title: Wave-optical evaluation of interference fringes and wavefront phase in a hard-x-ray beam totally reflected by mirror optics.
abstract: The intensity flatness and wavefront shape in a coherent hard-x-ray beam totally reflected by flat mirrors that have surface bumps modeled by Gaussian functions were investigated by use of a wave-optical simulation code. Simulated results revealed the necessity for peak-to-valley height accuracy of better than 1 nm at a lateral resolution near 0.1 mm to remove high-contrast interference fringes and appreciable wavefront phase errors. Three mirrors that had different surface qualities were tested at the 1 km-long beam line at the SPring-8/Japan Synchrotron Radiation Research Institute. Interference fringes faded when the surface figure was corrected below the subnanometer level to a spatial resolution close to 0.1 mm, as indicated by the simulated results.
authors.affiliation: Department of Precision Science and Technology, Graduate School of Engineering, Osaka University, Yamada-oka 2-1, Suita, Osaka 565-0871, Japan. yamauchi@prec.eng.osaka-u.ac.jp
authors.forename: Kazuto
authors.initials: K
authors.lastname: Yamauchi
authors.forename: Kazuya
authors.initials: K
authors.lastname: Yamamura
authors.forename: Hidekazu
authors.initials: H
authors.lastname: Mimura
authors.forename: Yasuhisa
authors.initials: Y
authors.lastname: Sano
authors.forename: Akira
authors.initials: A
authors.lastname: Saito
authors.forename: Katsuyoshi
authors.initials: K
authors.lastname: Endo
authors.forename: Alexei
authors.initials: A
authors.lastname: Souvorov
authors.forename: Makina
authors.initials: M
authors.lastname: Yabashi
authors.forename: Kenji
authors.initials: K
authors.lastname: Tamasaku
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Ishikawa
authors.forename: Yuzo
authors.initials: Y
authors.lastname: Mori