High Brightness Electron Beam Diagnostics and their ... - CASA
High Brightness Electron Beam Diagnostics and their ... - CASA
High Brightness Electron Beam Diagnostics and their ... - CASA
You also want an ePaper? Increase the reach of your titles
YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.
multislits mask (copper)<br />
Aluminum Foil<br />
Incoming<br />
Emittance-Dominated<br />
<strong>Beam</strong><br />
<strong>Beam</strong>lets<br />
D<br />
w<br />
Foranelectronbeam,Dwrites tentialintroducedbythistestparticleisscreenedduetoreorganizationoftheneighborcharges. interceptstheincomingspace-charge-dominatedbeam.Thebeamletsissuedfromtheslitsare Figure4.18:Overviewofthephasespacesamplingtechnique.AnincomingAmultislitmask emittance-dominated.<br />
Tele-photo lens<br />
whereistheLorenzfactor,kBtheBoltzmanconstant,Tbthebeamtemperature,measuredinthe qualitatively,thislengthcharacterizetheregioncenteredaroundatestparticleinwhichthepo- D=s0kBTb<br />
5 mm L=620 mm<br />
CCD detector<br />
onthemagnitudeofDversustheinter-distanceparticleswithinthebeamlinter<strong>and</strong>thebeam beamreferenceframe,ntheparticledensity<strong>and</strong>0isthedielectricconstantofvacuum.Depending size,therearetwomainregimes: InthecaseDtheDebyescreeningwillbeineective<strong>and</strong>singleparticledynamicswilldominate<br />
Thereforetransversespace-chargecontributionisinsignicantifD>>eq,eqbeingtheequivalentbeamradius(eq=[xy]1=2).ForthesimplecaseofaK-Vdistributionthetransverse temperatureisgivenby[41]: toitsnearestneighborsthantothecollectiveeldofthebeamdistributionasawhole. forthecharge<strong>and</strong>theself-eldmaybeused;IfD'linterthenaparticleismoresensible ontheDebyelengthcomparedtotheinter-particlesdistance:IfD>linter,smoothfunction<br />
IntroducingtheAlfvencurrentIA=40mc3 Where~"ndenotesthenormalizedemittance. kBTb=8mc2~"2n e,thepeakcurrentIp=Nec z(withzbeingthebunch<br />
e2n (4.50)<br />
2eq (4.51)
Change language