Design of a multilayer-based collimated plane-grating monochromator for tender X-ray range.
作者： Xiaowei Yang , Hongchang Wang , Matthew Hand , Kawal Sawhney , Burkhard Kaulich
DOI: 10.1107/S1600577516017884
关键词: Materials science 、 X-ray optics 、 Diffraction grating 、 Collimated light 、 Grating 、 Synchrotron radiation 、 Blazed grating 、 Plane mirror 、 Optics 、 Monochromator 、 Optoelectronics
摘要: Collimated plane-grating monochromators (cPGMs), consisting of a plane mirror and diffraction grating, are essential optics in synchrotron radiation sources for their remarkable flexibility good optical characteristics the soft X-ray region. However, poor energy transport efficiency conventional cPGM (single-layer-coated) degrades source intensity leaves reduced flux at sample, especially tender range (1–4 keV) that covers large number K- L-edges medium-Z elements, M-edges high-Z elements. To overcome this limitation, use multilayer-based is proposed, combining multilayer-coated with blazed multilayer gratings. With combination, effective cPGMs can be increased by an order magnitude compared single-layer cPGMs. In addition, higher resolving power achieved improved increasing blaze angle working order.
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