Open AccessX‐ray collimation by the parabolic cylinder mirror in SPring‐8/BL29XUL
Author(s) -
Takei Dai,
Kohmura Yoshiki,
Senba Yasunori,
Ohashi Haruhiko,
Tamasaku Kenji,
Ishikawa Tetsuya
Publication year - 2016
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/s1600577515019797
Subject(s) - collimated light , optics , physics , plane mirror , parabolic reflector , ray tracing (physics) , cylinder , flux (metallurgy) , divergence (linguistics) , parabolic cylinder function , curved mirror , photon , spring 8 , photon flux , plane (geometry) , beam (structure) , geometry , laser , materials science , parabolic partial differential equation , mathematics , linguistics , philosophy , nonlinear system , quantum mechanics , beamline , metallurgy
A combination of plane and threefold‐shape X‐ray mirrors was installed in SPring‐8 BL29XUL. The second mirror has parabolic cylinder surfaces that collimate X‐rays in the vertical direction. A performance test was conducted, yielding highly collimated 8 keV photon beams with an effective angular divergence of 0.4 µrad, below only 5% of that of the original beams. The double‐mirror system preserved 70% of the total incident flux and nearly tripled the flux density at 988 m from the light source. The values of the observations were almost similar to those of our ray‐tracing simulation. Based on the results a discussion of future prospects of the mirror system is included.