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10Complex Systems of Charged Particles and their Interactions with Electromagnetic Radiation 2016
ENEGRY TRANSFER AND PARAMETRIC RESONANCE
IN DUSTY PLASMA SYSTEM.
V.P. Semyonov, A.V. Timofeev
MIEMHSE, Moscow, Russia, e-mail: VPSemenov@gmail.com JIHT, Moscow, Russia
Phenomenon and mechanisms of an energy transfer between degrees of freedom of a dusty plasma system are of great interest in the field of dusty plasma. One of such mechanisms is based on parametric resonance [1]. Initial stages of such phenomena can be approximately described by the extended Mathieu equation [1-3]. Approach shown in [2,3] is approximate and valid only for dusty particles amplitude much smaller than interparticle distance, so it can't describe the saturation stage.
MD simulations is used to observe the saturation stage and describe energy transfer more accurate. Model is taking into account stochastic charge fluctuations, caused by fluctuations and discreteness of ions and electrons flow on the surface of dust particles, dependence of electric field intensity on vertical coordinate and dependence of particles charge on vertical coordinate, caused by changes in the concentrations of electrons and ions in the near-electrode layer.
Conditions of onset of energy transfer between degrees of freedom and its properties are obtained for a wide range of parameters using numerical approach. Dependence of growth rate of the energy on system parameters is described. The saturation stage is observed.
Obtained results are in a good agreement with results of linear approach [2,3], experimental data [4] and allow to describe energy transfer in dusty plasma more accurate. This work is supported by the Russian Science Foundation (project No. 14-19-01295).
References
[1] Norman G.E., Timofeev A.V., Phys. Rev. E, 2011, 84, 056401
[2] Semyonov V.P., Timofeev A.V., J. Phys.: Conf. Series, 2015, 653, 012138
[3] Semyonov V.P., Timofeev A.V., J. Phys.: Conf. Series, 2016, 681, 012025
[4] Vasilyak L.M., Fortov V.E., Morfill G.E. et al., Contrib. Plasma Phys., 2011, 51, 529
