2007: Pulse Generators with Nanosecond Leading Edge Duration based on TPI-Type Pseudospark Switches for FEL Complex

For FEL (Free Electron Laser) complex used at the Duke University, pulse generators (kickers) of Injection, Extraction and Generator of injection into a big ring have been developed and built. As fast switches TPI-type thyratrons (PSS pseudospark switches) have been employed. In contrast to other pseudospark switches the TPI-thyratrons are capable of operating in circuits with grounded cathode, which offers lifetimes up to 20 000 hours. The thyratrons can be considered as alternative to wellknown switches, including hot cathode hydrogen thyratrons and up-to-date power solid state switches, whereas being more compact and cost-effective. The absence of hot cathode provides for turn-on time of the TPIs about 3÷5 ns in the modes with thousands-amperes peak currents and sub-nanosecond jitter. The results of over 1.5 years of the pulse generators service are presented.