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Last indexation completed on 2025-10-16 09:16:38 UTC

 
  Name Size Date (UTC) Last indexed Description
  Name Size Date (UTC) Last indexed Description
folder Parent directory - 2025-10-17 07:01:03

Geant4 - Composite calorimeter example
README
CompositeCalorimeter is an example of a test-beam simulation used by the CMS Collaboration to validate Geant4 against real data taken (in 1996) in a CMS Hadron calorimeter test-beam. The name "Composite" for this example emphasizes that, although the test-beam had the goal of studying the hadronic calorimeter response, part of the data was taken with the presence of the electromagnetic crystal calorimeter in front of the hadronic calorimeter, to better reproduce the situation as in the real CMS experiment. The geometry of the simulation has been setup in such a way to allow very easily, at run time (therefore without need of changing any code; see below for the details) the inclusion or exclusion of the electromagnetic calorimeter part. Although some important aspects, for a detailed comparison between test-beam data and simulation, like beam profile, noise, and digitization, have been omitted here (to avoid too many technical details), nevertheless, this example is able to reproduce the main features of most of the relevant observables as measured in the real test-beam. The output of this example consists of a set of histograms and one ntuple which are stored on a ROOT file (default). In our opinion, the most original "lesson" which is offered by this advanced example for the Geant4 user is to show how the Geometry and the Sensitive/Hit part of the simulation is treated in a big experiment. Although the details of how this is done vary from experiment to experiment (it is worth, for instance, to compare with the Atlas-based advanced example lAr_calorimeter), the main driving needs and goals are quite general: to have consistency, but avoiding duplications and couplings as much as possibile, between Simulation, Reconstruction, and Visualization. Notice that the solution offered in this example by CMS could appear "overdone" for the sake of simulating only a relatively simple test-beam setup; but it should be kept in mind that the same approach is used also for the full CMS detector simulation, as well as for any subdetector.


SEE ALSO: README

CCalActionInitializer.cc 2447 bytes 2025-10-17 07:01:03 Not valid  
CCalAMaterial.cc 4590 bytes 2025-10-17 07:01:03 Not valid Specialised class to store information to make G4Material
CCalDetector.cc 4283 bytes 2025-10-17 07:01:03 Not valid CCalDetector is a detector factory class
CCalDetectorConstruction.cc 7145 bytes 2025-10-17 07:01:03 Not valid CCalDetectorConstruction user action class to construct
CCalEcal.cc 4354 bytes 2025-10-17 07:01:03 Not valid CCalEcal Geometry factory class for crystal matrix
CCalEcalOrganization.cc 2724 bytes 2025-10-17 07:01:03 Not valid Defines numbering schema for the Electromagnetic Calorimeter
CCalEventAction.cc 9154 bytes 2025-10-17 07:01:03 Not valid CCalEndOfEventAction provides User actions at end of event
CCalG4Able.cc 5477 bytes 2025-10-17 07:01:03 Not valid CCalG4Able is the base class of a Geant4 geometry factory
CCalG4Ecal.cc 10955 bytes 2025-10-17 07:01:03 Not valid CCalG4Ecal Factory class to construct the G4 geometry of the
CCalG4Hall.cc 4142 bytes 2025-10-17 07:01:03 Not valid CCalG4Hall Geometry factory class to construct G4 geometry
CCalG4Hcal.cc 13872 bytes 2025-10-17 07:01:03 Not valid CCalG4Hcal Factory class to construct the G4 geometry of the
CCalG4Hit.cc 3220 bytes 2025-10-17 07:01:03 Not valid G4 Hit class for Calorimeters (Ecal, Hcal, ...)
CCalGeometryConfiguration.cc 4649 bytes 2025-10-17 07:01:03 Not valid Handles geometry configuration to be constructed
CCalHall.cc 3104 bytes 2025-10-17 07:01:03 Not valid CCalHall Geometry factory class for the experimental hall
CCalHcal.cc 6999 bytes 2025-10-17 07:01:03 Not valid CCalHcal Geometry factory class for the hadron calorimeter
CCalHcalOrganization.cc 2425 bytes 2025-10-17 07:01:03 Not valid Defines numbering schema for the Hadron Calorimeter
CCalHit.cc 4512 bytes 2025-10-17 07:01:03 Not valid Hit class for Calorimeters (Ecal, Hcal, ...)
CCalMagneticField.cc 4670 bytes 2025-10-17 07:01:03 Not valid User Field class implementation.
CCalMaterial.cc 5883 bytes 2025-10-17 07:01:03 Not valid CCalMaterial transient class to store information from
CCalMaterialFactory.cc 13803 bytes 2025-10-17 07:01:03 Not valid CCalMaterialFactory is a factory class to vuild G4Material
CCaloOrganization.cc 6019 bytes 2025-10-17 07:01:03 Not valid Packing, unpacking and other related utilities for
CCaloSD.cc 9556 bytes 2025-10-17 07:01:03 Not valid Stores hits of calorimetric type in appropriate container
CCalPrimaryGeneratorAction.cc 14340 bytes 2025-10-17 07:01:03 Not valid CCalPrimaryGeneratorAction Sets up particle beam
CCalPrimaryGeneratorMessenger.cc 8494 bytes 2025-10-17 07:01:03 Not valid CCalPrimaryGeneratorMessenger adds new commands for
CCalRotationMatrixFactory.cc 10540 bytes 2025-10-17 07:01:03 Not valid CCalRotationFactory is a factory class to define all rotation
CCalRunAction.cc 6011 bytes 2025-10-17 07:01:03 Not valid A class for providing user actions at begin and end of run
CCalSDList.cc 3216 bytes 2025-10-17 07:01:03 Not valid Records names of all SD objects
CCalSensAssign.cc 3130 bytes 2025-10-17 07:01:03 Not valid CCalSenAssign creates and assigns the sensitive detetctors
CCalSensitiveConfiguration.cc 4793 bytes 2025-10-17 07:01:03 Not valid CCalSensitiveConfiguration handles the declaration of
CCalSensitiveDetectors.cc 3705 bytes 2025-10-17 07:01:03 Not valid Provides a map of logicalvolume pointers which can be sensitive
CCalStackingAction.cc 6257 bytes 2025-10-17 07:01:03 Not valid Stacking action needed for the application
CCalSteppingAction.cc 5376 bytes 2025-10-17 07:01:03 Not valid Study profiling during the steps
CCalutils.cc 3815 bytes 2025-10-17 07:01:03 Not valid General utilities.
CCalVisualisable.cc 5831 bytes 2025-10-17 07:01:03 Not valid Sets visualisable attributes from .vis files
CCalVOrganization.cc 2745 bytes 2025-10-17 07:01:03 Not valid Base class for definition of sensitive unit numbering schema