Nonlinear stopping power for ions moving in magnetized two-component plasmas

Hu, Zhang-Hu; Song, Yuan-Hong; Wang, Gui-Qiu; Wang, You-Nian
November 2009
Physics of Plasmas;Nov2009, Vol. 16 Issue 11, p112304
Academic Journal
Energy losses of test particles in magnetized two-component plasmas are investigated by means of particle-in-cell (PIC) simulations, taking into account the dynamic polarization effects of both the plasma ions and electrons. The influences of the magnetic field, the angle between the test particle velocity and magnetic field, and certain plasma parameters on the nonlinear stopping power are studied. Comparisons are made between the PIC simulations and the linearized dielectric theory to show the nonlinear effects on the stopping power. Simulation results show that the dynamic polarization effects of the plasma ions become significant and contribute mainly to the nonlinear stopping power for low particle velocities and strong magnetic field. The nonlinear effects are found to enhance the stopping power in low particle velocity regions.


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