Radiation hardness of pn-CCDs for X-ray astronomy.

Details Radiation hardness of pn-CCDs for X-ray astronomy. Radiation hardness of pn-CCDs for X-ray astronomy.

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995itns...42.2066m&link_type=abstract

IEEE Trans. Nucl. Sci., Vol. 42, No. 6, p. 2066 - 2073

Astronomy and Astrophysics

Astronomy

4

Ccd Detectors: X-Ray Astronomy

Scientific paper

Results of all extensive radiation hardness tests of a full depletion pn-Charge Coupled Device (pn-CCD) detector are presented. The pn-CCD is a new type of Charge Coupled Device designed for X-ray spectroscopy in ESA's cornerstone X-ray Multi Mirror (XMM) satellite mission. The devices were irradiated with 10 MeV-protons with fluences up to 6.5·109cm-2. This is more than one order of magnitude higher than the equivalent proton radiation environment expected for the 10 year mission. The only effect to the device was a degradation of charge transfer efficiency (CTE) at temperatures around 120K. At XMM's operating temperature between 140K and 170K the performance of the detector will not significantly change during the 10 year mission. The degradation of the CTE was studied, and a method to improve it is described.

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