JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. B, OPTICAL PHYSICS
Abstract
In view of a quantum electrodynamics test, a "double" free-electron laser configuration is proposed.
The device is conceived in order to produce two laser beams in the same cavity by
two counterpropagating electron beams. The latter are in turn exploited to produce gamma
photons by backward Compton scattering of the intracavity FEL radiation itself. The collision
rate of the backscattered photons is investigated in some detail in the low-energy region for the
photon-photon cross section as well as at the relevant peak.
