COUPLED CAVITIES DELAY LINE FOR A TRAVELLING-WAVE TUBE, AND TRAVELLING-WAVE TUBE COMPRISING SUCH A LINE

摘要

In the last section of a delay line having coupled cavities for a traveling-wave tube, the following parameters are progressively increased in the direction of propagation of the electron beam: the diameter of the opening provided for the passage of the electron beam, thus making it possible to ensure better transmission of the beam and consequently to ensure higher efficiency as well as lower heat build-up; the ratio (D2-D1)/2 of the cavity nozzles; and the thickness of the walls which are common to two adjacent cavities.