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Статья

Kinetic energy of a monolayer of dust particles in gas discharge plasma

Ukrainian Journal of Physics. 2011. Vol. 56. No. 12. P. 1299-1303.
Timofeev A., Norman G. E.

The  phenomenon of the  abnormal heating of oscillations of dust particles in a gas discharge plasma is studied. Equations of motion of of dust particles with  allowance for charge  fluctuations and  the structural  features of a near-electrode layer  are  formulated. The molecular dynamics simulation  of the  system of dust particles is performed.  The  mechanism of increase of the average kinetic  en- ergy  of dust particles in  a  gas-discharge plasma is proposed. It is shown  that charge  fluctuations cause  forced  oscillations, which tend to  the  warming up  of vertical  oscillations of dust particles. The  combination of parametric and  forced  resonances can  explain the  anomalously high  values  of the  kinetic  energy  of dust particles. The  estimated frequency, amplitude, and  kinetic  energy  of oscilla- tions  of dust particles are  close to  the  experimental values.