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Effects of radial electric fields on linear ITG instabilities in W7-X and LHD

J Riemann, R Kleiber, M Borchardt2016年Plasma Physics and Controlled FusionIF 2.2出版社

The impact of radial electric fields on the properties of linear ion-temperature-gradient (ITG) modes in stellarators is studied. Numerical simulations have been carried out with the global particle-in-cell (PIC) code EUTERPE, modelling the behaviour of ITG modes in Wendelstein 7-X and an LHD-like configuration. In general, radial electric fields seem to lead to a reduction of ITG instability growth, which can be related to the action of an induced -drift. Focus is set on the modification of mode properties (frequencies, power spectrum, spatial structure and localization) to understand the observed growth rates as the result of competing stabilizing mechanisms.

日本語訳

恒星における線形イオンテンペラチャーグラディエント(ITG)モードの特性に対する径方向電場の影響を研究した。全球粒子インセル(PIC)コードであるEUTERPEを用いた数値シミュレーションを実施し、Wendelstein 7-XおよびLHD類似配位におけるITGモードの挙動をモデル化した。一般に、径方向電場はITG不安定性の成長を低減させるように作用し、これは誘起されたドリフトの効果に関連づけられる。観測された成長率を、競合する安定化メカニズムの結果として理解するため、モード特性(周波数、パワースペクトル、空間構造、局在性)の変化に焦点を当てた。

装置

lhd高精度(タイトル一致)wendelstein-7x高精度(タイトル一致)

wiki

LHDW7-XRadial electric fieldIon temperature gradient
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