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Question Potential overlapping causing unexpected results 

Forum: Geometry
Date: 14 May, 2015
From: Vince P. <Vince P.>

Hi,

I am implementing a liquid argon calorimeter using GEANT4. Included are attachments of screenshots of my geometry. The calorimeter is the small portion to the left of the purple cylinder in attachments g4-ss1 and g4-ss3.

Basically I have a mother volume in which I add two daughters, a solid cylinder of radius 40mm (c1, purple) and another hollow cylinder constructed using Pcons (c2, grey) with two radii, rmin=50mm and rmax=370mm. c1 passes through c2 as shown in attachments g4-ss1 and g4ss3. Now, c2 has the portion of the volume removed where c1 is inserted using a subtraction, as shown in attachments g4-ss2 and g4-ss4.

This configuration results in weird energy deposits inside the calorimeter. Could this be due to an overlap between c1 and c2? When I remove c2 completely, I still get the same unexpected results, which makes me think the geometry is implemented fine. This has been causing me some grief for a while and so wanted an expert's opinion/advice.

Thanks in advance,

Vince.

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2015/05/14/10.42-19079-g4-ss1.png
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2015/05/14/10.42-38003-g4-ss3.png
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2015/05/14/10.42-42450-g4-ss2.png
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2015/05/14/10.42-59318-g4-ss4.png

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1 More: Re: Potential overlapping causing unexpected results   (Gabriele Cosmo - 25 Jun, 2015)
(_ None: Re: Potential overlapping causing unexpected results   (Vince Pascuzzi - 25 Jun, 2015)
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