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Enhanced confinement regimes with strong electron heating in the presence of flat or inverted safety factor profiles

F Alladio, B Angelini, M L Apicella, G Apruzzese, E Barbato, M R Belforte, L Bertalot, A Bertocchi, M Borra, G Bracco1999年Plasma Physics and Controlled FusionIF 2.2出版社

The role of magnetic shear in affecting electron transport is discussed on the basis of the Frascati tokamak upgrade (FTU) data with central electron cyclotron resonance heating (ECRH) on the current ramp phase and with pellet injection. The results point out that strongly negative magnetic shear is not a necessary condition in order to have good electron transport and that magnetohydrodynamic (MHD) activity plays a crucial role in affecting the electron transport in the region with low/negative magnetic shear. The theoretical arguments for the dependence of transport on magnetic shear are reviewed and compared with the experimental evidence.

日本語訳

磁気シアが電子輸送に及ぼす影響の役割について、電流ランプ位相における中心電子サイクロトロン加熱(ECRH)とペレット入射を伴うフラスカティ・トカマク・アップグレード(FTU)のデータに基づいて議論する。結果は、強く負の磁気シアが良好な電子輸送を得るための必要条件ではないこと、そして磁気流体力学(MHD)活動が低/負の磁気シア領域における電子輸送に影響を与える上で重要な役割を果たすことを指摘している。輸送の磁気シア依存性に関する理論的議論を概説し、実験的証拠と比較する。

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