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This work reports some initial results of a 2-D electron gun design code (XMGUN) based on the finite-element method (FEM). Using the Galerkin weak formulation, the nodal analysis, and the first-order elements, the Poisson equation was solved for the electron gun electrostatic potential. The nonrelativistic particle paths were numerically calculated by a fourth-order Runge-Kutta method. An iterative...
The design for a S-band multiple-beam klystron with field emitter is presented. The klystron will operate on 3.3 GHz, peak power 3 kW, average power 50 W. Calculation of the electron trajectories and circuit design are described.
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