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NASA NTRS · 20180007058

X-Ray Optics Development at NASA MSFC

Broadway, D.
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Abstract

Outline: X-ray optics for space-borne applications; Electroformed NiCo X-ray optics at MSFC (Marshall Space Flight Center); Thin film coatings to enhance X-ray optical performance; Thin film stress; In-situ film stress measurement at MSFC: from prototype to refined design; Ultra lightweight aerogel mirrors.

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Broadway, D.. 2018-10-04. X-Ray Optics Development at NASA MSFC. https://ntrs.nasa.gov/citations/20180007058

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Differential Deposition for Surface Figure Corrections in Grazing Incidence X-Ray Optics

Differential deposition corrects the low- and mid- spatial-frequency deviations in the axial figure of Wolter-type grazing incidence X-ray optics. Figure deviations is one of the major contributors to the achievable angular resolution. Minimizing figure errors can significantly improve the imaging quality of X-ray optics. Material of varying thickness is selectively deposited, using DC magnetron sputtering, along the length of optic to minimize figure deviations. Custom vacuum chambers are built that can incorporate full-shell and segmented Xray optics. Metrology data of preliminary corrections on a single meridian of full-shell x-ray optics show an improvement of mid-spatial frequencies from 6.7 to 1.8 arc secs HPD. Efforts are in progress to correct a full-shell and segmented optics and to verify angular-resolution improvement with X-ray testing.

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