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Keywords: hits in multiply placed volume
Forum: Hits, Digitization and Pileup
Re: Question Loops in A01EventAction (hits in multiply placed volume?) (Kazuyoshi Furutaka)
Re: None Re: Loops in A01EventAction (hits in multiply placed volume?) (Makoto Asai)
Date: 07 Mar, 2005
From: Kazuyoshi Furutaka <Kazuyoshi Furutaka>

Dear Asai-san,

Thanks for your follow-up.

Well, then
  an object of G4VSensitiveDetector can have (one or more) "logical"
  (not physical) volumes associated to it, and

  replicated volumes created from the same logical volume share a
  single G4VSensitiveDetector object (and hits are stored in a single
  collection),

  so to distinguish between the replicated volumes one must check
  the copy number or replica number of the physical volume.
Am I correct?

What's the difference between a copy number and a replica number?
I've tried in my test code to see the difference, but both
G4VTouchable::GetReplicaNumber() and G4VTouchable::GetCopyNumber()
gave the same numbers.


By the way, the latter half (outside of the '#ifdef G4ANALYSIS_USE'
clause) of the method also contains the outer loop over layers/cells,
but these are for grouping of the hits into layers, right?

Many thanks in advance,
Kazuyoshi

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