DocumentCode :
1445221
Title :
Stability and Quench Test for NbTi CIC Conductor of JT-60SA Equilibrium Field Coil
Author :
Murakami, H. ; Ichige, T. ; Kizu, K. ; Tsuchiya, K. ; Yoshida, K. ; Obana, T. ; Hamaguchi, S. ; Takahata, K. ; Mito, T. ; Imagawa, S.
Author_Institution :
Japan Atomic Energy Agency, Naka, Japan
Volume :
20
Issue :
3
fYear :
2010
fDate :
6/1/2010 12:00:00 AM
Firstpage :
512
Lastpage :
516
Abstract :
The EF coil conductors of JT-60SA are designed with the NbTi cable in conduit conductor because the maximum magnetic field goes up to 6.2 T. The prototype NbTi conductor was developed and tested to confirm the capability of the real conductor. The prototype conductor was proven to have enough Tcs margin under the operating conditions investigated in previous test. In this study, the quench test was operated to measure the stability margin and the normal state propagation. Firstly, the MQE under the Tcs margin of 0.2 K was found to be 80 mJ/cc-strand which is almost the same as that of the previous CIC conductor to result in enough stability margins on EF coil operation. Secondly, the propagation velocity to upstream direction and downstream direction were found to be about 0.47 m/s and 0.54 m/s, respectively. Finally, the quench analysis was conducted to calculate the maximum temperature during quench. The analysis results showed that the maximum temperature reached about 70 K, which is within the permissible value of 150 K for the EF coils.
Keywords :
niobium alloys; quenching (thermal); superconducting coils; superconducting magnets; titanium alloys; JT-60SA equilibrium field coil conductor; NbTi; cable-in-conduit conductor; magnetic field; normal state propagation; prototype conductor; quenching analysis; velocity propagation; CIC conductor; NbTi; quench analysis; stability margin;
fLanguage :
English
Journal_Title :
Applied Superconductivity, IEEE Transactions on
Publisher :
ieee
ISSN :
1051-8223
Type :
jour
DOI :
10.1109/TASC.2010.2040157
Filename :
5433272
Link To Document :
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