Transient noise in a CCD camera sensor induced by neutron and gamma irradiation

This paper presents the transient radiation sensitivity for a 512×512 CCD image sensor irradiated with both 14 MeV neutrons and gamma rays. We have investigated the different image degradations with a pulsed neutron source as a function of angle of incidence and CCD camera parameters. A complete analysis has been achieved for fluences from 10⁴ to 10⁷ n/cm² including neutron induced noise spectra. We have found a linear dependence of the number of bright and saturated pixels with fluence. The number and size of pixel clusters increase with fluence, particularly for grazing angle. In a second time, we have investigated gamma effects which only increase the background noise of the CCD.