arXiv subjects
Publications and source records attributed to A. S. Omelaenko.
We have fitted low- and medium-energy benchmark datasets employing methods used in the MAID/SAID and dynamical model analyses. Independent fits from the Mainz, RPI, Yerevan, and Kharkov groups have also been performed over the low-energy region. Results for the multipole amplitudes are compared in order to gauge the model-dependence of such fits, given identical data and a single method for error handling.
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.