Saxena, Vikrant ; Avinash, K. ; Sen, A. (2012) Dust cluster explosion Physics of Plasmas, 19 (9). Article ID 093706. ISSN 1070-664X
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Official URL: http://aip.scitation.org/doi/10.1063/1.4754010
Related URL: http://dx.doi.org/10.1063/1.4754010
Abstract
A model for the dust cluster explosion where micron/sub-micron sized particles are accelerated at the expense of plasma thermal energy, in the afterglow phase of a complex plasma discharge is proposed. The model is tested by molecular dynamics simulations of dust particles in a confining potential. The nature of the explosion (caused by switching off the discharge) and the concomitant dust acceleration is found to depend critically on the pressure of the background neutral gas. At low gas pressure, the explosion is due to unshielded Coulomb repulsion between dust particles and yields maximum acceleration, while in the high pressure regime it is due to shielded Yukawa repulsion and yields much feebler acceleration. These results are in agreement with experimental findings. Our simulations also confirm a recently proposed electrostatic (ES) isothermal scaling relation, PE∝Vd-2 (where PE is the ES pressure of the dust particles and Vd is the confining volume).
Item Type: | Article |
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Source: | Copyright of this article belongs to American Institute of Physics. |
ID Code: | 102842 |
Deposited On: | 09 Mar 2018 10:42 |
Last Modified: | 09 Mar 2018 10:42 |
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