General
The fast simulator AliTRDv0 is mainly intented to provide the TRD geometry for other detector groups and is the default version of the TRD in the Config.C. The creation of hits has to be switched on explicitly (AliTRDv0::SetHits()). The StepManager() function will then create a hit in each detector plane whenever a particle crosses the pad plane of a chamber. The result looks like this:
Creation of space points
With the help of the class AliTRDclusterizerV0 the hits produced by AliTRDv0 can be transformed into reconstruced points of the type AliTRDrecPoint. This can be useful e.g. for simple track matching studies and has already been used in the TPC proposal. See the macro fastClusterCreate.C on how to create reconstructed points.The algorithm simply applies a gaussian position smearing to the hit position according to the expected resolution in rphi-direction. With AliTRDclusterizerV0::SetRphiSigma() this resolution can be modified (default: 0.02 cm). The z-direction is smeared uniformly over the length of a pad. Additionally two hit that come too close to each other in rphi-direction are merged in one point. The maximal allowed distance can be set by AliTRDclusterizerV0::SetRphiDist().
Page maintaned by Christoph Blume. Last modification: 02/06/04 (A.Andronic)