Title :
High-peak power Ka-band gyrotron oscillator experiments with slotted and unslotted cavities
Author :
Gold, S.H. ; Fliflet, A.W. ; Manheimer, W.M. ; McCowan, R.B. ; Lee, R.C. ; Granatstein, V.L. ; Hardesty, D.L. ; Kinkead, A.K. ; Sucy, M.
Author_Institution :
US Naval Res. Lab., Washington, DC, USA
fDate :
4/1/1988 12:00:00 AM
Abstract :
A Ka-band gyrotron oscillator powered by a compact pulseline accelerator has been operated using oscillator cavities with and without axial slots. The oscillator was operated at high voltage (~900 keV) and high current (~500 A) in the approximate frequency range of 20-50 GHz. The use of axial slots has been shown to suppress low-starting-current whispering-gallery modes, in particular, modes of the TEm2 type, allowing stable operation in a linearly polarized TE13 mode. A peak power of 35 MW has been observed at 6% efficiency
Keywords :
microwave generation; microwave oscillators; microwave tubes; 20 to 50 GHz; 500 A; 900 keV; Ka-band gyrotron oscillator; axial slotted cavity; low-starting-current whispering-gallery modes suppression; pulseline accelerator; Electron beams; Gold; Gyrotrons; Magnetic resonance; Oscillators; Power generation; Radio frequency; Tellurium; Threshold current; Whispering gallery modes;
Journal_Title :
Plasma Science, IEEE Transactions on
