ciADS直线加速器低电平控制系统设计进展.pdf

··IMPHIRFLAnnualReport

Asshowninthepicture,thewholeactivityinculdestwostageswithmorethan30kWsCWprotonbeam.The

beamparametersinthefirststageare15.8MeVand2.0mA,andthesecondoneare16.3MeVand2.1mA,which

areoptimizedvalueduetotheexperiencewithstageone.

Fig.2(coloronline)Beamcommissioningresults.

Thetotaloperationdurationismorethan110handtherearetotally67beamtripsinthebeamexperiment.

TheMTBF(MeanTimeBetweenFailure)is98.5min,whicharetentimeslongerthanbefore.TheMTBR(Mean

TimeBetweenRepair)reducesto12.2m.Thelongestdurationwithoutbeamtripreaches13.5h,thatisthelongest

operationrecordforthesametypelinac.Thebeamaviablityis89%,whichisovertherequirmentfortheADS

demostrationfacilty.

Whatismore,thesourceoftripsisanalyzedfromtheoperationdata.MostofthetripsarefromRFandcontrol

system,whichshouldbegreatlyimprovedtoincreaethefacilitystablity.

Thehighbeampowerof34kWsCWbeamhasbeenoperatedsuccessfullyatCAFeanda100hoperation

stabilityexperimenthasbeencarriedout.TheMTBFis98.5minandthelongestdurationwithoutbeamtrip

reaches13.5h,whicharesignificantimprovementincomparisontothatinpreviousyear.Thegreatexperiences,as

wellastheknowledge,havebeenacquiredbytheprojectteamduringthesuperconductingCWlinaccommissioning.

Muchdeeperoptimizationofsomekeysystemswillbeimplementedtoincreasetheoperationstabilityinthefuture.

GaoZheng,HuangGuirong,HeYuan,ZhuZhenglong,XueZongheng,GongZheng,MaJinyingandChenQi

TheCiADSprojectiscomposedo