Title :
Novel millimetre wave components for a W-band gyro-TWA
Author :
Cross, Adrian W. ; He, Wei ; Donaldson, C.R. ; Zhang, Leiqi ; McElhinney, P. ; Ronald, Kevin ; Phelps, Alan D. R.
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 millimetre wave components for the amplifier will be presented as well as the latest experimental measurements.
Keywords :
cyclotrons; electron beams; electron guns; gyrotrons; masers; millimetre wave devices; travelling wave amplifiers; waveguides; W-band gyro-TWA; 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; gyrotron traveling wave amplifier; helically corrugated waveguide; linear analysis; millimetre wave component; power 5 kW to 10 kW; saturated gain;
Conference_Titel :
Passive RF and Microwave Components, 3rd Annual Seminar on
Conference_Location :
London
Electronic_ISBN :
978-1-84919-542-3
DOI :
10.1049/ic.2012.0069
