Physics – Optics
Scientific paper
Nov 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998spie.3444..564r&link_type=abstract
Proc. SPIE Vol. 3444, p. 564-568, X-Ray Optics, Instruments, and Missions, Richard B. Hoover; Arthur B. Walker; Eds.
Physics
Optics
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 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.
Bruni Ricardo J.
Citterio Oberto
Everett John E.
Ghigo Mauro
Gorenstein Paul
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