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Keywords: fresnel refraction, total internal reflection, optical boundary process
Forum: Processes Involving Optical Photons
Date: 27 Nov, 2006
From: Gumplinger Peter <Gumplinger Peter>

Hi Kay,

I assume you are not using 'G4OpticalSurface(s)'(?) So, when all the nesting is done, you end up with some space filled with plastic (bars) and air around it. The G4OpBoundaryProcess needs to know the index of refraction on both sides of an interface. If your bars completely fill their mother (RadiatorBlock) and if the RadiatorBlock volume itself in turn is as large as its mother - the DetectorArm, the G4Navigator will go directly from 'bar' to 'world' and will never encounter RadiatorBlock and DetectorArm. That is because outside the bar assembly is the world and none of the other volumes - they are all not larger than what is already filled with plastic.

I suspect you haven't given world a dielectric material. What is the material of your world volume; is it 'Air' and do you have specified the index of refraction for Air?

Regards, Peter

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1 Feedback: Re: Inconsistency in optical photon tracking?   (Kay Ulbrich - 30 Nov, 2006)
(_ None: Re: Inconsistency in optical photon tracking?   (Peter Gumplinger - 30 Nov, 2006)
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