Physics – Optics
Scientific paper
Nov 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994spie.2279..526w&link_type=abstract
Proc. SPIE Vol. 2279, p. 526-531, Advances in Multilayer and Grazing Incidence X-Ray/EUV/FUV Optics, Richard B. Hoover; Arthur B
Physics
Optics
Scientific paper
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.
Christensen Finn E.
Norgaard-Nielsen Hans Ulrik
Polny Josef
Schnopper Herbert W.
Westergaard Niels Joergen
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