Physics of Superpulses in Storage Ring Free-Electron Lasers
Figure 3
Four Poincaré plots (electrons are red dots) in (δ, ζ) phase space during the superpulse (parameters are as in
Figure 1). The clips
show the ζ-profiles of the optical power (blue) with power scales 10 W for turn 1, 10 MW for turn
100, and 1 GW for turns 200 and 250. The Turn 200 plot has additional clip on the right with the FEL energy diffusion
function. The RMS length of optical pulse is σ opt = 0.35
at turn 200. The circle and arrow show the trajectory of synchrotron motion for
a particle with as = 10.
