Repairing and upgrading of the HTS insert in the 18T cryogen-free superconducting magnet

S. Awaji, Hidetoshi Oguro, K. Watanabe, S. Hanai, S. Ioka, H. Miyazaki, M. Daibo, Y. Iijima, T. Saito, M. Itoh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Citations (Scopus)

Abstract

Since the development of the 18T cryogen-free superconducting magnet (18T-CSM) at the High Field Laboratory for Superconducting Materials (HFLSM), IMR, Tohoku University, it has been routinely utilized for the various high field researches such as the in-field materials processing and so on. After the Great East Japan Disaster, however, the 18T-CSM is under the repairing due to the serious damages of the system. At this time, a part of the middle Nb 3 Sn section coil and the Bi2223 inner most coil were renewed. The bronze-route Nb 3 Sn coil with a low ac-loss was adopted instead of the previous internal-Sn Nb 3 Sn coil for the reduction of the heat-generation during a field ramping. The new Bi2223 coil will generate the central field of 4.5 T under the background field of 15.5 T by the LTS outer coils, although the previous Bi2223 coil generated 2.5 T. Hence the 18T-CSM was successfully upgraded to the 20T-CSM. In addition to the Bi2223 insert, the Gd123 insert coil is being constructed as well. When the Gd123 insert coil is installed instead of the Bi2223 coil, it will be upgraded to the 22T-CSM from the 20T-CSM.

Original languageEnglish
Title of host publicationAdvances in Cryogenic Engineering - Transactions of the Cryogenic Engineering Conference - CEC, Volume 59
EditorsSusan Breon, Jennifer Marquardt, Thomas Peterson, Michael DiPirro, John Pfotenhauer, Jonathan Demko, James Fesmire, Arkadiy Klebaner, Sidney Yuan, Al Zeller, Peter Kittel, Gregory Nellis, Mark Zagarola
PublisherAmerican Institute of Physics Inc.
Pages732-738
Number of pages7
ISBN (Electronic)9780735412019
DOIs
Publication statusPublished - 2014 Jan 1
Event2013 Joint Cryogenic Engineering and International Cryogenic Materials Conferences, CEC/ICMC 2013 - Anchorage, United States
Duration: 2013 Jun 172013 Jun 21

Publication series

NameAIP Conference Proceedings
Volume1573
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference2013 Joint Cryogenic Engineering and International Cryogenic Materials Conferences, CEC/ICMC 2013
CountryUnited States
CityAnchorage
Period13/6/1713/6/21

Keywords

  • Critical current
  • Cryogen-free superconducting magnet
  • High temperature superconductor
  • Mechanical stress

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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