R&D activities on RF contacts for the ITER ion cyclotron resonance heating launcher - Archive ouverte HAL Access content directly
Journal Articles Fusion Engineering and Design Year : 2015

R&D activities on RF contacts for the ITER ion cyclotron resonance heating launcher

(1) , (1) , (2) , (3) , (1) , (1) , (4) , (3) , (1) , (2) , (2) , (1) , (1) , (1) , (1) , (1) , (1) , (1) , (1) , (1) , (1) , (1) , (1) , (1) , (1) , (1)
1
2
3
4

Abstract

Embedded RF contacts are integrated within the ITER ICRH launcher to allow assembling, sliding and to lower the thermo-mechanical stress. They have to withstand a peak RF current up to 2.5 kA at 55 MHz in steady-state conditions, in the vacuum environment of themachine.The contacts have to sustain a temperature up to 250°Cduring several days in baking operations and have to be reliable during the whole life of the launcher without degradation. The RF contacts are critical components for the launcher performance and intensive R&D is therefore required, since no RF contactshave so far been qualified at these specifications. In order to test and validate the anticipated RF contacts in operational conditions, CEA has prepared a test platform consisting of a steady-state vacuum pumped RF resonator. In collaboration with ITER Organization and the CYCLE consortium (CYclotronCLuster for Europe), an R&D program has been conducted to develop RF contacts that meet the ITER ICRH launcher specifications. A design proposed by CYCLE consortium, using brazed lamellas supported by a spring to improve thermal exchange efficiency while guaranteeing high contact force, was tested successfully in the T-resonator up to 1.7 kA during 1200 s, but failed for larger current values due to a degradation of the contacts. Details concerning the manufacturing of the brazed contacts on its titanium holder, the RF tests results performed on the resonator and the non-destructive tests analysis of the contacts are given in this paper.
Fichier principal
Vignette du fichier
SOFT2014_Hillairet_RF-Contacts_V5.pdf (459.21 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

cea-01144581 , version 1 (22-04-2015)

Identifiers

Cite

Julien Hillairet, Arnaud Argouarch, Rob Bamber, Bertrand Beaumont, Jean-Michel Bernard, et al.. R&D activities on RF contacts for the ITER ion cyclotron resonance heating launcher. Fusion Engineering and Design, 2015, Available online 21 April 2015. ⟨10.1016/j.fusengdes.2015.04.005⟩. ⟨cea-01144581⟩
508 View
250 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More