R. Zhang et al., A MILLIMETER-WAVE FEL DRIVEN BY A PHOTOCATHODE RF LINAC, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 341(1-3), 1994, pp. 67-71
We present the design of a millimeter wave FEL based on the UCLA photo
cathode rf linac. The linac energy can be varied between 5 and 18 MeV.
The electron pulse duration is 2 ps FWHM, with a peak current exceedi
ng 150 A. The FEL is designed to operate in the high gain Compton regi
me, controlling the slippage with the propagating radiation in a waveg
uide. The design will permit the exploration of the basic FEL physics
in this regime, including the exploration of saturation and lethargy i
n the superradiant and steady state regime.