X-ray applications of deep-depletion CCDs

Details X-ray applications of deep-depletion CCDs X-ray applications of deep-depletion CCDs

Sep 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985esasp.239..291w&link_type=abstract

In ESA Proceedings of ESA Workshop on a Cosmic X-Ray Spectroscopy Mission p 291-295 (SEE N86-22461 12-89)

Astronomy and Astrophysics

Astronomy

Charge Coupled Devices, X Ray Astronomy, X Ray Spectroscopy, Focal Plane Devices, Particle Telescopes, Photons, Quantum Efficiency, Spaceborne Astronomy, Spatial Resolution

Scientific paper

Results demonstrating the successful use of deep-depletion CCDs as single photon X-ray detectors are presented. As focal plane X-ray detectors for X-ray astronomy, CCDs offer high spatial resolution combined with good energy resolution. The importance of deep-depletion CCDs is a significantly higher X-ray quantum efficiency (QE) than that of conventional CCDs. The measured QE for a 56 micron deep CCD manufactured from 4000 ohm-cm Si is 76% at 6 keV, over 3 times that of a conventional (10 micrometer 10 ohm-cm) CCD. The spatial resolution and energy resolution are comparable with conventional CCDs. A further advantage of deep-depletion CCDs is that cosmic rays deposit 15keV in a deep-depletion CCD allowing 90% of cosmic ray events to be rejected using energy discrimination. The application of CCDs to an X-ray astronomy mission such as XMM is described.

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