@inproceedings{14c287e723d3461a8e9a017147cc0b00,
title = "Repairing and upgrading of the HTS insert in the 18T cryogen-free superconducting magnet",
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. ",
keywords = "Critical current, Cryogen-free superconducting magnet, High temperature superconductor, Mechanical stress",
author = "S. Awaji and Hidetoshi Oguro and K. Watanabe and S. Hanai and S. Ioka and H. Miyazaki and M. Daibo and Y. Iijima and T. Saito and M. Itoh",
year = "2014",
month = jan,
day = "1",
doi = "10.1063/1.4860776",
language = "English",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
pages = "732--738",
editor = "Susan Breon and Jennifer Marquardt and Thomas Peterson and Michael DiPirro and John Pfotenhauer and Jonathan Demko and James Fesmire and Arkadiy Klebaner and Sidney Yuan and Al Zeller and Peter Kittel and Gregory Nellis and Mark Zagarola",
booktitle = "Advances in Cryogenic Engineering - Transactions of the Cryogenic Engineering Conference - CEC, Volume 59",
note = "2013 Joint Cryogenic Engineering and International Cryogenic Materials Conferences, CEC/ICMC 2013 ; Conference date: 17-06-2013 Through 21-06-2013",
}