Low voltage ultra-compact W-band Klystron

The SLAC National Accelerator Laboratory Technology Innovation Directorate is developing a 2 kW, 95 GHz ultra-compact continuous wave sheet beam klystron aiming to demonstrate 50% efficiency and weight of under 15 lbs. The design utilizes high current density cathodes, periodic cusped magnetic focusing for 99% beam transmission, and a multi-stage depressed collector to achieve device metrics. Beam stick construction is currently underway with operation slated to occur early in the year, the results of which will be used to validate beam transmission simulations. Construction of the interaction cavities is proceeding in parallel to ensure appropriate resolution and surface roughness is achieved.