Wave-optical evaluation of interference fringes and wavefront phase in a hard-x-ray beam totally reflected by mirror optics |
| |
Authors: | Yamauchi Kazuto Yamamura Kazuya Mimura Hidekazu Sano Yasuhisa Saito Akira Endo Katsuyoshi Souvorov Alexei Yabashi Makina Tamasaku Kenji Ishikawa Tetsuya Mori Yuzo |
| |
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 |
| |
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. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|