29 July 2010 Fresnel lens arrays for x-ray imaging spectroscopy
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Arrays of achromatic Fresnel lenses are investigated for future high-resolution X-ray imaging missions. Unlike single-focus instruments, parallel arrangements of numerous tiny telescopes provide an easy and natural approach to spectroscopic observations in several energy bands, at an unprecedented short focal length of few 103 m. We suggest an optimized design with an angular resolution around 1 mas between 5 and 10 keV and analyze its optical capabilities as well as issues like the background problem which affects the achievable signal-to-noise ratio. An astronomical simulation is performed on the sun-like star Capella.
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Christoph Braig, Christoph Braig, Peter Predehl, Peter Predehl, } "Fresnel lens arrays for x-ray imaging spectroscopy", Proc. SPIE 7732, Space Telescopes and Instrumentation 2010: Ultraviolet to Gamma Ray, 77322N (29 July 2010); doi: 10.1117/12.856457; https://doi.org/10.1117/12.856457


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