High Brightness Electron Beam Diagnostics and their ... - CASA
High Brightness Electron Beam Diagnostics and their ... - CASA High Brightness Electron Beam Diagnostics and their ... - CASA
Pickup Experiment #2 #3 #4 Simulation #2 #3 LinearCoecientQuadraticCoecient #4 -0.0801 -0.0834 0.1172 0.0911 0.1070 0.0256 0.0016 0.0003 0.0008 0.0006 0.0007 obtainedtransfermapsaregatheredingure3.17.Forthecasewherethelaseristurnedo(see parmela-simulatedphase-phasetransfermap. measurementswereperformedatvariousstagesofthedetuningcurveoftheopticalcavity.The Table3.2:Comparisonofcoecientsobtainedfromthenon-lineartofthemeasuredand 0.0004 fold-overduetothenon-lineareectintroducedbythelaserinteractionislessimportant.We tothe\nominalphase"havealargertimeofightbecausenowtheyarecontributingtothelaser processandthereforearelessenergetic.Atvariousstageofdetuningcurvesthephase-phasemap extractamaximumoutputpower,thefold-overissubstantial,bunchesemittedwithphaseclose havesucceededinoperatingthelaseratthelimitofitsturn-opointbyproperlyadjustingthe toT555contribution.Howeverwhenthelaseristurnedon(seeg.3.17(B)),andoptimizedto cavity,inthisregion,(seeg.3.17(E))wecannoticethatthephase-phasetransfermaphastwo g.3.17(A)),thetransfermaplooksasusual,mainlylinearwithasmallparabolicbehaviordue transfermaphasthesamefold-overaswhenthelaserisoptimizedformaximumoutputpower(see contributions:forbunchcenteredaroundthezero-crossingphase(i.e.10
φ OUT (RF−Deg) 5 0 −A− Nominal Trim Quad Off Trim Quad Reversed −5 −40 −20 0 20 40 5 0 −B− Nominal Trim Quad Off Trim Quad Reversed −5 −40 −20 0 20 40 −C− −D− Figure3.16:Demonstrationoflongitudinaldierence-orbit:phase-phasetransfermapmeasured 5 5 (A)andsimulated(B)forthreedierentsettingsofthetrimquadrupole.Plot(C)and(D)correspondtodierenceofthemeasuredmappresentedinthetoprawforrespectivelytheexperiment Off−Nominal andthesimulation. Off−Nominal 0 0 Reversed−Nominal Reversed−Nominal −5 −5 −40 −20 0 20 40 −40 −20 0 20 40 themomentumcompaction,R56.Sincethequadrupoleintroduceapathlengthvariationlinearly 3.4.7Measurementofhinjoutitransfermap EectsoftheTrimQuadrupoles Thetrimquadrupolefamilyhastwoeectsontheenergy-phasecorrelation.Firstlyitmodies φ (RF−Deg) φ (RF−Deg) IN IN Theresultsarepresentedingure3.18:alineartofthemeasuredtransfermaphasbeenper- Wehavemeasured,usingthenominalopticallatticesetuptheenergy-phasetransfermapatboth pickupcavitieslocateddownstreamarc1and2(pickupcavity#3and#4)onthegure3.12. dependentontheenergyoset.Alsoviaitssecondordercoecient,thetrimquadrupolesalso introducedaquadraticallyenergyosetdependentpathlengthvariationwhichresultsinamodicationofthenonlinearmomentumcompactionT566=houtj20i. φ OUT (RF−Deg)
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Pickup Experiment #2 #3 #4 Simulation #2 #3 LinearCoecientQuadraticCoecient<br />
#4 -0.0801 -0.0834 0.1172 0.0911 0.1070 0.0256 0.0016 0.0003 0.0008 0.0006 0.0007<br />
obtainedtransfermapsaregatheredingure3.17.Forthecasewherethelaseristurnedo(see parmela-simulatedphase-phasetransfermap. measurementswereperformedatvariousstagesofthedetuningcurveoftheopticalcavity.The Table3.2:Comparisonofcoecientsobtainedfromthenon-lineartofthemeasured<strong>and</strong> 0.0004<br />
fold-overduetothenon-lineareectintroducedbythelaserinteractionislessimportant.We tothe\nominalphase"havealargertimeofightbecausenowtheyarecontributingtothelaser process<strong>and</strong>thereforearelessenergetic.Atvariousstageofdetuningcurvesthephase-phasemap extractamaximumoutputpower,thefold-overissubstantial,bunchesemittedwithphaseclose havesucceededinoperatingthelaseratthelimitofitsturn-opointbyproperlyadjustingthe toT555contribution.Howeverwhenthelaseristurnedon(seeg.3.17(B)),<strong>and</strong>optimizedto cavity,inthisregion,(seeg.3.17(E))wecannoticethatthephase-phasetransfermaphastwo g.3.17(A)),thetransfermaplooksasusual,mainlylinearwithasmallparabolicbehaviordue<br />
transfermaphasthesamefold-overaswhenthelaserisoptimizedformaximumoutputpower(see contributions:forbunchcenteredaroundthezero-crossingphase(i.e.10
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