Systematic Study of the Contact Resistance Between REBCO Tapes: Pressure Dependence in the Case of No-Insulation, Metal Co-Winding and Metal-Insulation

Article Article scientifique Article Systematic Study of the Contact Resistance Between REBCO Tapes: Pressure Dependence in the Case of No-Insulation, Metal Co-Winding and Metal-Insulation eng 2019 author Bonura Marco 0000-0002-8512-0989 733611 author Barth Christian 811989 author Joudrier Anthony 800059 author Troitino Jose Ferradas author Fete Alexandre 700910 author Senatore Carmine 0000-0002-9191-5016 561307 10.1109/TASC.2019.2893564 1051-8223 https://ieeexplore.ieee.org/document/8613859/ No-insulation and partial-insulation are novel approaches for compact, high field rare-earth-Ba2Cu3O7-x-coated conductor magnets. They maximize the current density and overcome some of the coated conductors' intrinsic challenges such as the low normal zone propagation velocity and the resulting difficulties to quench REBCO magnets safely. However, this comes at a reduction of the field quality and an increase of the charging time. The performance of this type of coils is mainly determined by the contact resistance between the different layers of the winding. In the case of partially-insulated coils, the contact resistance can be adjusted by a tailored choice of the material used for the metal co-winding or for the metallic coating of the REBCO tape. We present here a systematic study of the impact of pressure on the contact resistance in the cases of direct contact (no-insulation) as well as metal co-winding and metal coating (partial-insulation). Different “insulation” metals as well as various “insulation” to REBCO tape ratios are tested at 77 K in self-field varying the contact pressure in the range of 10–200 MPa. The goal is to provide coil manufacturers with the means of achieving a controlled contact resistance to optimize the coil performance. Dewey 500.2 Swiss National Science Foundation Applications of Superconductivity under Extreme Conditions 144673 CH Careers European Commission Accelerator Research and Innovation for European Science and Society 730871 ARIES EU H2020 33 Département de physique de la matière quantique 131 false 679 Groupe Senatore IEEE Transactions on Applied Superconductivity 29 5 74956e3a-0b29-4769-853b-1246ce971962 Article (Published version) Restricted Bonura_contact-resistance_TASC_2019.pdf 910380 application/pdf restrictedAccess Faculté des sciences / Section de physique / Département de physique de la matière quantique

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Systematic Study of the Contact Resistance Between REBCO Tapes: Pressure Dependence in the Case of No-Insulation, Metal Co-Winding and Metal-Insulation	IEEE Transactions on Applied Superconductivity			2019	693	1

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Joudrier, Anthony