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Improved GAMMA 10 tandem mirror confinement in high density plasma

K. Yatsu, T. Cho, H. Higaki, M. Hirata, H. Hojo, M. Ichimura, K. Ishii, Y. Ishimoto, A. Itakura, I. Katanuma2003年被引用 10Nuclear FusionIF 3出版社

GAMMA 10 experiments have advanced in high density experiments after the last IAEA fusion energy conference in 2000 where we reported the production of the high density plasma through use of ion cyclotron range of frequency heating at a high harmonic frequency and neutral beam injection in the anchor cells. However, the diamagnetic signal of the plasma decreased when electron cyclotron resonance heating was applied for the potential formation. Recently a high density plasma has been obtained without degradation of the diamagnetic signal and with much improved reproducibility than before. The high density plasma was attained through adjustment of the spacing of the conducting plates installed in the anchor transition regions. The potential confinement of the plasma has been extensively studied. Dependences of the ion confinement time, ion-energy confinement time and plasma confining potential on plasma density were obtained for the first time in the high density region up to a density of 4×1018 m−3.

日本語訳

GAMMA 10実験は、前回のIAEA核融合会議(2000年)において、アンカーセルでの高調波イオンサイクロトロン周波数帯加熱と中性粒子ビーム入射による高密度プラズマの生成を報告して以来、高密度実験において進展を遂げている。しかしながら、電位形成のための電子サイクロトロン共鳴加熱を適用した際には、反磁性信号が減少した。最近では、アンカー遷移領域に設置された導体板の間隔を調整することにより、反磁性信号の低下を伴わず、かつ再現性が大幅に向上した高密度プラズマが得られている。プラズマの電位閉じ込めについても広範に研究が行われた。イオン閉じ込め時間、イオンエネルギー閉じ込め時間、およびプラズマ閉じ込め電位のプラズマ密度依存性が、密度4×10¹⁸ m⁻³までの高密度領域において初めて得られた。

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