High Brightness Electron Beam Diagnostics and their ... - CASA
High Brightness Electron Beam Diagnostics and their ... - CASA
High Brightness Electron Beam Diagnostics and their ... - CASA
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2.10Anexampleofvariationofthegainversusthebunchlength(A)<strong>and</strong>thetransverse 2.11Anactualtopviewofthe\asbuilt"IRFELdriveraccelerator.............19 2.9Normalizedpoweroftheon-axisundulatorradiationforthetwodierentvalueof emittance(bothx<strong>and</strong>yplane)(B)(theseplotswerecomputedusingtheverysimple 1Dmodelexposedintheprevioussection)........................18 KconsideredfortheIRFEL................................15<br />
3.1Dispersedoverviewofthemainringofthedriveracceleratorcorrespondingtog2.12Simpliedschematicoftheelectronsource:A527nmlaserbeamthatcanbemodulatedbytwoelectro-opticscell(EO1<strong>and</strong>EO2)<strong>and</strong>attenuatedbyarotationalpolarizerilluminatestheGaAsphotocathode.Ejectedphoto-electronsareaccelerated 3.2HorizontalDispersion(topgraph)<strong>and</strong>transversebetatronfunctions(bottom ure2.11.Thepathoftheelectronbeamisindicatedwitharrows............23 throughtotheacceleratingvoltageofnominally350kVbetweenthephotocathode<br />
graph)forthenominalsettingsofthemagneticoptics.................25 <strong>and</strong>theanode........................................21<br />
3.4Exampleofcalibrationofacorrector.Theslopeofthelinearinterpolationis 3.3schematiccutofabeampositionmonitor(BPM)....................27 3.5Betatronphaseadvancebetweeneachcorrectorusedtoperturbtheorbitalongthe 0:0183mm=(G:cm)whichcorrespondstoanangulardeectionof6:54rad=(G:cm).29<br />
3.7Comparisonbetweentheexperimentaldataaftercorrection<strong>and</strong>thesimulatedlattice 3.6Comparisonbetweenthemeasured<strong>and</strong>simulatedlatticeresponseforthesixcorrec- latticeinthehorizontal(leftplot)<strong>and</strong>vertical(rightplot)plane(100meters correspondsapproximatelytotheendofthebacklegbeamline)............30<br />
3.8Comparisonbetweenanenergychangeinducedbeamdisplacementalongthelattice responseforthesixcorrectors(100meterscorrespondsapproximatelytotheendof thebacklegbeamline)....................................32 torsusedduringthedierenceorbitmeasurement(100meterscorrespondsapprox<br />
<strong>and</strong>theresponsetoanangularperturbation.......................33 imatelytotheendofthebacklegbeamline).......................31<br />
3.9<strong>Beam</strong>displacementinthebacklegtransportforarelativevariationof1%ofthe magneticeldoftherstrecirculationarc........................34
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