Title :
GATOR: A 3D time-dependent simulation code for helix TWTs
Author :
Zaidman, E.G. ; Freund
Author_Institution :
Naval Res. Lab., Washington, DC, USA
Abstract :
Summary form only given. A 3D nonlinear analysis of helix TWTs is presented. The analysis and simulation code is based upon a spectral decomposition using the vacuum sheath helix modes. The field equations are integrated on a grid and advanced in time using a MacCormack predictor-corrector scheme, and the electron orbit equations are integrated using a fourth order Runge-Kutta algorithm. Charge is accumulated on the grid and the field is interpolated to the particle location by a linear map. The effect of dielectric liners on the vacuum sheath helix dispersion is included in the analysis. Several numerical cases are considered. Simulation of the injection of a DC beam and a signal at a single frequency is compared with a linear field theory of the helix TWT interaction, and good agreement is found.
Keywords :
Runge-Kutta methods; numerical analysis; travelling wave tubes; 3D nonlinear analysis; 3D time-dependent simulation code; DC beam; GATOR; MacCormack predictor-corrector scheme; dielectric liners; electron orbit equations; field equations; fourth order Runge-Kutta algorithm; helix TWTs; linear field theory; linear map; particle location; simulation code; spectral decomposition; vacuum sheath helix dispersion; vacuum sheath helix modes; Analytical models; Dielectrics; Dispersion; Electrons; Fats; Frequency; Laboratories; Nonlinear equations; Particle beam injection; Plasma applications;
Conference_Titel :
Plasma Science, 1996. IEEE Conference Record - Abstracts., 1996 IEEE International Conference on
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-3322-5
DOI :
10.1109/PLASMA.1996.551667
