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

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multislits mask (copper) Aluminum Foil Incoming Emittance-Dominated Beam Beamlets D w Foranelectronbeam,Dwrites tentialintroducedbythistestparticleisscreenedduetoreorganizationoftheneighborcharges. interceptstheincomingspace-charge-dominatedbeam.Thebeamletsissuedfromtheslitsare Figure4.18:Overviewofthephasespacesamplingtechnique.AnincomingAmultislitmask emittance-dominated. Tele-photo lens whereistheLorenzfactor,kBtheBoltzmanconstant,Tbthebeamtemperature,measuredinthe qualitatively,thislengthcharacterizetheregioncenteredaroundatestparticleinwhichthepo- D=s0kBTb 5 mm L=620 mm CCD detector onthemagnitudeofDversustheinter-distanceparticleswithinthebeamlinterandthebeam beamreferenceframe,ntheparticledensityand0isthedielectricconstantofvacuum.Depending size,therearetwomainregimes: InthecaseDtheDebyescreeningwillbeineectiveandsingleparticledynamicswilldominate Thereforetransversespace-chargecontributionisinsignicantifD>>eq,eqbeingtheequivalentbeamradius(eq=[xy]1=2).ForthesimplecaseofaK-Vdistributionthetransverse temperatureisgivenby[41]: toitsnearestneighborsthantothecollectiveeldofthebeamdistributionasawhole. forthechargeandtheself-eldmaybeused;IfD'linterthenaparticleismoresensible ontheDebyelengthcomparedtotheinter-particlesdistance:IfD>linter,smoothfunction IntroducingtheAlfvencurrentIA=40mc3 Where~"ndenotesthenormalizedemittance. kBTb=8mc2~"2n e,thepeakcurrentIp=Nec z(withzbeingthebunch e2n (4.50) 2eq (4.51)
lengthandNthenumberofparticleswithinabunchN'n2eqz)yieldsfortheexpressionofthe Henceameasureofthedegreeofself-elddominanceoversingleparticledynamicsisdeducedfrom theratioR=2eq=2D: Debyelength: R'I 2D=2~"2nIA 2IA()(~"2n) IP 2 (4.52) CollimatingthebeamwithaslitwillscaleRby,denedastheratiooftheslitrms-width(=p12) totherms-beamsize: whereisthebeamsize(assumedtoberound). ! (4.53) Therefore,inthecaseofaroundbeam,andundertheassumption
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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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Page 60 and 61: Experimentallythecalibrationcoecien
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Page 70 and 71: 10 5 Sext. ON Figure3.20:Eectofthes
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Page 86 and 87: Actuator Inserts Foil and Mirror CI
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Page 90 and 91: Alongwiththeseimplementedoperations
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Page 94 and 95: Let'sassumethethinlensapproximation
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Page 109 and 110: Table4.7:Typicalsystematicerroronem
Page 111 and 112: 180 8 160 6 Figure4.22:Anexampleof2
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Page 115 and 116: Characterization LongitudinalPhaseS
Page 117 and 118: concentrateonthebeamparametersinthe
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Page 121 and 122: Population Population 100000 90000
Page 123 and 124: Theequation5.8yields: f()=jZ+1 11Xn
Page 125 and 126: presentanoutlineofthisproofbelow,an
Page 127 and 128: contrastintheCEBAFmachine,varyingas
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Page 131 and 132: Ε’ 2 B Mirror M 2 Ε2 Polarizer
Page 133 and 134: FinallyitisinterestingtonotethatFou
Page 135 and 136: Itsautocorrelationis:S(z)=8>:(1=w2)
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Figure5.23:picturaleectoflongitudin
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. .. .. . .. . . .. . .. . . .. . .
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σ x (m) x 10−3 5 4 3 2 1 0 0 5 1
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BeamDynamicsStudies Chapter6 undula
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x,y (mm) 6.0 4.8 3.6 2.4 1.2 x y 0.
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Space Charge over Emittance Ratio (
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numericalsolution[56].Thisapproxima
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0.03 . .... . .. ... . .. ..... . .
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ε x (mm−mrad) Nominal 6 4 2 cryo
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2.2 2 1.8 Figure6.10:Comparisonofth
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6 4 2 Figure6.12:\R55"transfermapfo
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10 1 5 10 0 500 1000 1500 2000 2500
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EnergySpread(%) BunchLength(mm) Par
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15 Effect of RMS energy Spread 10 F
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6.4.4BunchSelfInteractionviaCoheren
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100 -2.0 -1.5 -1.0 -0.5 0.0 0.5 1.0
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Inthesecondseriesofrun,wewereableto
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Conclusion Chapter7 Therecirculator
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[2]Y.Shibata,T.Takahashi,T.Kanai,K.
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[29]J.-C.Denard,C.Bochetta,G.Traomb
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[65]B.C.Yunn,\ImpedancesintheIRFEL"
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TEM:transverseelectricmagnetic. TOF
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B.2Anoteonspacecharge Wedenetheslop
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B.3.3PARMELA FeaturesofJeersonLabVe
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Initialization MAIN Stop INPUT DECK
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C.0.6TheDispersionRelationsfor^S(!)
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have: Howeveritshouldbenotedthatweh
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FigureD.1:OverviewoftheRF-controlsy
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High Brightness Electron Beam Diagnostics and their ... - CASA

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