BEPCⅡ电子枪系统测试与运行
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30520065HIGHENERGYPHYSICSANDNUCLEARPHYSICSVol.30,No.5May,2006
ExperimentandOperationofBEPCElectronGunSystem*
LIUBoGUMeng-Ping1)WANGShu-HongCHIYun-LongYANGXing-Wang
TIANShuang-MinLIUWei-BinYEQiang
(InstituteofHighEnergyPhysics,CAS,Beijing100049,China)
AbstractThenewelectrongunsystemfortheBEPCwastestedonthetestbenchinJuly,2004,and
hasbeenputintooperationsinceNov.2004.Thisarticledescribestheexperimentresultsandoperation
statusofthisnewsystem.Thedesigncurrentofthegunis10Aforthepulselengthof1nssinglebunch
ortwobuncheswithrepetitionrateof50Hz.Thegunisoperatedwithapulsedhighvoltagepowersupply
whichcanprovideupto200kVhighvoltage.Someimportantcorrelationcurvesareobtainedduring
theexperiment.Two-bunchoperationisavailableandsomeelementarytestshavebeenperformed.The
measurementresultsincludingbeamcurrentandbeamemittanceshowthatthesimulationsperformed
duringdesignstageareroughlyconsistentwiththepractice.Thepracticaloperationshowsthatthedesign
andmanufacturearebasicallysuccessful.
Keywordselectrongun,operation,experiment,simulation
1Introduction
TheelectrongunusedfortheBEPCisacon-
ventionalthermionictriodegunequippedwiththe
EIMACY824cathode-gridassembly[1],beenworking
at80kVhighvoltagewith2.5nspulsewidth,and
thebeamcurrentisabout5A.Inordertoincrease
Table1.MainspecificationsoftheelectrongunfortheBEPC[3].
typethermionictriodegun
cathodeY796(EIMAC)dispenser
beamcurrent(max.)A>10
highvoltageofanodekV150∼200
biasvoltageofgridV0∼−400
operationmode11nssinglebunch
operationmode21nstwobunches
operationmode32.5µssinglebunch
repetitionrateHz12.5,25,50
Received11October2005,Revised22December2005*SupportedbytheBEPCProject1)E-mail:gump@mail.ihep.ac.cn466—4695BEPC467468(HEP&NP)305BEPC469
References
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BEPC*
1)
(100049)
20047BEPC,11BEPC.
.10A,1ns,50Hz,200kV,
.,.
.,
.