ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa


Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2018, Vol. 15, No. 6, pp. 119-130

Comparison of the structural damage effects in CMOS and CCD used in star trackers by the example of CMV4000 and LEV-4 CCD

E.V. Belinskaya 1 , A.A. Kobeleva 1 , P.S. Smetanin 1 , Ya.D. Elyashev 1 , M.E. Chernyak 2 
1 Space Research Institute RAS, Moscow, Russia
2 Experimental Scientific and Production Association “Specialized Electron Systems”, Moscow, Russia
Accepted: 26.11.2018
DOI: 10.21046/2070-7401-2018-15-6-119-130
The work is devoted to the study and comparison of the CMOS and CCD resistance to the impact of individual particles by the effects of structural damage on the example of CMV4000 and Lev-4 CCD used in star trackers. The effects observed when exposed to the neutron flux with the fluence of 5•1010 neutrons/cm2, which corresponds to a dose of structural damage of 1.55 rad are discussed. For each sensor, we give the dependences of the mean value of the dark signal and the standard deviation of the dark signal over the frame on the exposure time before and after neutron exposure, as well as histograms of pixel brightness distribution before and after irradiation for the two values of the exposure time, and number of incorrectly localized objects in both sensors with given localization thresholds. The change in the brightness of the RTS-pixel from frame to frame is clearly presented. The effect of reducing the charge transfer efficiency in the CCD array and the influence of “annealing» at room temperature on the sensors photometric characteristics are considered. An algorithm for the selection of stars on the background noise of the array is described. The dependence of the sensors’ photometric parameters on the crystal temperature was studied. Measures to reduce the effect of structural damage on the sensors’ photometric parameter are proposed.
Keywords: CMOS, CCD, tests, resistance, neutrons, structural effects, ionizing radiation of outer space
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