Incoming metrology of segmented x-ray mandrels at MSFC

Details Incoming metrology of segmented x-ray mandrels at MSFC Incoming metrology of segmented x-ray mandrels at MSFC

Sep 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004spie.5494..447g&link_type=abstract

Optical Fabrication, Metrology, and Material Advancements for Telescopes, Edited by E. Atad-Ettedgui and P. Dierickx. Procee

Physics

Optics

Scientific paper

The baseline design of the Constellation-X Spectroscopy X-ray telescope (SXT) employs segmented x-ray mirrors, to be replicated from precision mandrels. Thus far, the Constellation-X Project has procured and received three (3) flight-scale mandrels, for use in development of mirror technologies. Complementary to 30° sections of 10-m-focal-length Wolter-1 optics of diameters 1.6, 1.2, and 1.0 m, the mandrels" primary (parabolic) and secondary (hyperbolic) optical surfaces are each 0.5-m long. In order to generate surface maps for x-ray performance predictions, NASA"s Marshall Space Flight Center (MSFC) is conducting incoming metrology. Using a combination of instruments, this metrology measures axial-slope deviations and axial profiles, slope differences, roundness, absolute radius, and micro-roughness. This paper describes the mandrels, the metrology requirements, and MSFC"s metrology instrumentation and procedures.

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