On transport-driven currents

Journal Article · Mon Aug 01 00:00:00 EDT 1994 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.870593· OSTI ID:7171304

Ma, S; Dawson, J M ^[1]

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1. Department of Physics, University of California, Los Angeles, California 90024-1547 (United States)

An empirical electron viscosity is incorporated into Ohm's law to examine the effect of current diffusion on bootstrap currents. It is shown that for sufficiently large viscosity, no seed current is needed for steady state operation of tokamaks. This is expressed by the scaling law [Gamma][ital R][sup 2][sub [ital m]]=4/27 where [ital R][sub [ital m]] is the magnetic Reynolds number and [Gamma] is viscosity normalized to [nu][sub [ital ei]][ital a][sup 2] ([nu][sub [ital ei]] is the electron--ion collision frequency and [ital a] is the system size).

• OSTI ID: 7171304
• Journal Information: Physics of Plasmas; (United States), Vol. 1:8; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BOOTSTRAP CURRENT
TRANSPORT THEORY
VISCOSITY
TOKAMAK DEVICES
ELECTRONS
MAGNETIC REYNOLDS NUMBER
OHM LAW
SCALING LAWS
CLOSED PLASMA DEVICES
CURRENTS
ELECTRIC CURRENTS
ELEMENTARY PARTICLES
FERMIONS
LEPTONS
REYNOLDS NUMBER
THERMONUCLEAR DEVICES
700330* - Plasma Kinetics
Transport
& Impurities- (1992-)