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An extreme ultraviolet study of the 2XIIB neutral-beam-heated mirror machine

R.P. Drake, H.W. Moos1980年被引用 10Nuclear FusionIF 3出版社

The extreme ultraviolet emissions from the 2XIIB neutral-beam-heated mirror machine were studied with 0.4-m normal-incidence spectrometer. The absolute brightnesses of resonance lines between 400 and 1600 Å were measured and spatial and spectral scans of some lines were performed. The oxygen concentration was 3%, and the source of the oxygen was shown to be the neutral beams. The concentrations of titanium, carbon and nitrogen were roughly 0.4%. The power radiated by these impurities was a small percentage of the power deposited by the neutral beams. Radial and axial injections of neon showed that impurities introduced by radial fluxes of gas are poorly confined and that the beam-fuelled plasma inhibits the penetration of impurities along field lines. The large density of beam-injected neutrals caused charge-exchange recombination processes to strongly affect the populations of the oxygen ionization states; also, the presence of oxygen affected the plasma power balance through charge exchange.

日本語訳

2XIIB中性粒子ビーム加熱ミラー装置からの極端紫外放射を、0.4m垂直入射分光器を用いて研究した。400〜1600Åの共鳴線の絶対輝度を測定し、いくつかの線の空間走査およびスペクトル走査を行った。酸素濃度は3%であり、酸素の供給源は中性ビームであることが示された。チタン、炭素、窒素の濃度はおよそ0.4%であった。これらの不純物による放射損失は、中性ビームによって供給されるパワーのわずかな割合であった。動径方向および軸方向へのネオン注入により、動径方向のガス流によって導入された不純物は閉じ込めが弱く、ビーム加熱プラズマは軸方向のガス流による不純物の侵入を抑制することが示された。ビーム注入による中性粒子の高密度により、電荷交換再結合過程が酸素の電離状態の分布に強く影響を及ぼした。また、酸素の存在は電荷交換を介してプラズマのパワーバランスに影響を与えた。

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