Electron stream polyharmonic modulation at the alternating field amplitude step

We have considered the cascade longitudinal modulation and grouping of an electron stream passing through а succession of thin diaphragms under the assumption that on either side of each diaphragm an arbltrary set of alternating electric fields of various frequencies, amplitudes, and phases acts on the electrons. An expression for the density of the output convective current has been derived, limit transitions to some special modulator configurations have been performed, and the feasibility of efficiently controlling the first current harmonic bу simultaneous double-frequency infiuence upon the electron stream has been demonstrated.