Title :
A W-band gyrotron travelling wave amplifier using a helically corrugated waveguide
Author :
He, W. ; Phelps, A.D.R. ; Cross, A.W. ; Donaldson, C.R. ; Ronald, K.
Author_Institution :
Dept. of Phys., Univ. of Strathclyde, Glasgow, UK
Abstract :
A gyrotron traveling wave amplifier (gyro-TWA) with a cusp electron gun and a helically corrugated waveguide operating in the W-band is presented. The large orbit electron beam from the cusp gun interacts resonantly with an ideal eigenwave existing in the interaction region based on the cyclotron resonance maser instability. When driven by the electron beam of energy 40 keV and current 1.5 A, the amplifier was simulated to output 10 kW (CW) with a 3 dB frequency bandwidth of 90-100 GHz and saturated gain of 40 dB. Linear analysis and numerical simulations of the performance characteristics of the amplifier will be presented.
Keywords :
cyclotron masers; eigenvalues and eigenfunctions; electron beams; electron guns; gyrotrons; helical waveguides; millimetre wave amplifiers; numerical analysis; travelling wave amplifiers; W-band gyro-TWA; W-band gyrotron travelling wave amplifier; bandwidth 90 GHz to 100 GHz; current 1.5 A; cusp electron gun; cyclotron resonance maser instability; electron volt energy 40 keV; gain 3 dB; gain 40 dB; helically corrugated waveguide; ideal eigenwave; large orbit electron beam; linear analysis; numerical simulation; power 10 kW; Approximation methods; Dispersion; Gyrotrons; Microwave amplifiers; Spectroscopy; Trajectory; Waveguide components;
Conference_Titel :
High Power Particle Beams (BEAMS), 2008 17th International Conference on
Conference_Location :
Xian
