HR: 0830h
AN: SM41B-0571    [PDF]
TI: Generation of electron holes and electron heating in the auroral upward current (inverted V) region : A simulation study
AU: * Matsukiyo, S
EM: matsu@ipp.mpg.de
AF: CIPS, Max-Planck-Institut fur Extraterrestrische Physik, MPI fur Extraterrestrische Physik, P.O.Box 1312, Garching, 85741 Germany
AU: Treumann, R A
EM: tre@mpe.mpg.de
AF: CIPS, Max-Planck-Institut fur Extraterrestrische Physik, MPI fur Extraterrestrische Physik, P.O.Box 1312, Garching, 85741 Germany
AU: Jaroschek, C H
EM: cjarosch@mpe.mpg.de
AF: CIPS, Max-Planck-Institut fur Extraterrestrische Physik, MPI fur Extraterrestrische Physik, P.O.Box 1312, Garching, 85741 Germany
AU: Scholer, M
EM: mbs@mpe.mpg.de
AF: CIPS, Max-Planck-Institut fur Extraterrestrische Physik, MPI fur Extraterrestrische Physik, P.O.Box 1312, Garching, 85741 Germany
AB: The presence of electron holes in and their effects on the auroral plasma is well established fact. FAST measurements have shown that both in the upward and downward current regions such holes are accompanied by various kinds of particle beams, and it is believed that they form as a result of the nonlinear evolution of instabilities caused by these beams. We study various types of beam instabilities in application to the upward current region (downward auroral electron beam, upward ions, two-temperature electron plasma), using a one-dimensional full-particle simulation code. It is shown that several instabilities can contribute to the formation of holes and to their dynamics, but the most important one is the two-stream instability which can occure even under auroral conditions. We investigate the dynamics of the electron beam and the plasma under hole formation, plasma heating, and the evolution of the distribution functions in view of the application to the processes in the auroral upward current region.
DE: 2704 Auroral phenomena (2407)
DE: 7815 Electrostatic structures
DE: 7839 Nonlinear phenomena
DE: 7843 Numerical simulation studies
DE: 7871 Waves and instabilities
SC: SPA - Magnetospheric Physics [SM]
MN: 2003 Fall Meeting