报告详情
An Integrated Approach to Shim Coil Design and Current Regulation for NMR Systems
编号：111
访问权限：仅限参会人
更新：2025-10-13 11:25:12 浏览：9次
张贴报告
报告开始：暂无开始时间（Asia/Shanghai）
报告时间：暂无持续时间
所在会场：[暂无会议] [暂无会议段]
暂无文件
摘要
Magnetic field homogeneity is a key determinant of signal sensitivity and spectral resolution in high-field nuclear magnetic resonance (NMR) systems. To address the limitations of conventional active shimming techniques—namely, the restricted precision of shim coil design, the time-consuming iterative adjustment of coil currents, and the lack of robustness validation against engineering errors—this paper proposes an integrated approach that combines shim coil design with current optimization. First, first- to third-order shim coils are designed using the target field method and the stream function method. A genetic algorithm is then employed to explore a wide range of current combinations and identify a “near-optimal solution region,” followed by gradient-based refinement to obtain the optimal shim current set. To verify the practical engineering applicability of the proposed method, a 5T NMR system was selected as the research object. Monte Carlo simulation was used to model the wire dimension tolerance and coil position tolerance, generating 1000 sets of magnetic field drift data. The shimming results showed that this method can reduce the peak-to-peak magnetic field inhomogeneity within a 10mm-diameter spherical target volume (DSV) from an initial maximum of 937.7ppm to 7.2ppm, significantly outperforming traditional methods in efficiency and stability.
关键词
superconducting magnet,active shimming,Nuclear magnetic resonance,Genetic Algorithm (GA)
报告人
Xunhuang Jiang
Student Huazhong University of Science and Technology；Wuhan National High Magnetic Field Center稿件作者
全部评论
重要日期
-
会议日期
11月07日
2025
至11月09日
2025
-
10月12日 2025
初稿截稿日期
-
10月30日 2025
注册截止日期
主办单位
IEEE西南交通大学IAS学生分会
承办单位
西南交通大学电气工程学院
SPACI车网关系研究室
四川大学电力系统稳定与高压直流输电研究团队
SPACI车网关系研究室
四川大学电力系统稳定与高压直流输电研究团队
发表评论