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Radiation due to pseudo-continuum from high-Z impurities in upgraded DIVA tokamak plasma

S. Kasai, A. Funahashi, M. Nagami, T. Sugie1979年被引用 8Nuclear FusionIF 3出版社

The many closely crowded lines (pseudo-continuum) of high-Z gold impurities are studied in detail with a calibrated grazing-incidence monochromator in hydrogen plasma, in the upgraded DIVA tokamak device with a divertor; the toroidal field is 20 kG and the peak plasma current is 40 kA. The emission spectrum of the many lines is observed in the wavelength region of 42 to 200 Å. The time-resolved spatial distribution of the emission of the many lines was measured in each element in the wavelength region. It was found that the radiation due to the many lines in the wavelength region of 120 to 200 Å concentrated in an intermediate region of the plasma column, and that the emission of the many lines in the wavelength region of 42–110 Å peaked at the plasma centre. The radiation power loss due to the many lines in the 120–200 Å region was dominant during the whole discharge. The radiation power due to the many lines corresponded to 40–70% of the total radiation power loss from the plasma volume.

日本語訳

高Z金不純物の多数の密集した線(擬似連続スペクトル)を、ダイバータ付き改良DIVAトカマク装置において、較正された斜入射分光器を用いて水素プラズマ中で詳細に研究した。トロイダル磁場は20kG、最大プラズマ電流は40kAである。多数の線の発光スペクトルは、42〜200Åの波長領域で観測された。この波長領域内の各要素において、多数の線の発光の時間分解空間分布を測定した。120〜200Åの波長領域における多数の線による放射は、プラズマ柱の中間領域に集中し、42〜110Åの波長領域における多数の線の発光はプラズマ中心でピークに達することがわかった。120〜200Å領域の多数の線による放射電力損失は、全放電期間を通じて支配的であった。多数の線による放射電力は、プラズマ体積からの全放射電力損失の40〜70%に相当した。

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