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Experimental and theoretical evaluation of the He II 6560.1 Å linecontribution to the deuterium Dα spectral line shape in Tore SupraErgodic Divertor plasmas

R Guirlet, M Koubiti, A Escarguel, C De Michelis, M Mattioli, M OMullane, H Capes, L Godbert-Mouret, R Stamm2001年Plasma Physics and Controlled FusionIF 2.2出版社

The spectral profile of the deuterium Dα line (a commondiagnostic of recycling particles in present tokamaks), emitted in front of anequatorial neutralizer plate in Ergodic Divertor Tore Supra plasmas, shows, inthe presence of large helium contents, some features which have beeninterpreted as the contribution of the near-by hydrogen-like helium Brβ line intensity. In order to validate this interpretation, theintensities of several other He II lines have been measured, and theirratios compared to theoretical values calculated from a collisional-radiativemodel. These data have been used to estimate the brightness of the He IIBrβ line. Although the effect of the He II Brβline intensity on the Dα line profile shape is evaluated (andmeasured) to be non-negligible in these ad hoc plasmas (having a largehelium content), it is concluded that it should be of no influence in usualfusion plasmas.

日本語訳

重水素Dα線のスペクトルプロファイル(現在のトカマクにおけるリサイクリング粒子の一般的な診断手段)は、エルゴディックダイバータTore Supraプラズマの赤道面ニュートラライザープレートの前方で放出されるが、大きなヘリウム含有量が存在する場合、近接する水素様ヘリウムBrβ線の寄与として解釈されてきたいくつかの特徴を示す。この解釈を検証するため、いくつかの他のHe II線の強度が測定され、その強度比が衝突-放射モデルから計算された理論値と比較された。これらのデータを用いて、He II Brβ線の輝度が推定された。He II Brβ線の強度がDα線のプロファイル形状に及ぼす影響は、これらのアドホックな(大きなヘリウム含有量を持つ)プラズマにおいて無視できないものとして評価(および測定)されたが、通常の核融合プラズマにおいては影響を及ぼさないと結論付けられた。

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DivertorDeuteriumTore SupraDivertor plasmaErgodic divertor
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