Design of a multilayer-based collimated plane-grating monochromator for tender X-ray range

DOI: 10.1107/S1600577516017884

Authors: Xiaowei Yang (Tongji University) , Hongchang Wang (Diamond Light Source) , Matthew Hand (Diamond Light Source) , Kawal Sawhney (Diamond Light Source) , Burkhard Kaulich , Igor V. Kozhevnikov (Shubnikov Institute of Crystallography of Federal Scientific Research Centre `Crystallography and Photonics' of Russian Academy of Sciences) , Qiushi Huang (Tongji University) , Zhanshan Wang (Tongji University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Synchrotron Radiation , VOL 24 , PAGES 168 - 174

State: Published (Approved)
Published: January 2017

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.

Journal Keywords: X-ray optics; monochromator; diffraction grating; multilayer

Subject Areas: Technique Development


Technical Areas: Optics

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