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Figure 2
Schematic sketch of the undulator source model with its parameters. [\sigma_{h,v}] is the r.m.s. lateral size of the electron beam, σ the r.m.s. diffraction-limited source size, and [\sigma_{T_{h,v}}] the overall r.m.s. lateral size of the source. [\sigma_\theta] is the natural divergence of the undulator radiation and [\sigma'_{h,v}] the r.m.s. divergence of the electron beam. l0h,v is the lateral coherence length of the source.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 21| Part 5| August 2014| Pages 996-1005
doi:10.1107/S1600577514016269
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