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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σ x (m)<br />
x 10−3<br />
5<br />
4<br />
3<br />
2<br />
1<br />
0<br />
0 5 10 15 20<br />
1<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
0 5 10 15 20<br />
Quadrupole Strength (m −2 7<br />
6<br />
5<br />
0 5 10 15 20<br />
1<br />
0.98<br />
0.96<br />
0.94<br />
0.92<br />
0.9<br />
0 5 10 15 20<br />
)<br />
Quadrupole Strength (m −2 <strong>and</strong>=2%(bottomright) beamsizecontributionduetodispersiononlywiththetotalbeamsizefor=0:2%(bottomleft) thebeamsizecontributionduetodispersiononly.Thebottomplotspresenttheratioofthe variationinthecenterofthebunchcompressorversustheexcitationofanupstreamquadrupole Figure5.28:Comparisonfor=0:2%(topleft)<strong>and</strong>for=2%(topright)ofthebeamrmssize usingdimadsimulation(solidlines),usingEqn.(5.57)(crosses).Thedashedlineontheseplotsis<br />
)<br />
Figure5.29:Schematicsoftheavailablediagnosticsintheundulatorregionformeasuringthe longitudinalemittance.<br />
Undulator Magnet<br />
OTR foil<br />
OTR foil<br />
e- beam<br />
from linac<br />
CTR foil<br />
Chicane 1 (Compressor)<br />
Chicane 2 (Decompressor)<br />
σ x (δ)/σ x (no units)<br />
x 10−3<br />
10<br />
9<br />
8
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