Physics – Optics
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.1742..620r&link_type=abstract
SPIE Conference on Multilayer and Grazing Incidence X-Ray/EUV Optics for Astronomy and Projection Lithography, p. 620 - 630
Physics
Optics
X-Ray Optics: Tests
Scientific paper
The Array of Low Energy X-ray Imaging Sensors (ALEXIS) experiment, a mini-satellite containing six wide angle EUV/ultrasoft X-ray telescopes, is scheduled to be launched by a Pegasus rocket into a 425 nautical mile orbit in 1992 to observe cosmic X-rays. The telescopes utilize near normal incidence optics featuring a 12.8 cm diamter, 13.52 cm radius of curvature spherical mirror with a Mo/Si multilayer coating. The authors present measured performance data for these mirrors including the two dimensional uniformity of the multilayer as a function of both radius and angular rotation, the measured reflectivity at the primary wavelength and the effectiveness of the "wavetrap". The authors also discuss problems encountered due to contamination and design changes that have been made to mitigate the effect of contamination.
Ameduri Frank
Roussel-Dupre Diane
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