This describes the SIMDET V4.01 standard output structure.
The output file starts with a single file header of 10 words. Each event starts with the number of generated particles NGENPA, which is followed by a record of 13 words for each particle. According to the user's choice, the whole event history (HIST 1) or only the stable particles which might give a response in the detector are covered.
The number of energy flow objects, NEFLOW, then follows. For each object, blocks of records follow, describing status information, best estimates, generator information, charged particles, calorimeter clusters and muons from the muon system, in this order.