Stopping of Gyratory Fast Particle in Magnetized Cold Plasma

The energy loss by a test gyratory particle in a cold plasma in the presence of homogeneous magnetic field is considered. Analytical and numerical results for the rate of energy loss are presented. This is done for strong and weak fields (i. e., when the electron cyclotron frequency is either higher, or smaller than the plasma frequency), and in case, when the test particle velocity is greater than the electron thermal velocity. It is shown that the rate of energy loss may be much higher than in the case of motion through plasma in the absence of magnetic field.