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The coherent Bragg scattering of photons converted from solar axions insidecrystals would boost the signal for axion-photon coupling enhancingexperimental sensitivity for these hypothetical particles. Knowledge of thescattering angle of solar axions with respect to the crystal lattice isrequired to make theoretical predications of signal strength. Hence, both thelattice axis angle within a crystal and the absolute angle between the crystaland the Sun must be known. In this paper, we examine how the experimentalsensitivity changes with respect to various experimental parameters. We alsodemonstrate that, in a multiple-crystal setup, knowledge of the relative axisorientation between multiple crystals can improve the experimental sensitivity,or equivalently, relax the precision on the absolute solar angle measurement.However, if absolute angles of all crystal axes are measured, we find that aprecision of 2-4 degrees will suffice for an energy resolution of$\sigma_E=0.04{\rm E}$ and a flat background. Finally, we also show that, givena minimum number of detectors, a signal model averaged over angles cansubstitute for precise crystal angular measurements, with some loss ofsensitivity.

Solar Axion Search Technique with Correlated Signals from Multiple Detectors