visual
visual

세미나

  • HOME
  • >
  • 소식
  • >
  • 세미나
날짜 2016-06-14 15:00 
일시 June 14, 2016 (Tue) 3PM 
장소 #1323 (E6-2 1st fl.) 
연사 Prof. Seungyong Hahn, Florida State University 

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 장소 제목
261 2018-07-27 15:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Muon g-2 in the 2HDM and MSSM: comprehensive numerical analysis and absolute maxima file
260 2019-07-30 16:00  #1323, E6-2  Dirac fermions and flat bands in correlated kagome metals file
259 2019-07-31 16:00  E6-2, #1323  Features of ballistic superconducting graphene file
258 2019-07-08 14:00  E6, #1322  Ultrabroadband squeezed pulses and their relation to relativity file
257 2018-07-09 14:00  #1323, E6-2  The principles of collective learning file
256 2017-07-14 15:00  #1323 (E6-2. 1st fl.)  Chiral anomaly in disordered Weyl semimetals file
255 2016-06-01 16:00  #1323(E6-2 1st fl.)  Laboratory experiments relevant to mesospheric clouds, Saturn’s rings & astrophysical jets
254 2023-06-22 16:00  E6-2,1323  [High Energy Physics Seminar] The Branes Behind Generalized Symmetry Operators
253 2021-06-22 17:00  Zoom webinar  Spintronics meets Quantum Materials file
252 2019-06-24 11:00  E6-2, #1323  Topological photonic anomalies file
251 2019-06-28 14:00  E6-2, #1322  1st Research-exchange meeting of computational material physics file
250 2021-06-08 10:00  Zoom webinar  Photonic crystal devices for sensing file
249 2018-06-01 11:00  E6-2. 1st fl. #1323  Topological phases in low-dimensional quantum materials file
248 2023-06-01 16:00  E6-2 #1323  (광학분야 세미나)Quantum sensing using a squeezed light from hot Rb vapor
247 2016-06-01 10:30  BK21 Conference Room (#1318, E6-2)  Welcome to Nature Photonics
246 2022-06-10 14:30  E6-2. 1st fl. #1323  Combinatorial strategy for condensed matter physics: study on rare earth hexaborides thin films file
245 2022-06-10 16:00  E6-2. 1st fl. #1323  Fe5GeTe2의 나선형 자성특성과 자기저항의 전류밀도 의존성 연구 file
244 2022-06-10 11:00  Online seminar  Record-quality two-dimensional electron systems file
243 2021-06-11 14:30  Online seminar  Engineering sound waves and vibrations in multi-mode nanomechanical systems file
242 2021-06-11 16:00  Online seminar  Pseudogap in surface-doped black phosphorus file