Open AccessDesign of an 18 m spherical‐grating monochromator at UVSOR
Author(s) -
Yoshida Hiroaki,
Mitsuke Koichiro
Publication year - 1998
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s090904959701710x
Subject(s) - monochromator , beamline , optics , grating , photon flux , physics , photon energy , photon , range (aeronautics) , materials science , beam (structure) , wavelength , composite material
An 18 m spherical‐grating monochromator with high resolution and high photon flux has been developed at the bending‐magnet beamline BL2B2 of the UVSOR facility in the Institute for Molecular Science. The monochromator is designed to cover the energy range 20–200 eV by using three gratings: G1 (2400 lines mm −1 , R = 18 m) at 80–200 eV; G2 (1200 lines mm −1 , R = 18 m) at 40–100 eV; G3 (2400 lines mm −1 , R = 9.25 m) at 20–50 eV. A resolving power of 5000 and a photon flux of more than 10 10 photons s −1 are expected at a 100 mA ring current. A small including angle of 140° is adopted for G3 and two plane mirrors coated with aluminium are located between G3 and the exit slit as optical filters. These geometrical devices may contribute significantly to the reduction of the high‐order lights.