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Sawtooth pacing with on-axis ICRH modulation in JET-ILW

E. Lerche, M. Lennholm, I.S. Carvalho, P. Dumortier, F. Durodie, D. Van Eester, J. Graves, P. Jacquet, A. Murari, JET Contributors2017年被引用 23Nuclear FusionIF 3出版社

A novel technique for sawteeth control in tokamak plasmas using ion-cyclotron resonance heating (ICRH) has been developed in the JET-ILW tokamak. Unlike previous ICRH methods, that explored the destabilization of the internal kink mode when the radio-frequency (RF) wave absorption was placed near the q  =  1 surface, the technique presented here consists of stabilizing the sawteeth as fast as possible by applying the ICRH power centrally and subsequently induce a sawtooth crash by switching it off at the appropriate instant. The validation of this method in JET-ILW L-mode discharges, including preliminary tests in H-mode plasmas, is presented.

日本語訳

トカマクプラズマにおける鋸歯状振動制御のための新しい手法が、JET-ILWトカマクにおいてイオンサイクロトロン共鳴加熱(ICRH)を用いて開発された。従来のICRH手法が、q = 1 表面付近での無線周波数(RF)波の吸収によって内部キンクモードの不安定化を探求していたのに対し、ここで提示する手法は、ICRHパワーを中心部に印加して鋸歯状振動を可能な限り迅速に安定化し、その後適切な時点でスイッチを切ることによって鋸歯状振動のクラッシュを誘発するものである。JET-ILWにおけるLモード放電での本手法の検証結果と、Hモードプラズマでの予備的試験結果を示す。

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jet高精度(タイトル一致)

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JETIon cyclotron heatingSawtooth oscillation
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