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Re: Question propagation of optical photon (Florian ITARD)
Date: 14 Aug, 2008
From: Gumplinger Peter <Gumplinger Peter>

Hi Florian,

You need to count how many photons are hitting your PMT. If the PMTs have a 'photo efficiency' you need to set this too. The PMT is actually a photo-cathode a 'dielectic_metal' surface. For this surface, you need to specify a REFLECTIVITY and (if you want) an 'EFFICIENCY'.

Please, take a look at and consult the geant4/examples/extended/optical/LXe - specifically how the 'photocath_surf' is defined in LXeMainVolume.cc and how photons are counted in LXeSteppingAction.cc (case Detection)

Hope this helps, Peter

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