High-power cusp gun for harmonic gyro-device applications

Author

Gallagher, David A. ; Barsanti, M. ; Scafuri, Frederick ; Armstrong, Carter

Author_Institution

Defensive Syst. Div., Northrop Grumman Corp., Rolling Meadows, IL, USA

Volume

28

Issue

3

fYear

2000

fDate

6/1/2000 12:00:00 AM

Firstpage

695

Lastpage

699

Abstract

A cusp gun, designed to generate an axis encircling beam with low-velocity spread for high-harmonic high-power (70 kV, 3.5 A) operation in gyrotrons and peniotrons, was successfully fabricated and hot tested at reduced voltage in a beam tester designed to measure beam perveance, size, thickness, velocity ratio (beam α), and, in the near future, beam ripple and velocity spread. A relatively thin, round, hollow beam was imaged on the Cerium glass witness plate. Beam transmission through the anode was 98.5%. The beam α, as determined by capacitive probe data, agreed well with simulations over a large range of operating parameters.

Keywords

electron beams; electron guns; electron tube testing; gyrotrons; millimetre wave generation; millimetre wave tubes; 25 to 50 kW; 3.5 A; 35 GHz; 70 kV; 94 GHz; Ce glass witness plate; axis encircling beam; beam perveance; beam ripple; beam size; beam tester; beam thickness; beam transmission; beam velocity ratio; capacitive probe data; fabrication; gyrotrons; harmonic gyro-device applications; high-harmonic high-power operation; high-power cusp gun; hot testing; low-velocity spread; operating parameters; peniotrons; reduced voltage; thin round hollow beam; velocity spread; Anodes; Cerium; Glass; Gyrotrons; Probes; Size measurement; Testing; Thickness measurement; Velocity measurement; Voltage;

fLanguage

English

Journal_Title

Plasma Science, IEEE Transactions on

Publisher

ieee

ISSN

0093-3813

Type

jour

DOI

10.1109/27.887705

Filename

887705