We report on the use of multilayer Laue lenses to focus the intense X-ray Free Electron Laser (XFEL) beam at the European XFEL to a spot size of a few tens of nanometers. We present the procedure to align and characterize these lenses and discuss challenges working with the pulse trains from this unique x-ray source.
Beam conditioning CRL transfocator optics implemented at the Materials Imaging and Dynamics (MID) instrument of the European XFEL are described. Two CRL transfocator units are equipped with beryllium parabolic refractive lenses of large radii of curvature to provide collimated or focused x-ray beam in the 5–25 keV photon energy range. Optical schemes, design and performance of the CRL units, which were recently installed at the SASE2 photon tunnels, are presented.
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