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Proceedings Paper

XSPECT telescopes on the SRG: optical performance
Author(s): Niels J. Westergaard; Josef Polny; Finn Erland Christensen; Hans Ulrich Noergaard-Nielsen; Herbert W. Schnopper
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Paper Abstract

The XSPECT, thin foil, multiply nested telescope on SRG has been designed to achieve a large effective area at energies between 6 and 15 keV. The design goal for the angular resolution is 2 arcmin (HPD). Results of foil figure error measurements are presented. A ray tracing analysis was performed including results of earlier scattering measurements and the foil determination. The results of the analysis are compared with test measurements with X rays and show that there is a larger spread in the PSF than the model can account for. The decrease in effective area due to scattering is estimated to be 30% when the photons that scatter more than 6 arcmin are regarded as lost. The vignetting at off-axis angles leads to an effective area at the edge of the FOV which is 15% of that of an on-axis source.

Paper Details

Date Published: 11 November 1994
PDF: 6 pages
Proc. SPIE 2279, Advances in Multilayer and Grazing Incidence X-Ray/EUV/FUV Optics, (11 November 1994); doi: 10.1117/12.193167
Show Author Affiliations
Niels J. Westergaard, Danish Space Research Institute (Denmark)
Josef Polny, Danish Space Research Institute (Denmark)
Finn Erland Christensen, Danish Space Research Institute (Denmark)
Hans Ulrich Noergaard-Nielsen, Danish Space Research Institute (Denmark)
Herbert W. Schnopper, Danish Space Research Institute (Denmark)


Published in SPIE Proceedings Vol. 2279:
Advances in Multilayer and Grazing Incidence X-Ray/EUV/FUV Optics
Richard B. Hoover; Arthur B. C. Walker, Editor(s)

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