|Message: Re: Applying q.e. of photon detector at Cerenkov photon production stage?||Not Logged In (login)|
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On Thu, 10 Feb 2011 20:25:41 GMT, Gumplinger Peter wrote:
> You have a very good point - why propagate an optical photon when in the > end a single random number, based on a wavelength dependent q.e., will > decide whether or not this photon contributes to the signal.[...]
> One place you can do this even earlier is by hacking the Geant4 source. > There is a for-loop: > > http://www-geant4.kek.jp/lxr/source/processes/electromagnetic/xrays/src/G4Cerenkov.cc#L240 > > The optical photon energy is sucessfully sampled after this do-while: > > http://www-geant4.kek.jp/lxr/source/processes/electromagnetic/xrays/src/G4Cerenkov.cc#L259 > > You could jump (continue) to the end of the for-loop on the q.e. > condition applied to 'sampledEnergy'.
Hi, Peter. Would it make sense to provide a user hook to define such a q.e. condition (i.e., for event biasing) and test it as part of the code? Or would that introduce unacceptable time costs for the majority of cases where a user doesn't use such a hook?
-- Michael Kelsey
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