Proposals for Cold Testing of the ITER TF Coils
The ITER Toroidal Field (TF) magnet system will be made of 18 coils using Nb3Sn as superconducting material. These coils will operate at a maximum field of 11.8 T for a nominal current of 68 carried by a dual channel cable-in-conduit conductor cooled by a forced flow of supercritical helium at 4.5 K. In each coil, seven 760 m conductor lengths wound in double pancakes will be connected to each other by low resistance joints. As a final step of the reception tests, it is proposed to perform cold tests of these coils at liquid helium temperature after completion of their manufacture. The testing shall include high voltage tests to check the quality of the insulation, leak tests and pressure drop measurements of the hydraulic circuits as well as measurement of joint resistances. Testing the coils up to nominal current is a discussed option, addressing on one hand measurement of the electrical performances in self field and on the other hand the mechanical behaviour of the coils. To perform these tests, a dedicated test facility has to be built, allowing possible simultaneous testing of two coils, assembled together in a twin coil configuration, similarly to their assembly in the torus.
Bibliographic Reference: An oral paper given at: 19th International Conference on Magnet Technology Organised by: INFN Sezione di Genova; Genova (IT) Held at: Congress Centre "Magazzini del Cotone", Genova (IT)
Availability: Available from Association EURATOM-CEA, Département de Recherches sur la Fusion Contrôlée, CEA Cadarache, F-13108 St Paul-Lez-Durance, France Tel: (+33) 4 42 25 70 01; Fax: (+33) 4 42 25 64 21 E-mail: firstname.lastname@example.org
Record Number: 200518352 / Last updated on: 2005-10-04
Original language: en
Available languages: en