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Idea Re: Counting all ionization electrons in an event 

Forum: Electromagnetic Processes
Re: Question Counting all ionization electrons in an event (Clarisse)
Date: Oct 29, 13:21
From: Vladimir Ivanchenko <Vladimir Ivanchenko>

Hello,

The method described in your post cannot produce what you want, because G4 does not produce all secondary electrons. Depending on cut value Geant4 samples production of secondary electrons above some threshold in kinetic energy (its value is printed at initialisation time). All energy transfer below this threshold are taken into account in form of energy deposite along the step of a charged particle. This energy deposition should be converted inside User code into number of initial electron/ion pairs which will be registered by the detector. Of course, the conversion factor is a function of the media. The processes of drift, avelange... of these electrons/ions are not simulated inside ordinary Geant4 tracking. This part should be implemented in the user code. We are providing only a little help for that with the class G4ElectronIonPair which can be used in UserSteppingAction or SensitiveDetector.

VI

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