Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985esasp.239..213c&link_type=abstract
In ESA Proceedings of ESA Workshop on a Cosmic X-Ray Spectroscopy Mission p 213-220 (SEE N86-22461 12-89)
Astronomy and Astrophysics
Astronomy
Mirrors, Spectrometers, X Ray Scattering, X Ray Telescopes, Gold Coatings, Quality Control, Surface Roughness Effects, Thin Films
Scientific paper
An X-ray study of test crystals for which the mosaicity and the perfection of the microcrystallites were measured was performed for the XMM X-ray spectrometer. These parameters play a significant role in determining the overall efficiency and the achievable energy-resolution of the XMM spaceborne spectrometer. The measurements were done with a four crystal X-ray spectrometer using three perfect quartz-crystals as beam defining element. Results from measurements on test crystals ranging from LiF(2d = 2.85A) to KAP(2d = 26.6A) are presented. The measurements were performed on flat crystal pieces. The results are very encouraging for application of the proposed crystals as dispersive elements in a high resolution dispersive spectrometer for X-ray astronomy.
Christensen Finn E.
Schnopper Herbert W.
Silver Eric H.
Westergaard Niels Joergen
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