Abstract: ToresearchtheionizingradiationeffectsonChargeCoupledDevices(CCD)inspaceorbitenvironments,theexperimentsofionizingradiationeffectsonarrayCCDswerepresented.TheoutputsignalsversusintegrationtimeweremeasuredwhennolightwasincidentonthearrayCCDs.Thedarksignalslope(K_D)andthedarksignalvoltages(V_D)versusthetotaldoseswerepresented.Thedegradationsofdarksignalsversusthetotaldosesunderthedifferentbiasconditionswerecompared.Themechanismsofdarksignaldegradationinducedbyionizingradiationweredemonstrated.Theannealrecoveryofdarksignalwasalsomeasured.Thedarksignalnonuniformity(DSNU)versusintegrationtimeatdifferenttotaldoseswasanalyzed.TheexperimentalresultsshowthatthearrayCCDsareverysensitivetotheionizingdamage,andthedesignofthespaceimagingsystemshouldconsidertheinfluenceinducedbyionizingdamage.Theresultsprovideagoodunderstandingofthedegradations andmechanismsofthedarksignalinthearrayCCDinducedbyionizingdamage.

Key words: Arraychargecoupleddevice, Ionizingradiation, Darksignal, Anneal, Spaceorbitenvironment