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We had met some problems in the research on field emitter array electron gun for TWT. An improved FEA electron gun was designed to overcome these problems. The electron beam trajectory simulation for this gun shows a good transmission characteristic, which can lessen the outgassing from the electrode surfaces. Vacuum baking process and activating process for the FEA were carried out to ensure good...
This paper describes the structure, the fabrication process and the test of an FEA electron gun. A three-dimensional electromagnetic simulation program MAFIA was used to design the FEA electron gun, and the electron beam trajectory was simulated under initial condition of emitted electron half angle of 30 degrees. The designed FEA electron gun, Fig. 1 shows its photo, includes cathode, Wehnelt electrode,...
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