Note on quantitatively correct simulations of the kinetic beam-plasma instability

preprint2014arXivOpen access

Abstract

A large number of model particles is shown necessary for quantitatively correct simulations of the kinetic beam-plasma instability with the clouds-in-cells method. The required number of particles scales inversely with the expected growth rate, as in the kinetic regime only a narrow interval of beam velocities is resonant with the wave.

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