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Forum: Geometry
Re: Question Need clarification of User Guide re. Gg4VReplica's mother volume (Jacques Goldberg)
Date: 10 Sep, 2014
From: Gabriele Cosmo <Gabriele Cosmo>

Hi Jacques,

as also stated in the documentation in that same chapter:
"The world volume cannot act as a replica, therefore it cannot be sliced."
You need to explicitly create a mother volume for your replicas, which
you eventually place inside the world or inside any other volume.

Cheers, Gabriele

-------------------
On Mon, 11 Aug 2014 19:31:00 GMT, Jacques Goldberg wrote:
> Using Geant4-9.6
> 
> Chapter 4 Section 4.1.4.2 says: "G4PVReplica represents nReplicas
> volumes differing only in their positioning, and completely filling the
> containing mother volume. Consequently if a G4PVReplica is 'positioned'
> inside a given mother it MUST be the mother's only daughter volume."
> 
> Before embarking on an architecture based on this feature (for a
> "multidecker" Lead/Detector sandwich) I would like to understand the
> meaning of the condition "if a G4VReplica is positioned".
> 
> Namely, is the World volume automatically such a mother volume, limiting
> the feature to one instance, or does it just mean that I have to set
> pMotherLogical to 0 in the two instances of G4VReplica which I wish to
> create, one for the identical lead sheets, one for the identical
> detectors ?
> 
> Or is this a valid solution: create an intermediary volume containing
> one Lead sheet and one Detector, and use G4PVReplica to duplicate the
> auxiliary inside its parent?
> 
> Thanks in advance
> 
> Jacques
> 

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