Cosmic Ray Telescope Measurements of Muon Flux at Mu2e

The Cosmic Ray Veto group at the University of Virginia is designing and constructing the Cosmic Ray Veto, to reject background events in the Mu2e experiment which were caused by cosmic rays. In order to confirm previous simulations and to add to our understanding of flux at angles close to the horizon we needed to measure the cosmic ray muon flux at the experiment site. Therefore a cosmic ray telescope large enough to collect a substantial amount of data in a short time, yet with sufficient resolution to distinguish between angles close to the horizon was constructed. Measurements were taken at the Mu2e detector hall and compared to expected rates.