Lessons learned from the stray-light analysis of the XMM telescope

Gary L. Peterson; Marie Cote

doi:10.1117/12.278861

11 July 1997 Lessons learned from the stray-light analysis of the XMM telescope

Gary L. Peterson, Marie Cote

Proceedings Volume 3113, Grazing Incidence and Multilayer X-Ray Optical Systems; (1997) https://doi.org/10.1117/12.278861
Event: Optical Science, Engineering and Instrumentation '97, 1997, San Diego, CA, United States

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.

Citation Download Citation

Gary L. Peterson and Marie Cote "Lessons learned from the stray-light analysis of the XMM telescope", Proc. SPIE 3113, Grazing Incidence and Multilayer X-Ray Optical Systems, (11 July 1997); https://doi.org/10.1117/12.278861

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