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Title: Qualification of the U.S. Conductors for ITER TF Magnet System

Abstract

The U.S. Domestic Agency is one of the six suppliers of the toroidal field (TF) conductor for ITER. Here, to qualify conductors per ITER requirements, we prepared or provided to the Swiss Plasma Center (SPC) eight test articles, sixteen conductors total, that were tested in the SULTAN facility at SPC in the ITER relevant conditions. The strands that were used in these SULTAN samples were fully characterized in the laboratories. In this paper, we report both test results and analysis of the conductors' performance against expected strand performance. The U.S. TF conductors showed a slightly better than average current sharing temperature and a relatively low sensitivity to warm up-cooldown cycles in comparison with other suppliers' conductors. However, the trend in current sharing temperature versus cycles and warm ups did not saturate, which means a continuing slow degradation of the conductor performance if the number of warm up and cooldown cycles will be significantly higher than expected. Lastly, the ac losses in the U.S. TF conductors are in line with losses in the other TF conductor suppliers.

Authors:
ORCiD logo [1]; ORCiD logo [2];  [2];  [3]; ORCiD logo [3]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Swiss Plasma Center, PSI, Villigen (Switzerland)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1466205
Grant/Contract Number:  
[AC05-00OR22725; AC52-07NA27344]
Resource Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Plasma Science
Additional Journal Information:
[ Journal Volume: 46; Journal Issue: 5]; Journal ID: ISSN 0093-3813
Publisher:
IEEE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Materials testing; mulitfilamentary superconductors; superconducting magnets; superconducting materials

Citation Formats

Martovetsky, Nicolai N., Reiersen, Wayne T., Murdoch, Graeme R., Bruzzone, Pierluigi, and Stepanov, Boris. Qualification of the U.S. Conductors for ITER TF Magnet System. United States: N. p., 2017. Web. doi:10.1109/tps.2017.2764382.
Martovetsky, Nicolai N., Reiersen, Wayne T., Murdoch, Graeme R., Bruzzone, Pierluigi, & Stepanov, Boris. Qualification of the U.S. Conductors for ITER TF Magnet System. United States. doi:10.1109/tps.2017.2764382.
Martovetsky, Nicolai N., Reiersen, Wayne T., Murdoch, Graeme R., Bruzzone, Pierluigi, and Stepanov, Boris. Mon . "Qualification of the U.S. Conductors for ITER TF Magnet System". United States. doi:10.1109/tps.2017.2764382. https://www.osti.gov/servlets/purl/1466205.
@article{osti_1466205,
title = {Qualification of the U.S. Conductors for ITER TF Magnet System},
author = {Martovetsky, Nicolai N. and Reiersen, Wayne T. and Murdoch, Graeme R. and Bruzzone, Pierluigi and Stepanov, Boris},
abstractNote = {The U.S. Domestic Agency is one of the six suppliers of the toroidal field (TF) conductor for ITER. Here, to qualify conductors per ITER requirements, we prepared or provided to the Swiss Plasma Center (SPC) eight test articles, sixteen conductors total, that were tested in the SULTAN facility at SPC in the ITER relevant conditions. The strands that were used in these SULTAN samples were fully characterized in the laboratories. In this paper, we report both test results and analysis of the conductors' performance against expected strand performance. The U.S. TF conductors showed a slightly better than average current sharing temperature and a relatively low sensitivity to warm up-cooldown cycles in comparison with other suppliers' conductors. However, the trend in current sharing temperature versus cycles and warm ups did not saturate, which means a continuing slow degradation of the conductor performance if the number of warm up and cooldown cycles will be significantly higher than expected. Lastly, the ac losses in the U.S. TF conductors are in line with losses in the other TF conductor suppliers.},
doi = {10.1109/tps.2017.2764382},
journal = {IEEE Transactions on Plasma Science},
number = [5],
volume = [46],
place = {United States},
year = {2017},
month = {10}
}

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