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Modelling of the pellet cloud evolution and mass deposition with an account of ∇B induced drift

I.Yu. Senichenkov, I.Yu. Veselova, V.A. Rozhansky, R. Schneider2006年被引用 12Nuclear FusionIF 3出版社

Modelling of the pellet ablation cloud evolution including the ∇B induced drift motion is performed. The model includes cloud heating, expansion and ionization, acceleration in the low-field side (LFS) direction, Alfven conductivity of the background plasma, compensation of ∇B currents in different parts of the cloud during its propagation along the magnetic field, cooling of the background plasma and simulation of the pellet ablation rate in a self-consistent manner. The time evolution of cloud density and temperature profiles and the mass deposition after the pellet injection are calculated. The LFS and high-field side injection scenarios with plasma and pellet parameters typical for the ASDEX-Upgrade tokamak are compared. An effect of pre-cooling on the pellet penetration depth is studied. The calculated size of the neutral part of the cloud, the characteristic values of cloud density and temperature far from the pellet and the fuelling efficiency (for LFS pellets) are in reasonable agreement with those observed in experiments on the ASDEX-Upgrade.

日本語訳

ペレットアブレーション雲の時間発展のモデル化を、∇B誘起ドリフト運動を含めて行う。このモデルには、雲の加熱、膨張、電離、低磁場側(LFS)方向への加速、背景プラズマのアルヴェーン導電率、磁場に沿った伝播中の雲の異なる部分における∇B電流の補償、背景プラズマの冷却、およびペレットアブレーション率の自己無撞着なシミュレーションが含まれる。ペレット入射後の雲の密度・温度分布の時間発展と質量堆積を計算する。ASDEX-Upgradeトカマクに典型的なプラズマおよびペレットパラメータを用いた低磁場側および高磁場側入射シナリオを比較する。予冷却がペレット侵入深さに及ぼす影響を調べる。雲の中性部分の計算されたサイズ、ペレットから遠方での雲の密度・温度の特性値、および(LFSペレットに対する)燃料補給効率は、ASDEX-Upgradeでの実験で観測された値と合理的に一致する。

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asdex-upgrade低精度(概要文一致)
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