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title: TW X-RAY FREE ELECTRON LASER OPTIMIZATION BY TRANSVERSE PULSE SHAPING
format: conference proceeding
conference: FEL 2014 36th
year: 2014
3 authors: C. Emma | C. Pellegrini | J. Wu
abstract: We study the dependence of the peak power of a 1.5 Å TW, tapered X-ray free-electron laser on the transverse electron density distribution. Multidimensional optimization schemes for TW hard X-Ray free electron lasers are applied to the cases of transversely uniform and parabolic electron beam distributions and compared to a Gaussian distribution. The optimizations are performed for a 200 m undulator using the fully 3-dimensional FEL particle code GENESIS. The study shows that the flatter transverse electron distributions enhance optical guiding in the tapered section of the undulator and increase the maximum radiation power from a maximum of 1.56 TW for a transversely Gaussian beam to 2.26 TW for the parabolic case and 2.63 TW for the uniform case.
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