Title :
A W-band gyrotron traveling wave amplifier based on a cusp electron gun
Author :
Donaldson, C.R. ; He, W. ; Zhang, L. ; Cross, A.W. ; McElhinny, P. ; Phelps, A.D.R. ; Ronald, K.
Author_Institution :
Dept. of Phys., Univ. of Strathclyde, Glasgow, UK
Abstract :
A W-band gyrotron traveling wave amplifier (gyro-TWA) with helically corrugated waveguide and cusp electron gun is presented. The beam-wave interaction, based on the cyclotron resonance maser instability, is driven by a 40 keV, 1.5 A axis-encircling electron beam generated by the cusp electron gun. Numerical simulations predict a maximum output of 5-10 kW (CW) with a 3 dB frequency bandwidth of 90-100 GHz and a saturated gain of 40 dB. Linear analysis and numerical simulation of the performance characteristics of the amplifier will be presented as well as the latest experiment measurements.
Keywords :
cyclotron masers; electron beams; electron guns; gyrotrons; helical waveguides; millimetre wave amplifiers; numerical analysis; travelling wave amplifiers; W-band gyrotron; axis-encircling electron beam; bandwidth 90 GHz to 100 GHz; beam wave interaction; current 1.5 A; cusp electron gun; cyclotron resonance maser instability; electron volt energy 40 keV; gain 40 dB; gyro-TWA; helically corrugated waveguide; linear analysis; numerical simulations; traveling wave amplifier; Broadband amplifiers; Couplers; Electron beams; Gain; Helium; Magnetic fields; Microwave amplifiers;
Conference_Titel :
Infrared, Millimeter and Terahertz Waves (IRMMW-THz), 2011 36th International Conference on
Conference_Location :
Houston, TX
Print_ISBN :
978-1-4577-0510-6
Electronic_ISBN :
2162-2027
DOI :
10.1109/irmmw-THz.2011.6105091
