Figure 6
From: Isolated terawatt attosecond hard X-ray pulse generated from single current spike
FEL simulation results in the PAL-XFEL configuration. (a) Optimized current spike profile of the electron beam with 2 um, 0.7 mJ few-cycle laser. Phase space distribution corresponding to the current spike is plotted in the inset. (b) Undulator parameter of optimized tapering. (c) Peak radiation power averaged over five simulations with error bars along the undulator length. (d) Representative shape (blue) and fluctuation (grey) of a radiation pulse at the end of the undulator line.
