Background rejection techniques in CCD X-ray detectors for astronomy

Details Background rejection techniques in CCD X-ray detectors for astronomy Background rejection techniques in CCD X-ray detectors for astronomy

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988itns...35..534l&link_type=abstract

(IEEE, DOE, Lawrence Livermore National Laboratory, et al., Nuclear Science Symposium, 34th, and Symposium on Nuclear Power Syst

Astronomy and Astrophysics

Astronomy

2

Background Radiation, Charge Coupled Devices, Radiation Detectors, X Ray Astronomy, Calibrating, Image Processing, Spaceborne Astronomy, Spectral Resolution, X Ray Spectra

Scientific paper

A number of different charge-coupled devices (CCDs) have been exposed to gamma and beta sources in order to simulate the charged-particle background response of spaceborne X-ray astronomy detectors. Two rejection techniques have been investigated: energy veto and pixel-to-pixel anticoincidence. In the most favorable conditions, a rejection of more than 99.9 percent has been obtained. The latter selection criterion can be used to reject X-ray data in which the event charge is incompletely collected. Improved X-ray energy resolution is obtained, and an upper limit to the Fano factor in silicon is measured. A novel technique for minimizing systematic errors in the X-ray-energy-to-charge-conversion factor is described.

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