Brief Description of Input and Output Files

Running shower requires three input files:

• cross-section data: Text data file originating from multiple PEGS4 runs which provides the physics of the simulation.

• input beam coordinates: SDDS-format file containing initial coordinates, and energy of the particles. Other parameters, such as PowerOfInitialBeam, used to calculate absorbed dose rate, may be defined here.

• geometry definition: File containing namelist type commands defining the geometry of the problem, i.e. dimensions and material composition.

There are three types of output files:

• output beam coordinates: Coordinates of all particles crossing a bounding plane of a region defined in the geometry file. The file name is specified in region definition. The data may be used for quantitative analysis of a shower, or used as input file to another run of shower. Particles that go out-of-bounds or entering an undefined region of space, may be recorded in separate files defined in the command line.

• shower trajectory: Coordinates of trajectories of all particles produced in a shower run, including those that are created and eventually get absorbed.

• summary: Lists quantities related to each region defined, such as the total energy absorbed.

• line segment geometry: Contains coordinates of all line segments of the shapes defining the geometry of the problem. Most useful when overlayed on shower trajectory plots.