AXAF VETA-I mirror x-ray test results cross-check with the HDOS metrology data

Details AXAF VETA-I mirror x-ray test results cross-check with the HDOS metrology data AXAF VETA-I mirror x-ray test results cross-check with the HDOS metrology data

Jun 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995spie.2515..391z&link_type=abstract

Proc. SPIE Vol. 2515, p. 391-409, X-Ray and Extreme Ultraviolet Optics, Richard B. Hoover; Arthur B. Walker; Eds.

Physics

Optics

Scientific paper

The AXAF VETA-I mirror x-ray test results have been cross checked with predictions based upon the HDOS metrology measurements and calculations of the effects of imperfect test system geometry and mirror mount induced distortions. The cross check was done by comparing the VETA-I x-ray test results with a VETA-I model, which is a computer simulation of the VETA-I mirror performance during the x-ray test. The HDOS (Hughes Danbury Optical Systems, Inc., Danbury, Conn.) metrology measurements (with CIDS, PMS, and WYKO) were performed after the VETA-I x-ray test in order to determine the surface figure errors of the mirror pair, including the overall surface map and the surface roughness. Mirror performance was predicted based on the measured surface figure errors and x-ray scattering theory. All the VETA-I x-ray test data (FWHM, encircled energy, effective area, wing scan, and ring focus) were cross checked with the HDOS metrology measurements. The results of this study show reasonably good agreement between the x-ray test data and the metrology data. Similar analysis should be performed for the HRMA mirrors, which is an important step in securing a scientifically successful AXAF mission.

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