波谱学杂志2017，Vol.34Issue(1)：87-99,13.DOI:10.11938/cjmr20170111
高性能核磁共振弛豫分析仪匀场系统的设计与实现
Design and Implementation of An Active Shimming System for Low-Field NMR Analyzers
摘要
Abstract
High homogeneity of the magnet field is an essential prerequisite for measuring weak signals and short spin-spin relaxation time on a nuclear magnetic resonance (NMR) analyzer. In this study, we designed active shimming coils, based on a target-field approach, for low filed NMR analyzers. Constant current source was designed according to the coil power supply. An active shimming platform used in a NMR analyzer's 0.45 T magnet system was constructed over a large target-diameter-sphere-volume (25.4 mm DSV) of interest. The basic structure and operation principles of the system, as well as the shimming method, were introduced. The feasibility and practicality of the design was demonstrated by experimental measurements.关键词
低场核磁共振(low-fieldNMR)/有源匀场/目标场法/恒流源/自由感应衰减(FID)Key words
low-field NMR/active shimming/target-field approach/constant current source/free induction decay (FID)分类
数理科学引用本文复制引用
陈珊珊,夏天,毕昕,苗志英,杨培强,汪红志,戴曙光..高性能核磁共振弛豫分析仪匀场系统的设计与实现[J].波谱学杂志,2017,34(1):87-99,13.基金项目
国家重大科学仪器设备开发专项(2013YQ170463). （2013YQ170463）
