Improved Crystal Method for Photon Beam Linear Polarization Measurement at High Energies

TL;DR

This paper proposes an enhanced method for measuring photon beam linear polarization at high energies using asymmetry in pair production in crystals, achieving larger asymmetries and optimized measurement conditions.

Contribution

It introduces a novel approach leveraging pair production asymmetry in crystals, improving polarization measurement accuracy and efficiency at high energies.

Findings

Larger asymmetry in pair production compared to traditional methods

Optimal crystal orientation maximizes analyzing power

Reduced measurement time for polarization determination

Abstract

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 particles 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.