To the theory of ion-cyclotron instabilities of collisional rotating plasma

A review on modern state of the problem of ion-cyclotron instabilities of rotating plasma is presented. The role of collisions in ion-cyclotron instabilities has been studied. The problem on equilibrium of a plasma placed in crossed radial electric and longitudinal magnetic fields is considered. Integrals of particle motion and the equilibrium distribution function of plasma components are found. Dispersion relation of potential short-wave ion-cyclotron plasma oscillations with heterogeneous concentration is obtained. The relation obtained is studied for a particular case of heterogeneous plasma. It is shown that with an increase in the collision frequency the increments of ion-cyclotron instabilities decrease, and at high enough frequencies of collisions a complete stabilization of perturbations takes place