Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-06-18
Astronomy and Astrophysics
Astrophysics
To be presented at the XXVIII International Cosmic Ray Conference, Tsukuba, Japan
Scientific paper
Project GRAND is a 100m x 100m air shower array of position sensitive proportional wire chambers (PWCs) located at 41.7 degrees North and 86.2 degrees West at an elevation of 220m above sea level. Its convenient location adjacent to the campus of the University of Notre Dame makes it a good training ground for students. There are 64 stations each with eight 1.29 m^2 PWCs. The geometry of the stations allows for the angles of charged secondaries to be determined to within 0.26 degrees in each of two orthogonal planes; muons are differentiated from electrons and hadrons by means of a steel plate. Two triggers are run simultaneously: a multiple hit coincidence trigger, rich in extensive air showers, and a single track trigger, rich in secondary muon tracks. The former trigger is sensitive to primary energies greater than ~100 TeV, the latter to energies greater than ~10 GeV.
D'Andrea Carlos
del Puerto Marie Lopez
Poirier John
Strahler Erik
Vermedahl Jon
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