Earticle

초록

영어

We had proposed a winding method so called “Wind-and-Flip”, which enables a persistent current operation of an HTS pancake coil without any electrical joint. In order to improve the magnetic field drift characteristics, a prototype HTS coil with the technique was fabricated, and tested under various temperatures. Because the coil doesn’t have any electric terminals for current leads, an HTS background magnet was used to induce the persistent current in the coil by field cooling process. A conduction cooling system with a GM cryocooler was prepared to keep the operating temperatures of the prototype coil much below the 77 K. We investigated the magnetic field drift characteristics under the various operating temperatures by measuring the center magnetic field with a cryogenic Hall sensor. The persistent current mode operation at 20 ~ 50K showed a strong possibility of the winding technique for the application such as MRI or NMR.

목차

Abstract
 1. INTRODUCTION
 2. EXPERIMENTSAL SETUPS
  2.1. Design of the prototype coil
  2.2. Fabrication of the coil
  2.3. Background magnet
  2.4. Cryogenic system
 3. TEST RESULTS AND DISCUSSIONS
  3.1. Field cooling test
  3.2. Long-term test
  3.3. Temperature dependency
 4. CONCLUSION
 ACKNOWLEDGMENT
 REFERENCES

키워드

저자

• Kyeongdal Choi [ Department of Energy & Electrical Engineering, Korea Polytechnic University, Siheung, Korea ]
• Seyeon Lee [ Department of Energy & Electrical Engineering, Korea Polytechnic University, Siheung, Korea ]
• Woo-Seok Kim [ Department of Energy & Electrical Engineering, Korea Polytechnic University, Siheung, Korea ]
• Sang Min Lee [ Department of Radiology, CHA Bundang Medical Center, CHA University, Seongnam, 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