Performance of the gas-phase photochemistry beamline BL6 at HiSOR

Abstract

A compact varied-line-spacing plane grating monochromator has been constructed at the bending magnet beamline BL6 of the HiSOR facility in Hiroshima University. The monochromator covers the energy range of 200–1200 eV with two gratings. The performance of the monochromator is evaluated from total-ion yield spectra of Ar, N 2, and Ne. The obtained resolving powers ( E / Δ E ) are ∼ 5000 (Ar L-edge), ∼ 6400 (N K-edge), and ∼ 4600 (Ne K-edge). High mass resolution electron–ion–ion coincidence apparatus is mounted at an end station of the beamline to investigate ionic dissociation processes of core-excited complex organic molecules. Multiple fragmentation processes from core-excited ammonia (NH 3) and ionic dissociation processes from core-excited benzyl alcohol (C 6H 5CH 2OH) are also discussed.