Secondary electron emissions and dust charging currents in the nonequilibrium dusty plasma with power-law distributions

Abstract

We study the secondary electron emissions induced by the impact of electrons on dust grains and the resulting dust charging processes in the nonequilibrium dusty plasma with power-law distributions. We derive new expressions of the secondary emitted electron flux and the dust charging currents that are generalized by the power-law q-distributions, where the nonlinear core functions are numerically studied for the nonextensive parameter q. Our numerical analyses show that the power-law q-distribution of the primary electrons has a significant effect on the secondary emitted electron flux as well as the dust charging currents, and this effect depends strongly on the ratio of the electrostatic potential energy of the primary electrons at the dust grain's surface to the thermodynamic energy, implying that a competition in the dusty plasma between these two energies plays a crucial role in this novel effect.

16 pages, 6 figures, 32 references

References in corpus (2)

• Dust charging processes in the nonequilibrium dusty plasma with nonextensive power-law distribution
• Power-law distributions and fluctuation-dissipation relation in the stochastic dynamics of two-variable Langevin equations

Cited by in corpus (6)

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• Slowing down of charged particles in dusty plasmas with pawer-law kappa-distributions
• The collisional relaxation rate of kappa-distributed plasma with multiple components