Introduction to GEANT4

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== Introduction ==
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== <span style="color:#000080"> Introduction </span> ==
GEANT4 is a software toolkit based on C++. In your code you have to define:  
GEANT4 is a software toolkit based on C++. In your code you have to define:  
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* <span style="color:#ff0000"> G4RunManager </span>: Manages the simulation process
* <span style="color:#ff0000"> G4RunManager </span>: Manages the simulation process
    
    
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== The function main() ==
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== <span style="color:#000080"> The function main() </span> ==
The function <span style="color:#ff0000"> main() </span> defines the skeleton of your simulation code. Inside the function you instantiate <span style="color:#ff0000"> G4RunManager </span> and notify it of your mandatory and optional classes. Example <span style="color:#ff0000"> main() </span> function:
The function <span style="color:#ff0000"> main() </span> defines the skeleton of your simulation code. Inside the function you instantiate <span style="color:#ff0000"> G4RunManager </span> and notify it of your mandatory and optional classes. Example <span style="color:#ff0000"> main() </span> function:
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<span style="color:#800000"> } </span>
<span style="color:#800000"> } </span>
   
   
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== Experimental setup ==
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== <span style="color:#000080"> Experimental setup </span> ==
You can define your experiment by using three base classes:
You can define your experiment by using three base classes:
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<span style="color:#800000"> H2O->AddElement(O, natoms=1); </span>  
<span style="color:#800000"> H2O->AddElement(O, natoms=1); </span>  
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== Physics processes ==  
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== <span style="color:#000080"> Physics processes </span> ==  
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== Generate primary particles ==  
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== <span style="color:#000080"> Generate primary particles </span> ==  
<span style="color:#ff0000"> G4VUserPrimaryGeneratorAction </span> is a mandatory user action class to control the generation of primary particles.  
<span style="color:#ff0000"> G4VUserPrimaryGeneratorAction </span> is a mandatory user action class to control the generation of primary particles.  
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* <span style="color:#ff0000"> G4GeneralParticleSource </span> the primary vertex is randomly chosen on surface of a given volume with pre-defined energy spectra.  
* <span style="color:#ff0000"> G4GeneralParticleSource </span> the primary vertex is randomly chosen on surface of a given volume with pre-defined energy spectra.  
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== Optional user classes ==
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== <span style="color:#000080"> Optional user classes </span> ==

Revision as of 07:53, 7 July 2014

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