title: Preface: The 5th International Workshop on X-ray Mirror Design, Fabrication, and Metrology.
abstract: Recent developments in synchrotron storage rings and free-electron laser-based x-ray sources with ever-increasing brightness and coherent flux have pushed x-ray optics requirements to new frontiers. This Special Topic gathers a set of articles derived from a subset of the key presentations of the International Workshop on X-ray Mirrors Fabrication (IWXM-2015) and Metrology held at Lawrence Berkley National Laboratory, Berkeley, California, USA, July 14-16, 2015. The workshop objective was to report on recent progress in x-ray synchrotron radiation mirrors fabrication as well as on new developments in related metrology tools and methods.
authors.affiliation: Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, USA.
authors.forename: Lahsen
authors.initials: L
authors.lastname: Assoufid
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA.
authors.forename: Kenneth
authors.initials: K
authors.lastname: Goldberg
authors.affiliation: Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA.
authors.forename: Valeriy V
authors.initials: VV
authors.lastname: Yashchuk