The simulation program

The simulation part of the program, the real Brahms, does all the GEANT tracking of particles and computes hits in the sensitive detector volumes. Depending on the detector not all GEANT hits are stored, but they are converted into hits in electronic cells (e.g. in the calorimeter).

The hits are then communicated to the reconstruction program. This can be done either internally, in which case the user has not to do anything, or they can be passed via an intermediate hits file. The structure of the hits file is explained later.