Figure | Multilayer-coated grating-based spectrometer. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure | Multilayer-coated grating-based spectrometer.

Caption

Figure | Multilayer-coated grating-based spectrometer. (a) Illustrations of various dispersive optics - single-layer coated grating, multilayer-coated grating, and crystal optics used for the soft, tender and hard X-ray range, respectively. (b) Photon-energy-dependent diffraction efficiency of various dispersive optics. The SLG (1500 lines/mm groove density, 0.68° blaze angle and 2.72° anti-blaze angle) employs a 30-nm Pt coating under fixed 2° grazing incidence angle. The MLG (identical groove density) incorporates Cr/C multilayers (d-spacing = 5.90 nm), with grazing angles optimized to 3.80°, 2.11°, 1.37°, 0.97° and 0.71° for 1500, 2500, 3500, 4500 and 5500 eV, respectively. Si(111) crystal operates at 23.30°, 19.24°, and 16.41° grazing angles for 5000, 6000, and 7000 eV, respectively. (c) Schematic of the RIXS spectrometer based on a spherical varied-line-spacing multilayer (SVLSG-ML) grating, with a comparison of the measured instrumental energy resolution between the SVLSG-ML (red) and a single-layer (SVLSG-SL, blue) grating at 2838 eV.

Credit

Ke-Jin Zhou et al.

Usage Restrictions

Credit must be given to the creator.

License

CC BY

Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.