ALICE Diffractive Detector Control System for RUN-II in the ALICE Experiment

摘要

TheALICEDiffractive(AD0)detectorhasbeeninstalledandcommissionedforthesecondphaseofoperation(RUN-II).Withthisnewdetectoritispossibletoachievebettermeasurementsbyexpandingtherangeofpseudo-rapidityinwhichtheproductionofparticlescanbedetected.SpecificallytheselectionofdiffractiveeventsintheALICEexperimentwhichwaslimitedbytherangeoverwhichrapiditygapsoccur.AnynewdetectorshouldbeabletotakedatasynchronouslywithallotherdetectorsandtobeoperatedthroughtheALICEcentralsystems.OneofthekeyelementsdevelopedfortheAD0detectoristheDetectorControlSystem(DCS).TheDCSisdesignedtooperatesafelyandcorrectlythisdetector.Furthermore,theDCSmustalsoprovideoptimumoperatingconditionsfortheacquisitionandstorageofphysicsdataandensuretheseareofthehighestquality.TheoperationofAD0impliestheconfigurationofabout200parameters,aselectronicssettingsandpowersupplylevelsandthegenerationofsafetyalerts.ItalsoincludestheautomationofprocedurestogettheAD0detectorreadyfortakingdataintheappropriateconditionsforthedifferentruntypesinALICE.TheperformanceofAD0detectordependsonacertainnumberofparameterssuchasthenominalvoltagesforeachphotomultipliertube(PMT),thethresholdlevelstoacceptorrejecttheincomingpulses,thedefinitionoftriggers,etc.AlltheseparametersaffecttheefficiencyofAD0andtheyhavetobemonitoredandcontrolledbytheAD0DCS...