Abstract
We have constructed the first working model of a novel diffraction geometry for the high-resolution monochromatization of hard (5–30 keV) synchrotron radiation. The monochromator has an energy bandpass of 6.7 meV FWHM and an angular acceptance of 22 μrad (4.5 arcseconds) for 14.4 keV X rays - an energy resolution ΔE E of 4.6 × 10 −7. With a second set of crystals, an energy bandpass of 23 meV FWHM and an angular acceptance of 7 μrad was achieved for 23.8 keV photons. The performance of the monochromator has been verified, in a nearly ideal measurement, using nuclear-fluorescent X rays with an energy bandwidth on the order of 10 neV.
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