Open AccessDesign of a multilayer‐based collimated plane‐grating monochromator for tender X‐ray range
Author(s) -
Yang Xiaowei,
Wang Hongchang,
Hand Matthew,
Sawhney Kawal,
Kaulich Burkhard,
Kozhevnikov Igor V.,
Huang Qiushi,
Wang Zhanshan
Publication year - 2017
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577516017884
Subject(s) - collimated light , optics , grating , monochromator , materials science , diffraction , x ray optics , diffraction efficiency , synchrotron radiation , diffraction grating , range (aeronautics) , plane mirror , optoelectronics , physics , x ray , laser , wavelength , composite material
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.