# Abstracts

## XX International Linac Conference

## THA06 (Poster)

**Presenter: **Valery Dolgashev (SLAC)

** email: **dolgash@slac.stanford.edu

**Status: **Complete

**FullText: **
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**Eprint:** physics/0008177
# 2D Simulation of High-Efficiency Cross-Field RF Power
Sources

V.A. DOLGASHEV, S.G. TANTAWI (SLAC)

An efficient method for frequency domain analysis of 2D cross-field
devices is presented. This work was done to analyze and design high efficiency
magnetrons. Arbitrary device-geometries are described by a piecewise planar boundary.
The method is based on an expansion of the electromagnetic fields into a set of
cavity eigenmodes. In order to obtain the self-consistent solution, iterations are
performed until the energy balance is reached. A boundary integration method is used
to take into account space charge effects. The cavity eigenmodes are found by a
method based on the scattering matrix technique. The geometry is divided into
regions. The boundary contour mode-matching method is used to obtain the scattering
matrices for each region. Electromagnetic fields in each region are expanded into a
series of plane waves. Due to choice of plane wave expansion, all integration in the
mode-matching process is carried out analytically. The scattering matrices of the
regions are combined using a generalized scattering matrix technique to obtain the
scattering matrix for the full geometry, and then the eigenmode resonance frequencies
and the fields. Periodic boundary condition is used for the field calculation and the
particle tracking. Simulation results and comparison with experimental data are
presented.

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