Position Determination of High Energy Photons in Lead Glass

Two 25 element SF5 lead glass Cerenkov counter arrays have been used in the study of photon and π° production in pN collisions at Fermilab. The method used to identify shower patterns, and the determination of the position of the photon in the lead glass arrays in the energy range 2-32 GeV is presented. The method enables the spatial position of photons in this energy range width to be measured with a resolution of π = 0.25 inches.