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Comparison of the TEP method for neutral particletransport in the plasma edge with the Monte Carlo method

R. Rubilar, W.M. Stacey, J. Mandrekas2001年被引用 8Nuclear FusionIF 3出版社

The transmission/escape probability (TEP) method for neutralparticle transport has recently been introduced and implemented forthe calculation of 2-D neutral atom transport in the edge plasma anddivertor regions of tokamaks. The results of an evaluation of theaccuracy of the approximations made in the calculation of the basicTEP transport parameters are summarized. Comparisons of the TEP andMonte Carlo calculations for model problems using tokamak experimentalgeometries and for the analysis of measured neutral densities inDIII-D are presented. The TEP calculations are found to agree ratherwell with Monte Carlo results, for the most part, but the need for afew extensions of the basic TEP transport methodology and forinclusion of molecular effects and a better wall reflection model inthe existing code is suggested by the study.

日本語訳

透過/脱出確率(TEP)法による中性粒子輸送が、トカマクの周辺プラズマおよびダイバータ領域における2次元中性原子輸送の計算のために、最近導入され実装された。基本TEP輸送パラメータの計算においてなされた近似の精度評価の結果が要約されている。トカマク実験形状を用いたモデル問題に対するTEP計算とモンテカルロ計算の比較、およびDIII-Dにおける測定された中性粒子密度の解析に基づく比較が提示されている。TEP計算は、概ねモンテカルロ結果とよく一致することが見出されたが、本研究は、基本TEP輸送手法のいくつかの拡張と、分子効果およびより優れた壁反射モデルの既存コードへの組み込みの必要性を示唆している。

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