title: X-ray collimation by the parabolic cylinder mirror in SPring-8/BL29XUL.
abstract: 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.
authors.affiliation: RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan.
authors.forename: Dai
authors.initials: D
authors.lastname: Takei
authors.affiliation: RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan.
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Kohmura
authors.affiliation: JASRI, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan.
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Senba
authors.affiliation: JASRI, Kouto 1-1-1, Sayo, Hyogo 679-5148, Japan.
authors.forename: Haruhiko
authors.initials: H
authors.lastname: Ohashi
authors.affiliation: RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan.
authors.forename: Kenji
authors.initials: K
authors.lastname: Tamasaku
authors.affiliation: RIKEN SPring-8 Center, 1-1-1 Kouto, Sayo, Hyogo 679-5148, Japan.
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Ishikawa
keywords: X-ray optics; beam divergence; beamline development