With the aim of gaining a better physical insight into linear regimes in gyrotrons, a new linear
model was developed. This model is based on a spectral approach for solving the self-
consistent system of equations describing the wave-particle interaction in the cavity of a
gyrotron oscillator. Taking into account the wall-losses self-consistently and including the
main system inhomogeneities in the cavity geometry and in the magnetic field, the model is
appropriate to consider real system parameters. The main advantage of the spectral …