Double free-electron laser oscillator for photon-photon collisions

A. Torre, G. Dattoli, I. Spassovsky, V. Surrenti, M. Ferrario, E. Milotti

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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 γ-γ scattering cross section. An estimate of the collision rate in definite device configurations is provided. © 2013 Optical Society of America.
Original languageEnglish
Pages (from-to)2906 - 2914
Number of pages9
JournalJournal of the Optical Society of America B: Optical Physics
Issue number11
Publication statusPublished - 1 Nov 2013
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Atomic and Molecular Physics, and Optics

Cite this

Torre, A., Dattoli, G., Spassovsky, I., Surrenti, V., Ferrario, M., & Milotti, E. (2013). Double free-electron laser oscillator for photon-photon collisions. Journal of the Optical Society of America B: Optical Physics, 30(11), 2906 - 2914.