Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 30, Issue 11, Pages 2906-2914Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.30.002906
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In view of a quantum electrodynamics test, a double free-electron laser (FEL) oscillator is proposed as a possible device for head-on photon-photon collisions in vacuum. The oscillator 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. In view of an effective device design, specific ranges of values for the various parameters, that characterize the system, are individualized for operation at the maximum of the gamma-gamma scattering cross section. An estimate of the collision rate in definite device configurations is provided. (C) 2013 Optical Society of America
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