Electrostatic acceleration of a modulated electron beam

It is shown that the electrostatic acceleration of a dynamically modulated electron beam leads to a slowdown of the electron-bunching process and therefore to a reduction in the electronic efficiency of the device. The electrostatic acceleration of an amplitude-modulated beam, however, is free of this disadvantage. In the case of amplitude modulation, a change in electron velocities does not lead to a change in the form and spectrum of the current, and the growth of current power is not accompanied by a reduction in electronic efficiency.