Abstract
An overview of the research program and recent experimental results from the SUNSHINE (Stanford University short intense electron source) facility will be presented and discussed. This facility consists of an rf-gun and a magnetic bunch compressor followed by a 30 MeV linear accelerator and associated diagnostic instrumentation. The goal of this research activity is to produce sub picosecond electron pulses, study limitations and use those bunches to generate coherent far infrared radiation or for single pass free electron laser development. High intensity electron bunches with a peak current of 298 A at a bunch length of 70 μm rms or 235 fs rms have been produced at a microbunch charge of 0.17 nC while the shortest bunches reached so far last about 100 fs rms at about 10% of maximum intensity. The experimental setup, numerical simulations for bunch compression, sub picosecond bunch length measurements and limitations on achievable short bunches will be discussed.
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