Structure of small-scale standing azimuthal Alfven waves interacting with high-energy particles in the magnetosphere

The effect of a bounce-drift instability on the structure of azimuthal-small scale Alfven waves in the magnetosphere with an account of the geomagnetic field power lines curvature in the approximation of the plasma background zero pressure is studied. The Alfven wave, being standing in the direction of the power lines, is running across the magnetic shells. Strengthening due to interaction with a group of energetic particles occurs during the process of the wave propagation by the magnetosphere with an increment, depending on the radial coordinate. The increment thereby tends to zero and the mode attenuates completely due to energy dissipation in the ionosphere close to the surface of the Alfven resonance