Title :
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
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;
Conference_Titel :
Vacuum Electronics Conference, 2007. IVEC '07. IEEE International
Conference_Location :
Kitakyushu
Print_ISBN :
1-4244-0633-1
DOI :
10.1109/IVELEC.2007.4283302
