Advances in W-Band TE01 Gyro-TWT Amplifier Design

Author

Barnett, L.R. ; Luhmann, N.C., Jr. ; Chiu, C.C. ; Chu, K.R. ; Yan, Ying Chu

Author_Institution

Univ. of CA-Davis, Davis

fYear

2007

fDate

15-17 May 2007

Firstpage

1

Lastpage

2

Abstract

Normally a gyro-TWT is highly unstable. Instrumental for stability achievement was the use of a high gradient magnetic coil on the output. We have made experimental measurements showing that the TE₀₁ mode absolute instability oscillation threshold is increased as much as a factor of five with modest output coil suppression field. Improving the electron beam power and quality is essential to increasing the power and performance of the gyrotwt. We have designed a new magnetron injection gun (MIG) with alpha= 1.5 and calculated axial velocity spread.

Keywords

cathodes; coils; electron guns; gyrotrons; magnetrons; millimetre wave amplifiers; stability; travelling wave amplifiers; W-band TE₀₁ mode gyro-TWT amplifier design; absolute instability oscillation threshold; axial velocity spread; coil suppression field; electron beam power; electron beam quality; high gradient magnetic coil; magnetron injection gun; stability achievement; Bandwidth; Cathodes; Coils; Current density; Electron beams; Power amplifiers; Rough surfaces; Stability; Surface roughness; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Vacuum Electronics Conference, 2007. IVEC '07. IEEE International

Conference_Location

Kitakyushu

Print_ISBN

1-4244-0633-1

Type

conf

DOI

10.1109/IVELEC.2007.4283302

Filename

4283302