Further development of CCD X-ray detectors for astronomy

Details Further development of CCD X-ray detectors for astronomy Further development of CCD X-ray detectors for astronomy

Nov 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989spie.1159..113h&link_type=abstract

IN: EUV, X-ray, and gamma-ray instrumentation for astronomy and atomic physics; Proceedings of the Meeting, San Diego, CA, Aug.

Astronomy and Astrophysics

Astronomy

Charge Coupled Devices, Radiation Detectors, X Ray Astronomy, X Ray Spectra, Imaging Techniques, Spaceborne Astronomy, Spatial Resolution

Scientific paper

A number of future space-borne X-ray astronomy missions have now been proposed, which will utilize CCD imaging devices in their focal planes. The CCDs will offer simultaneously high spatial resolution, excellent energy resolution and detection sensitivity. However, a number of technological developments are still to be demonstrated before the X-ray performance of CCDs is optimized. The development of CCDs fabricated on high resistivity silicon wafers, combined with back thinning and annealing processes, allows the production of fully depleted detectors. These devices are capable of detecting single X-ray photons, with high efficiency throughout the 0.1-15 keV energy band. Efficient coverage of focal planes is facilitated with the introduction of new large area CCDs. The EEV P88000 series CCDs have a range of formats up to 1242 x 1152 pixels (6.5 sq cm), and have included process changes to optimize noise (5.5 electrons rms) and dark current. Results of a program to investigate the tolerance of EEV CCDs to ionizing radiation are also presented.

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