Mitigation technique for use of CMOS image sensors in megajoule class laser radiative environment

Abstract

International audiencePresented is a new mitigation technique to improve the radiation tolerance of CMOS image sensors to the radiation constraints associated to the fusion by inertial confinement experiments at megajoule class laser facilities. Using the global reset mode, results acquired at the OMEGA facility show the efficiency of this technique to reduce by more than 70% the number of white pixels induced by the mixed 14 MeV neutron and gamma-ray pulse

Modeling Approach for the Prediction of Transient and Permanent Degradations of Image Sensors in Complex Radiation Environments

“…While the ultimate goal is to predict the behavior of image sensors in the LMJ environment, no data are by definition available for this configuration. However, recent work aiming at investigating the vulnerability of CMOS Active Pixel Sensors (APS) in Megajoule class laser environments presented results of experiments at the OMEGA facility in Rochester, NY, USA ( [21], [22]). This facility provides a unique platform to evaluate the effects of a pulsed mixed radiation environment, at a neutron yield lower than the one expected for LMJ (10 13 instead of 10 18 neutrons per shot) but representative of preliminary Inertial Confinement Fusion (ICF) experiments in megajoule class laser facility.…”

“…It may be noted that this stage of the approach may also be used to evaluate the feasibility of a hardening-by-system study through shielding of the image sensor for example. The temporal aspect (not detailed here) can also be exploited and lead to mitigation techniques ( [22], [24]).…”