Improved crystal method for photon beam linear polarization measurement at high energies

A method for photon linear polarization determination based on the measurement of the asymmetry of pairs produced by polarized photons in single crystals within the optimal intervals of pair particle energies is proposed. In difference to the well-known methods the asymmetry in this case is essentially larger. The optimal orientation of crystal is found, which provides the maximal values for analyzing power and figure of merit as well as minimal measurement time.