Hard X-Ray and Wide Focusing Telescopes

Details Hard X-Ray and Wide Focusing Telescopes Hard X-Ray and Wide Focusing Telescopes

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998sao..reptw....g&link_type=abstract

Technical Report, Smithsonian Astrophysical Observatory Cambridge, MA United States

Physics

Optics

Amorphous Materials, Electroforming, Substrates, Coatings, Epoxy Resins, X Ray Telescopes, Replicas, Nickel, Carbon, Deposition, X Rays

Scientific paper

Studies are being carried out to compare the performance of several different separation materials used in the replication process. This report presents the results obtained during the second year of a program which consists of replicating smooth, thin substrates, depositing multilayer coatings upon them, and evaluating their performance. Replication and multilayer coatings are both critically important to the development of focussing hard X-ray telescopes that function up to 100 keV. The activities of the current year include extending the comparison between sputtered amorphous carbon and evaporated gold to include sputtered as well as evaporated gold. The figure of merit being the smoothness of the replica which has a direct effect on the specular reflectivity. These results were obtained with epoxy replication, but they should be applicable to electroformed nickel, the process we expect to use for the ultimate replicated optics.

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