| Summary: | Geometry/Navigator precision problem | ||
|---|---|---|---|
| Product: | Geant4 | Reporter: | flei |
| Component: | geometry/navigation | Assignee: | Gabriele Cosmo <Gabriele.Cosmo> |
| Status: | RESOLVED WORKSFORME | ||
| Severity: | normal | ||
| Priority: | P5 | ||
| Version: | 8.3 | ||
| Hardware: | All | ||
| OS: | All | ||
Can you please provide a -simple- setup which reproduces the problem, so that we can verify ? Thanks. I have not been able to reproduce the problem by implementing myself a simplified setup based on the described geometry topology. Unless a setup reproducing the problem is provided for further analysis, this report is closed at this point in time. |
Firing geantinos at a geometry consists of layers of very thick (kms)slabs, the G4navigator seems to have a problem in determining the boundary between the layers. This is demonstrated with the print out of two events: in the first one the geantino is correctly transported through the geometry, while in the second event the navigator seems to have detected a narrow gap between layer-23 and layer-22, which shouldn't be there. Fan ********************************************************************************************************* * G4Track Information: Particle = geantino, Track ID = 1, Parent ID = 0 ********************************************************************************************************* Step# X(mm) Y(mm) Z(mm) KinE(MeV) dE(MeV) StepLeng TrackLeng NextVolume ProcName 0 0 0 2.5e+08 2.6e+03 0 0 0 World initStep 1 -5.76e+08 -1.13e+08 2.5e+07 2.6e+03 0 6.28e+08 6.28e+08 Layer-23 Transportation 2 -6.18e+08 -1.21e+08 8.38e+06 2.6e+03 0 4.64e+07 6.75e+08 Layer-22 Transportation 3 -6.37e+08 -1.25e+08 8.99e+05 2.6e+03 0 2.09e+07 6.96e+08 Layer-21 Transportation 4 -6.49e+08 -1.27e+08 -3.48e+06 2.6e+03 0 1.22e+07 7.08e+08 Layer-20 Transportation 5 -6.57e+08 -1.29e+08 -6.59e+06 2.6e+03 0 8.68e+06 7.17e+08 Layer-19 Transportation 6 -6.63e+08 -1.3e+08 -9e+06 2.6e+03 0 6.73e+06 7.23e+08 Layer-18 Transportation 7 -6.68e+08 -1.31e+08 -1.1e+07 2.6e+03 0 5.5e+06 7.29e+08 Layer-17 Transportation 8 -6.72e+08 -1.32e+08 -1.26e+07 2.6e+03 0 4.65e+06 7.34e+08 Layer-16 Transportation 9 -6.76e+08 -1.33e+08 -1.41e+07 2.6e+03 0 4.03e+06 7.38e+08 Layer-15 Transportation 10 -6.79e+08 -1.33e+08 -1.53e+07 2.6e+03 0 3.55e+06 7.41e+08 Layer-14 Transportation 11 -6.82e+08 -1.34e+08 -1.65e+07 2.6e+03 0 3.18e+06 7.44e+08 Layer-13 Transportation 12 -6.85e+08 -1.35e+08 -1.75e+07 2.6e+03 0 2.88e+06 7.47e+08 Layer-12 Transportation 13 -6.87e+08 -1.35e+08 -1.85e+07 2.6e+03 0 2.62e+06 7.5e+08 Layer-11 Transportation 14 -6.89e+08 -1.35e+08 -1.93e+07 2.6e+03 0 2.41e+06 7.52e+08 Layer-10 Transportation 15 -6.91e+08 -1.36e+08 -2.01e+07 2.6e+03 0 2.24e+06 7.54e+08 Layer-9 Transportation 16 -6.93e+08 -1.36e+08 -2.09e+07 2.6e+03 0 2.08e+06 7.57e+08 Layer-8 Transportation 17 -6.95e+08 -1.37e+08 -2.16e+07 2.6e+03 0 1.95e+06 7.58e+08 Layer-7 Transportation 18 -6.97e+08 -1.37e+08 -2.22e+07 2.6e+03 0 1.83e+06 7.6e+08 Layer-6 Transportation 19 -6.98e+08 -1.37e+08 -2.28e+07 2.6e+03 0 1.72e+06 7.62e+08 Layer-5 Transportation 20 -7e+08 -1.37e+08 -2.34e+07 2.6e+03 0 1.63e+06 7.64e+08 Layer-4 Transportation 21 -7.01e+08 -1.38e+08 -2.4e+07 2.6e+03 0 1.55e+06 7.65e+08 Layer-3 Transportation 22 -7.02e+08 -1.38e+08 -2.45e+07 2.6e+03 0 1.47e+06 7.67e+08 Layer-2 Transportation 23 -7.04e+08 -1.38e+08 -2.5e+07 2.6e+03 0 1.4e+06 7.68e+08 Layer-1 Transportation 24 -7.04e+08 -1.38e+08 -2.5e+07 2.6e+03 0 8.1e+03 7.68e+08 World Transportation 25 -7.04e+08 -1.38e+08 -2.53e+07 2.6e+03 0 6.98e+05 7.69e+08 OutOfWorld Transportation ********************************************************************************************************* * G4Track Information: Particle = geantino, Track ID = 1, Parent ID = 0 ********************************************************************************************************* Step# X(mm) Y(mm) Z(mm) KinE(MeV) dE(MeV) StepLeng TrackLeng NextVolume ProcName 0 0 0 2.5e+08 361 0 0 0 World initStep 1 -7.38e+07 2.66e+08 2.5e+07 361 0 3.56e+08 3.56e+08 Layer-23 Transportation 2 -7.92e+07 2.86e+08 8.38e+06 361 0 2.63e+07 3.82e+08 World Transportation 3 -7.92e+07 2.86e+08 8.38e+06 361 0 1.47e-09 3.82e+08 Layer-22 Transportation 4 -8.17e+07 2.94e+08 8.99e+05 361 0 1.18e+07 3.94e+08 Layer-21 Transportation 5 -8.31e+07 3e+08 -3.48e+06 361 0 6.93e+06 4.01e+08 Layer-20 Transportation 6 -8.41e+07 3.03e+08 -6.59e+06 361 0 4.92e+06 4.06e+08 Layer-19 Transportation 7 -8.49e+07 3.06e+08 -9e+06 361 0 3.81e+06 4.1e+08 Layer-18 Transportation 8 -8.55e+07 3.08e+08 -1.1e+07 361 0 3.12e+06 4.13e+08 Layer-17 Transportation