HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Conference papers

Multi-physics modeling and Au-Ni/Rh coating assessment for ITER ion cyclotron resonance heating radio-frequency sliding contacts

Abstract : ITER is a large scale fusion experimental device under construction in Cadarache (France) intended to prove the viability of fusion as an energy source. Ion Cyclotron Resonance Heating (ICRH) system is one of the three heating systems which will supply total heating power of 20 MW (40-55 MHz) up to one hour of operation. Radio-Frequency (RF) contacts are integrated within the antennas for assembly and operation considerations, which will face extremely harsh service conditions, including neutron irradiation, heavy electrical loads (RF current reaches up to 2 kA with a linear current density of 4.8 kA/m) and high thermal loads. Based on the thermal analysis, the contact resistance is expected to be lower than 7 mΩ to keep the maximum temperature on the louvers lower than 250°C. Few weeks of vacuum (~10$^{-5}$ Pa) baking at 250°C for outgassing is expected before each plasma experimental campaign, under which the RF contact materials' mechanical properties change and diffusion phenomena between different materials are inevitable. CuCrZr and 316L are proper base materials for ITER RF contact louvers and conductors respectively. In order to improve the RF contact's wear and corrosion resistivity as well as to reduce the contact resistance, Au-Ni and Rh functional layers could be electroplated on CuCrZr and 316L accordingly. The application of the Au-Ni/Rh coating pairs is assessed through the thermal ageing and diffusion tests. Wear and electrical contact performances of the Au-Ni/Rh pairs are deeply studied on a dedicated tribometer operated at ITER relevant conditions.
Complete list of metadata

Contributor : Julien Hillairet Connect in order to contact the contributor
Submitted on : Monday, July 30, 2018 - 10:35:42 PM
Last modification on : Tuesday, April 19, 2022 - 3:38:02 PM
Long-term archiving on: : Wednesday, October 31, 2018 - 2:12:53 PM


Chen2017_MultiPhysics modeling...
Files produced by the author(s)



Z. Chen, Julien Hillairet, V. Turq, Y. Song, R. Laloo, et al.. Multi-physics modeling and Au-Ni/Rh coating assessment for ITER ion cyclotron resonance heating radio-frequency sliding contacts. 2017 IEEE Holm Conference on Electrical Contacts, Sep 2017, Denver, United States. ⟨10.1109/HOLM.2017.8088059⟩. ⟨cea-01851802⟩



Record views


Files downloads