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Measurement of helium lines in the edge plasma of the JIPP T-IIU tokamak

K Iwasaki, J Koog, K Sato, H Kuramoto1997年Fusion Engineering and DesignIF 1.7出版社

AbstractUV-visible spectra of neutral and low-ionized impurities are observed in the edge plasma of the JIPP T-IIU tokamak. To study recombination processes, helium was introduced into the deuterium plasma as a trace element. The line intensities of He I from the n = 3, 4, 5 levels were compared with a calculation of the collisional radiative (CR) model. The line intensity distributions were deviated from the CR model, particularly for the lines from n = 3. It seems that the double charge transfer process is one of the dominant recombination processes for He in the edge plasma.

日本語訳

アブストラクトJIPP T-IIUトカマクの周辺プラズマにおいて、中性および低電離不純物の紫外可視スペクトルが観測される。再結合過程を研究するため、重水素プラズマ中にヘリウムをトレース元素として導入した。n = 3、4、5準位からのHe Iの線強度を、衝突放射(CR)モデルの計算と比較した。線強度分布はCRモデルからずれており、特にn = 3からの線で顕著であった。周辺プラズマ中のHeの主要な再結合過程の一つは、二重電荷移動過程であると思われる。

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HeliumEdge plasmaJIPPT-IIU
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