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Question general questions regarding G4LogicalBorderSurface 

Keywords: optical G4LogicalBorderSurface volume G4LogicalSkinSurface
Forum: Documentation and Examples
Date: 11 Jul, 2006
From: Aaron <Aaron>

I am new to GEANT4 and trying to learn about optical modeling.  I have
a couple of questions regarding the G4LogicalBorderSurface class.  I
apologize if the answers are obvious:

1) I am trying to simulate a scintillator box with 4 sides surrounded
   by one medium and the remaining two sides surrounded by a different
   one.  Is G4LogicalBorderSurface the right class to use (as opposed
   to G4LogicalSkinSurface or some other class)?  Using this class, is
   it possible to take into account the different media on each side
   of the box by specifying the two volumes on either side of each
   surface?  I have heard people say that GEANT4 can currently only
   handle the same optical properties on all sides of a volume.  Does
   this refer to G4LogicalSkinSurface and not G4LogicalBorderSurface?

2) Is there an order to the two volumes that the constructor takes?
   I do not understand why there should be, but some of the
   documentation that I read makes me think that there is.  If so,
   can someone please explain why an order is needed?  In other words,
   are the following lines equivalent or different:

      G4LogicalBorderSurface *surf=
        new G4LogicalBorderSurface("surf",volume1,volume2,opSurf);

      G4LogicalBorderSurface *surf=
        new G4LogicalBorderSurface("surf",volume2,volume1,opSurf);

Thank you,


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1 Feedback: Re: general questions regarding G4LogicalBorderSurface   (Peter Gumplinger - 02 Aug, 2006)
1 None: Re: general questions regarding G4LogicalBorderSurface   (Aaron - 03 Aug, 2006)
3 Question: Re: general questions regarding G4LogicalBorderSurface   (Onno Kortmann - 20 Dec, 2006)
1 Feedback: Re: general questions regarding G4LogicalBorderSurface   (John Apostolakis - 10 Jan, 2007)
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