Momentum Analysis of Cosmogenic Muons in the MINOS Detectors
May, 200646 pages
Supervisor:
Thesis: Bachelor - Jeffrey Kevin Nelson()
- William-Mary Coll.
Report number:
- FERMILAB-BACHELORS-2006-02
Experiments:
Citations per year
Abstract:
Proper reconstruction of muon tracks requires that the magnetic fields in the two MINOS detectors be well understood. Previous work revealed problems with the measured ratio of reconstructed cosmic ray µ+ to µ− in certain regions of the detector indicating that the current model of the field for those sections was unsatisfactory. Modeling of the effects of the ends of both detectors and the supermodule gap of the far detector had been left out of the model of the magnetic field because the old finite analysis based method was too memory intensive and slow to use in track reconstruction. A new implementation of the end and supermodule gap effects was created using a piecewise linear fit to the old end effect model to better model the field in the problem regions. The magnetic properties of the detector steel were also characterized to correct additional problems with the detector magnetic field. Cosmic ray muon data for the near detector was also analyzed. The charge sign ratio of the muons analyzed was 1.27 ± 0.074 which was in line with previous results.References(16)
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