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Figure 8
(a) FEL average power and (b) relative energy spread along the undulator with 10 kW pulsed seeding radiation and 0.2% initial energy spread. 1 kW average power is achieved before 100 m undulator length and energy spread increase is negligible.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 27| Part 4| July 2020| Pages 864-869
https://doi.org/10.1107/S1600577520005676
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