|Message: Re: photoelctrons ???||Not Logged In (login)|
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Usually people don't have a need to simulate photoelectrons coming off the photocathode of a PMT. Most photocathodes and/or the full PMT chain have a 'photo-efficiency' provided by the manufacturer. Sometimes this efficiency is a function of the energy and/or position and/or angle with which the optical photon strikes the cathode.
If you think you must simulate the PMT amplification in detail, you'll have to write the code yourself, both generating photo-electrons coming off the cathode as well as the geometry of the dynodes and associated fields. This is a rather involved project and I don't know of anyone who has actually embarked on this in the context of Geant4. It could be done, G4 allows for E-fields, but there is also nothing in G4 generating the avalanche from the dynodes - and you'll have to write that too.
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