Speaker
Dr
Giovanni Perosa
(European X-Ray Free-Electron Laser)
Description
We derive a resonant effective action for the time-dependent free-electron laser. The action treats longitudinal time dependence and finite-bunch effect within a single self-consistent framework. After canonical normalization, the action is shown to be homogeneous under Pierce parameter rescaling. Such property directly yields scaling laws for the field, without explicitly finding or solving the equations of motions.
Within the same framework, we show that the onset of weak superradiance is identified with a dynamical critical point at which the system acquires an emergent scaling symmetry.
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Author
Dr
Giovanni Perosa
(European X-Ray Free-Electron Laser)
Co-authors
Andrei Trebushinin
(European X-Ray Free-Electron Laser)
Gianluca Geloni
(European X-Ray Free-Electron Laser)
Svitozar Serkez
(European X-Ray Free-Electron Laser)