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An Integrated Approach to Shim Coil Design and Current Regulation for NMR Systems
ID：111 View Protection：ATTENDEE Updated Time：2025-10-13 11:25:12 Hits：271 Poster Presentation

Start Time：2025-11-09 09:10（Asia/Shanghai）

Duration：1min

Session：P Poster presentation » P66.AI-driven technology

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Abstract
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.
Keywords
superconducting magnet,active shimming,Nuclear magnetic resonance,Genetic Algorithm (GA)
Speaker
Xunhuang Jiang
Student Huazhong University of Science and Technology；Wuhan National High Magnetic Field Center

Submission Author
Xunhuang Jiang Huazhong University of Science and Technology；Wuhan National High Magnetic Field Center
Yunxing Song State Key Laboratory of Advanced Electromagnetic Technology； Huazhong University of Science and Technology;Wuhan National High Magnetic Field Center； Huazhong University of Sci-ence and Technology
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Important Date

  • Conference Date

    Nov 07

    2025

    to

    Nov 09

    2025

  • Oct 30 2025

    Draft paper submission deadline

  • Nov 10 2025

    Registration deadline

Sponsored By
IEEE西南交通大学IAS学生分会
Organized By
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
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