Simulated events are of great importance in checking and/or correcting for non-trivial or unforeseen detector or physics effects, as well as comparing detector performance with expectations. With the possible exception of the effect being studied, simulated events should be as close as possible to real data events. Hence the primary goal of the simulation programme is to model closely the physical interactions involved, the detector performance, and the event reconstruction.
The DELPHI simulation program, DELSIM , is composed of three main components: generators, tracking, and detector response.
Since the output of DELSIM closely models the real raw data produced by the DAS, DELANA can be used directly, thus well-modelling the real data reconstruction. Like DELANA, DELSIM uses CARGO to store the detector geometry, material descriptions, and sensing device parameters (e.g. noise and efficiency). In principle, this allows simulated events to be produced for the current or any previous detector configuration.Tim Adye 2002-11-06