2020 Session 6 : Exercise

Code for download: session6_start.tar.gz

Exercise 6a:

• With use of G4AnalysisManager
  (see example B4/B4d ):
  1. Create & fill histogram
     • Define a 1D histogram for the energy deposited per event for each calorimeter layer
     • Implement filling of histograms in the EDEmCalorimeterSD::EndOfEvent() function.
       Hint:
       To access the i-th calorimeter hit from fHitsCollection:
       EDEmCalorimeterHit* hit = (EDEmCalorimeterHit*)(*fHitsCollection)[i];
     • Activate plotting of histograms using the UI command(s)
  2. Create & fill ntuples
     • Define two ntuples representing the tracker chamber hits in each tracker chamber (one in the first arm and one in the second arm)
       • the chamber layer number
       • hit local position (x, y, z)
     • Implement filling of the ntuples in  EDChamberSD::ProcessHits();
       • Note that in there is added a new data member, fNtupleId, in the EDChamberSD class which allows to associate each tracker chamber with one of created ntuples
  3. Inspect generated file in ROOT with the ROOT browser
     • The command to call Root:
       $ root

Exercise 6b:

• Inspect the implementation of a command using G4GenericMessenger in the EDEventAction class, execute the command to inactivate verbose mode and run a new event
• Implement a command to activate or inactivate the randomizing of the particle direction in the primary generator action using G4GenericMessenger in an analogous way as the command in EDEventAction
  • Add a G4GenericMessenger object in EDPrimaryGeneratorAction
  • Call its DeclareProperty method to create setRandomize command associated with already existing data member fRandomize of a G4bool type

Solution: session6_solution.tar.gz