On the criteria guiding the design of the upper electron-cyclotron launcher for ITER

Electron cyclotron waves injected from an antenna located in the upper part of the vessel will be employed in ITER to control MHD instabilities, particularly neoclassical tearingmodes (NTMs). The derivation of the NTM stabilization criteria used up to now to guide the optimization of the launcher is reviewed in this paper and their range of validity elucidated. Possible effects leading to a deterioration of the predicted performance through a broadening of the EC deposition profile are discussed. The most detrimental effect will likely be the scattering of the EC beams from density fluctuations, resulting in a beam broadening in the 100% range. The combined impact of these effects with that of beam misalignment (with respect to the targeted surface) is discussed for a time slice of the standard Q = 10 H-mode scenario.

Kubo, S
Published in:
Ec18 - 18Th Joint Workshop On Electron Cyclotron Emission And Electron Cyclotron Resonance Heating, 87, 01008
Presented at:
18th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating (EC), Nara, JAPAN, APR 22-25, 2014
Cedex A, E D P Sciences

 Record created 2015-09-28, last modified 2018-09-13

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