Showing papers by "G. G. Denisov published in 1990"

Suppression of self-excitation in a relativistic cyclotron-resonance maser/traveling-wave tube with an absorbing waveguide

Abstract: It is shown that when a lossy waveguide is used in a cyclotron-resonance maser/traveling-wave tube a high gain can be achieved without parasitic self-excitation of counterpropagating and quasicritical waves. This method of discrimination of parasitic modes through a shortening of the length in which their fields are concentrated is more efficient than in the case of a Cerenkov traveling-wave tube (where only an inertial bunching of the particles develops) because of the increased role of the force bunching, which for certain parameters leads to predominance of the cyclotron absorption of the wave over the emission