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Numerical modelling of high density JET divertor plasma with the SOLPS4.2 (B2-EIRENE) code

V Kotov, D Reiter, R A Pitts, S Jachmich, A Huber, D P Coster, JET-EFDA contributors2008年Plasma Physics and Controlled FusionIF 2.2出版社

SOLPS 4.2 is a version of the B2-EIRENE code which is currently used for predictive modelling studies of the ITER divertor design. This paper presents the results of calculations made for a series of high density shots at JET employing exactly the same physics model as that used for the ITER application. A complete as possible comparison with experimental data has been performed and relatively good agreement (within a factor 2) has been found for the outer divertor (with the exception of the temperature profile). At the inner divertor agreement is worse, particularly at the highest density.The sensitivity of the numerical solution to refinements in the recycling model has been explored. An important finding is that an improved molecular kinetics model (including elastic collisions between molecules and ions) can significantly affect the results. The influence of non-linear effects (neutral–neutral collisions and line radiation opacity) is found to be weak in the discharges studied even at the highest density, in contrast to ITER simulations with the same model.

日本語訳

SOLPS 4.2は、ITERダイバータ設計の予測モデリングに現在使用されているB2-EIRENEコードの一バージョンである。本論文では、ITER適用に使用されたものとまったく同じ物理モデルを採用して、JETにおける一連の高密度放電に対して実施された計算結果を提示する。実験データとの可能な限り完全な比較が行われ、外部ダイバータについては比較的良好な一致(2倍以内)が得られた(温度プロファイルを除く)。内部ダイバータでは、特に最高密度において一致はより悪い。リサイクリングモデルの改良に対する数値解の感度が調査された。重要な発見として、改良された分子動力学モデル(分子とイオン間の弾性衝突を含む)が結果に有意に影響を及ぼし得ることが示された。非線形効果(中性子間衝突および線放射不透明度)の影響は、同じモデルを用いたITERシミュレーションとは対照的に、調査された放電においては最高密度であっても弱いことが見出された。

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jet高精度(タイトル一致)iter中精度(概要文一致)

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JETDivertorDivertor plasma
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