|Message: Re: Generate photons discretionally||Not Logged In (login)|
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> Is it possible to generate photons discretionally?
What exaclty would you like to do? Yes, it is possible to launch photons one by one. Please, see the code and macro in OpNovice:
This uses the G4ParticleGun with the utility:
that makes sure the op-photon polarization is perpendicular to the direction.
> Like ZEMAX?
I am not familier with ZEMAX - but let me know if there is anything in that program that G4 can't do.
> Give an energy, direction, etc...by myself.
Yes, via G4ParticleGun
> I want to simulate Cherenkov radiation.
Well, Geant4 already has a process - G4Cerenkov - that generates cherenkov photons when a charged particle passes through a medium - so long as that medium has been given a real index of refraction. Please, see the G4 documentation.
> I wanna know if I can generate photons themselves without primary particle beam.
Yes, but in the case of cherekov photons I don't see why you would want to.