Fig. 1. Schematic of irradiation experiment

Fig. 2. Relationship between variance gray value and mean gray value before proton irradiation

Fig. 3. Relationship between variance gray value and mean gray value before and after 60 MeV proton irradiation

Fig. 4. Relationship between variance gray value and mean gray value before and after 100 MeV proton irradiation

Fig. 5. Relationship between conversion gain with proton irradiation energy and proton fluence

Fig. 6. Relationship between linear saturation output with proton irradiation fluence

Fig. 7. Changes of dark signal spike in CCD pixel array after 60 MeV proton irradiation under different fluence. (a) Before irradiation; (b) proton fluence is 1×10¹⁰ cm^-2; (c) proton fluence is 1×10¹¹ cm^-2

Fig. 8. Changes of dark signal spike in CCD pixel array after 100 MeV proton irradiation under different fluence. (a) Before irradition; (b) proton fluence is 1×10¹⁰ cm^-2; (c) proton fluence is 1×10¹¹ cm^-2

Fig. 9. Relationship between dark current with proton irradiation energy and fluence