Title :
Design, simulation and experiment of a cusp electron beam for millimeter wave gyro-devices
Author :
He, Wenlong ; Donaldson, Craig R. ; Li, Fengping ; Cross, Adrian W. ; Phelps, Alan D R ; Ronald, Kevin ; Robertson, Craig W. ; Whyte, Colin G. ; Zhang, Liang
Author_Institution :
Dept. of Phys., Univ. of Strathclyde, Glasgow, UK
Abstract :
The design, simulation and experiment of a thermionic cusp electron gun that is to be used for millimeter wave generation will be presented. A cusp gun uses a non-adiabatic magnetic field reversal to obtain azimuthal motion on an electron beam resulting in an annular shaped, axis-encircling beam. The cusp gun was designed to generate a beam of 1.5 A at 40 kV with an adjustable velocity ratio of up to 3.0. The beam had a simulated axial velocity spread of 7.4% and alpha spread of 10.1%. The beam had an averaged radius of 0.35 mm and beam thickness of 0.05 mm which is ideal to drive sub-mm wave gyro-devices under investigation.
Keywords :
electron guns; gyrotrons; adjustable velocity ratio; axis-encircling beam; cusp electron beam; cusp gun; millimeter wave gyro-devices; radius 0.35 mm; size 0.05 mm; Coils; Cyclotrons; Electron beams; Frequency; Gyrotrons; Helium; Magnetic fields; Physics; Power amplifiers; Power generation; Cusp; electron gun; gyrotron; millimetre wave gyro-device;
Conference_Titel :
Vacuum Electronics Conference, 2009. IVEC '09. IEEE International
Conference_Location :
Rome
Print_ISBN :
978-1-4244-3500-5
Electronic_ISBN :
978-1-4244-3501-2
DOI :
10.1109/IVELEC.2009.5193453
