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Proceedings Paper

Radiation entrance windows for CCD detectors
Author(s): Karl-Heinz Stephan; Heinrich W. Braeuninger; Claus Reppin; Hans-Joerg Maier; Dagmar Frischke; Michael K. Krumrey; Peter Mueller
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Paper Abstract

A prototype spectral filter was developed to be used as a radiation entrance window for a satellite borne CCD (Charge coupled device) X-ray imaging detector, which is presently under development within the EOBB (Electro-Optical-Breadboard) phase of ESA's XMM project. The unsupported filter has an effective size of 30 mm X 10 mm and is composed of multi-layered thin films of parylene N, aluminum, and carbon with mass densities of 25, 30 and 25 (mu) g/cm2 respectively. CCD's have a broad spectral response ranging from the X-ray to the NIR (Near Infrared) range. For X-ray observations the filter being located in front of the detector must suppress the radiation of VIS (Visible) and UV (Ultraviolet) stars by more than 6 orders of magnitude and be highly transparent at energies above 0.1 keV. The technique to manufacture the windows and the measurements of the spectral transmittance as well as the environmental testing is described. The performance data are given.

Paper Details

Date Published: 8 October 1992
PDF: 7 pages
Proc. SPIE 1743, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III, (8 October 1992); doi: 10.1117/12.130681
Show Author Affiliations
Karl-Heinz Stephan, Max-Planck-Institut fuer Extraterrestrische Physik (Germany)
Heinrich W. Braeuninger, Max-Planck-Institut fuer Extraterrestrische Physik (Germany)
Claus Reppin, Max-Planck-Institut fuer Extraterrestrische Physik (Germany)
Hans-Joerg Maier, Ludwig-Maximilians-Univ. Muenchen (Germany)
Dagmar Frischke, Ludwig-Maximilians-Univ. Muenchen (Germany)
Michael K. Krumrey, Physikalisch-Technische Bundesanstalt Berlin (Germany)
Peter Mueller, Physikalisch-Technische Bundesanstalt Berlin (Germany)

Published in SPIE Proceedings Vol. 1743:
EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy III
Oswald H. W. Siegmund, Editor(s)

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