Experimental investigation to overcome the ramp-rate limitation of CICC superconducting magnets

Sangkwon Jeong, Seokho Kim, Tae Kuk Ko

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2 Citations (Scopus)


RRL (Ramp-rate limitation) is a phenomenon in which a magnet quenches before it reaches its apparent critical current. This paper is an experimental investigation not about the detailed influence of various parameters on the ramp-rate limitation, but about the general methodology to overcome it. A CICC (Cable-In-Conduit Conductor) superconducting magnet has been made of three-strand NbTi triplet. The magnet produced a maximum 3.6 T/s ramp-rate at the inner most region. The temperature of the supercritical helium coolant was deliberately raised to investigate RRL-related quench. The main purpose of the experiment was to study RRL phenomena at the first and consecutive ramp-ups. If quench is avoided during the first ramp-up, the consecutive ramp-ups of the magnet have much higher resistance against the RRL. This paper describes several experimental observations of several an interesting hysteretic characteristics of RRL.

Original languageEnglish
Pages (from-to)1689-1692
Number of pages4
JournalIEEE Transactions on Applied Superconductivity
Issue number1 II
Publication statusPublished - 2001 Mar
Event2000 Applied Superconductivity Conference - Virginia Beach, VA, United States
Duration: 2000 Sept 172000 Sept 22

Bibliographical note

Funding Information:
Manuscript received Septembcr 18, 2000. This work was supported by the KSTAR project under the auspiccs of Ministry of Science and Technology and also partially supported by the Brain Korea 21 project in Korea Sangkwon Jeong and Seokho Kim are with Korea Advanced Institute of Science and Technology, 373-1 Kusong-dong, Yusong-gu, Taejon 305-701, Korea (cmail: skjeongOiiiail.kaist.ac.kr, extter@kaist.ac.kr) ‘l’ae Kuk KO is with Yonsei University, Shinchon-dong 134, Seodaemun-gu. Seoul 120-749, Korea

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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