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

The time behaviour of radial electric fields at the L-H transition from the observation of ripple-trapped ions

W Herrmann, J A Heikkinen, T Kurki-Suonio, the ASDEX Upgrade Team1998年Plasma Physics and Controlled FusionIF 2.2出版社

The density of ripple-trapped ions is strongly influenced by negative radial electric fields that can compensate the grad B drift. This density can be monitored with a time resolution of about by the measurement of charge-exchange neutral particle fluxes. According to Monte Carlo and Fokker-Planck calculations these fluxes should respond with a time delay of less than , if the halfwidth of the electric field is reasonably large (a few centimetres). In the experiment, rise times of the fluxes after the L-H transition are longer or about 1 ms; jumps of the electric field in much shorter times can be excluded under such circumstances. The same is found for the H-L transition, where the flux measurement does not show any indication for a fast drop of the fields.

日本語訳

リップル捕捉イオンの密度は、grad Bドリフトを補償できる負の径方向電場によって強く影響を受ける。この密度は、荷電交換中性粒子フラックスの測定により、約 の時間分解能で監視することができる。モンテカルロおよびフォッカー・プランク計算によれば、電場の半値幅が合理的に大きい場合(数センチメートル)、これらのフラックスは 未満の時間遅延で応答するはずである。実験では、L-H遷移後のフラックスの立ち上がり時間は1 ms程度以上であり、そのような状況下では、はるかに短い時間での電場のジャンプは除外できる。H-L遷移についても同様のことが見られ、そこではフラックス測定は電場の急速な低下の兆候を何ら示さない。

wiki

Radial electric fieldL-H transition
この論文にはまだAI要約がありません。

関連論文

Zero-dimensional model for the critical condition for the L–H transition in the flux–gradient relation

2014Nuclear Fusion

Flux-surface variations of the electrostatic potential in stellarators: impact on the radial electric field and neoclassical impurity transport

2018Plasma Physics and Controlled Fusion

Ripple-trapped beam ions in the presence of a radial electric field

1998Plasma Physics and Controlled Fusion

A model for the L-H mode transition in Tokamaks

1992Nuclear Fusion

Plasma flux motion in a toroidal plasma guide

1986Plasma Physics and Controlled Fusion

Improvement of ion-temperature-profile determination from charge exchange measurements by inclusion of total-neutral-flux data

1997Plasma Physics and Controlled Fusion

Fast response in the ripple trapped ion distribution to abrupt changes in a radial electric field in tokamaks

1998Nuclear Fusion

Explanation of the L-H mode transition induced by applied voltage

1993Nuclear Fusion

Observation of electromagnetic fluctuation induced particle transport in ETG dominated large laboratory plasma

2019Plasma Physics and Controlled Fusion

Two dimensionally steep structure of the electric field in tokamak H-mode

2008Nuclear Fusion