Design of an electron gun for a 280 GHz induced-resonance-electron-cyclotron (IREC) maser experiment

Author

McCowan, Robert B. ; Pendleton, R.A. ; Fliflet, Arne W.

Author_Institution

US Naval Res. Lab., Washington, DC, USA

Volume

39

Issue

7

fYear

1992

fDate

7/1/1992 12:00:00 AM

Firstpage

1763

Lastpage

1767

Abstract

A thermionic electron gun capable of generating a high-quality annular electron beam for quasi-optical CARM and induced-resonance-electron-cyclotron (IREC) maser applications has been designed. The 500 kV, 200 A MIG-type electron gun has a curved emitting surface designed to compensate for radial electric field gradients across the cathode, and should produce an electron beam with ν_⊥/ν_z≈0.5 and Δν_z/ν_z<1%. The gun is also capable of producing an electron beam suitable for a multimegawatt 250 kV, 100 GHz quasi-optical gyrotron. Results are presented for electron trajectory calculations which have been performed for both the CARM/IREC maser and gyrotron operating regimes

Keywords

electron beams; electron guns; gyrotrons; masers; thermionic cathodes; thermionic electron emission; 100 GHz; 200 A; 250 kV; 280 GHz; 500 kV; EHF; IREC maser; MIG-type; THF; annular electron beam; cathode; curved emitting surface; electron trajectory calculations; induced-resonance-electron-cyclotron; maser experiment; quasi-optical CARM; quasi-optical gyrotron; thermionic electron gun; Cathodes; Cyclotrons; DC generators; Electron beams; Frequency; Gyrotrons; Masers; Particle beams; Plasma accelerators; Resonance;

fLanguage

English

Journal_Title

Electron Devices, IEEE Transactions on

Publisher

ieee

ISSN

0018-9383

Type

jour

DOI

10.1109/16.141245

Filename

141245