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Development and fabrication of helical coils for the large helical device (LHD).

[In Japanese. / En japonais.]

Author(s) : IMAGAWA S.

Type of article: Article

Summary

A pair of helical coils for LHD, the largest pool-cooled superconducting coil system with a magnetic energy of 1.6 gigajoules is described. In order to produce a fine magnetic surface, highly accurate manufacture within more or less 2 mm and small deformation below 3.4 mm against electromagnetic forces at 4 T operation are required. Besides high current density, more than 53 A/mm2 is necessary to keep sufficient distance between the coil and the plasma vacuum vessel. The helical coils are designed to satisfy the cryostable criterion by optimizing the wetted surface fraction of each conductor.

Details

  • Original title: [In Japanese. / En japonais.]
  • Record ID : 1999-0024
  • Languages: Japanese
  • Source: Cryogenics/ Cryog. Eng. - vol. 32 - n. 11
  • Publication date: 1997
  • Document available for consultation in the library of the IIR headquarters only.

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