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- Title
Design of a multilayer-based collimated plane-grating monochromator for tender X-ray range.
- Authors
Huang, Qiushi; Wang, Zhanshan; Yang, Xiaowei; Wang, Hongchang; Hand, Matthew; Sawhney, Kawal; Kaulich, Burkhard; Kozhevnikov, Igor V.
- Abstract
Collimated plane-grating monochromators (cPGMs), consisting of a plane mirror and plane diffraction grating, are essential optics in synchrotron radiation sources for their remarkable flexibility and good optical characteristics in the soft X-ray region. However, the poor energy transport efficiency of a conventional cPGM (single-layer-coated) degrades the source intensity and leaves reduced flux at the sample, especially for the tender X-ray range (1-4 keV) that covers a large number of K- and L-edges of medium- Z elements, and M-edges of high- Z elements. To overcome this limitation, the use of a multilayer-based cPGM is proposed, combining a multilayer-coated plane mirror with blazed multilayer gratings. With this combination, the effective efficiency of cPGMs can be increased by an order of magnitude compared with the conventional single-layer cPGMs. In addition, higher resolving power can be achieved with improved efficiency by increasing the blaze angle and working at higher diffraction order.
- Subjects
SYNCHROTRON radiation; COLLIMATED light; MONOCHROMATORS; X-ray optics; DIFFRACTION gratings
- Publication
Journal of Synchrotron Radiation, 2017, Vol 24, Issue 1, p168
- ISSN
0909-0495
- Publication type
Article
- DOI
10.1107/S1600577516017884