Tapering optimizations for TW level superconducting undulators: summary of simulation results
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Transcript of Tapering optimizations for TW level superconducting undulators: summary of simulation results
Tapering optimizations for TW level superconducting undulators: summary of simulation results
Claudio Emma, Paul Emma, Claudio Pellegrini, Juhao WuSLAC
July 2014
Simulation parameters and tapering optimisation
ρ=9.8535*10-4 Lg1D = 89 cmMing-Xie Parametrization
Kq,0 = 47.5 T/m
Undulator Radiation Beam Electron Beamλu = 1.9 cm λr = 0.324 nm I0 = 4 kA
K = 3.45 Prad = 5 MW εx,εy = 0.4/0.4 μm
Lu = 70.3 m σrad,0 = 22 μm σe = 12.6 μm Nsec = 35 ZR,seed = 10 m E = 7.3 GeV
lFODO = 4.14 m σγ = 1.7*10-4
Lg3d = 0.99 m
Time Dependent Results (parabolic)
Time dependent effects do not spoil bunching as they do after 200 m in NCU
Planar vs. Helical (parabolic electron dist.)
Radiation and Coherence Properties
Coherence area much larger than
radiation beam spot size