Title :
The Design and Simulation of a Cusp Electron Beam Source for a W-Band Gyro-BWO Experiment
Author :
Donaldson, Craig Ross ; He, W. ; Phelps, A.D.R. ; Cross, A.W. ; Ronald, K.
Author_Institution :
Univ. of Strathclyde, Glasgow
Abstract :
Presented is the design of a cusp electron gun that is be used in a Gyrotron-Backward Wave Oscillator which is operating in the W-Band (75 - 110 GHz) frequency range. A cusp gun uses a non-adiabatic magnetic field reversal to impart azimuthal motion on an electron beam forming an axis-encircling beam. The cusp gun was designed to generate a beam of 2 A at 40 kV with a pitch factor of 1.65, in order to operate at a centre frequency of 94 GHz. The beam had an axial velocity spread of 7.4% with a beam radius spread of 12.2% and alpha spread of 10.1%.
Keywords :
backward wave oscillators; electron guns; gyrotrons; millimetre wave tubes; W-band Gyro-BWO experiment; axis-encircling beam; azimuthal motion; current 2 A; cusp electron beam source design; frequency 75 GHz to 110 GHz; gyrotron-backward wave oscillator; nonadiabatic magnetic field reversal; pitch factor; voltage 40 kV; Cathodes; Coils; Electron beams; Equations; Frequency; Gyrotrons; Magnetic fields; Optical coupling; Physics; Power generation; Cusp electron gun; Gyro-BWO; W-band; axis-encircling beam; electron beam source; high power microwave; large-orbit electron beam;
Conference_Titel :
Vacuum Electronics Conference, 2007. IVEC '07. IEEE International
Conference_Location :
Kitakyushu
Print_ISBN :
1-4244-0633-1
DOI :
10.1109/IVELEC.2007.4283321
