Title :
The design and simulation of a thermionic cusp-based axis-encircling electron beam for use in harmonic gyro-devices
Author :
Rafferty, Euan G. ; Phelps, A.D.R. ; He, W. ; Cross, A.W. ; Ronald, K.
Author_Institution :
Dept. of Phys., Strathclyde Univ., Glasgow, UK
fDate :
27 Sept.-1 Oct. 2004
Abstract :
A thermionic cusp gun is proposed for use in a 3 MW second harmonic X-band gyro-TWA with a helically corrugated waveguide interaction region. The passage of an electron beam through a non-adiabatic magnetic field reversal converts part of the electron beam´s axial velocity into axis-encircling transverse velocity. The paper presents the design and simulation of this cusp based electron beam forming system, yielding a 10 MW, 83 A axis encircling beam with an axial velocity spread Δvz<16% suitable for use in harmonic gyro-devices.
Keywords :
electron beams; electron guns; gyrotrons; helical waveguides; thermionic electron emission; travelling wave amplifiers; 10 MW; 3 MW; 83 A; axis encircling electron beam; axis encircling transverse velocity; cusp based electron beam forming system; electron beam axial velocity; harmonic gyro devices; helically corrugated waveguide interaction region; nonadiabatic magnetic field; second harmonic X-band gyro-TWA; thermionic cusp gun; Dispersion; Electron beams; Geometry; High power microwave generation; Magnetic fields; Microwave devices; Microwave generation; Numerical simulation; Particle beams; Power generation;
Conference_Titel :
Infrared and Millimeter Waves, 2004 and 12th International Conference on Terahertz Electronics, 2004. Conference Digest of the 2004 Joint 29th International Conference on
Print_ISBN :
0-7803-8490-3
DOI :
10.1109/ICIMW.2004.1422258
