Contribution to the theory of trigger radiation
Shapiro V.D., Shevchenko V.I.
A theory is constructed for the generation of monochromatic radiation when the magnetosphere is probed by whistlers of sufficiently large amplitude. The investigated generation mechanism is based on velocity bunching of the resonant particles in the field of the main wave. Radiation with time-varying frequency is produced when the resultant bunches move in the geomagnetic field.