Abstract
The mechanisms for the interaction between dust grains in a low-temperature plasma are analyzed theoretically with the aim of describing the grain coagulation process. It is shown that the experimentally observed coagulation process cannot be described by taking into account only electrostatic interaction between the grains. A theoretical model is proposed that describes the interaction between dust grains by accounting for the redistribution of the ion fluxes over the grain surfaces under the action of the electrostatic field of a neighboring grain. The model is employed to analytically calculate the rate constant for the dust grain coagulation. The theory developed is used to explain for the first time the nature of the experimentally observed coagulation threshold and to estimate the critical grain size above which the grains stop growing by the deposition from a gaseous phase and start to coagulate. The applicability of the model proposed to a quantitative description of the coagulation dynamics is discussed.
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Translated from Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 73, No. 10, 2003, pp. 51–60.
Original Russian Text Copyright © 2003 by Olevanov, Mankelevich, Rakhimova.
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Olevanov, M.A., Mankelevich, Y.A. & Rakhimova, T.V. Coagulation rate of dust grains in a low-temperature plasma. Tech. Phys. 48, 1270–1279 (2003). https://doi.org/10.1134/1.1620120
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DOI: https://doi.org/10.1134/1.1620120