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Line radiation in the visible and in the ultraviolet in TFR tokamak plasmas

EQUIPE TFR1975年被引用 116Nuclear FusionIF 3出版社

Line radiation in the vísible and ultraviolet (100–1300 Å) spectral regions has been studied on TFR for a 140-kA, 26-kG plasma. The emission is integrated along the line of sight, except for neutral-deuterium visible radiation, which has been spatially resolved. From the measured absolute signals, the initial (in the first ten milliseconds) amount of impurities has been determined. Subsequently, the observed signals can be interpreted in terms of an impurity-recycling flux. It has been deduced from power balance considerations that this flux is confined to an external plasma shell, a small part only diffusing towards the centre to account for the independently inferred Zeff. The power radiated by the observed lines corresponds to an important fraction of the injected Ohmic power (∼ 30-40%). Two lines ascribed to Mo XXXI and Mo XXXII (and therefore originating in the central hot plasma core) have been detected for electron temperatures greater than 1.5 keV.

日本語訳

可視および紫外スペクトル領域(100–1300 Å)における放射が、140 kA、26 kGのTFR装置上で研究された。放射は視線に沿って積分されて測定されたが、中性重水素の可視放射のみは空間分解された。測定された絶対信号から、最初の10ミリ秒間における不純物の初期量が決定された。その後、観測された信号は不純物リサイクリング束の観点から解釈することができる。パワーバランスの考察から、この束は外部プラズマシェルに閉じ込められており、中心部へ拡散するのはごく一部であり、独立に推定されたZeffを説明することが deduced された。観測された輝線による放射パワーは、投入されたオーミックパワーの重要な割合(約30〜40%)を占める。Mo XXXIおよびMo XXXIIに帰属される2本の輝線は、電子温度が1.5 keVを超える中心高温プラズマ領域からのみ検出された。

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