Message: Scintillation photons leaking through refelctive surface Not Logged In (login)
 Next-in-Thread Next-in-Thread
 Next-in-Forum Next-in-Forum

None Scintillation photons leaking through refelctive surface 

Forum: Processes Involving Optical Photons
Date: 30 Apr, 2014
From: Geertje <Geertje>

Dear all, I'm simulating a plastic scintillator which is wrapped with a reflective foil on three sides, the unwrapped forth side is directly coupled to the PMT. For testing reasons I set the refl_foil = 0, so that all photons should be absorbed at the foil boundary. If a start an electron within the scinillator everything is working as supposed to: scintillation light is produced, photons get absorbed on the foil or detected by the PMT. BUT: If I start the electron outside the the setup I find that half of the produced scintillation photons leak through the plastic/foil boundary ( and it looks like at the point where the primary particle enters the setup). I attached my scintillator detector construction with all necessary optical propterties but I can't see where I'm going wrong. From my understanding the two things happening could be 1) scintillation light is produced in the foil, but that shouldn't be possible as I haven't defined any scinillation properties for this material 2) the border surfaces are not correctly recognized by the step but I don't see a reason why. The physics list I'm using is the shielidngList where I added G4OpticalPhysics manually.

Any idea/help would be very much appreciated! Thanks Geertje

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2014/04/30/10.19-78780-scintillator.cc

Inline Depth:
 1 1
 All All
Outline Depth:
 1 1
 2 2
 All All
Add message: (add)

1 Feedback: Re: Scintillation photons leaking through refelctive surface   (Gumplinger Peter - 30 Apr, 2014)
(_ Feedback: Re: Scintillation photons leaking through refelctive surface   (Geertje - 30 Apr, 2014)
(_ Feedback: Re: Scintillation photons leaking through refelctive surface   (Gumplinger Peter - 30 Apr, 2014)
(_ Ok: Re: Scintillation photons leaking through refelctive surface   (Geertje - 01 May, 2014)
(_ Feedback: Re: Scintillation photons leaking through refelctive surface   (Gumplinger Peter - 01 May, 2014)
(_ Question: Re: Scintillation photons leaking through refelctive surface   (Geertje - 01 May, 2014)
 Add Message Add Message
to: "Scintillation photons leaking through refelctive surface"

 Subscribe Subscribe

This site runs SLAC HyperNews version 1.11-slac-98, derived from the original HyperNews