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Enhanced current drive efficiency in a long discharge on TRIAM-1M

K. Hanada, S. Itoh, K. Nakamura, H. Zushi, M. Sakamoto, E. Jotaki, Y.D. Pan, M. Hasegawa, S. Kawasaki, H. Nakashima2001年被引用 11Nuclear FusionIF 3出版社

The enhanced current drive (ECD) efficiency mode, which is characterized by a spontaneous increase of current drive efficiency ηCD from (0.3-0.4) × 1019A/W m-2 to (0.6-1.0) × 1019 A/W m-2,is observed in long pure LHCD plasmas on TRIAM-1M. The energy confinement time is also improved due to the increase of line averaged electron density, and of the ion and electron temperatures. The current drive efficiency is proportional to the electron density. The transition to ECD mode occurs at a critical density, which depends slightly on the refractive index in the toroidal direction N|| of the injected wave.

日本語訳

TRIAM-1Mにおける長時間純粋LHCDプラズマにおいて、電流駆動効率ηCDが(0.3-0.4)×10^19A/W m^-2から(0.6-1.0)×10^19 A/W m^-2へと自発的に増加することを特徴とする高効率電流駆動(ECD)モードが観測された。エネルギー閉じ込め時間も、線平均電子密度ならびにイオン温度および電子温度の増加により改善される。電流駆動効率は電子密度に比例する。ECDモードへの遷移は臨界密度で生じ、この臨界密度は入射波のトロイダル方向の屈折率N||にわずかに依存する。

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Current driveTRIAM-1M
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