Abstract:
n this paper, we report measured parameters of the OK-4 FEL
driven by the Duke storage ring. The OK-4
FEL was being operated continuously for 2 yr in the broad
wavelength range for user applications utilising
spontaneous and coherent XUV and UV radiation as well as
Compton back-scattered -rays in the range of
2-58 MeV. During this time, the OK-4 FEL lased in the range
from 193.7 to about 730 nm using five sets of
mirrors and electron beam energies from 240 to 800 MeV. Our
predictions for the OK-4 FEL are compared
with measured performance, both in the CW and in the giant
pulse mode. We discuss our future plans for the
OK-4 FEL operation as well as the construction and
commissioning of the OK-5 FEL with helical wigglers.
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