Polarization of the Tagged Compton Backscattered Laser Photons. Results of Monte Carlo Simulation

Polarization characteristics of the gamma beam obtained by the Compton back scattering of laser photons on high energy electrons are evaluated by Monte-Carlo simulations. It is assumed that outgoing photons are tagged; the energy dispersion of the tagging photons and emittance of the initial electrons are taken into account. Dependence of the final photon polarization parameters on measured photon energy is obtained. It is shown that polarization of final photons is decreasing with change for the worth of the tagging energy resolution. Calculations have been applied for the storage ring SIBERIA-2 at Kurchatov Institute. The obtained results indicate a reasonability for construction of gamma-polarimeters on existing and planned facilities for the on-line measurement of the final photon beam polarization.