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Effect of ion loss on ICRF heating

K. Itoh, S.-I. Itoh, A. Fukuyama1988年被引用 6Nuclear FusionIF 3出版社

The effect of spatial loss on ICRF (ion cyclotron range of frequency) wave heating is studied. A simple model for the energy-dependent loss term is adopted in the Fokker-Planck equation. The case of the minority ion heating by fundamental cyclotron resonance is analysed. It is found that the high energy particle loss imposes a limit on the heating power density, above which an increase in the heating power does not raise the energy transfer to the bulk particles, i.e. the heating efficiency deteriorates. This power limit is serious for losses with strong energy dependence such as ripple diffusion. Small spatial loss can annihilate the increment of the fusion reaction by tail generation.

日本語訳

空間損失がICR(イオンサイクロトロン共鳴)波動加熱に及ぼす影響を研究する。フォッカー・プランク方程式において、エネルギー依存の損失項に対する単純なモデルを採用する。基本サイクロトロン共鳴による少数イオン加熱の場合を解析する。高エネルギー粒子の損失が加熱パワー密度に上限を課すことが見出される。この上限を超えると、加熱パワーを増大させてもバルク粒子へのエネルギー伝達は増加せず、加熱効率が低下する。このパワー上限は、リップル拡散のようなエネルギー依存性の強い損失の場合に深刻となる。小さな空間損失であっても、テール生成による核融合反応の増分を消失させ得る。

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Ion cyclotron heating
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