Earticle

초록

영어

In this paper we present design and optimization of shimming coils to correct low-order field gradient components deteriorated by screening currents in high-temperature superconducting (HTS) NMR magnets. The unique geometry of HTS wires induces screening currents, which generate low-order field gradients that degrade the magnetic field quality. To compensate the low-order field gradients, high-strength low-order shimming coils were designed. At first, the target field method was employed to derive the initial shapes of the shimming coils. Subsequently, a genetic algorithm (GA) was utilized to optimize the coil geometries, ensuring ease of fabrication while maintaining high performance. The performance of the optimized coils was validated through virtual field mapping and COMSOL simulations, demonstrating their effectiveness in compensating for targeted gradients with correction efficiencies exceeding 99%. The experimental evaluation will be carried out following the fabrication of the shimming coil in accordance with the proposed design.

목차

Abstract
1. INTRODUCTION
2. OPTIMIZED DESIGN OF THE LOW ORDER SHIMMING COILS
2.1. Design method
2.2 Design results
3. VALIDATION OF THE SHIMMING COIL DESIGN
3.1. Verification of field gradient components Using Numerical Analysis
3.2. Verification of magnetic field distribution Using Finite Element Method (COMSOL)
4. CONCLUSION
ACKNOWLEDGMENT
REFERENCES

키워드

저자

• J. Han [ Korea University of Technology and Education (KOREATECH), Cheonan, Korea ]
• B. Seo [ Korea University of Technology and Education (KOREATECH), Cheonan, Korea ]
• J. Y. Jang [ Korea University of Technology and Education (KOREATECH), Cheonan, Korea ] Corresponding Author

참고문헌

발행기관

간행물

표지보기 관심저널 등록

• 간행물명

  한국초전도·저온논문지 (구 한국초전도저온공학회논문지) [Progress in Superconductivity and Cryogenics]

• 간기

  계간

• pISSN

  1229-3008

• eISSN

  2287-6251

• 수록기간

  1999~2026

• 등재여부

  KCI 등재,SCOPUS

• 십진분류

  KDC 427 DDC 537