Design of the laser-driven RF electron gun for the BNL accelerator test facility

The BNL electron gun will incorporate a laser-driven photocathode in the wall of a 1/sup 1///sub 2/ cell RF cavity operated at a peak field of 100 MV/m. Pulses of 4.5-MeV energy, 5-ps width, and 1-nC charge will be produced with very little emittance growth due to the effects of space-charge and nonlinear RF fields. The design of the gun was aided by extensive computer simulation.<
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