Separate scaling factors for e-e, e-i, and i-i collisions in kinetic plasma simulations preserve electron and ion relaxation rates and electron-ion energy exchange timescales under reduced speed of light and mass ratio.
In the typical use case of matching the simulated and physical systems at ion scales, this means the electron mass is effectively increased asK m = (me)sim/(me)phys
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Particle collisionality in scaled kinetic plasma simulations
Separate scaling factors for e-e, e-i, and i-i collisions in kinetic plasma simulations preserve electron and ion relaxation rates and electron-ion energy exchange timescales under reduced speed of light and mass ratio.