Design and testing of an electron gun producing a segmented sheet beam for a quasi-optical gyrotron

Author

Read, Michael E. ; Dudas, Alan J. ; Petillo, John J. ; Tran, M.Q.

Author_Institution

Phys. Sci. Inc., Alexandria, VA, USA

Volume

39

Issue

3

fYear

1992

fDate

3/1/1992 12:00:00 AM

Firstpage

720

Lastpage

726

Abstract

A high-power sheet beam electron gun for a quasi-optical gyrotron has been developed. The gun produces two beams with rectangular cross sections, with one beam segmented into 11 beamlets. The beamlets are spaced so as to be in line with the maxima of the RF field profile in the resonator of a 120-GHz quasi-optical gyrotron. The maximum current in the segmented beam is nominally 34 A, while the unsegmented beam is 68 A. The gun has been tested, and it has operated essentially as predicted by 2-D and 3-D theory. In particular, the overall beam shape is largely undistorted, and the beamlets are, for most cases, well aligned

Keywords

electron guns; electron tube testing; gyrotrons; 120 GHz; 34 A; 68 A; EHF; MM-wave type; aligned beamlets; electron gun; microwave tubes; quasi-optical gyrotron; quasioptical type; rectangular cross sections; resonator; segmented sheet beam; testing; Current density; Electron beams; Geometrical optics; Gyrotrons; Magnetic separation; Mirrors; Optical resonators; Radio frequency; Solids; Testing;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.123500

Filename

123500