|Message: Re: Tracking only one or a few photons?||Not Logged In (login)|
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Dear J.E. Suh,
> Is there any solution that I can see only one or a few photons?
Every secondary generated in the simulation, this includes Cerenkov photons, is first put on a temporary 'stack' before it is actually pushed on the real stack to be propagated. A user-hook G4UserStackingAction:::ClassifyNewTrack is called before the track goes on the real stack. In that method, you can decide to keep or forget about the secondary. Please, see:
In that method, you can code:
if (G4UniformRand() < keep) return fUrgent; else return fKill;
where 'keep' is the fraction of photons you actually want to see.
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