Perpendicular electron trapping associated with nonlinear whistlers

Citation
D. Jovanovic et al., Perpendicular electron trapping associated with nonlinear whistlers, PHYS PLASMA, 8(7), 2001, pp. 3217-3226
Citations number
35
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS OF PLASMAS
ISSN journal
1070-664X → ACNP
Volume
8
Issue
7
Year of publication
2001
Pages
3217 - 3226
Database
ISI
SICI code
1070-664X(200107)8:7<3217:PETAWN>2.0.ZU;2-Z
Abstract
Kinetic effects leading to the particle trapping are studied in a magnetize d, inhomogeneous plasma configuration within the framework of the gyrokinet ic theory in the frequency and spatial scale range that corresponds to the whistler waves. This treatment accounts for finite electron Larmor radius a nd polarization effects. A coherent nonlinear structure is found, which is identified as a magnetic vortex coupled with an electron hole. This novel e lectron hole is characterized by a strong magnetic field, and has a typical perpendicular size somewhat shorter than the electron collisionless skin d epth. Electrons are trapped in the perpendicular direction by the combinati on of the electrostatic field, arising from the charge separation, and of t he Lorentz force resulting from the propagation of the structure relative t o the perturbed magnetic field lines. The trapping effects are restricted t o the region at the center of the vortex. The size of this region is relate d to the electron Larmor-radius and to the Debye length. (C) 2001 American Institute of Physics.