Title :
3-D Finite-Element Analysis of TWT Grid Electron Guns
Author :
Coco, Salvatore ; Laudani, Antonino ; Pollicino, Giuseppe ; Dionisio, Roberto ; Martorana, Rosario
Author_Institution :
Catania Univ.
fDate :
4/1/2007 12:00:00 AM
Abstract :
A novel three-dimensional FE procedure for the analysis of electron guns inside traveling wave tubes (TWTs) is presented, illustrating its main features. In this procedure, electron trajectories modeling cathode emission are obtained by solving a Vlasov-Poisson system of equations together with the relativistic dynamical equations of motion, under consistent particle injection conditions. This coupled electromechanical problem is solved iteratively by assuming stationary conditions. Simulation results concerning a gridded electron gun are presented, showing good agreement with available experimental data
Keywords :
Poisson equation; Vlasov equation; electron guns; finite element analysis; travelling wave tubes; 3D finite element analysis; Vlasov-Poisson system; coupled electromechanical problem; grid electron guns; particle injection conditions; relativistic dynamical equations; traveling wave tubes; Electromagnetic analysis; Electron beams; Electron emission; Electron guns; Electron tubes; Finite element methods; Geometry; Iron; Maxwell equations; Radio frequency; Electron beams; electron guns; finite-element method (FEM); traveling wave tubes (TWTs);
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2006.890966
