uCSB FEL experimental program

Status report of the uCSB FEL experimental programLuis R. Elias and Gerald J. RamianQuantum institute, University of California, Santa Barbara CA 93106AbstractA beam recovery efficiency of 99.4% has been demonstrated with a 2.5 MeV, 1.2 ampereelectrostatic accelerator electron beam system developed at UCSB to drive single -stage andtwo -stage free -electron lasers. Beam quality tests carried out at 10 keV and 2.5 MeV showthat the measured transverse beam emittance agrees well with the theoretical limit imposed