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Double splitting PS Cern双分裂聚苯乙烯欧洲核子的研究中心.ppt

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Double splitting PS Cern双分裂聚苯乙烯欧洲核子的研究中心.ppt

上传人:erterye 2020/7/30 文件大小:1.14 MB

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Double splitting PS Cern双分裂聚苯乙烯欧洲核子的研究中心.ppt

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文档介绍:TRIPLEBUNCHSPLITTING (bunch)´1011ppb85%Blow-up(optimistic)25eVs(total)96´1011p1eVs(bunch)6´(bunch)12´1011ppb45%Blow-up(voluntary) :Doublesplitting(h=8->h=16)(h=16-)/rebunching(h=84-40MHz)at26GeV/cBeamcharacteristicsatejection:Factorslimitingpresentperformance:Drawbacksofdebunching/rebunching(emittanceblow-up,microwaveinstability,lackofreproducibility) (bunch)´1011ppb1eVs(bunch)´(bunch)´1011ppb40%Blow-up(pessimistic)115%Blow-up(voluntary)(es): : (es): (withrespecttodebunching/rebunching&basedonexperiencewithdoublesplitting):goodcontrol(potentialpreservation)oflongitudinalemittance:noneedforverylowRFvoltagestominimiseblow-up,capabilitytopreserveagapwithoutparticlesoverafractionofthecircumference,goodreproducibility:beamisalwaysconfinedbyRFs,andfeedbackloopscanbeusedforstabilisation,lowerriskofmicrowaveinstabilitythankstothelarger(Dp/p)2/: -rangedisplay(1PSBbunch)T=1