Operational aspects of the pn-CCD camera for XMM and ABRIXAS

Details Operational aspects of the pn-CCD camera for XMM and ABRIXAS Operational aspects of the pn-CCD camera for XMM and ABRIXAS

Oct 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999spie.3765..204k&link_type=abstract

Proc. SPIE Vol. 3765, p. 204-214, EUV, X-Ray, and Gamma-Ray Instrumentation for Astronomy X, Oswald H. Siegmund; Kathryn A. Flan

Astronomy and Astrophysics

Astronomy

7

Scientific paper

The pn-CCD camera is developed as one of the focal plane instrument for the European Photon Imaging Camera (EPIC) on board the x-ray multi mirror mission (XMM) to be launched in December 1999. On 28 April 1999 an almost identical camera was launched on the German x-ray satellite ABRIXAS. The detector consists of four quadrants of three pn-CCDs each, which are integrated on a single silicon wafer. Each CCD has 200 X 64 pixels with 280 micrometers depletion depth, resulting in good quantum efficiency up to 15 keV. To minimize photon pile-up and/or image smearing by out-of-time events, six standard readout modes with integration times ranging from 7 microsecond(s) ec up to 280 msec can be selected by the observer. Background and noise reduction is achieved by means of on board generated offset maps and hard wired common mode filtering. Tracks of minimum ionizing particles are identified and suppressed by the experiment software on board. In this paper we give an overview of the on board event processing and describe important operation aspects of the pn-CCD camera.

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