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27 March 2022 Microfocusing compound refractive lenses design for XFEL spectroscopy applications
Xiaowei Yang, Yajun Tong
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Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121691X (2022) https://doi.org/10.1117/12.2622443
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China
Abstract
Compound refractive lenses (CRL) are broadly used at X-ray free-electron laser (XFEL) facilities for they are less sensitive to angular vibrations. XFEL spectroscopy endstations need long-range tunable photon energy and separately controlled beam size in the vertical and horizontal direction. However, the focal distance of CRL lenses is photon-energy dependent while the sample positions of XFEL endstations are fixed. Transfocators are thus proposed in which CRL lenses are grouped and can be inserted in and removed from the beamline, allowing the fast switch between different photon energies and spot sizes. To individually adjust the focal spot size in two dimensions, 1D and 2D compound refractive lenses are combined.
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Xiaowei Yang and Yajun Tong "Microfocusing compound refractive lenses design for XFEL spectroscopy applications", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121691X (27 March 2022); https://doi.org/10.1117/12.2622443
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KEYWORDS
Lenses
Spectroscopy
X-rays
Free electron lasers
Refractive index
X-ray optics
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