Upgrade and recent performance of 24-m SGM at the Photon Factory

Journal Article · Wed Jan 01 04:00:00 EST 1992 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1143061· OSTI ID:5411057

Masui, S; Shigemasa, E; Yagishita, A ^[1]

---

1. Photon Factory, National Laboratory for High Energy Physics, Tsukuba-shi, Ibaraki-ken 305 (Japan)

Performance of a 24-m spherical grating monochromator is described. This beamline is composed of a prefocusing toroidal mirror, a spherical grating monochromator with a movable exit slit and refocusing mirrors. With a 600-l/mm grating and 50-{mu}m slit openings, the resolving power of 5700 was achieved at 45 eV in good agreement with the theoretical prediction. The second-order contribution was estimated from Ne 2p photoelectron yield to be less than 40% of the first order for the spectral range of 30--90 eV and less than 11% for that of 90--160 eV with the grating of 600 l/mm. As to the grating of 1800 l/mm, it was estimated to be less than 31% for the spectral range of 80--90 eV and less than 11% for that of 90--150 eV. A photon flux of {congruent}5{times}10{sup 12} photons/s is obtainable at 70 eV for the grating of 600 l/mm and that of {congruent}10{sup 12} photons/s is obtainable at 150 eV for the grating of 1800 l/mm.

• OSTI ID: 5411057
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 63:1; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
430303* -- Particle Accelerators-- Experimental Facilities & Equipment
440600 -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
DESIGN
FOCUSING
GRATINGS
KEK PHOTON FACTORY
MIRRORS
MONOCHROMATORS
PERFORMANCE
RADIATION SOURCES
SYNCHROTRON RADIATION SOURCES