the temperature and mass effects on dust grain electrical potential in dusty plasma

By orbit-limited motion (olm) theory and the kinetic model, currents carried by electrons and ions on the dust grain are obtained and the eects of tem- perature and drift velocity of ions on the dust grain electrical potential are considered. it is shown that the dust grain electrical potential and thus the dust grain charge are aected by density of ions (electrons) and dust grain. moreover, it is found that as the ratio of temperature electron-to-ion is raised, the plasma with heavier ions experiences the larger electric potential of the dust grain. furthermore, it is indicated that the dust grain electrical potential for the potassium plasma is signifcantly higher than the oxy- gen plasma. finally, it is shown that by decreasing the dust grain electrical potential and the electron temperature, the drift velocity of ions is increased.