Electron vortex generation by strong, localized plasma heating

Citation
Tm. Abdalla et al., Electron vortex generation by strong, localized plasma heating, PHYS PLASMA, 8(9), 2001, pp. 3957-3966
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS OF PLASMAS
ISSN journal
1070-664X → ACNP
Volume
8
Issue
9
Year of publication
2001
Pages
3957 - 3966
Database
ISI
SICI code
1070-664X(200109)8:9<3957:EVGBSL>2.0.ZU;2-L
Abstract
The generation of electron vortical structures by strong localized heating is investigated analytically and numerically. The structure formation and i ts dynamics are described by the model of electron magnetohydrodynamics, ex tended to include pressure effects. Magnetic structures are generated by th e thermal electromotive force that arises due to nonalignment of pressure a nd density gradients. Their topology is determined by the heating power and the equilibrium density gradient. It is shown that strong localized heatin g of a nonuniform plasma generates vortical structures that are capable of confining and transporting heat across the plasma. The long term behavior o f the structures agrees qualitatively with stationary equilibrium solutions . As these structures survive for rather long times, a filamentary profile of the temperature develops. (C) 2001 American Institute of Physics.