Sources of stochastic noise
Some things are controlled by the RNG:
• The 20k pions of the initial rod dataset
• Rotations of these pions about the axis
• Random delays of this dataset to simulate
1ns RMS incoming proton pulse *
• Decays of pions and muons *
* These are weighted, so they each happen 3x
in the current simulations.  Old simulations
had the decay 10x and no delays.