Title :
Operation of a high performance, harmonic-multiplying, inverted gyrotwystron
Author :
Guo, Hezhaong ; Chen, Shiaw-Huei ; Granatstein, Victor L. ; Rodgers, John ; Nusinovich, Gregory S. ; Walter, Mark T. ; Zhao, J. ; Chen, Wenjun
Author_Institution :
Inst. for Plasma Res., Maryland Univ., College Park, MD, USA
fDate :
6/1/1998 12:00:00 AM
Abstract :
Experiment on a new type of high-power, millimeter wave amplifier, (a harmonic-multiplying, inverted gyrotwystron), are reported. Superior stability resulted from two factors: (1) interaction between a relatively low order waveguide mode (TE22) and the beam wave at the fundamental cyclotron frequency in the traveling wave input section; (2) an internal mode filter in the highly overmoded (TE42p ), second harmonic output cavity. Bandwidth was 1.3% with saturated gain of 33 dB around 31.8 GHz. The gain-band width performance represents a significant advance for gyrotron amplifiers operating in such high order modes, and is thought to be due in part to operation of the long output cavity in several modes with different axial eigennumber (p=3, 4, 5) but with overlapping spectral regions
Keywords :
gyrotrons; millimetre wave power amplifiers; stability; beam wave; fundamental cyclotron frequency; gain-band width performance; gyrotron amplifiers; high performance harmonic-multiplying inverted gyrotwystron; high-power millimeter wave amplifier; internal mode filter; operation; overlapping spectral regions; saturated gain; second harmonic output cavity; stability; traveling wave input section; Bandwidth; Cyclotrons; Frequency; Gain; Gyrotrons; High power amplifiers; Operational amplifiers; Power harmonic filters; Stability; Tellurium;
Journal_Title :
Plasma Science, IEEE Transactions on
