Editing Geant4 Cosmic Ray Detection Simulation (section)

===Finding Theta in a Different Manner===

This data had a greater curvature. The curvature in the Geant simulation was about 60%, whereas the curvature in the experiment was about 22%. Since the curvature was so much greater in the simulation, it was figured that much of the data in the actual experiment was being skewed by the resolution of the experiment. After this, it was decided that some of the difference in curvature was due to how theta was being measured in the simulation. In the experiment, theta was found using the difference between the top and bottom scintillators. However, in the Geant simulation, theta was found using just the top scintillator. So, another method to find theta using both scintillators was found and executed. This method involved picking a point randomly from the top scintillator and a point randomly from the bottom scintillator. Then, the momentum magnitude in the x direction was found to be the x location of the point on the bottom scintillator subtracted from the x location of the top scintillator. The y direction momentum was found in the same method as the x direction. The momentum in the z direction was just distance between the two scintillators. Finally, the slope was found in all three directions and traced back to the point where it should begin in order to hit both scintillators. This point was then used as the starting point for the particle in the simulation. After finding the starting position, a new theta was found using the two scintillators. The data, as shown below, did not yield the same results as the experiment. Even with the new method of finding theta, the simulation was still too accurate when compared with the experiment. 


[[File:EnergyvTheta8.png|center|frame|Two Dimensional Histogram of Energy Deposition versus Theta]]