title: Low-intensity nonlinear spectral effects in compton scattering.
abstract: Nonlinear effects are known to occur in Compton scattering light sources, when the laser normalized potential A approaches unity. In this Letter, it is shown that nonlinear spectral features can appear at arbitrarily low values of A, if the fractional bandwidth of the laser pulse Δϕ⁻¹ is sufficiently small to satisfy A²Δϕ≃1. A three-dimensional analysis, based on a local plane wave, slow-varying envelope approximation, enables the study of these effects for realistic interactions between an electron beam and a laser pulse, and their influence on high-precision Compton scattering light sources.
authors.affiliation: Lawrence Livermore National Laboratory, Livermore, California, 94550, USA.
authors.forename: Frederic V
authors.initials: FV
authors.lastname: Hartemann
authors.forename: Félicie
authors.initials: F
authors.lastname: Albert
authors.forename: Craig W
authors.initials: CW
authors.lastname: Siders
authors.forename: C P J
authors.initials: CP
authors.lastname: Barty