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Physical mechanism for the temperature dependence of lower hybrid current drive efficiency

H Takase, K Okano, A Hatayama1991年Plasma Physics and Controlled FusionIF 2.2出版社

The volume-averaged electron temperature (Te) dependence of lower hybrid current drive efficiency is investigated by a newly-developed numerical simulation code in the framework of a ray-tracing code and a one-dimensional relativistic Fokker-Planck calculation. As a result of numerical simulations, the current drive efficiency increases with (Te), and the dependence can be explained by the large shift of the parallel refractive index in the low-temperature region ((Te)<or=10 keV) and by the relativistic effect in the high-temperature region (10<(Te)<or=20 keV). However, the current drive efficiency is not improved in the region higher than 20 keV.

日本語訳

体積平均電子温度(Te)の低域混成波電流駆動効率への依存性を、光線追跡コードと一次元相対論的フォッカー・プランク計算の枠組みにおける新たに開発した数値シミュレーションコードを用いて調査した。数値シミュレーションの結果、電流駆動効率はTeとともに増加し、その依存性は低温領域(Te≤10 keV)における平行屈折率の大きなシフトと、高温領域(10<Te≤20 keV)における相対論的効果によって説明できる。しかし、20 keVを超える領域では電流駆動効率は改善されない。

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Current driveLower hybridLower hybrid current drive
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