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Forum: Geometry
Re: Question How to eliminate the effect caused by the boundary of two connected solids (liyong)
Re: Question Re: How to eliminate the effect caused by the boundary of two connected solids (liyong)
Re: None Re: How to eliminate the effect caused by the boundary of two connected solids (michel maire)
Re: None Re: How to eliminate the effect caused by the boundary of two connected solids (liyong)
Date: 18 Sep, 2016
From: michel maire <michel maire>

On Thu, 08 Sep 2016 10:59:45 GMT, liyong wrote:
> Dear Dr. Maire,
> 
> Thank you very much for your comment and I am sorry that I didn't reply
> your answer in time.
> 
> You are right that there is no difference of the energy deposition
> profile of elelctron in the two different solid geometries, but the
> neutron flux, generated by primary protons,is not the same. I add the
> detail description in the attachment file. Please find it and have a
> look.
>

 Sorry for the delay; I was off these days.
 I have not yet tried to reproduce your results. I did another test.
 From your plots, it seems that the number of neutrons created is smaller in the layered geometry than in a single volume.
 To check this point, I used a 'hadronic' version of TestEm11, not yet public. I have plot the z position of neutrons when they are created, e.g. their z-vertex.
 I attach the macros and the plot of comparison. As you can see, the spatial distribution of  vertices are similar in the 2 geometries, and therefore the total number of neutrons created too ( ~ 46700 entrees)

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2016/09/18/03.30-58136-liyong1.mac.txt
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2016/09/18/03.30-71015-liyong4.mac.txt
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2016/09/18/03.30-51896-z-vertex.gif

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