Siewert, F.; Reininger, R.; Rübhausen, M.A.: A KB-Focusing Mirror Pair for a VUV-Raman Spectrometer at FLASH - Mirror Metrology and Ray Tracing Results. In: Garrett, R... [Ed.] : SRI 2009 : the 10th International Conference on Synchrotron Radiation Instrumentation ; Melbourne, Australia, 27 September - 2 October 2009Melville, NY: American Inst. of Physics, 2010 (AIP conference proceedings ; 1234). - ISBN 978-0-7354-0782-4, p. 752-755
Abstract:
Abstract. A plane mirror and two strongly curved plane elliptical mirrors comprising the refocusing system downstream the plane grating monochromator at FLASH in DESY have been characterized with the Nanometer Optical Component Measuring Machine at the BESSY-II Optics Laboratory of the Helmholtz Zentrum Berlin. Based on the measurement results the two elliptical cylinders were optimized by deterministic surface finishing technology (Ion Beam Finishing). The expected focusing performance was verified by ray tracings after each ion beam finish iteration using the measured topography results. Keywords: X-ray optics, synchrotron instrumentation, metrology, FEL.