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Optimization of wetted surface fraction of helical coil for LHD

✍ Scribed by S. Imagawa; N. Yanagi; T. Satow; J. Yamamoto; O. Motojima

Book ID
104110789
Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
399 KB
Volume
34
Category
Article
ISSN
0011-2275

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✦ Synopsis

LHD is a fusion exoerimental device with oool-cooled superconductin~ helical coils. The transverse component of the magnetic field in the helical coils becomes zero near the core ot the coil and becomes higher toward the edge. On the contrary, load per unit length on each discontinuous insulator between the conductors becomes ~be largest at the core region of the coil. By changing wetted surface fraction of the conductors according to the strength of the field, the cryogenic stability of the coil can be enhanced without enlarging the maximum compressive stress on the insulators.

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Cryogenic compressive deformation proper
Cryogenic compressive deformation properties of superconducting coil packs simulated for helical coils on LHD program
✍ Arata Nishimura; Hitoshi Tamura; Toshiyuki Mito; Kazuya Takahata; Nagato Yanagi; πŸ“‚ Article πŸ“… 1992 πŸ› Elsevier Science 🌐 English βš– 266 KB

The electromagnetic force of above i0 MN/m will acts on the helical coils in the Large Helical Device. To investigate the deformation property of the helical coils, the coil pack which consists of 16 superconductors was prepared and the compressive mechanical test was carried out at 4.2 K. Also, the