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

fYear

2010

fDate

5-10 Sept. 2010

Firstpage

1

Lastpage

3

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared Millimeter and Terahertz Waves (IRMMW-THz), 2010 35th International Conference on

Conference_Location

Rome

Print_ISBN

978-1-4244-6655-9

Type

conf

DOI

10.1109/ICIMW.2010.5612832

Filename

5612832