Results of X-ray measurements on electroformed mirror shells for the XMM project

Details Results of X-ray measurements on electroformed mirror shells for the XMM project Results of X-ray measurements on electroformed mirror shells for the XMM project

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993spie.1742..256c&link_type=abstract

In: Multilayer and grazing incidence X-ray/EUV optics for astronomy and projection lithography; Proceedings of the Meeting, San

Astronomy and Astrophysics

Astronomy

1

Electroforming, Grazing Incidence, Mirrors, X Ray Astronomy, X Ray Telescopes, Angular Resolution, European Space Agency, X Ray Spectroscopy

Scientific paper

XMM is a Cornerstone Mission of the European Space Agency for X-ray Astronomy. It consists of three X-ray telescopes with identical mirror systems. Each mirror system is composed of 58 nested coaxial and cofocal mirror shell (MS). The telescopes operate in the energy range 0.2-10 KeV with a total collecting area greater than 4800 sq cm at 2 KeV. The angular resolution is specified to HEW less than 30 arcsec at 8 KeV. The high packing density requires the production of very thin MS to minimize the loss of collecting area due to the thickness of the shells. The replica technique by electroforming nickel MS from mandrels allow the production of MS with a thickness of a few tenths of a mm. This technique has been successfully applied for the SAX and JET-X X-ray telescopes. In order to demonstrate the capabilities of this technology for the XMM project, a mirror support structure has been manufactured which allows the integration of one MS with different diameters and thickness between 0.4 to 1.0 mm. Mirror shells of different thickness and diameters have been manufactured and X-ray tested. The preliminary results of these measurements are presented.

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