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Figure 11
x-polarization: bunching coefficients (a) and FEL harmonic power (b) for the phase shifted FEL simulated for LCLS `low energy' beam E = 4.3 GeV and undulator (21)[link] for h = 3, l = 1, d1 = 1, d2 = 0.4. Harmonics: n = 1, red lines; n = 3, green lines; n = 5, blue lines. Subharmonics of the third dominant harmonic: n = 3 × 3, dashed lilac line; n = 5 × 3, dotted pink lines. The bunching for the weak fifth harmonic is omitted for clarity.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 27| Part 6| November 2020| Pages 1648-1661
https://doi.org/10.1107/S1600577520012230
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