Speaker
Tianzhe Xu
(SLAC National Accelerator Laboratory)
Description
Formation of current spike in electron bunch has direct implication for attosecond pulse generation in XFEL. In this paper, we present start-to-end simulation for tunable, short current spike generation in the LCLS copper linac using photocathode laser shaping. Our approach uses two stacked laser pulses—a long and a short pulse—to imprint a small modulation in the electron bunch as it is created in the injector. This initial modulation is then amplified as the bunch travels through the downstream bunch compressors, ultimately forming a sharp current spike. We also discuss how different shapes of the initial laser pulses influence the final current profile and the efficiency of spike generation.
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Author
Tianzhe Xu
(SLAC National Accelerator Laboratory)
Co-authors
Agostino Marinelli
(SLAC National Accelerator Laboratory)
Aliaksei Halavanau
(SLAC National Accelerator Laboratory)
Nicolas Burdet
(SLAC National Accelerator Laboratory)
River Robles
(Stanford University)
Thomas Jogand-Coulomb
(SLAC National Accelerator Laboratory)
Veronica Guo
(Stanford University)