Abstract
One of the mechanisms of appearance of the high-frequency noise of intense electron flows formed by explosive emission cathodes is theoretically analyzed. It is shown that the main source of noise radiation in devices using explosive emission electron injectors can be the Shot effect related with the partial character of particle emission. The main energy characteristics of electron flow noise radiation are estimated and the influence of noise on the operation of a relativistic backward wave tube (BWT) is studied. The rate of formation of steady-state oscillations in BWT self-oscillators, the minimal level of the input signal necessary for stable BWT amplifier operation, and the spectral density of the input electromagnetic signal excitation-equivalent to the electron flow noise radiation are estimated.
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