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Abstract

For NET application, CEA is developing a 40 kA cable in conduit whose fabrication technique is expected to be applicable to both NbTi or Nb(3) Sn strands. To ensure a good overall mechanical behaviour of the cable, the number of cabling stages has been limited to three and no full insulation has been provided between stages. A theoretical approach of losses has been developed, from the basic multifilamentary strand to the last stage, taking into account the complex combined effect of the different twist pitches. Through this evaluation, the contact resistance and the action of stainless steel spacers for the last stage are found to be sufficient to limit a.c. losses to an acceptable level in relation to NET specifications. The theoretical approach has been assessed by several experiments : measurements of a.c. losses on the basic 1.9 mm strand, on triplets and "six around one" subcables in relation to compression, measurements of contact resistances in different cases and evaluation of the action of chrome plating.

Additional information

Authors: CIAZYNSKI D, CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR);DUCHATEAU J L, CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR);TURCK B, CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: Paper presented: Applied Superconductivity Conference, Aspen, Colorado (US), Sept. 24-28, 1990
Availability: Available from (1) as Paper EN 35716 ORA
Record Number: 199011699 / Last updated on: 1994-12-02
Category: PUBLICATION
Original language: en
Available languages: en
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