Abstract
A two stage FEL experiment is under development at the UCSB FEL facility. The experiment uses a high quality 20 A electron beam generated by an electrostatic accelerator with beam recovery. A new gun and collector were developed for this experiment. The first stage, with a helical undulator, will produce a saturation flux of the order of 10 7 W/cm 2 of 703 μm radiation. This will be the pump for the second stage where light of 1.08 μm will be generated.
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