Reconstruction of Tracks in a Detector on Drift Tubes and Chambers of the Modified FODS Spectrometer on the U-70 Accelerator Complex

摘要

A procedure for finding the trajectories of charged particles on the FODS (focusing double-arm spectrometer) is described, which includes channel calibration (r(t)-dependence) of drift detectors for calculating the coordinates of particles and reconstruction of tracks. The organization of time measurements and construction of a least-squares functional on their basis is considered. The criteria for selecting candidates for the tracks are discussed. A procedure has been developed for obtaining geodesic corrections for drift chambers and tubes at the analysis of physical events. Accuracies of measuring the coordinates in drift chambers of 600 mu m and chambers on drift tubes of 500 mu m were obtained. The distribution of particle trajectories in the target is given.