DocumentCode :
1198014
Title :
Development of hollow cooling monolithic conductor for ITER TF coil
Author :
Sugimoto, M. ; Isono, T. ; Koizumi, N. ; Yoshida, K. ; Takahashi, Y. ; Nishi, M. ; Ando, T. ; Tsuji, H. ; Sekiguchi, T. ; Shimamoto, S. ; Tsukamoto, H. ; Kurumizawa, Y.
Author_Institution :
JAERI, Ibaraki, Japan
Volume :
28
Issue :
1
fYear :
1992
fDate :
1/1/1992 12:00:00 AM
Firstpage :
218
Lastpage :
221
Abstract :
Results of verification tests for the TMC (Test Module Coil)-FF hollow cooling monolithic conductor are presented. With various strands to test the optimal bronze ratio, the critical current of full-scale samples was measured at 13 T and 4.2 K. The maximum critical current density is 404 A/mm2, which is smaller than the requirement of over 500 A/mm2 at 12 T. There is no degradation of the critical current of a full size conductor compared with the same sample before cabling. AC losses of the conductor were measured in parallel and perpendicular fields. The results of the time constant measurements are larger than the calculated values in each direction. The stability margin of the full size conductor is 40 mJ/cc-metal at the nominal point, assuming long length disturbance. This result is estimated from experimental results for a reduced size conductor and from thermal analysis. The heat generation of the joint between Nb3Sn and Nb-Ti is much smaller than that of nuclear heating
Keywords :
Tokamak devices; composite superconductors; critical current density (superconductivity); critical currents; fusion reactor materials; fusion reactor theory and design; magnetic leakage; superconducting cables; superconducting magnets; 13 T; 4.2 K; AC losses; ITER toroidal field coil; Internation Thermonuclear Experimental Reactor; Nb3Sn strands; NbTi strands; TMC-FF conductor; critical current; full-scale samples; heat generation; hollow cooling monolithic conductor; maximum critical current density; optimal bronze ratio; stability margin; time constant measurements; verification tests; Coils; Conductors; Cooling; Critical current; Critical current density; Current measurement; Degradation; Density measurement; Size measurement; Testing;
fLanguage :
English
Journal_Title :
Magnetics, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9464
Type :
jour
DOI :
10.1109/20.119849
Filename :
119849
Link To Document :
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