量系统的控制程序,实现了系统参数的控制测量和数据采集的自动化;最后,联合调试使测量系统满足原先设计的要求。经核实和多次重复测量证明各部件的性能很好并能按设计的要求工作。磁场的测量值在理论计算值的误差范围之内:预极化场可以达到10mT,测量磁场可以在200μT和1μT之间调节。更进一步的测试和分析还在进行中。We developed a low field NMR system, which consisting of three parts based on High Tc DC-SQUID. First, the parameters and the relative location of the coils were designed on the basis of thoretical calculation. We made the prepolarization field reached 10mT and the measurement field changed between 200 μT and 1 μT. Second, based on the LabVIEW platform, we designed a programm, by which automatic measurement and data acquisition were achieved perfectly. At last, we fulfilled the test of the SQUID and the system electronics, and all the parts worked well during the process of the comprehensive test. Further experiment and analysis on the system were in process.

关 键 词：核磁共振 超导量子干涉仪 LABVIEW 

分 类 号：TH83[机械工程—仪器科学与技术]