Developing Sheet Beam Klystron Simulation Capability in AJDISK

AJDISK is a 1-D large signal klystron simulator developed at Stanford Linear Accelerator Center. A brief discussion of AJDISK´s simulation algorithm is given and fully developed to show how AJDISK was extended to enable sheet beam klystron simulations. The primary requirement for extending disk simulators to sheet beam simulators is a space charge equation. Therefore, the electric field due to an infinitely thin plate of charge (infinitely thin in the direction of propagation) in a rectangular drift tube is derived. The derivation is extended to a 2-D space charge equation in which the plate is split into a series of rods with varying positions in y. The derived equations are compared with the numerical simulations and measurement.