Evaluation of TESLA code for filter-loaded output cavity feature in a Klystron

Recently a new feature was added to the NRL 2.5D Klystron code called TESLA in collaboration with CPI. The feature involves modeling a klystron with a filter-loaded output cavity. The latter replaces a conventional unloaded single-gap output cavity in a klystron when wide bandwidth is needed. The feature was first evaluated by comparing with cold test data for a stand-alone output cavity. Later the full-blown TESLA predictions were compared with CPI 1-D code for drive curve and band-pass curve.