EPJ Web of Conferences
Volume 87, 2015EC18 - 18th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating
|Number of page(s)||6|
|Published online||12 March 2015|
On the criteria guiding the design of the upper electron-cyclotron launcher for ITER
1 Max-Planck-Institut für Plasmaphysik, Garching, Germany
2 Istituto di Fisica del Plasma CNR, EURATOM-ENEA-CNR Association, Milano, Italy
3 Centre de Recherches en Physique des Plasmas, CRPP-EPFL, Lausanne, Switzerland
4 Fusion for Energy, Barcelona, Spain
5 ITER Organization, Saint-Paul-Lez-Durance, France
Published online: 12 March 2015
Electron cyclotron waves injected from an antenna located in the upper part of the vessel will be employed in ITER to controlMHD 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.
© Owned by the authors, published by EDP Sciences, 2015
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.