Optical performance prediction of thin-walled Wolter type I mirror shells for x-rays in the 1- to 8-keV energy range

Holger Glatzel; Dieter Pauschinger; Hans-Joachim J. Frasch; Herbert Gross

doi:10.1117/12.140556

21 January 1993 Optical performance prediction of thin-walled Wolter type I mirror shells for x-rays in the 1- to 8-keV energy range

Holger Glatzel, Dieter Pauschinger, Hans-Joachim J. Frasch, Herbert Gross

Author Affiliations +

Proceedings Volume 1742, Multilayer and Grazing Incidence X-Ray/EUV Optics for Astronomy and Projection Lithography; (1993) https://doi.org/10.1117/12.140556
Event: San Diego '92, 1992, San Diego, CA, United States

Abstract

The study predicts, on the basis of surface topology measurements, the optical performance of thin-walled Wolter type 1 mirror shells over the specified energy range of the XMM telescope (0.3-8 keV). To analyze the effect of deformations which can be treated by geometrical optics, a Monte Carlo code was developed which uses a 3D model of the telescope to trace individual rays through the telescope. The computed point spread functions are found to be in excellent agreement with the ones measured in a full-aperture test at 1.5 keV X-ray energy. At 8 keV, a loss in optical performance was observed. A comparison of the surface data with mirrors that performed efficiently at 8 keV showed deformations with spatial wavelengths below 1 mm to be responsible for the degradation at 8 keV X-ray energy. It is concluded that in the transition region between Rayleigh limit and smooth surface limit, approximate optical predictions can be achieved by applying geometrical optics.

Citation Download Citation

Holger Glatzel, Dieter Pauschinger, Hans-Joachim J. Frasch, and Herbert Gross "Optical performance prediction of thin-walled Wolter type I mirror shells for x-rays in the 1- to 8-keV energy range", Proc. SPIE 1742, Multilayer and Grazing Incidence X-Ray/EUV Optics for Astronomy and Projection Lithography, (21 January 1993); https://doi.org/10.1117/12.140556

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