Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 710, Issue -, Pages 139-142Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nima.2012.10.094
Keywords
X-ray free electron laser; X-ray mirror; Double crystal monochromator; Stability; Damage; Beam image
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Beamline mirrors and a monochromator were developed as key optical devices for the Japanese XFEL facility, SPring-8 Angstrom Compact Free Electron Laser (SACLA). The optics were designed for transporting extremely intense, transversely coherent XFEL light to the experimental stations. The mirror system delivers a pink beam with high intensity and an energy range below 15 key, while the monochromator with Si (1 1 1) covers wider energy range of 4-30 keV with 0.01% bandwidth. For realizing high stability and contamination-free environment, the mechanics of these optical components were designed to have high stiffness with ultra-high vacuum (UHV) compatibility. After 100 days of operation, no radiation damage was observed on the mirror surfaces. (c) 2012 Elsevier B.V. All rights reserved.
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