Excitation test results on a single inner vertical coil for the Large Helical Device
- K. Takahata
- T. Mito
- A. Nishimura
- S. Yamada
- H. Chikaraishi
- N. Yanagi
- A. Iwamoto
- R. Maekawa
- S. Imagawa
- H. Tamura
- S. Yamaguchi
- S. Satoh
- S. Tanahashi
- K. Yamazaki
- J. Yamamoto
- O. Motojima
- Group EXSIV
- T. Kai
- K. Nakamoto
- T. Yoshida
- Y. Wachi
- M. Ono
Publication date
June 1997
DOI Publisher
Institute of Electrical and Electronics Engineers (IEEE) ISSN
1051-8223 Citation count (estimate)
10Abstract
Excitation experiments on a single inner vertical coil for the Large Helical Device (LHD) were carried out to confirm its performance. The coil is one of the LHD\u27s poloidal field coils and consists of a forced-flow Nb-Ti cable-in-conduit conductor (CICC). After cooldown for 250 hours, the superconducting transition of the whole coil was confirmed. Pressure drops were measured during the cooldown to determine the coil\u27s hydraulic characteristics. Then, the coil was successfully energized up to the specified current, 20.8 kA. In the experiments, heat generation of joints, radial displacement and acoustic emission (AE) were measured
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