AbstractAbstract
[en] This work is devoted to the study of one of the pressing problems of thermonuclear fusion: the transition to the region of enhanced plasma confinement observed in tokamaks. It is shown that when such a transition occurs under certain conditions an intermediate self-excited regime can occur, characterized by the loss of fast electrons to the chamber wall. The role of the beam of fast electrons in bringing about the L-H transition is investigated. 4 refs., 5 figs
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Translated from Fiz. Plazmy.; 19, 645-653(May 1993).
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Translation
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AbstractAbstract
[en] How the anomalous diffusion of beam pariticles which arises upon the launching of lower-hybrid waves in tokamak plasma influences the characteristics of the given current is studied. The escape of fast electrons from a discharge due to fluctuations in the electric and magnetic fields in a plasma is studied as an example. The role played by this diffusion mechanism is studied for both trapped and untrapped particles in various drive regimes. A beam of resonant particles accelerated by lower-hybrid waves, as an entity which is quite anisotropic in velocity space, is a convenient diagnostic tool for determining the nature of the diffusing particles
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Translation
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AbstractAbstract
[en] A theory is derived for the dynamics of the fan instability of accelerated electrons in a tokamak from which fast particles are lost. The diffusion of particles in coordinate space which results from their quasilinear interaction with electrostatic plasma waves excited in the course of an instability is considered as a possible mechanism for the loss. For parameter values in the realistic region, the course of the fan instability may be of either a relaxation or quasisteady nature
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Cover-to-cover translation of Fizika Plazmy (USSR).
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AbstractAbstract
[en] In the recent experiments on current drive by EC waves (ECCD) in T-10-tokamak it has been found out that the transition from the L-mode into the original autooscillating mode, characterized by the periodic (τ ≅10-5s) release of suprathermal electrons upon the chamber walls with an increase in the launched RF-power occurs. A theoretical analysis of the reasons for the emergence of relaxational oscillations in the near-wall region is realized in a given study. (author) 1 ref., 3 figs
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ECCD (Electron Cyclotron Current Drive)
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1992 international conference on plasma physics; Innsbruck (Austria); 29 Jun - 3 Jul 1992
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Journal Article
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Conference; Numerical Data
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Dnestrovskij, Yu.N.; Danilov, A.V.; Dnestrovskij, A.Yu.; Lysenko, S.E.; Cherkasov, S.V.; Voitsekhovich, I.A.
Plasma Physics and Controlled Fusion; Role of Electric Fields in Plasma Confinement in Stellarators and Tokamaks. Alushta-2010. Book of Abstracts2010
Plasma Physics and Controlled Fusion; Role of Electric Fields in Plasma Confinement in Stellarators and Tokamaks. Alushta-2010. Book of Abstracts2010
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No abstract available
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European Physical Society (France); National academy of Sciences of Ukraine, Kyiv (Ukraine); National Science Center 'Kharkiv Institute of Physics and Technology', Kharkiv (Ukraine); Science and Technology Center in Ukraine (Ukraine); 215 p; 2010; p. 36; 4. International Conference-School and International Workshop; Alushta (Ukraine); 13-18 Sep 2010; Available from Ukrainian INIS Centre
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Miscellaneous
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