Backscattering of Laser Radiation on Ultra-Relativistic Electrons in Transverse Magnetic Field: Evidence of Photon Interference in a MeV Scale

Abstract

The experiment on laser light backscattering on relativistic electrons was carried out at the VEPP-2000 collider. Laser radiation (λ0 10.6 μm) was scattered head-on the 990 MeV electrons inside the dipole magnet, where an electron orbit radius is about 140 cm. The energies of backscattered photons were measured by the HPGe detector. It was observed experimentally that due to the presence of magnetic field, energy spectrum of backscattered photons differs from the Klein-Nishina cross section. The explanation of the effect is proposed in terms of classical electrodynamics. Moreover, it appears that the exact QED predictions for the phenomenon were done more than 40 years ago.

arXiv comment4 pages, 5 figures

References in corpus (5)

• Experimental investigation of high-energy photon splitting in atomic fields
• The Longitudinal Polarimeter at HERA
• The beam energy measurement system for the Beijing electron-positron collider
• First electron beam polarization measurements with a Compton polarimeter at Jefferson Laboratory
• Nonlinear effects in Compton scattering at photon colliders

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