Simulation of the particle balance in a tokamak

Journal Article · Thu Mar 01 04:00:00 EST 1984 · Sov. J. Plasma Phys. (Engl. Transl.); (United States)

OSTI ID:6171336

Dnestrovskii, Y N; Neudachin, S V; Pereverzev, G V

The mass transport coefficients in a tokamak plasma have been found through numerical simulation. The following processes were considered: MHD mixing at the internal m = 1 mode, pulsed gas injection, and the density decrease during electron-cyclotron-resonance heating (associated with the T-10, TM-4, Tuman-3, Alcator A, Alcator C, FT, and PLT tokamaks). The pinch velocity in the central part of the plasma column is near the neoclassical prediction, while at a sufficiently high density the pinch velocity at the periphery of the column is more than an order of magnitude higher than the neoclassical prediction. Over broad ranges of the parameters, the experimental results on the dynamics of the plasma density can be described reasonably well by the following empirical expressions for the diffusion coefficient D and the pinch velocity v/sub p/: D = (0.3--0.5)chi/sub e/approx.n/sup -1//sub e/ and V/sub p/ = ..cap alpha../sub p/cepsilon/sup 2/E/sub z/, where ..cap alpha../sub p/ = 50--70.

• Research Organization: I. V. Kurchatov Institute of Atomic Energy, Moscow
• OSTI ID: 6171336
• Journal Information: Sov. J. Plasma Phys. (Engl. Transl.); (United States), Journal Name: Sov. J. Plasma Phys. (Engl. Transl.); (United States) Vol. 10:2; ISSN SJPPD
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
CLOSED PLASMA DEVICES
CONFINEMENT TIME
ENERGY BALANCE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TUMAN DEVICES