Lawrence Berkeley National Laboratory
An injector for the proposed Berkeley Ultrafast X-Ray Light
- Author(s): Lidia, Steven
- Corlett, John
- Pusina, Jan
- Staples, John
- Zholents, Alexander
- et al.
Berkeley Lab has proposed to build a recirculating linac based X-ray source for ultra-fast dynamic studies . This machine requires a flat electron beam with a small verti calemittance and large x/y emittance ratio to allow for compression of spontaneous undulator emission of soft and hard x-ray pulses, and a low-emittance, round electron beam for coherent emission of soft x-rays via the FEL process based on cascaded harmonic generation . We propose an injector system consisting of two high gradient high repetition rate photo cathode guns  (one for each application), a ~;120 MeV super conducting linear accelerator, a 3rd harmonic cavity for linearization of the longitudinal phase space, and a bunch compressor. We present details of the design and the results of particle tracking studies using several computer codes.