TITLE

Current drive in recombining plasma

AUTHOR(S)
Schmit, P. F.; Fisch, N. J.
PUB. DATE
October 2011
SOURCE
Physics of Plasmas;Oct2011, Vol. 18 Issue 10, p102102
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The Langevin equations describing the average collisional dynamics of suprathermal particles in nonstationary plasma remarkably admit an exact analytical solution in the case of recombining plasma. The current density produced by arbitrary particle fluxes is derived including the influence of charge recombination. Since recombination has the effect of lowering the charge density of the plasma, thus reducing the charged particle collisional frequencies, the evolution of the current density can be modified substantially compared to plasma with fixed charge density. The current drive efficiency is derived and optimized for discrete and continuous pulses of current, leading to the discovery of a nonzero 'residual' current density that persists indefinitely under certain conditions, a feature not present in stationary plasmas.
ACCESSION #
66903297

 

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