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Question I got inaccurate result when using very small range of geometry 

Forum: Geometry
Date: Nov 15, 07:33
From: fatin hamimi mustafa <fatin hamimi mustafa>

Hi, I hope this is the right place to ask questions because I am using GAMOS and GAMOS is based on GEANT4 platform I am running a simulation of optical photon transport in optical fiber where the diameter of the cladding-core practically should be 125/9 um. Theoretically, the optical photon would only travel in the core region. However, the result seems not promising (picture 1). Then I try to increase the diameter of the cladding-core to be 1250/90um and surprisingly I got exactly as I want (picture 2). I would like to ask the solution for this or perhaps this is the limitation of GEANT4?

   Attachment:
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2018/11/15/07.32-98241-pic1.jpg
      http://hypernews.slac.stanford.edu/HyperNews/geant4/get/AUX/2018/11/15/07.32-36047-pic2.jpg

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