Author: Durfee, C.G.
Paper Title Page
THPAB060 Dispersion Controlled Temporal Shaping of Photoinjector Laser Pulses for Electron Emittance Reduction in X-Ray Free Electron Lasers 3886
 
  • R.A. Lemons, S. Carbajo, J.P. Duris, A. Marinelli, N.R. Neveu
    SLAC, Menlo Park, California, USA
  • C.G. Durfee
    Colorado School of Mines, Golden, USA
 
  Funding: Office of Science DE-SC0014664
Temporal shaping of photocathode excitation laser pulses is a long-sought-after challenge to tailor the phase-space of electrons. The temporal profile of lasers, typically up-converted from infrared to ultraviolet, have significant impact on the distribution and time-evolution of the collective electron bunches. Towards this end, we present a method combining efficient nonlinear up-conversion with simultaneous and adaptable temporal profile shaping through dispersion-controlled sum-frequency generation* resulting in temporal profiles with sharp rise-fall times and flat top profiles. Using the LCLS-II photoinjector as a case study, we demonstrate a reduction in generated electron transverse emittance by upwards of 30% over conventionally implemented temporal profiles. Additionally, we discuss the ongoing experimental implementation of this method and preliminary results.
* R. Lemons, et al. arXiv:2012.00957 [physics.optics] (2020)
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2021-THPAB060  
About • paper received ※ 17 May 2021       paper accepted ※ 08 July 2021       issue date ※ 26 August 2021  
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