S. Okuma et al., FEL BEAM SHARING SYSTEMS FOR 8 USERS-STATIONS AT THE FELI, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 375(1-3), 1996, pp. 654-656
Au-coated mirrors with fan-shaped holes are used instead of a beam spl
itter such as a Ge plate, to share FEL beams to the diagnostics room a
nd following eight user's stations, since the maximum diameter of FEL
beams is 63.7 mm in the wavelength range of 1-20 mu m and an opening a
ngle, the number and position of the fan-shaped holes can change a sha
ring ratio of delivering FEL average power for user's stations.