High Brightness Electron Beam Diagnostics and their ... - CASA
High Brightness Electron Beam Diagnostics and their ... - CASA High Brightness Electron Beam Diagnostics and their ... - CASA
wetriedtoperformedthemeasurements.Howeverapreliminaryconclusionwouldindicatethat CSRisnotasignicanteectintheIRFEL,inthesensethatnotremendousgrowthofthe 6.5.3Conclusion thefuture,oncethebeamdynamicsinthemachineisfullyoptimized,oneshouldtrytotransport transverseemittanceortheenergyspreadwasobservedevenat60pC.Onlyonemeasurementhas beenperformedandtheremightbeopticallatticesetupsthatmayprovidealargerenergyspread andemittancegrowth.AtminimumwecanconcludethatwiththenominalsetupoftheIRFEL OurexperimentonCSRwasnotverysuccessfulbecauseofbadbeamqualityduringtheperiod highercharge(e.g.thefull135pCrequiredfortheUpgradeIRFEL),andattempttogenerateand measurebeamdegradationduetobends. acceleratorneithersignicantemittancedilutionnorenergyspreadgenerationweremeasured.In
Conclusion Chapter7 Therecirculatortransverseresponsefunctions,thelatticedispersion,andthelongitudinaltransfer Theworkpresentedinthepresentreportdescribesindetailtheimplementationofdierenttypesof functionsR56andR55(alongwithnonlinearities)havebeenmeasuredandcomparedwithamag- commissioning,understandingandoperatingthersthighaveragepower(kW-level)infra-redfree electronlaseroscillatorthathasbeenbuiltatThomasJeersonNationalAcceleratorFacility. diagnosticsforarelativelyhighbrightnesselectronbeamandtheapplicationsofthesediagnostics tostudysomebeamdynamicsproblems.Thisworkhadasignicantcontributioninthesuccessof neticopticscodesuchasdimadandparticlepushingcodesuchasparmela. Wehaveimplementedtwotransversephasespacecharacterizationtechniquestostudythephase theemittancedominatedregime.Theformertechniquebasedontransversephasespacesampling usingamultislitmaskhasallowedsomepreliminaryparametricstudiesofthephasespaceof60pC chargeperbunchbeamproducedatthefrontendofa10MeVphotoinjectorandhasbeencapable toresolveemittanceaslowas1mm-mradinatestinjectorstand. Alongwiththetransversephasespace,afullsix-dimensionalcharacterizationofthephasespacehas spacedensityoftheelectronbeamasitisstillinthespace-chargedominatedregime,butalsoin coherenttransitionradiationproducedbythebunchedelectronbeam.Thisinterferometerhasalso beenusedtoperformparametricstudyofthebunchlengthevolutionversussomeradio-frequency elementthatplayakeyroleinthebunchingscheme. FinallyafullmodelbasedonmultiparticlesimulationoftheIRFELhasbeenelaboratedandcom- beenattemptedbymeasuringbothbunchlengthandenergyspreadoftheelectronbeam.Because paredwhenpossiblewithexperiments.Atentativeexperimenttomeasureenergyspreadgeneration oftheultra-shortbeamrequiredtodriveafree-electronlaser(typically
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Conclusion Chapter7<br />
Therecirculatortransverseresponsefunctions,thelatticedispersion,<strong>and</strong>thelongitudinaltransfer Theworkpresentedinthepresentreportdescribesindetailtheimplementationofdierenttypesof<br />
functionsR56<strong>and</strong>R55(alongwithnonlinearities)havebeenmeasured<strong>and</strong>comparedwithamag- commissioning,underst<strong>and</strong>ing<strong>and</strong>operatingthersthighaveragepower(kW-level)infra-redfree electronlaseroscillatorthathasbeenbuiltatThomasJeersonNationalAcceleratorFacility. diagnosticsforarelativelyhighbrightnesselectronbeam<strong>and</strong>theapplicationsofthesediagnostics tostudysomebeamdynamicsproblems.Thisworkhadasignicantcontributioninthesuccessof neticopticscodesuchasdimad<strong>and</strong>particlepushingcodesuchasparmela. Wehaveimplementedtwotransversephasespacecharacterizationtechniquestostudythephase theemittancedominatedregime.Theformertechniquebasedontransversephasespacesampling usingamultislitmaskhasallowedsomepreliminaryparametricstudiesofthephasespaceof60pC chargeperbunchbeamproducedatthefrontendofa10MeVphotoinjector<strong>and</strong>hasbeencapable toresolveemittanceaslowas1mm-mradinatestinjectorst<strong>and</strong>. Alongwiththetransversephasespace,afullsix-dimensionalcharacterizationofthephasespacehas spacedensityoftheelectronbeamasitisstillinthespace-chargedominatedregime,butalsoin<br />
coherenttransitionradiationproducedbythebunchedelectronbeam.Thisinterferometerhasalso beenusedtoperformparametricstudyofthebunchlengthevolutionversussomeradio-frequency elementthatplayakeyroleinthebunchingscheme. FinallyafullmodelbasedonmultiparticlesimulationoftheIRFELhasbeenelaborated<strong>and</strong>com- beenattemptedbymeasuringbothbunchlength<strong>and</strong>energyspreadoftheelectronbeam.Because<br />
paredwhenpossiblewithexperiments.Atentativeexperimenttomeasureenergyspreadgeneration oftheultra-shortbeamrequiredtodriveafree-electronlaser(typically
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