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Investigation of the H-mode during ECRH in the T-10 tokamak |
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| Authors: | V V Alikaev A A Borshchegovskii V A Vershkov V V Volkov A V Gorshkov Yu V Gott S A Grashin M M Dremin L G Eliseev Yu V Esipchuk V A Zhuravlev A M Kakurin G S Kirnev N A Kirneva A Ya Kislov D A Kislov I V Klimanov V A Kochin V A Krupin S V Krylov A V Melnikov T B Myalton A Yu Novikov G E Notkin Yu D Pavlov V V Piterskii V I Poznyak I N Roi P V Savrukhin V V Sannikov S V Soldatov M M Stepanenko A V Sushkov K N Tarasyan V M Trukhin E V Trukhina L N Khimchenko V V Chistyakov D A Shelukhin |
| Institution: | (1) Nuclear Fusion Institute, Russian Research Centre Kurchatov Institute, pl. Kurchatova 1, Moscow, 123182, Russia |
| Abstract: | An improved confinement regime with an external transport barrier (H-mode) is obtained during electron-cyclotron resonance heating of a plasma in the T-10 tokamak. A characteristic feature of this regime is a spontaneous density growth accompanied by a drop in the intensity of Dα line and an increase in βp by a factor of ～1.6. The threshold power for the L-H transition is close to that predicted by the ITER scaling. The best characteristics of the H-mode are achieved with decreasing q L to 2.2. It is shown that the external transport barrier arises for electrons, whereas the heat transport barrier insignificantly contributes to improved confinement. |
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