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29 September 1999 X-ray measurements of a prototype WFXT SiC mirror at the MSFC X-Ray Calibration Facility
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Abstract
The OAB design for the Wide-Field X-ray Telescope (WFXT) employs 5-term-polynomial modifications to the Wolter-I prescription, to optimize the angular resolution over a wide field. The goal is to achieve a half-power diameter, including manufacturing errors, better than 15 arcseconds over a 1-degree field of view. The WFXT optical system will provide an effective area of 360 cm2 at 1.5 keV and 85 cm2 at 4.5 keV. It comprises 25 nested shells, with diameters from 226 mm to 600 mm and total length of 240. Here we describe the x-ray measurements made at the NASA Marshall Space Flight Center x-ray Calibration Facility of the performance of a prototype 600-mm-diameter shell. The tested shell, replicated onto a Silicon Carbide carrier to satisfy WFXT's stringent angular-resolution and weight requirements, exhibits a half-power diameter of about 10 arcseconds at 0.1 keV.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Mauro Ghigo, Oberto Citterio, Francesco Mazzoleni, Jeffery J. Kolodziejczak, Stephen L. O'Dell, Robert A. Austin, and G. Zirnstein "X-ray measurements of a prototype WFXT SiC mirror at the MSFC X-Ray Calibration Facility", Proc. SPIE 3766, X-Ray Optics, Instruments, and Missions II, (29 September 1999); https://doi.org/10.1117/12.363637
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