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Forum: Processes Involving Optical Photons
Re: Question Track stuck or dielectric_LUT (Geertje)
Date: 01 Apr, 2015
From: Gumplinger Peter <Gumplinger Peter>

Hi Geertje,

> 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),

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

Can you recompile source/geometry/navigation/src/G4Navigator.cc after setting G4DEBUG_NAVIGATION true?

Additionally, set /tracking/verbose 1 and send me the printout around one occurrence of the above G4Exception.

As well set theBoundaryProcess->SetVerboseLevel(1) or /process/optical/verbose 1 if you used G4OpticalPhysics (List).

Peter

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