Coarse-graining the electron distribution in turbulence simulations of tokamak plasmas
نویسندگان
چکیده
The Coarse-Graining Procedure (CGP) (Y. Chen and S. E. Parker, Physics of Plasmas 14, 082301 (2007)) is implemented in the GEM code for electrons. While CGP introduces numerical dissipation in the particle-in-cell (PIC) simulations, it is shown that CGP preserves physical dissipation effects such as the electron-ion collisional effects on the particle flux in Ion-Temperature-Gradient (ITG) driven turbulence. Kinetic simulation of an edge plasma is presented, which demonstrates the essential stabilizing effect of shear flow, and the destabilizing effect of magnetic field perturbation in such a plasma.
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تاریخ انتشار 2008