Analysis of charge transfer inefficiency of CCD equipment under proton radiation

The charge coupled device(CCD) is the key component of beacon light subsystem in optical satellite communication system. The influences of space radiation environment on CCD´s charge transfer efficiency(CTE) and its dark current are theoretically analyzed. Based on the analysis the induced CTE degradations under some typical operation temperatures and particle fluences are numerically calculated. The calculation results have proved that adding shielding layers and temperature controlling unit are both the efficient ways to improve the radiation hardness of optical satellite communication system.