FusionPapers
図版検索トレンドwiki日本の研究
© 2026 FUSIONPAPERS
About法務情報
トップに戻る

Electric field and transport in W7-AS

M Kick, H Maaßberg, M Anton, J Baldzuhn, M Endler, C Görner, M Hirsch, A Weller, S Zoletnik, the W7-AS Team1999年Plasma Physics and Controlled FusionIF 2.2出版社

At W7-AS, confinement properties are analysed and compared mainly with neoclassical predictions for quite different conditions. Low-density electron cyclotron resonance heating (ECRH) discharges allow access to the very-long-mean-free-path regime for electrons ( up to 6 keV) whereas pure neutral beam injections (NBI) and combined NBI/ECRH discharges at high density ( at ) lead to high performance ( up to 50 ms). Depending on the achieved temperatures, the experimental transport analysis in the plasma core is consistent with the neoclassical predictions. The experimentally observed `electron root' feature with strong is driven by the convective flux of ripple-trapped suprathermal electrons generated by the ECRH absorption. `Optimum' confinement is obtained in discharges with narrow density, but broad temperature profiles with steep gradients in the region of low densities and strong close to the plasma edge. The large radial electric fields, both positive and negative, strongly reduce neoclassical transport. The achieved temperatures, however, are limited by the strong temperature dependence of the neoclassical transport.

日本語訳

W7-ASにおいて、閉じ込め特性は、かなり異なる条件に対して主に新古典理論の予測と解析され比較される。低密度の電子サイクロトロン共鳴加熱(ECRH)放電は、電子の非常に長い平均自由行程の領域( up to 6 keV)へのアクセスを可能にする一方、純粋な中性粒子ビーム入射(NBI)および高密度でのNBI/ECRHの組み合わせ放電( at )は、高性能( up to 50 ms)をもたらす。達成された温度に依存して、プラズマコア内の実験的な輸送解析は新古典理論の予測と一致する。実験的に観測された `electron root' 特徴は、強い を伴い、ECRH吸収によって生成されたリップル捕捉超熱電子の対流フラックスによって駆動される。`Optimum' 閉じ込めは、狭い密度、しかし急峻な勾配を持つ広い温度分布を持つ放電において得られ、低密度および強い の領域でプラズマ端に近い。大きな径方向電場は、正負両方とも、新古典輸送を強く低減する。しかし、達成された温度は、新古典輸送の強い温度依存性によって制限される。

wiki

W7-AS
この論文にはまだAI要約がありません。

関連論文

Investigation of ion and electron heat transport of high-Te ECH heated discharges in the large helical device

2016Plasma Physics and Controlled Fusion

Routes to high-performance operation in Wendelstein 7-X: turbulence suppression with shaping of the density profile

2026Plasma Physics and Controlled Fusion

Investigation of the neoclassical ambipolar electric field in ion-root plasmas on W7-X

2020Nuclear Fusion

Turbulence-reduced high-performance scenarios in Wendelstein 7-X

2024Nuclear Fusion

High-confinement NBI discharges in the W7-AS stellarator

1998Plasma Physics and Controlled Fusion

Enhanced heat confinement in the flexible heliac TJ-II

2002Nuclear Fusion

Isotope effects on transport characteristics of edge and core plasmas heated by neutral beam injection (NBI) in an inward shifted configuration at the Large Helical Device

2024Nuclear Fusion

Confinement properties of L-mode plasmas in ASDEX Upgrade and full-radius predictions of the TGLF transport model

2022Nuclear Fusion

Understanding the density pump-out induced by auxiliary heating in electron heating dominated plasmas on EAST

2026Plasma Physics and Controlled Fusion

Confinement in W7-AS and the role of radial electric field and magnetic shear

1997Plasma Physics and Controlled Fusion