Title: Simulations of a Modular Cosmic Ray Test StandAuthor: Kolby Kiesling for the ACU Nuclear Physics Research Group

The modular cosmic ray test stand is used to determine the efficiencies of prototype detectors through tracking cosmic ray muons. The purpose of the cosmic stand is to test prototype detectors at ACU for use either locally or on experiments at national laboratories. The cosmic ray stand is designed as four segmented plastic scintillators with photomultiplier tubes (PMTs) located on both ends of each scintillator for the upper and lower planes. The data acquisition system (DAQ) records the timing differences of waveforms to generate 2D cosmic ray positions at each plane that is used to reconstruct 3D cosmic ray flight paths. The simulation, written in parallel to construction of the stand, produces expected cosmic ray rates of the stand. A key feature of the simulation is its ability to simulate optimal separation distances and angle orientations of the stand when testing a prototype detector. The data from the completed test stand agrees with expected cosmic rates from simulations. This presentation will  describe the design, construction and simulation of the stand, as well as cosmic ray rate comparisons between data and simulations.