Grain surface heating in cryogenic environment

Т. С. Рамазанов, Zh. A. Moldabekov, М. М. Муратов

2017

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DOI 10.1063/1.4982606
Data confidence 70 medium
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Abstract

The surface temperature of the dust particle in cryogenic complex plasmas at gas pressure 0.6–10 Pa is considered. It is shown that at low pressure the dust particle surface temperature is significantly higher than that of the background gas, as a result of which the atom drag force is comparable with the screened Coulomb interaction and even exceeds it for the large-size dust particles. As the gas temperature near the grain surface is a slowly decreasing function of distance with asymptotic ∼1/r behavior, for correct description of the cryogenic complex plasma at low gas pressure, it is important to include effects related to the dust particle surface temperature.