Résumé
This paper focuses on further study of the Radio-Frequency (RF) power absorption mechanisms responsible for Ion Cyclotron Wall Conditioning (ICWC) discharge ignition and sustainment in fusion machines in the presence of high toroidal magnetic field. The dominant electron collisional, ion collisional and cyclotron absorption mechanisms are analyzed during local (antenna-near) gas breakdown (ω pe < ω ) and over-torus plasma wave excitation (ω pe > ω) phases of RF discharge. Optimization of the absorbed RF power in terms of (i) Ez - field generation (electric field along B T-field lines), (ii) antenna phasing and (iii) waves excitation in plasmas with multi-ion species resulted in a successful performance of the JET ICWC experiments (B T=3.3 f,/=25 MHz) using the standard ICRF A2 antennas in a scenario envisaged at ITER full field (B T=53 T,f=40 MHz) - i.e. with the fundamental ion cyclotron resonance (ICR) of the deuterons, ω = ω cD+, on-axis.
langue originale | Anglais |
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titre | 38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts |
Pages | 1164-1167 |
Nombre de pages | 4 |
état | Publié - 2011 |
Evénement | 38th EPS Conference on Plasma Physics 2011, EPS 2011 - Strasbourg, France Durée: 27 juin 2011 → 1 juil. 2011 |
Série de publications
Nom | 38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts |
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Volume | 35 2 |
Une conférence
Une conférence | 38th EPS Conference on Plasma Physics 2011, EPS 2011 |
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Pays/Territoire | France |
La ville | Strasbourg |
période | 27/06/11 → 1/07/11 |