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Collaborative development of diffraction-limited beamline optical systems at US DOE light sources

  • Author(s): Goldberg, KA
  • Wojdyla, A
  • Bryant, D
  • Chao, W
  • Cocco, D
  • Hardin, C
  • Morton, D
  • Ng, ML
  • Lee, L
  • Assoufid, L
  • Grizolli, W
  • Shi, X
  • Kearney, SP
  • Wojcik, M
  • Shvyd'Ko, Y
  • Shu, D
  • Idir, M
  • Huang, L
  • et al.
Abstract

© 2019 SPIE. An ongoing collaboration among four US Department of Energy (DOE) National Laboratories has demonstrated key technology prototypes and software modeling tools required for new high-coherent flux beamline optical systems. New free electron laser (FEL) and diffraction-limited storage ring (DLSR) light sources demand wavefront preservation from source to sample to achieve and maintain optimal performance. Fine wavefront control was achieved using a novel, roomtemperature cooled mirror system called REAL (resistive element adjustable length) that combines cooling with applied, spatially variable auxiliary heating. Single-grating shearing interferometry (also called Talbot interferometry) and Hartmann wavefront sensors were developed and used for optical characterization and alignment on several beamlines, across a range of photon energies. Demonstrations of non-invasive hard x-ray wavefront sensing were performed using a thin diamond single-crystal as a beamsplitter.

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