Quench Behavior of 2G HTS Coils With Polyimide Film and MIT Material Under Over Pulse-Current

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Abstract
This paper presents the quench behavior of second-generation (2G) high-temperature superconducting (HTS) coil insulated with a Kapton polyimide film or metal-insulator transition (MIT) materials, which could enhance the thermal stability and magnetic field-control performance of a 2G HTS magnet. For the quench test, overcurrent experiments using pulse-current shooting were conducted to investigate the thermal quench be-havior and thermal stabilities of two HTS coils co-wound by pol-yimide or MIT materials against a large overcurrent pulse. The experimental results of the two insulation materials were com-pared to verify the superior thermal performance of the MIT material as the turn-to-turn insulation. Further, the applicability of the MIT material on a 2G HTS magnet system was discussed according to the experimental results.
Funding Information
  • Human Resources Program in Energy Technology
  • Korea Institute of Energy Technology Evaluation and Planning
  • Ministry of Trade, Industry & Energy
  • National Research Foundation of Korea
  • Korea Government, Republic of Korea (20164030201230, 2016R1A2B4007324)

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