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Efficiency calibrations of cylindrically bent transmission crystals in the 20 to 80 keV x-ray energy range

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Abstract

Two quartz (10–11) crystals were cylindrically bent to a 25.4cm radius of curvature and were mounted in identical Cauchois-type transmission spectrometers, and the crystal diffraction efficiencies were measured to 5% absolute accuracy using narrow bandwidth x-ray source fluences in the 20 to 80keV energy range. The measured integrated reflectivity values were compared to calculations performed using a computational model that accounts for the diffraction geometry of the bent transmission crystal. These crystal calibrations enable the accurate measurement of absolute hard x-ray emission levels from laser-produced plasmas and other laboratory sources.

© 2011 Optical Society of America

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