Earticle

초록

영어

To obtain Nuclear Magnetic Resonance (NMR) measurement of membrane protein, an NMR magnet is required to generate high intensity, homogeneity, and stability of field. A High-Temperature Superconducting (HTS) magnet is a promising alternative to a conventional Low-Temperature Superconducting (LTS) NMR magnet for high field, current density, and stability margin. Conventionally, an HTS coil has been wound by several winding techniques such as Single-Pancake (SP), Double-Pancake (DP), and layer-wound. The DP winding technique has been frequently used for a large magnet because long HTS wire is generally difficult to manufacture, and maintenance of magnet is convenient. However, magnetic field generated by the slanted turns and the splice leads to field inhomogeneity in Diameter of Spherical Volume (DSV). The field inhomogeneity degrades performance of NMR spectrometer and thus effect of the slanted turns and the splice should be analyzed. In this paper, field gradient of HTS double-pancake coils considering the slanted turns and the splice was calculated using Biot-Savart law and numerical integration. The calculation results showed that magnetic field produced by the slanted turns and the splice caused significant inhomogeneity of field.

목차

Abstract
 1. INTRODUCTION
 2. BASIC FORMULA
  2.1. Biot-Savart law
  2.2. Modeling with thin half elliptical wire
  2.3. Modeling with thick half elliptical wire
 3. NUMERICAL INTEGRATION
  3.1. Romberg integration algorithm
  3.2. Verification of the developed program
 4. FIELD GRADIENT CALCULATION
  4.1. Spherical harmonics expansion
  4.2. Simulation results
 5. CONCLUSIONS
 ACKNOWLEDGMENT
 REFERENCES

키워드

저자

• Geonwoo Baek [ Yonsei University, Seoul, Korea ]
• Jinsub Kim [ Yonsei University, Seoul, Korea ]
• Woo Seung Lee [ JH ENGINEERING CO., LTD., Gunpo, Korea ]
• Seunghyun Song [ Yonsei University, Seoul, Korea ]
• Onyou Lee [ Korea National University of Transportation, Chungju, Korea ]
• Hyoungku Kang [ Korea National University of Transportation, Chungju, Korea ]
• Tae Kuk Ko [ Yonsei University, Seoul, 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