Sergio Petrera

Detector Modeling in astroparticle physics

Astroparticle physics experiments use a large variety of detectors. Usually the signals detected are remotely related to the particles and the physical phenomenon under study. Apart astroparticle physics searches in space, the observation is always indirect. This means that one has to infer primary physics parameters from secondary particles. Examples of this kind are e.g. neutrino detectors in underground experiments and ground based cosmic ray experiments.

This lecture will describe how detectors are modeled in astroparticle physics experiments. The particles impinging the apparatus are individually followed, the resulting signals are generated, the trigger algorithms which generate their data acquisition are reproduced. For this purpose experiment specific or general purpose (e.g. GEANT) simulation codes are used. The output of these codes emulate real data in order to be processed through the standard data processing of the experiments.

Examples will be shown for underground experiments and ground based cosmic ray experiments. Modeling details will be shown for the Pierre Auger experiment where two different detecting techniques are exploited and combined to reconstruct cosmic ray primaries.