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29 March 2024
 
  » arxiv » 1306.6778

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Characterisation of local ICRF heat loads on the JET ILW
P. Jacquet ; F. Marcotte ; L. Colas ; G. Arnoux ; V. Bobkov ; Y. Corre ; S. Devaux ; J-L Gardarein ; E. Gauthier ; M. Graham ; E. Lerche ; M-L. Mayoral ; I. Monakhov ; F. Rimini ; A.Sirinelli ; D. Van Eester ; JET EFDA contributors ;
Date 28 Jun 2013
AbstractWhen using Ion Cyclotron Range of Frequency (ICRF) heating, enhanced heat-fluxes are commonly observed on some plasma facing components close to the antennas. Experiments have recently been carried out on JET with the new ITER-Like-Wall (ILW) to characterize the heat flux to the JET ICRF antennas. Using Infra-Red thermography and thermal models of the tiles, heat-fluxes were evaluated from the surface temperature increase during the RF phase of L-mode plasmas. The maximum observed heat-flux intensity was ~ 4.5 MW/m2 when operating with -{pi}/2 current drive strap phasing at power level of 2MW per antenna and with a 4 cm distance between the plasma and the outer limiters. Heat-fluxes are reduced when using dipole strap phasing. The fraction of ICRF power deposited on the antenna limiters or septa was in the range 2-10% for dipole phasing and 10-20% with +/-{pi}/2 phasing.
Source arXiv, 1306.6778
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