In the context of a Geant4 simulation, source code files contain the actual C++ code that defines the behavior and structure of your simulation. These files are where you implement the various components of your simulation, such as geometry, physics processes, primary particle generation, and event handling. Here are some common types of source code files in a Geant4 simulation:
1. Main Source Code File (.cc or .cpp):
This file typically contains the main function and is responsible for setting up the Geant4 run manager, initializing the detector geometry, defining the physics processes, and managing the run.
Example file name: YourSimulationName.cc
2. Detector Construction Source Code File:
Defines the geometry of your simulation, including detectors, materials, and their arrangement in space.
Example file name: YourDetectorConstruction.cc
3. Physics List Source Code File:
Define the physics processes that will be used in your simulation, such as electromagnetic interactions, hadronic processes, and particle decay.
Example file name: YourPhysicsList.cc
4. Primary Generator Action Source Code File:
Defines how primary particles are generated and initialized in your simulation.
Example file name: YourPrimaryGeneratorAction.cc
5. Event Action Source Code File:
Defines what should happen at each step of an event, such as storing data or taking specific actions.
Example file name: YourEventAction.cc
6. Run Action Source Code File:
Defines what should happen at the beginning and end of each run, such as initializing run-specific information or collecting run-level statistics.
Example file name: YourRunAction.cc
7. Stepping Action Source Code File:
Defines what should happen at each step of a particle’s trajectory, such as tracking or analyzing data.
Example file name: YourSteppingAction.cc
8. Visualization Source Code File (Optional):
If you want to visualize your simulation results, you might include a file to manage visualization settings and attributes.
Example file name: YourVisualizationManager.cc
These source code files collectively form the backbone of your Geant4 simulation, and each file corresponds to a specific aspect of the simulation’s functionality. Depending on the complexity of your simulation, you may have additional source code files to organize and modularize your code effectively. The structure and naming conventions of these files are essential for maintaining a clear and understandable codebase.
