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Proceedings Paper

Lessons learned from the stray-light analysis of the XMM telescope
Author(s): Gary L. Peterson; Marie Cote
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Paper Abstract

The European Space Agency (ESA) X-Ray Mirror Module (XMM) telescope is a set of three multiple shell grazing incidence Wolter Type I telescopes that will study astronomical x-ray sources from Earth orbit. There are a total of 58 nested mirror shells within each telescope. Each shell consists of a paraboloid primary and hyperboloid secondary that together focus x rays that are incident at grazing incidence onto a detector, known as the EPIC. Two of the telescopes also have grazing incidence diffraction gratings that disperse a portion of the focused x rays across a second detector, known as the RFC. The complex geometry of XMM makes stray light design and analysis of this telescope a unique and difficult challenge. The fundamental problem is that the detectors collecting the x-rays are also sensitive to visible and near-infrared radiation from outside sources such as the Sun and the Earth. This paper is an overview of the approach used to perform a stray light analysis of this visible radiation, and a presentation of four of the stray light problems that are unique to XMM and related grazing incidence telescopes. For each problem, a summary of the technique that was used to calculate the magnitude of the stray light is given.

Paper Details

Date Published: 11 July 1997
PDF: 13 pages
Proc. SPIE 3113, Grazing Incidence and Multilayer X-Ray Optical Systems, (11 July 1997); doi: 10.1117/12.278861
Show Author Affiliations
Gary L. Peterson, Breault Research Organization, Inc. (United States)
Marie Cote, Breault Research Organization, Inc. (United States)

Published in SPIE Proceedings Vol. 3113:
Grazing Incidence and Multilayer X-Ray Optical Systems
Richard B. Hoover; Arthur B. C. Walker II, Editor(s)

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