Charge fluctuations for particles on a surface exposed to plasma

Details Charge fluctuations for particles on a surface exposed to plasma Charge fluctuations for particles on a surface exposed to plasma

2011-02-09

arxiv.org/abs/1102.1986v1

Physics

Plasma Physics

9 pages, 3 figures

Scientific paper

We develop a stochastic model for the charge fluctuations on a microscopic dust particle resting on a surface exposed to plasma. We find in steady state that the fluctuations are normally distributed with a standard deviation that is proportional to $CT_{e})^{1/2}$, where $C$ is the particle-surface capacitance and $T_{e}$ is the plasma electron temperature. The time for an initially uncharged ensemble of particles to reach the steady state distribution is directly proportional to $CT_{e}$.

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