visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-06-14 15:00 
연사  
장소 #1323 (E6-2 1st fl.) 

No-Insulation High Temperature Superconductor Magnet Technology for Compact, Reliable, and Low-Cost High Field DC Magnets

 

June 14, 2016 (Tue) 3PM , #1323 (E6-2 1st fl.)
Prof. Seungyong Hahn, Florida State University


Abstract:


Firstly introduced in 2010, the No-Insulation (NI) high temperature superconductor (HTS) winding technique is expected to provide a practical solution for protection of HTS magnets, one of the most critical challenges in high-field (>20-T) HTS magnets. The key idea is to eliminate turn-to-turn insulation within an HTS coil and, in a quench event, current can be automatically diverted to the adjacent turns through turn-to-turn shorts. As a result, an NI magnet can be designed at a substantially higher operating current density than that of its insulated counterpart, thus the magnet becomes extremely compact, yet “self-protecting.” To date, over 100 NI HTS coils have been constructed and tested to have successfully demonstrated the self-protecting feature of NI coils. In a magnet level, a total of 9 NI magnets have been designed, constructed, and tested, including the recent 26-T 35-mm all-REBCO magnet that was designed by Hahn and constructed by SuNAM. To date, all of NI magnets survived after multiple consecutive quenches at their nominal operating temperature ranged 4.2 – 20 K. An NI magnet, however, has a major drawback of “charging delay” due to its turn-to-turn shorts. Several variations of the NI technique, including the Partial-No-Insulation (PNI) and the Metallic-Cladding-Insulation (MCI), are proposed by several groups, with which 5 – 50 times reduced charging delays were reported than those of their NI counterparts. This presentation provides a summary of the NI magnet technologies, relevant to design and construction of axion detection magnets, for the past 5 years, which include: 1) recent quench test results of two all-REBCO magnets, 26-T/35-mm and 7-T/78-mm; 2) a 9 T REBCO insert that reached a record high field of 40 T in a background field of 31 T; 3) “electromagnetic quench propagation” as the self-protecting mechanism of an NI magnet; 4) potential of the NI technique for the next-generation ultra high field magnets; 5) major challenges and potential pitfalls. 


Contact: CAPP Administration Office(T.8166)

번호 날짜 연사 제목
공지 2025-02-24 16:00    2025년 봄학기 콜로키움 안내
공지 2025-02-27 16:00    2025년 봄 물리학과 특별세미나 (광학/응집물리 분야)
525 2022-11-17 16:00    (광학분야 세미나) Ultrastructural and Spectroscopic Studies by Super-Resolution Fluorescence Microscopy
524 2022-09-22 16:00    (광학분야 세미나) Quasi-particle-like optical vortices in magnetic materials
523 2022-02-28 16:00    Spin-based training of optical microscopes
522 2022-12-09 11:00    [Update 세미나영상](응집물리 세미나) Single-shot measurements of strongly-correlated artificial molecular levels in semiconductor quantum dots file
521 2025-02-27 16:00  김도헌 교수(서울대)  Toward reliably coherent spin qubits in silicon file
520 2025-03-27 16:00  김건우 교수 (중앙대)  Quantum dynamics in synthetic spaces file
519 2023-03-24 11:00    (응집물리 세미나)Floquet simulators of topological surface states in isolation
518 2023-05-18 16:00    (광학분야 세미나)Dielectric metasurfaces for optimized optical system and spatial light modulators
517 2022-05-10 16:00    (광학분야 특별세미나)Testing quantum thermodynamics using quantum optics
516 2022-05-30 16:00    Light manipulation using 2D layered semiconductors
515 2025-03-13 16:00  고희동 교수(서울대)  분산관계 기반 파동 제어 구조물 설계 file
514 2022-09-29 16:00    (광학분야 세미나) Ultrafast THz Field-Induced Nonlinear Optics
513 2013-03-11 16:00    Physics Colloquium : 2013 Spring
512 2025-03-17 16:00  강동민 교수 (서울대)  String Theory, Quantum Field Theory and Physical Mathematics file
511 2023-05-31 16:00    [High-Energy Theory Seminar] Resurgence and complex Chern-Simons theory
510 2022-01-18 14:00    Data-driven interrogation of biological dynamics: from subcellular interactions to neuronal networks in vivo file
509 2024-10-02 12:00    Data-driven discovery of neural computations through brain-wide and cell-type-specific dynamical systems file
508 2016-06-14 16:00    Photonic quantum network based on multimode squeezed vacuums and single-photon subtraction
507 2023-05-17 14:00    Optical Response in the multilayer thin films
506 2021-02-15 17:00    Magnetic Cluster Octupole Domain evolutation in chiral antiferromagnets file