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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5.6EectofdierentkeyelementsinthebunchingprocessoftheelectronsontheBFF. 5.5Eectoftransversebeamsizeonthe3D-BFF.Forthreedierenttypeofbunch TheBFFcorrespondingtothenominalsettingsfortheRFelements(solidline)is width.............................................100 (ellipsoidal,pancake<strong>and</strong>linechargebunch),theBFF(A),theCTR(B)<strong>and</strong>CSR assuminganangularacceptanceof0:3rad<strong>and</strong>aregivenfora20%frequencyb<strong>and</strong>- (C)powerspectrumarenumericallycomputed.Thepowerspectrumarecomputed<br />
5.7SimpliedschematicsofaGolaycell(A)<strong>and</strong>theassociatedsignalacquisitionelec- 5.8Scalingofcoherenttransitionradiationpowerversuschargeperbunch.Thecharge tronics(B)..........................................104comparedwiththecaseswherethebuncher(dottedline),therstcavityinthein- perbunchischangedbyvaryingtheintensityofthephotocathodedrivelaser.The jector(greyline)<strong>and</strong>thephotocathodedrivelaser(dottedline)areoperated+3deg<br />
circlesaretheexperimentaldatapoint<strong>and</strong>thedashlineistheresultofaquadratic o<strong>their</strong>nominalsettings..................................102<br />
5.10CTRsignalversusbeamequivalenttransversespotsizepxy.Theerrorbars 5.9CTRsignalversustheSRFlinacoverallphase.Asthelinacphaseisvariedthe bunchlengthattheundulatorvicinityischanged....................106 interpolationoftheexperimentalpoint..........................105<br />
5.11Overviewoftheopticstoguidethecoherenttransitionradiationemittedfroman 5.12SimpliedschematicsoftheMichelsonpolarizinginterferometer............109 5.13LimitationofsomeopticalcomponentsintheMichelsonpolarizinginterferometer. correspondtothevarianceofveconsecutivemeasurements..............107 aluminumfoiltotheentranceoftheinterferometer...................108<br />
5.14Completeinterferogramstakenfewminutesapart:In(A),theghost-pulsewasnot totallysuppressedwhilein(B)itwas.(C)givesthedierencebetweenthetwo theGolaycellentrancewindow...............................114 previousplots(A)-(B)..................................125 componentperpendiculartothewires,<strong>and</strong>T[E]gcisthetransmissioncoecientof R[Ek]wgisthereectioncoecientofthewiregridfortheelectriceldcomponent paralleltothewires,R[E?]wgisthereectioncoecientofthewiregridforthe<br />
5.15FinescanofthecentralpartoftheinterferogrampresentedinFig.5.14(A).The FWHMof110m(B).Thebaselineis2.7V.......................126<br />
aninterferogramofthesumofasquare<strong>and</strong>gaussi<strong>and</strong>istributionbothhavinga fromagaussi<strong>and</strong>istribution(solidline)<strong>and</strong>asquaredistribution(dashline)bothof thesedistributionhavethesameFWHM(A).Theinterferogramiscomparedwith experimentalinterferogram(circle)iscomparedwithaninterferogramgenerated
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