| Summary: | Stuck track on a border of the polycone in CMS simulation | ||
|---|---|---|---|
| Product: | Geant4 | Reporter: | Vladimir.Ivantchenko |
| Component: | geometry | Assignee: | Gabriele Cosmo <Gabriele.Cosmo> |
| Status: | RESOLVED MOVED | ||
| Severity: | critical | ||
| Priority: | P4 | ||
| Version: | 10.5 | ||
| Hardware: | All | ||
| OS: | All | ||
| URL: | https://sft.its.cern.ch/jira/browse/VECGEOM-537 | ||
We are using VecGeom version 1.1.2 Vladimir As the problem does not affect vanilla Geant4 solids, please, transfer this ticket to the VecGeom JIRA system: https://sft.its.cern.ch/jira/projects/VECGEOM VECGEOM-537 JIRA ticket is created. This problem will be closed. |
Dear geometry experts, in CMS simulation with Physics List FTFP_BERT_EMY we have regular problem, which stops tracking and enable abort of CMS run. This problem is not seen with our default Physics List. This happens since Geant4 10.5 but a particular event happens with Geant4 10.5ref07: e+ with energy about 7 MeV stack on a border of the main envelop of the CMS geometry. 54 -35.31 -53.11 658.5 0.007189 0.000769 0.634 231 CMSE msc 55 -37.16 -56.38 671.3 0.007163 0.0261 135 245 CMSE msc 56 -37.68 -57.75 674.1 0.007159 0.00403 31.9 248 CMSE Transportation %MSG-w SimG4CoreApplication: OscarMTProducer:g4SimHits 26-Aug-2019 17:00:17 CEST Run: 1 Event: 19 SimG4Exception caght! -------- EEEE ------- G4Exception-START -------- EEEE ------- *** G4Exception : GeomNav0003 issued by : G4Navigator::ComputeStep() Stuck Track: potential geometry or navigation problem. Track stuck, not moving for 25 steps. Current phys volume: 'CMSE' - at position : (-413.6315273152043,-445.665372234611,6570.049669070449) in direction: (0.260944788544001,-0.5260912944434142,-0.8094045757484816) (local position: (-413.6315273152043,-445.665372234611,6570.049669070449)) (local direction: (0.260944788544001,-0.5260912944434142,-0.8094045757484816)). Previous phys volume: 'CMSE' Likely geometry overlap - else navigation problem ! Track *abandoned* due to excessive number of Zero steps. Event aborted. -------- EEEE -------- G4Exception-END --------- EEEE ------- cms2018 geometry is used. No overlap in OCMS( world) and CMSE (main envelop) are detected. Vladimir