Title :
Effects of Low Temperature Proton Irradiation on a Large Area CCD for Astrometric Applications
Author :
Hopkinson, Gordon R. ; Gare, Philippe ; Sarri, Giuseppe
Author_Institution :
Surrey Satellite Technol. Ltd., Sevenoaks, UK
Abstract :
Charge transfer and dark current effects are compared for regions of a large area 4500 × 1966 pixel CCD irradiated with 7.4 MeV protons at -130°C and at room temperature. Post-annealing measurements were also performed. Although there are differences in the concentration of individual defects following warm and -130°C irradiation and after subsequent annealing steps, these differences were less than a factor 3.5 (and in most cases a factor 2)-with the room temperature irradiation giving a good estimate of the effects except for traps with emission time constant ~4 ms.
Keywords :
CCD image sensors; astrometry; dark conductivity; proton effects; astrometric applications; charge transfer effect; dark current effect; electron volt energy 7 MeV; image sensors; large area CCD; low temperature proton irradiation; picture size 1966 pixel; picture size 4500 pixel; post-annealing measurements; proton radiation effects; room temperature irradiation; temperature 130 C; Annealing; Charge coupled devices; Charge measurement; Dark current; Extraterrestrial measurements; Performance evaluation; Pixel; Protons; Radiation effects; Satellites; Space technology; Temperature distribution; Temperature measurement; Temperature sensors; Image sensors; proton radiation effects; radiation effects; satellite applications;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2009.2037817
