Technique for searching for and reconstruction of neutrino interactions in the emulsion target of the SCAP spectrometer

A vertex-localization algorithm for the neutrino-interaction in nuclear emulsion is described. Emulsion is used as a detector-target in the hybrid SCAP spectrometer with a streamer chamber (SC) as a track detector. As has been shown, with the SC it is possible to measure momenta with an accuracy sigma(p)/p congruent to 7% and track slopes in the horizontal and vertical SC planes with the accuracies sigma(phi) congruent to 17 mrad and sigma(lambda) congruent to 20 mrad, respectively. Under these conditions, the algorithm under consideration provides the vertex localization with an accuracy sigma(y) = 700 mu m, sigma(z)= 1200 mu m, and sigma(x) = 1700 mu m. This accuracy is sufficient for the efficient search for the vertex in the emulsion layers. The procedure of searching for the vertex is described.