WereportonthetemporalcontrastperformanceofthePHELIXfacilityinviewoftherequirementsimposedbysolidtargetinteractionexperiments.Therequirementanalysisforthenanosecondandpicosecondtemporalcontrastisderivedfromempiricaldataandsimpletheoreticalmodeling,whiletherealizationshowsthatusinganultrafastopticalparametricamplifierandplasmamirrorsenablesmeetingthisspecification.