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In the framework of the International Thermonuclear Experimental Reactor (ITER) R&D program on the qualification of the Nb(3)Sn cable-in-conduit conductor of the Toroidal Field coils, a dedicated action was launched inside the European Fusion Technology Program to better investigate the impact of bending strain on recently developed industrial advanced Nb(3)Sn strands. In order to experience ITER TF Coils relevant mechanical conditions, the Nb(3)Sn strands were jacketed inside a 0.2 mm thick stainless-steel (SS) tube, simulating mechanical influence of the jacked on the cable strands.
In this article we will describe in details the four candidate methods that were investigated for imposing a pure controlled bending strain on the jacketed strands. A common feature of these methods is to react the strand on a heat treatment mandrel and to transfer it onto a test mandrel with a different diameter. As well, two options are possible for the jacket removal at strand ends for connection to the current leads: before or after treatment. The four options are tested to provide an investigation area as large as possible.

Additional information

Authors: ZANI L, Département de Recherches sur la Fusion Contrôlée, Association Euratom-CEA sur la Fusion, CEA Cadarache, Saint-Paul-lez-Durance (FR)
Bibliographic Reference: An oral paper given at: 3rd Workshop on Mechano-Electromagnetic Property of Composite Superconductors Organised by: Asociación Kyoto University, Kyoto (JP) Held at: Kyoto University Clock Tower Centennial Hall, Kyoto (JP)
Availability: Available from Association EURATOM-CEA, Departement de Recherches sur la Fusion Controlee, CEA Cadarache, F-13108 St Paul-Lez-Durance, FranceL%Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail:
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