Conference paper
XSPECT telescopes on the SRG: optical performance
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.
| Language: | English |
|---|---|
| Year: | 1994 |
| Pages: | 526-531 |
| Proceedings: | Advances in Multilayer and Grazing Incidence X-Ray/EUV/FUV Optics |
| ISSN: | 1996756x and 0277786x |
| Types: | Conference paper |
| DOI: | 10.1117/12.193167 |
| ORCIDs: | Westergaard, Niels Jørgen Stenfeldt , Christensen, Finn Erland and Nørgaard-Nielsen, Hans Ulrik |
