Experimental investigation of electron guns for THz microwave vacuum amplifiers

A. A. Burtsev; Yu. A. Grigor’ev; I. A. Navrotsky; V. I. Rogovin; G. V. Sakhadzhi; K. V. Shumikhin

doi:10.1134/S1063785016050229

Experimental investigation of electron guns for THz microwave vacuum amplifiers

Authors: Burtsev A.A.¹, Grigor’ev Y.A.¹, Navrotsky I.A.¹, Rogovin V.I.¹, Sakhadzhi G.V.¹, Shumikhin K.V.¹
Affiliations:
1. ALMAZ Research and Production Enterprise
Issue: Vol 42, No 5 (2016)
Pages: 543-545
Section: Article
URL: https://journals.rcsi.science/1063-7850/article/view/199334
DOI: https://doi.org/10.1134/S1063785016050229
ID: 199334

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Abstract

Single-sheet and multiple beam electron emitters based on thermionic minicathodes for terahertz traveling-wave tubes have been studied. Data are presented for impregnated blade thermionic cathode with dimensions 0.1 × 0.7 mm and a maximum current density of 114 A/cm² in a pulsed mode. A variant of the five-beam electron gun with 0.25-mm-diameter cylindrical minicathodes in cells of a control grid is proposed that provides a current density of 85.5 A/cm² at a grid potential of 900–1000 V.