hide
Free keywords:
Physics, Plasma Physics, physics.plasm-ph
MPINP:
Research group K. Z. Hatsagortsyan – Division C. H. Keitel
Abstract:
The impact of the carrier-envelope phase (CEP) of an intense multi-cycle
laser pulse on the radiation of an electron beam during nonlinear Compton
scattering is investigated. An interaction regime of the electron beam
counterpropagating to the laser pulse is employed, when pronounced high-energy
x-ray double peaks emerge at different angles near the backward direction
relative to the initial electron motion. This is achieved in the relativistic
interaction domain, with the additional requirements that the electron energy
is much lower than that necessary for the electron reflection condition at the
laser peak, and the stochasticity effects in the photon emission are weak. The
asymmetry parameter of the double peaks in the angular radiation distribution
is shown to serve as a sensitive and uniform measure for the CEP of the laser
pulse. The method demonstrates unprecedented sensitivity to subtle CEP-effects
up to 10-cycle laser pulses and can be applied for the characterization of
extremely strong laser pulses in present and near future laser facilities.
