Abstract
We report a high-resolution and high-efficiency monochromator with energy resolution, ΔE/E∼2.08*10-7, utilizing a hard x-ray single-mode Fabry-Perot (FP) resonator at Laue incidence at 14.4388keV. Instead of using multiple-crystal diffraction via several asymmetric-cut crystals, a 3meV single-peak is generated from the interference of a Si-made two-plate cavity with a thickness of 70μm and a gap of 45μm, where a (0-40) Laue reflection is used to excite the backreflection (12 4 0) for the enhancement of the FP efficiency. Due to the large angular acceptance of (12 4 0) and (0-40), the energy tunability can be achieved by changing the incident angle into the resonator. The application of x-ray resonators at Laue incidence as a monochromator can be further implemented to x-ray optics.
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