Abstract
A FORTRAN IV program system has been completed, which allows the automatic recognition, space reconstruction and topological interpretation of arbitrary elementary particle interactions. Normal input to the program is in the form of a sequence of uncorrelated line elements, into which track chamber photographs are decomposed e.g. by a PEPR film measuring device. The output can be obtained in the form of standard input to the kinematics program GRIND or to the geometry program THRESH - in both cases either containing all tracks on the film or just selected event topologies. The program makes complete ionization analysis of all tracks. In its normal mode the program does not need any human scanning or premeasurement of the film. An optional minimum guidance mode is incorporated, which is useful for experiments where very short tracks are numerous. The program can run in 85000 words of core storage, it takes 9–11 sec per frame of CPU time on an IBM/360–65.75% of all K − interactions in hydrogen at 670 MeV/ c were found and completely reconstructed in space using the automatic mode, for the two-prong event type an efficiency of 80% was obtained. Some examples of the program's operation are presented.
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