THE EQUILLIBRIUM DISTRIBUTION FUNCTION OF ELECTRONS IN THE GUIDING CENTER FRAME

In the kinetics of electron cyclotron masers, the method based on the local field expansion in the guiding center frame has many advantages. In this paper, an equil-librium function of electrons applicable to this method is given. The function specifies the space distribution of the electron beam explicitly. On employing this function, a dispersion relation which can compare with that derived in the waveguide axis frame is obtained.