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Simulating the effect of poloidal particle source on the bootstrap current and benchmarking to analytic estimates in tokamak edge pedestal

T P Kiviniemi, A J Virtanen, H Systä, L Chôné, S Leerink, E Hirvijoki2021年Plasma Physics and Controlled FusionIF 2.2出版社

The bootstrap current profile in the tokamak pedestal is studied numerically using the plasma code ELMFIRE in neoclassical simulations with Joint European Torus-like parameters. The effect of a poloidally localized atom source on the bootstrap current is investigated while assuming that the ionization takes place in the pedestal region. A clear effect of poloidal source location is found within one poloidal Larmor radius for thermal particles. For cold particles, this poloidal dependence largely disappears. Without source, the simulated bootstrap current is compared to two different analytical estimates and their accuracy is tested in terms of gradient scale lengths and collisionality.

日本語訳

トカマク台座部におけるブートストラップ電流分布を、JET(Joint European Torus)類似パラメータを用いた新古典シミュレーションにおいて、プラズマコードELMFIREを用いて数値的に研究した。ポロイダル方向に局在した原子源がブートストラップ電流に及ぼす影響を、電離が台座領域で生じると仮定して調査した。熱粒子については、ポロイダル方向の源位置の明確な影響が1ポロイダル・ラーマー半径以内で見られた。冷たい粒子については、このポロイダル方向依存性はほぼ消失した。源がない場合、シミュレーションされたブートストラップ電流は2つの異なる解析的推定値と比較され、その精度は勾配長と衝突度の観点から検証された。

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jet中精度(概要文一致)

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PedestalBootstrap current
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