Construction of constant-deviation constant-length spherical grating monochromator at UVSOR

Abstract

A constant-deviation constant-length spherical grating monochromator was constructed at the bending-magnet beamline 8B1 of the UVSOR. The monochromator has a simple scanning mechanism with a fixed position of the entrance and exit slits, as well as fixed directions of incident and exit photon beams. The monochromator was designed to cover the photon energy of 31–620 eV with three interchangeable laminar gratings (1080 lines/mm: R=15 m, 540 lines/mm: R=15 m, 360 lines/mm: R=7.5 m). All gratings are original gratings fabricated on synthetic quartz substrates and coated with Au. The resolving power evaluated by ray tracing at the lowest energy of each grating with 10 μm slit width is ∼4400 for two high energy gratings and ∼7000 for a low energy grating. In the preliminary performance check, it was found that the output spectrum of the monochromator with G1 grating extends up to 870 eV with resolving power of ∼4000 at 400 eV with 10 μm slits.

Molecular Size Effect on the Site Dependent Photofragmentation of N and O K-Shell Excited CH3CO(CH2)nCN (n = 0−3)

“…Synchrotron radiation (SR) from UVSOR at the Institute for Molecular Science (IMS) was dispersed using a constant-deviation constant-length spherical grating monochromator, in which three gratings with different grooves were installed to obtain 30−700 eV photons . An Al thin filter was used in order to reduce the scattered stray light.…”

Photodissociation of Ozone in the K Edge Region

“…Experiments were performed on the BL8B1 beamline at the UVSOR facility of the Institute for Molecular Science (IMS). Synchrotron radiation (SR) was monochromated by using a 15-m constant-deviation grazing incidence monochromator …”

“…Synchrotron radiation (SR) was monochromated by using a 15-m constant-deviation grazing incidence monochromator. 13 The energy resolution for photoabsorption measurement was E/∆E ) 2000-4000 under the typical conditions with the slit widths 10 µm. High photon flux, however, was required to obtain the reliable signal-noise ratio, and hence the slit widths of the monochromator were kept at 50 µm during the experiment, which provided ∆E ≈ 1 eV at hν ) 400 eV.…”

Near-Edge X-ray Absorption Fine Structure of Hard Carbon Film Formed by Gas Cluster Ion Beam Assisted Deposition

“…The NEXAFS measurement was performed at the BL8B1 stage of UVSOR in the Institute for Molecular Science [4]. The synchrotron radiation provided by the 0.75-GeV electron storage ring was dispersed by a constant-deviation constant-length spherical grating monochromator and was perpendicularly irradiated to the sample film surface.…”