Monte Carlo Simulations of Timing Structure: Figure 6.b

Figure 6.b

Shower Cascade

Each panel shows a series of different plots for one Monte-Carlo generated 20 GeV gamma ray shower. Thepanel on the left shows the particle tracks of the atmospheric cascade. Tracks in green representelectrons, tracks in red represent positrons.

The right panel shows four different plots for the same shower. Upper Left: Cherenkovphoton arrival times as a function of distance from shower core. This is the time the photon impactsrelative to the arrival time of the primary particle if it had continued at speed c. The colors indicatethe altitude of emission of the photons as described in Figure 1. Upper Right: Arrival timesfor those photons hitting in a 15 m x 13 m area centered on the shower core. Lower Left:Emission altitudes of these same photons. Lower Right: This is a scatter plot of arrivaltimes vs. emission altitude.