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Forum: Processes Involving Optical Photons
Re: None The correct definition of boundary surfaces (Volodymyr Rodin)
Date: Feb 01, 10:38
From: Daren Sawkey <Daren Sawkey>


Apologies for the delayed response.

> What is the right way of defining LogicalSurfaces if I expecting photons
> coming in both ways?

I don't know if it changes anything. If it doesn't work as expected, please let us know.

> Do I need define RINDEX here or Geant4 will get it from volumes in Log.
> Border Surface?

The surface RINDEX is only for backpainted surfaces.

> Is it correct or definition of the surface should be different for each
> side?

It depends on what you want. According to the Book for Application Developers: The border surface is an ordered pair of physical volumes, so in principle, the user can choose different optical properties for photons arriving from the reverse side of the same interface.

-- Daren.

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