• HOME
  • >
  • 소식
  • >
  • 세미나
장소 #1323 (E6-2 1st fl.) 
일시 June 14, 2016 (Tue) 3PM 
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


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 일시 장소 연사 제목
공지 Sep.22 2022  E6-1 #1323    2022 가을학기 응집물리 및 광학 세미나 전체 일정
196 Sep10(Tue), 15:00  #2502, E6-2  Jun Ho Son  (2+1) D Duality Web from 3D Euclidean Lattice file
195 Jan. 25th (Tue), 15:00  E6 #1501/online  Junhyun Lee (Rutgers, the State University of New Jersey)  Emulating twisted double bilayer graphene with a multiorbital optical lattice file
194 July 21 - August 2  E6-2,# 5318  Junmou Chen/Thomas Flacke/Kaoru Hagiwara/Junichi Kanzaki/Chris Kelso/Jeong Han Kim/Kyoungchul Kong/Gabriel Lee/Hye-Sung Lee/Ian Lewis  Challenges and Opportunities in Theoretical Particle Physics 2019 file
193 August. 6th (TUE), 14:00  E6 Room(#1323)  Kanghyun Chu  Visualization of in-plane piezoresponse vector fields file
192 2012/02/13-05/14  E6, 1501  Kenji Ohmori (Photo-Molecular Science, IMS)  Physics Colloquium : 2012 Spring
191 Jun 1 (Wed) 4 PM  #1323(E6-2 1st fl.)  Kil-Byoung Chai, Caltech  Laboratory experiments relevant to mesospheric clouds, Saturn’s rings & astrophysical jets
190 Jul 3rd, 2019 (Wed)  E6-2, 2501  Kyung Soo Choi  Many-body quantum electrodynamis (QED) with atoms and photons: A new platform for quantum optics" file
189 July 26, 2018 at 14:00  Room 5318, KAIST Natural Sciences Lecture Hall(E6).  Manki Kim (Department of Physics, Cornell University)  Inflation in String Theory and Backreaction file
188 Aug, 25(Tue), 20:00~  Zoom webinar  Mark D. Stiles (NIST, USA)  KAIST Global Forum for Spin and Beyond (Second Forum) file
187 Aug. 17(Mon), 20:00~  Zoom webinar  Mark D. Stiles (NIST, USA)  Using magnetic tunnel junctions to compute like the brain file
186 January 23, 2019  Rm. C303, Creation Hall (3F), Munji Campus  Mikko Mottonen  Ultrasensitive Microwave Bolometer: Opportunity for Axion Detectors file
185 Apr. 13(Wed.) 10:30Am  E6 #1323/zoom  Mingu Kang (Max Planck POSTECH Korea Research Initiative)  Harnessing topology and correlations from singularities in 3d-kagome metals
184 Dec. 11 (Fri.), 02:30 PM  online  Myung Hwa Jung(Sogang Univ.)  Antisymmetric interlayer exchange coupling in magnetic multilayers
183 Nov.26(Thu), 04:00PM  Online(Zoom)  Myung-Ki Kim  2020 가을학기 광학분야 특별세미나(Light Engineering Beyond the Diffraction Limit)
182 Oct. 17th (Mon) 11:00 AM  #1323,(E6-2, 1st fl.)  Nguyen Quang Liem, Institute of Materials Science, VAST, Viettnam  IMS and examples of the studies on optoelectronic materials
181 8/19 (Mon), 10:00~11:30, 8/22 (Thur), 10:00~11:30  Rm. 1322, E6-2  Nicolas Treps  Tutorials on Multimode Quantum Optics in the Continuous Variable Regime file
180 Sep. 21(Wed.) 10:30~12:00  E6-1 #1501  Pablo Jarillo-Herrero(Department of Physics, MIT)  Distinguished Lecture 'The Magic of Moiré Quantum Matter' file
179 Aug. 8th (Mon), 14:00  E6-2 #2502  Prof. Soonwon Choi(MIT)  Classical Shadow Tomography for Analog Quantum Simulators
178 Dec.9(Wed), 10:00AM  Zoom  Prof. Andrew Geraci (Northwestern University)  Searching for the QCD axion with the ARIADNE experiment file
177 2019. 8. 22 4PM & 8. 23 3PM  #1323, E6-2  Prof. Andrew N Cleland  Physics and Applications in Nanoelectronics and Nonomechanics file