The dynamics of multimode electronic masers
Abstract
Energy and phase mode interactions in multimode masers are investigated. If the threshold of selfexcitation in the oscillator is slightly exceeded and the modes in question have similar natural frequencies, then the principal nonlinear effect in the interaction between modes is their concurrence, which leads to the establishment of singlemode oscillations. When the beam current exceeds starting values by a larger amount, a mode with a low starting current, as a consequence of the dispersion of the nonlinearity of the electron flux, is able to support the oscillations of a mode of higher frequency; the increment of this highfrequency mode can be either positive or negative. Using a gyrotron as an example, it is shown that, as a result of this effect in an oscillator where there are three modes that differ considerably in frequency, the modes can be synchronized.
 Publication:

Radiotekhnika i Elektronika
 Pub Date:
 May 1982
 Bibcode:
 1982RaEl...27..996B
 Keywords:

 Electrodynamics;
 Masers;
 Microwave Oscillators;
 Multimode Resonators;
 Differential Equations;
 Dynamic Characteristics;
 Electrons;
 Integral Equations;
 Time Response;
 Lasers and Masers