Publication Date:
2015-12-25
Description:
Dust grains' potential variation is presented by using a non-equilibrium complex (dusty) plasma following the Vasyliunas Cairns ( VC )-distribution, in which the components such as the electrons, ions [positive and negative], and dust grains have negative charge. For this reason, mathematical statement of currents is solved for dust grains having negatively charge to accomplish the equilibrium state value (viz., q d = constant) in the presence of VC -distributed plasmas. Indeed, the current balance equations are modified due to the streaming/nonequilibrium distributed negative ions. Numerically, it is assessed that the important plasma variable, for example, spectral index α , spectral index κ , negative ions streaming velocity ( U 0 ), and negative ions number density ( ρ ) , significantly influences the dust grain surface potential ( | ψ d | ) by: (i) increasing the value of spectral index kappa ( κ ) and negative ions density ( ρ ) , the magnitude of dust surface potential ( | ψ d | ) decreases and (ii) increasing the values of spectral index α and negative ions streaming velocity ( U 0 ), dust grains surface potential ( | ψ d | ) increases. The relevance to low-temperature research center in a non-equilibrium dusty (complex) plasma is precisely discussed by associating oxygen ions (negative and positive) species.
Print ISSN:
1070-664X
Electronic ISSN:
1089-7674
Topics:
Physics
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