Aa. Varfolomeev et al., MOCK-UP OF THE FOCUSING UNDULATOR FOR THE SLAC X-RAY FEL PROJECT, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 358(1-3), 1995, pp. 70-71
A small prototype of the undulator requested for the SLAG X-ray FEL pr
oject was designed and manufactured. Experimental results on the magne
tic fields obtained with the five period model show that the hybrid sc
heme using side magnet arrays is very promising. It can provide the sp
ecified magnetic field profiles in a small area near the undulator axi
s, focusing fields are easily adjustable, and the construction is comp
act.