Study of kinetic Alfven wave in the magnetized dusty plasma-particle aspect analysis

The effect of charged dust grain is examined on the field-aligned current, perpendicular current (with respect to B-o), dispersion relation and growth rate for the kinetic Alfven wave with bi-Maxwellian distribution function. It is found that negative charge residing on dust grain, enhances the wave frequency and growth rate; however, the frequency obtained is smaller to that of the wave supported by ions and electrons only. The effect of charge concentration on dust grain is found to increase the perpendicular current and to decrease the parallel current to maintain the current continuity. The dust particle density reduces the wave frequency and the growth rate. The present calculation suggests that the presence of dust particles in amoral region may change the scenario of magnetosphere-ionosphere coupling processes and related phenomena.