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Forum: Processes Involving Optical Photons
Re: None photoelctrons ??? (Davinder Siwal)
Date: 18 Jan, 2011
From: Gumplinger Peter <Gumplinger Peter>

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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1 None: Re: photoelctrons ???   (Davinder Siwal - 18 Jan, 2011)
(_ Feedback: Re: photoelctrons ???   (Gumplinger Peter - 19 Jan, 2011)
(_ None: Re: photoelctrons ???   (Davinder Siwal - 19 Jan, 2011)
(_ Feedback: Re: photoelctrons ???   (Gumplinger Peter - 20 Jan, 2011)
(_ None: Re: photoelctrons ???   (Davinder Siwal - 20 Jan, 2011)
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