EMCalSystem

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• Defines a LayeredTube (EMCalBarrel) from the input ascii file spec for barrel and two SlicedCones (EMCalEndcap) for the endcaps. Layers are added for each from specs from the ascii file.
  • a very thin first layer, composed of air, is inserted in each subdetector so that the MCParticle position at the front face of the calorimeter can be stored.
  • the SlicedCone allows the endcaps to have inner radii follow a polar angle boundary.
• Contains the digitized hit map CellMap, an STL map, based on the CellArray templated class (allowing reuse by HADCalSystem).
  • Digitizer and DigitizerInterface objects are created for each layer via CellArray, with EMCalid and MCvsE as the template arguments; the layer number is also passed in. Insensitive layers are given a special layer number (99999).  Each digitizer references the main list in EMCalSystem.
  • EMCalId takes the space point and layer number to calculate a unique identifier that is used as the key in the map. It uses the segmentation values given in the input ascii file to create the hit ID (see Reference Geometry).
  • Hit information is stored in MCvsE, which contains the total deposited energy as well as another map storing the energy deposited per hit per MCParticle.
  • addLayer keeps track of the 'shower initiator. All shower particle energy is then assigned to that initiator.
• Contains a 2nd STL map, MCentryMap, which has the MCParticle* as the key. This second map deals with the entry point discussed above.
  • Digitizer and DigitizerInterface objects are created via MCentryDig. Its addHit function checks for outgoing particles and stores their positions and drc's via MCentry.

R.Dubois Last Modified: 01/13/04 12:55