Beamlines List
BL6U Variable-Included-Angle VLS-PGM for Molecular Soft X-Ray Spectroscopy
▼Description
The beamline BL6U equipped with a variable-included-angle Monk-Gillieson mounting monochromator with a
varied-line-spacing plane grating was constructed for various spectroscopic investigations requiring high-brilliance
soft X-rays in a gas phase and/or on solids. Through a combination of undulator radiation and sophisticated
monochromator design (entrance slit-less configuration and variable-included-angle mechanism), using a single
grating, the monochromator can cover the photon energy ranging from 30 to 500 eV, with resolving power of
greater than 10000 and photon flux of more than 1010 photons/s. Figure 1 shows an example of the
monochromator throughput spectra measured using a Si photodiode, with the exit-slit opening set at 30 μm, which
corresponds to the theoretical resolving power of 10000 at 80 eV.
The end station is equipped with an electron energy analyzer for angle-resolved photoelectron spectroscopy.
| Fig. 1. Throughput spectra of the BL6U monochromator at various included angles. | Fig. 2. Photo of BL6U |
▼Technical Data
| Monochromator | Variable-included-angle Varied-line-spacing Plane Grating Monochromator |
| Energy range | 40-500 eV |
| Resolution | E / ΔE > 10000 (at maximum) |
| Experiments | High-resolution soft X-ray spectroscopy (mainly photoelectron spectroscopy for gaseous and solid targets) |
