Fast ion loss-driven H-mode transition in RF discharge plasmas of the Uragan-3M torsatron
| العنوان: | Fast ion loss-driven H-mode transition in RF discharge plasmas of the Uragan-3M torsatron |
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| المؤلفون: | P. Ya. Burchenko, D. V. Kurilo, S. A. Tsybenko, L.I. Grigor'eva, N. V. Zamanov, A.S. Slavnyj, A. A. Beletskii, Ye. L. Sorokovoy, A. Ye. Kulaga, V.V. Chechkin, E. L. Sorokovoy, Yu. S. Lavrenovich, V. S. Romanov, Yu.K. Mironov, E.D. Volkov, A.V. Lozin |
| المصدر: | Plasma Physics Reports. 35:852-859 |
| بيانات النشر: | Pleiades Publishing Ltd, 2009. |
| سنة النشر: | 2009 |
| مصطلحات موضوعية: | Physics, Work (thermodynamics), Range (particle radiation), Electron density, Physics and Astronomy (miscellaneous), Physics::Plasma Physics, Divertor, Orbit (dynamics), Outflow, Plasma, Atomic physics, Condensed Matter Physics, Ion |
| الوصف: | In the l = 3 Uragan-3M (U-3M) torsatron with a helical divertor the plasma is produced and heated by RF field in the ω ≤ ωci range of frequencies. A two-temperature ion perpendicular energy distribution with a suprathermal tail sets in with heating. If the heating power is high enough, a spontaneous transition to an H-like confinement mode is observed. Recently, it has been supposed that the transition is connected with hotter and suprathermal ions (common name “fast ions“, FI) loss. The objective of this work is an experimental elucidation of the real link between the H-transition and FI loss. To do this, a transient regime of the RF discharge with two H-mode states is chosen, and the evolution is followed of electron density, FI content in the confinement volume, FI outflow to the divertor and edge potential. On the basis of juxtaposing of these processes, a conclusion is made that the H-mode transition in U-3M is really driven by FI loss. Possible mechanisms resulting in the transition are discussed, among them the ion orbit loss and the radial drift of helically-trapped ion orbits seem most probable. |
| تدمد: | 1562-6938 1063-780X |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::6b444f7c6a0058402dcd204415c183db https://doi.org/10.1134/s1063780x09100080 |
| حقوق: | CLOSED |
| رقم الأكسشن: | edsair.doi...........6b444f7c6a0058402dcd204415c183db |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Springer Verlag. | تدمد: | 15626938 1063780X |
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