Abstract

The ROKK-1M facility generates high energy polarized γ-ray beams by backscattering of laser light against the high energy electron and positron beams of the VEPP-4M collider. The facility design allows to obtain backscattering of laser light on electron and positron beams separately or simultaneously. Tagging and/or collimation is applied to select a narrow energy band from the γ-quanta spectrum. Operating in a laser polarimeter mode, the ROKK1-M facility is able to measure transverse and longitudinal polarization of the electron and positron beams in the VEPP-4M collider. A description of the facility and achieved γ-ray beam parameters are presented in this paper.

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