GATOR: A 3-D time-dependent simulation code for helix TWTs

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 equ...

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Bibliographic Details
Main Authors: Zaidman, E.G., Freund, H.P.
Format: Conference Proceeding
Language:English
Subjects:
COMPUTERIZED SIMULATION
ENGINEERING NOT INCLUDED IN OTHER CATEGORIES
G CODES
MATHEMATICS, COMPUTERS, INFORMATION SCIENCE, MANAGEMENT, LAW, MISCELLANEOUS
NONLINEAR PROBLEMS
THREE-DIMENSIONAL CALCULATIONS
TRAVELLING WAVE TUBES
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Summary: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.
ISSN:0730-9244
2576-7208