EMP BWEC

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Simulation configuration

To set the general behaviour of a simulation, a config file mechanism is used. The singleton class PRIMASimulationConfig is responsible for reading the config file and providing the other classes with the specified config settings.

How to define a new command

Add the variable(s) containing the settings information to class PRIMASimulationConfig, implementing the corresponding “get” method.
Initialise these variables in the constructor using their default values.

Add an if block in the while loop inside method PRIMASimulationConfig::ReadConfFile, e.g.

if(key == "macro-file"){
	macroFileName = value;
	macroSpecified = 1;
	cout<<"macro file name set to: "<<macroFileName<<endl;
      }

Document the new command in this wiki page.

List of commands

Specify the root file where the geometry (TGeoManager object) to be used in the simulation is saved.
```
geometry-file <filename>
```

Specify the geant4 macro file to be executed. If this command is not used the geant4 interactive shell will be loaded.
```
macro-file <geant4 macro file>
```

Specify the root file where the simulation output is written. Attention! The specified file will be overwritten.
```
root-output-file test_bwec.root
```

Specify the primary generator to be used
```
primary-generator <generator>
```
Until now, the following options are available:
- particleGun: uses the geant4 particle gun which can be set in the macro file
- p16uniform: generates electron over the surface of proto16, placed at 1.2 m from the particle source. The electron energy is uniformly distributed between 100 MeV and 1500 MeV