Fig.5-28 Schematics of (a) a gold-coated grating and (b) an aperiodic W/B4C multilayer grating. (c) The measured diffraction efficiencies of both gratings are plotted as functions of photon energy at a constant angle of incidence

$Fig.5-28　Schematics of (a) a gold-coated grating and (b) an aperiodic W/B4C multilayer grating. (c) The measured diffraction efficiencies of both gratings are plotted as functions of photon energy at a constant angle of incidence$

Fig.5-28　Schematics of (a) a gold-coated grating and (b) an aperiodic W/B₄C multilayer grating. (c) The measured diffraction efficiencies of both gratings are plotted as functions of photon energy at a constant angle of incidence

The W/B₄C multilayer grating shows uniformly high diffraction efficiency across the measured energy range.

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