@article{oai:repo.qst.go.jp:00048019,
 author = {Ruiz-Lopez, M. and Faenov, A. and Pikuz, T. and Ozaki, N. and Mitrofanov, A. and Albertazzi, B. and Hartley, N. and Matsuoka, T. and Ochante, Y. and Tange, Y. and Yabuuchi, T. and Habara, T. and A., Tanaka K. and Inubushi, Y. and Yabashi, M. and Nishikino, M. and Kawachi, T. and Pikuz, S. and Ishikawa, T. and Kodama, R. and 錦野 将元 and 河内 哲哉},
 issue = {1},
 journal = {Journal of Synchrotron Radiation},
 month = {Jan},
 note = {Direct metrology of coherent short-wavelength beamlines is important for obtaining operational beam characteristics at the experimental site. However, since beam-time limitation imposes fast metrology procedures, a multi- parametric metrology from as low as a single shot is desirable. Here a two- dimensional (2D) procedure based on high-resolution Fresnel diffraction analysis is discussed and applied, which allowed an efficient and detailed beamline characterization at the SACLA XFEL. So far, the potential of Fresnel diffraction for beamline metrology has not been fully exploited because its high- frequency fringes could be only partly resolved with ordinary pixel-limited detectors. Using the high-spatial-frequency imaging capability of an irradiated LiF crystal, 2D information of the coherence degree, beam divergence and beam quality factor M2 were retrieved from simple diffraction patterns. The developed beam metrology was validated with a laboratory reference laser, and then successfully applied at a beamline facility, in agreement with the source specifications.},
 pages = {196--204},
 title = {Coherent X-ray beam metrology using 2D high-resolution Fresnel-diffraction analysis},
 volume = {24},
 year = {2017}
}