Statistics – Applications
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995eidt.book.....w&link_type=abstract
Experimental investigation in the direction- and time-distribution of cosmic ray muons., by Wentz, J.. Forschungszentrum Karlsr
Statistics
Applications
Muons, Cosmic Rays, Scintillation Counters, Proportional Counters, Monte Carlo Method, Data Acquisition, Directivity, Time Measurement, Applications Programs (Computers), Particle Mass, Cosmic Ray Showers
Scientific paper
For the detection of cosmic ray muons a detector system, consisting of four large multiwire proportional chambers (8.8 m2 each) and two segmented trigger planes of scintillation counters has been built. The system performs the simultaneous measurement of tracks and arrival times. For the data acquisition and analysis the program MYDAS was developed. It is based on a system-independent graphical user interface and allows various event displays. With extensive test measurements the operational parameters of the chambers are optimized. It is shown, that Argon-Methane as operation gas is very suitable. The position resolution and the efficiency, in dependence of the crossing angle and the delay time are determined. The system is used to measure the directional intensity and the flux of muons, both integral for energies above the system threshold. The investigation of muons, decaying in the detector system shows that by a simple time measurement, it is possible to determine the charge ratio of cosmic muons by the different behavior in matter. Studies of double muon events in the detector system are used to determine the time spectra of delayed muons in extensive air showers. Simulations demonstrate that the mean delay time is dependent on the mass of the primary particle. The experimental results are in agreement with a domination of protons as primary particles at energies about 1014 eV.
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