Cus. Larsson et al., FIRST RESULTS FROM THE HIGH-RESOLUTION XUV UNDULATOR BEAMLINE BW3 AT HASYLAB, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 337(2-3), 1994, pp. 603-608
Initial results from the XUV undulator beamline at the 4.5 GeV storage
ring DORIS are reported. The beamline consists of three different und
ulators mounted on a revolver type device and a modified SX-700 plane
grating monochromator with a spherical focusing mirror. It covers the
spectral range from 50-2000 eV with excellent spectral resolution and
high photon flux. In the energy range 400 eV to 1 keV a spectral resol
ution estimated to 4500-9000 is obtained which is slightly better than
the best values previously reported. In the energy range 50-1700 eV t
he photon flux is of the order of 10(11)-10(13)/s for a resolving powe
r of a thousand normalized to a ring current of 100 mA. A study of the
photofragmentation of H2O following K-shell excitation energetically
close to the oxygen K-edge at similar to 540 eV demonstrates the excel
lent performance of the beamline, in particular for the investigation
of secondary processes where a high flux is necessary.