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Question Track stuck or dielectric_LUT 

Forum: Processes Involving Optical Photons
Date: 31 Mar, 2015
From: Geertje <Geertje>

Hi all, I'm trying to simulate a samll water cherenkov setup consisting of a steel tank filled with water and wrapped with VM2000 foil - the foil is non physical and only assigned via an optical border surface to the steel tank. When assigning the optical surface G4OpticalSurface("DF2000-Dielectric",unified, polished, dielectric_metal) with a specific wavlength depending reflectivity all works fine. When changing the optical surface to G4OpticalSurface("DF2000-Dielectric",LUT, polishedvm2000air, dielectric_LUT) using the same reflectivity I run into a lot of stuck photon tracks(see below), which don't seem to depend on a specific loaction and don't occur for all optical photons.

*** G4Exception : GeomNav1002
      issued by : G4Navigator::ComputeStep()
Track stuck or not moving. Track stuck, not moving for 10 steps
          in volume -WaterTank_physic-

I checked my geometry, no overlaps can be detected. I'm currently running my simulation in genat4.9.6.p02. Any ideas to what I'm doing wrong? Thanks!

Geertje

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1 Feedback: Re: Track stuck or dielectric_LUT   (Gumplinger Peter - 01 Apr, 2015)
(_ None: Re: Track stuck or dielectric_LUT   (Geertje - 15 Apr, 2015)
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