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Forum: Geometry
Re: Question Surface for the hole (Davit Mayilyan)
Date: 15 Feb, 2012
From: Gumplinger Peter <Gumplinger Peter>

> I am cutting one volume using another one, which is a daughter volume of
> the first one. I want to have a rough surface on the inner side of the
> hole. So I tried using skin surface, but I'm not sure if it is working
> correctly.

No, skin surface is not the correct choice here.

> My question is: How can I have a rough surface on the inner side of the
> hole?

I would use a G4LogicalBorderSurface between the daughter (cut-out) volume and the mother volume (I resume it is a slab/sheet). Since the only place where the two volumes actually 'touch' is the inside of the hole, you get the surface you want exactly where you want it. The skin surface either on the daughter or the mother doesn't work because, in the first case, the daughter also has an interface with the mother-of-the-mother volume, where you wouldn't want it, and in the second case, the rough surface will also be everywhere on the surface of the mother-volume and not just in the inside of the hole.

> I tried to simulate rough surface in the hole giving to the cutting volume a

> surface G4LogicalSkinSurface.

See above, why.

Hope this helps, and if not, please move the thread to the (specific) optical photon forum.

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1 Ok: Re: Surface for the hole   (Davit Mayilyan - 23 Feb, 2012)
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