High Brightness Electron Beam Diagnostics and their ... - CASA

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undulatorvicinity.Wehavenotmanaged,uptothepresentdate,tounambiguouslydemonstrate whetherthiseectwasduetocoherentsynchrotronradiation.Asecondseriesofrunswereper- measurementreportedinthisreport)wouldroughlydoubletheeectprovidedallelsewereequal, formed,whereweconcentratedonthemeasurementofenergyspreadalongthetransportchannel,butthenitstillwouldnotbesignicant.OncethelatticedesignoftheIRFELUpgradehasma- resultinginnoobservation,withintheprecisionofthemeasurement,ofenergyspreadgeneration (alsothisdataweretakenforoneoperatingpointofthelinaconly). Wecanconclude,ataminimum,thatitshouldbepossiblesetupabeamthatwilltransportaround theBatesarcwithoutsignicantgrowthinenergyspread(whichtranslatestonosignicantgrowth inemittance),andthereforefortheFELUpgradeitseemsreasonabletoplanonputtingtheFEL systemsinthebacklegtransferline-abunchchargeof135pC(versusthe60pCusedforthe tured,thenoneshouldbeabletousetheIRDemotosetupabeamattheentrancetotherst ofmeasurements(emittanceandenergyspread)the135pCcase. BatesbendthatmimicstheIRFELUpgradebeamparameters,andtrytoperformthesametype
[2]Y.Shibata,T.Takahashi,T.Kanai,K.Ishi,andM.Ikezawa,\Diagnosticsofanelectronbeam Bibliography [3]C.Hirschmugl,M.Sagurton,andG.Williams,\Multiparticlecoherencecalculationsfor [1]C.L.BohnandS.V.Benson,\RadiofrequencySuperconductivityAppliedtofree-electron ofalinearacceleratorusingcoeherentradiation",Phys.Rev.,E50num.2,pp.1479-1484(1994) lasers",Part.Acc.,69,pp.623-635(1998) [6]L.Wartsky,\EtudeduRayonnementdetransitionoptiqueproduitpardeselectronsd'energie [5]I.M.Frank,\TransitionRadiationandOpticalPropertiesofMatter",Sov.Phys.Uspekhi,8 [4]NodvickandSaxon,\Multiparticlecoherencecalculationsforsynchrotron-radiationemission", num.5,pp.729-742(1966) Phys.Rev.,A44num.2,pp.1316-1320(1991) synchrotron-radiationemission",Phys.Rev.,A44num.2,pp.1316-1320(1991) [9]A.Hofmann,\TheoryofSynchrotronRadiation",reportSSRLACD-NOTE38,StanfordUni- [7]M.L.Ter-Mikaelian,HighEnergyElectromagneticProcessesinCondensedMedia,Wiley- [8]J.D.Jackson,ClassicalElectrodynamics,WileyEdt,NewYork(1975) 30a70MeV.Applicationauxdiagnosticsdefaisceauxdeparticuleschargees",Ph.DThesis, Universited'Orsay,France [10]M.Sands,\ThePhysicsofElectronStorageRings,AnIntroduction",reportSLAC-121,Stanversity,CA(1986)ford(1970)(alsopublishedasreportUS-28,andUniversityofCalifornia,SantaCruz,CA Interscience,NewYork(1972) [13]S.V.BensonandM.D.Shinn,\DriveLaserforaDCphotocathodegun",Proc.Part.Acc. [11]G.Dattoli,andA.Torre,\Free-ElectronLaserTheory",reportCERN89-03,CERN,Geneva, [12]S.V.Benson,\TunableFree-ElectronLasers",inTunableLasersHandbook,AcademicPress Inc.,pp.443-469(1995) (1970)) [14]D.A.Engwall,\HighBrightnessElectronBeamsfromaDC,High-Voltage,GaAsPhotoemis- Conf.'95IEEEcatalog#97CH35843,pp.1052-1054,Dallas(1995) Switzerland(1989)Stanford(1986) sionGun",Ph.DThesis,UniversityofIllinoisatUrbana-Champaign(1998) 167
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HighBrightnessElectronBeamDiagnosti
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eratedupto48MeVpriortothelasingsyst
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IthanktheCEBAFmachineoperators,with
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3.4MeasurementoftheLongitudinalResp
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5.6ZerophasingTechniqueforBunchLeng
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ListofTables 3.2Comparisonofcoecien
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ListofFigures 1.1Comparisonoftheexp
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3.11Momentumcompactionandnonlinearm
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4.18Overviewofthephasespacesampling
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5.16Interferogrammeasuredfordierent
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6.10Comparisonofthermstransversehor
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Chapter1 UVdomainandareplannedtogen
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space-chargeinthelowenergyregime,an
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!Vjitsthevelocity,and!Xjisthepositi
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equation boundarybetweenvacuumandam
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10 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.
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1.0 0.8 0.6 0.4 0.2 E=10 MeV E=42 M
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00000000000000000000000000000000000
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harmonicwithproperchoiceoftheKvalue
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Bu(rms)0.28T ParameterValueUnit Nu
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2.7TheJeersonLabIRproject usedasexp
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Study TheFELdriveraccelerator:Latti
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ParameterValue x -0.178 x(m) 8.331
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Thepurposeofmeasuringthetransverser
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computedusingthelatticeset-upuseddu
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etatronexcitationaspicturedingure3.
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∆ x (mm), Corrector 0F00H ∆ x (
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1 0.5 0 spreadoftheparticlewassetto
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2 1 −5 −3 −1 1 3 5 k (m q −
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Experimentallythecalibrationcoecien
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tioned.FromthetransferfunctioninFig
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Pickup Experiment #2 #3 #4 Simulati
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Fromthesebothmeasurementitispossibl
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. . . . . . . . . . . . . . . . . .
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10 5 Sext. ON Figure3.20:Eectofthes
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spaceabeamthatconsistsofNparticles,
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Asforthegeometricemittanceonecanden
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(a) ceramic radiator beam x-wire be
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and validundertheassumptionofaunifo
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1000 900 800 700 Figure4.4:Steadyst
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Fraction of Beam enclosed within (%
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5 2 2 3 4 5 6 7 8 9 10 0 10 5 2 Foi
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Actuator Inserts Foil and Mirror CI
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shortterm,touseasbeamdensitymonitor
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Alongwiththeseimplementedoperations
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whereiistheerrorontheithbeamsizemea
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Let'sassumethethinlensapproximation
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obtainedviathestatisticalanalysis.T
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20 18 16 . 14 . 12 . Figure4.14:Rel
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100 10 −3 10 −2 10 −1 10 that
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multislits mask (copper) Aluminum F
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TheReductionoftheSpaceChargeconditi
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. . . . . . . . . . . . . . . . . .
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Table4.7:Typicalsystematicerroronem
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180 8 160 6 Figure4.22:Anexampleof2
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4.0 3.5 3.0 2.5 Figure4.24:Emittanc
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Characterization LongitudinalPhaseS
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concentrateonthebeamparametersinthe
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1.1 1 mrad 0.9 5 mrad mainlyduetoth
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Population Population 100000 90000
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Theequation5.8yields: f()=jZ+1 11Xn
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presentanoutlineofthisproofbelow,an
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contrastintheCEBAFmachine,varyingas
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1.5 1 correspondtothevarianceofveco
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Ε’ 2 B Mirror M 2 Ε2 Polarizer
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FinallyitisinterestingtonotethatFou
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Itsautocorrelationis:S(z)=8>:(1=w2)
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Page 157 and 158: σ x (m) x 10−3 5 4 3 2 1 0 0 5 1
Page 159 and 160: BeamDynamicsStudies Chapter6 undula
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Page 169 and 170: ε x (mm−mrad) Nominal 6 4 2 cryo
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Page 191 and 192: [29]J.-C.Denard,C.Bochetta,G.Traomb
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Page 195 and 196: TEM:transverseelectricmagnetic. TOF
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Page 201 and 202: Initialization MAIN Stop INPUT DECK
Page 203 and 204: C.0.6TheDispersionRelationsfor^S(!)
Page 205 and 206: have: Howeveritshouldbenotedthatweh
Page 207: FigureD.1:OverviewoftheRF-controlsy
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