Title :
Experimental demonstration of a W-band gyro-BWO using a helically corrugated waveguide
Author :
Donaldson, C.R. ; He, W. ; Phelps, A.D.R. ; Li, F. ; Zhang, L. ; Cross, A.W. ; Ronald, K. ; Robertson, C.W. ; Whyte, C.G. ; Young, A.R.
Author_Institution :
Dept. of Phys., Univ. of Strathclyde, Glasgow, UK
Abstract :
The experimental demonstration of a gyrotron backward wave oscillator (gyro-BWO) using a cusp electron gun and helically corrugated waveguide will be presented. Operating in the W-band frequency range the gyro-BWO is predicted to output ~10 kW with a frequency tuning range of 85-104 GHz at 18% electronic efficiency before the energy recovery. The annular axis-encircling electron beam has been experimentally measured to show a 1.5 A, 40 kV beam with velocity ratio up to 1.56 at 1.65 T. Preliminary microwave radiation has been measured over a frequency range of 92 to 100 GHz.
Keywords :
backward wave oscillators; electron guns; gyrotrons; helical waveguides; W-band gyro-BWO; annular axis-encircling electron beam; current 1.5 A; cusp electron gun; efficiency 18 percent; frequency 85 GHz to 104 GHz; gyrotron backward wave oscillator; helically corrugated waveguide; voltage 40 kV; Electron beams; Harmonic analysis; Helium; Magnetic field measurement; Magnetic fields; Microwave measurements; Plasmas;
Conference_Titel :
Infrared Millimeter and Terahertz Waves (IRMMW-THz), 2010 35th International Conference on
Conference_Location :
Rome
Print_ISBN :
978-1-4244-6655-9
DOI :
10.1109/ICIMW.2010.5612832
