METROLOGY

Fabrication, performance, and figure metrology of epoxy-replicated aluminum foils for hard x-ray focusing multilayer-coated segmented conical optics

[+] Author Affiliations
Mario A. Jimenez-Garate, William W. Craig, Charles J. Hailey

Columbia Astrophysics Laboratory, 538 West 120th St., New York, New York?10027

Finn E. Christensen, Ahsen Hussain

Danish Space Research Institute, Juliane Maries Vej?30, Copenhagen, Denmark

Opt. Eng. 39(11), 2982-2994 (Nov 01, 2000). doi:10.1117/1.1315572
History: Received Jan. 13, 2000; Revised June 19, 2000; Accepted June 21, 2000
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Abstract

We fabricated x-ray mirrors for hard x-ray (≳10 keV) telescopes using multilayer coatings and an improved epoxy-replicated aluminum foil (ERAF) nonvacuum technology. The ERAF optics have ∼1 arcmin axial figure half-power diameter (HPD) and passed environmental testing. Reflectivity measurements at 8 keV on ERAFs with and without multilayer coatings show a 4.4 to 4.8 Å root mean square (rms) microroughness for correlation lengths ⩽15 μm. To reduce the dominant contribution of mirror assembly and large-scale distortion in the overall telescope HPD, we designed a figure metrology system and a new mounting technique. We describe a cylindrical metrology system built for fast axial and roundness figure measurement of hard x-ray conical optics. These developments lower cost and improve the optics performance of the HEFT (high-energy focusing telescope) and Constellation-X missions. © 2000 Society of Photo-Optical Instrumentation Engineers.

© 2000 Society of Photo-Optical Instrumentation Engineers

Citation

Mario A. Jimenez-Garate ; William W. Craig ; Charles J. Hailey ; Finn E. Christensen and Ahsen Hussain
"Fabrication, performance, and figure metrology of epoxy-replicated aluminum foils for hard x-ray focusing multilayer-coated segmented conical optics", Opt. Eng. 39(11), 2982-2994 (Nov 01, 2000). ; http://dx.doi.org/10.1117/1.1315572


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