Computer Science
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993stin...9419506m&link_type=abstract
Unknown
Computer Science
Cosmic Ray Showers, Hadrons, Ionization Chambers, Muons, Particle Tracks, Proportional Counters, Actuators, Calorimeters, Electromagnetic Radiation, Monte Carlo Method, Pions, Scintillation Counters, Selectivity, Spatial Resolution
Scientific paper
The cosmic ray experiment KASCADE (German acronym for Karlsruhe Shower Core and Array Detector) designed for measuring simultaneously the electromagnetic, muonic, and hadronic components of extensive air showers to determine the primary cosmic ray mass composition in the energy range 300 Tev to 100 Btu is described. Beneath the central hadron calorimeter of this experiment, measurements of muons with an energy threshold of 2 GeV are planned. Four large position sensitive multi-wire proportional chambers were brought into operation after the required supply units were installed. This test setup was extended with a trigger system for cosmic ray muons. The trigger allows muon detection efficiencies and the spatial resolution of the chambers to be measured. To enhance the content of multiple track events in the data a trigger system for air showers was required. A small detector array was installed with the possibility to determine roughly the arrival direction of the shower. For that configuration of chambers an algorithm for track reconstruction was developed. It led to satisfying results for single and double track events. It is demonstrated that the determination of hits with only one chamber is influenced by the ambiguities resulting from the chamber layout. In addition this effect is shown to be enhanced by electronic noise and electromagnetic background. An extension with a time measuring system of an accuracy better than 2 ns allowed the arrival times of the muons to be measured for some events. The resulting arrival time distribution could be qualitatively understood.
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