On kinetic Alfven waves in a dusty plasma

The dispersion and damping of a dust-modified kinetic Alfven wave, and a lo wer frequency dust kinetic Alfven wave, is investigated in a dusty plasma c omprising electrons, ions, and negative dust. it is found that, when dust d ynamics is neglected, the presence of cold dust modifies the usual kinetic Alfven wave dispersion and damping owing to the inequality of the electron and ion densities. The dispersion relation of the dust kinetic Alfven wave, with frequency below the dust cyclotron frequency, depends on the density and temperature parameters of all three species, and the wave damping is du e to both electrons and ions. (C) 1999 Published by Elsevier Science B.V.