Simulation Studies of Plasma Heating and Nonlinear Evolutions of Electrostatic and Electromagnetic Instabilities in a Field-Aligned Counter-Streaming Plasma

Details Simulation Studies of Plasma Heating and Nonlinear Evolutions of Electrostatic and Electromagnetic Instabilities in a Field-Aligned Counter-Streaming Plasma Simulation Studies of Plasma Heating and Nonlinear Evolutions of Electrostatic and Electromagnetic Instabilities in a Field-Aligned Counter-Streaming Plasma

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm31b0322t&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SM31B-0322

Physics

7829 Kinetic Waves And Instabilities, 7839 Nonlinear Phenomena (4400, 6944), 7845 Particle Acceleration, 7846 Plasma Energization, 7867 Wave/Particle Interactions (2483, 6984)

Scientific paper

Nonlinear evolutions of electrostatic (ES) and electromagnetic (EM) instabilities in a field-aligned counter- streaming plasma are studied by means of a full particle code simulation and a Vlasov simulation. Our simulation results show that field-aligned counter-streaming plasma can lead to fast growing electrostatic two- stream instability to heat electrons along the background magnetic field directions. If the background magnetic field is not strong enough, the field-aligned heating can easily make the system unstable to the electromagnetic fire-hose instability. The nonlinear kinetic Alfven waves generated by the fire-hose instability can isotropize the electron pressure and heat ions by both ion-cyclotron instability and non-adiabatic ion gyro- reflections. Additional instabilities generated by the gyro-reflecting events can heat the plasma in a very efficient way. The importance of the cross-scale coupling between the ES instabilities and the EM instabilities in the space plasmas with counter-streaming plasma flows will be discussed.

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