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Evolution and stratification of a plasma cloud surrounding a pellet

V Rozhansky, I Veselova, S Voskoboynikov1995年Plasma Physics and Controlled FusionIF 2.2出版社

The 2D equation system for an ionized ablatant density integrated along the magnetic field lines and for a polarization potential is solved numerically. The pellet is modelled by a plasma source of given intensity and spatial dimensions. The effects of a non-uniform tokamak magnetic field are taken into account. It has been shown that the vertical drift current inside the ionized ablatant produces the polarization that causes the ablatant drift in the direction of a tokamak major radius. The resulting E*B drifts lead to a rather complicated plasma cloud shape resembling a 'mushroom' with two clouds connected by a narrow 'stem'. The 'stem' is unstable and splits into separate striations.

日本語訳

磁力線に沿って積分されたイオン化アブラタント密度と分極ポテンシャルに対する2次元方程式系を数値的に解いた。ペレットは、強度と空間的寸法が与えられたプラズマ源によってモデル化される。非一様なトカマク磁場の効果が考慮されている。イオン化アブラタント内部の垂直ドリフト電流が、トカマクの主半径方向へのアブラタントのドリフトを引き起こす分極を生じることが示された。その結果生じるE×Bドリフトは、細い「ステム」によって接続された2つの雲からなる「キノコ」状に似た、かなり複雑なプラズマ雲形状をもたらす。「ステム」は不安定であり、個別のストライエーションへと分裂する。

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