Forming of high current density sheet electron beams for a sub-THZ TWT vacuum aamplifiers

In this paper we present the computer analysis of magnetic focusing sheet electron beam with low perveance in the electron-optical systems with an electron gun based on thermionic cathode with a current density of 100 A/cm
²
at the distance of tunnel 25 mm. The results of experimental study in the diode mode of impregnated thermionic cathode with linear dimensions 0,1 × 0,7 mm have shown the feasibility of using this cathode in sub-THz vacuum amplifiers.