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icon9.gif  MVD geometry overlaps [message #15017] Wed, 24 July 2013 13:12
StefanoSpataro is currently offline  StefanoSpataro
Messages: 2726
Registered: June 2005
Location: Torino
first-grade participant

From: 2.235.190*
Dear all,
triggered by some forum discussion, I checked the MVD geometry searching for overlaps.
This is what I obtained:

gGeoManager->CheckGeometryFull()
====================================================================
STAGE 1: Overlap checking by sampling within 10 microns
====================================================================
Info in <TGeoNodeMatrix::CheckOverlaps>: Checking overlaps for cave and daughters within 0.001
Info in <TGeoNodeMatrix::CheckOverlaps>: Checking overlaps by sampling <s> for cave and daughters
Info in <TGeoNodeMatrix::CheckOverlaps>: === NOTE: Extrusions NOT checked with sampling option ! ===
Info in <TGeoChecker::CheckOverlapsBySampling>: #Found 4 overlaps adding-up to 19.236 +/- 1.83408 [cm3] for daughters of Mvd-2.1o(Central-Mvd)
Info in <TGeoChecker::CheckOverlapsBySampling>: #Found 1 overlaps adding-up to 176.101 +/- 5.36354 [cm3] for daughters of Mvd-2.1oSupport
Info in <TGeoChecker::CheckOverlapsBySampling>: #Found 1 overlaps adding-up to 10213.2 +/- 34.7226 [cm3] for daughters of Mvd-SupportoGlobalFwd
Info in <TGeoChecker::CheckOverlapsBySampling>: #Found 1 overlaps adding-up to 498.788 +/- 4.18235 [cm3] for daughters of Mvd-2.1oComponents
Info in <TGeoChecker::CheckOverlapsBySampling>: #Found 1 overlaps adding-up to 818.668 +/- 4.80788 [cm3] for daughters of Mvd-ComponentsoConoElectronics
Error in <TGeoChecker::CheckOverlapsBySampling>: No point inside volume!!! - aborting
Error in <TGeoChecker::CheckOverlapsBySampling>: No point inside volume!!! - aborting
Error in <TGeoChecker::CheckOverlapsBySampling>: No point inside volume!!! - aborting
Info in <TGeoChecker::CheckOverlapsBySampling>: #Found 1 overlaps adding-up to 367.446 +/- 3.13564 [cm3] for daughters of Mvd-ComponentsoSmd
Error in <TGeoChecker::CheckOverlapsBySampling>: No point inside volume!!! - aborting
Error in <TGeoChecker::CheckOverlapsBySampling>: No point inside volume!!! - aborting
Info in <TGeoChecker::CheckOverlapsBySampling>: #Found 1 overlaps adding-up to 6.65665 +/- 0.932117 [cm3] for daughters of Mvd-2.1oRouting
Info in <TGeoChecker::CheckOverlapsBySampling>: #Found 1 overlaps adding-up to 0.0399197 +/- 0.0399197 [cm3] for daughters of Mvd-RoutingoBl1
Error in <TGeoChecker::CheckOverlapsBySampling>: No point inside volume!!! - aborting
Error in <TGeoChecker::CheckOverlapsBySampling>: No point inside volume!!! - aborting
Info in <TGeoChecker::CheckOverlapsBySampling>: #Found 1 overlaps adding-up to 0.00015873 +/- 9.16426e-05 [cm3] for daughters of CableoInsulation-Feo3oIIoBundle
Info in <TGeoChecker::CheckOverlapsBySampling>: #Found 3 overlaps adding-up to 9.5286e-05 +/- 4.7643e-05 [cm3] for daughters of CoolingoInsulationo3oIIoBundle
Error in <TGeoChecker::CheckOverlapsBySampling>: No point inside volume!!! - aborting
Info in <TGeoChecker::CheckOverlapsBySampling>: #Found 1 overlaps adding-up to 274.958 +/- 5.70728 [cm3] for daughters of Mvd-RoutingoPfwd
Info in <TGeoChecker::CheckOverlapsBySampling>: #Found 1 overlaps adding-up to 0.110866 +/- 0.110866 [cm3] for daughters of Mvd-RoutingoSfwd
Error in <TGeoChecker::CheckOverlapsBySampling>: No point inside volume!!! - aborting
Check overlaps:      [==========]  111257 [100.00 %]   TIME 22:49:41             
Info in <TGeoNodeMatrix::CheckOverlaps>: Number of illegal overlaps/extrusions : 17

====================================================================
STAGE 2: Global overlap/extrusion checking within 10 microns
====================================================================
Info in <TGeoNodeMatrix::CheckOverlaps>: Checking overlaps for cave and daughters within 0.001
Check overlaps:      [==========]  111257 [100.00 %]   TIME 05:15:14             
Info in <TGeoNodeMatrix::CheckOverlaps>: Number of illegal overlaps/extrusions : 270

====================================================================
STAGE 3: Propagating 1000000 tracks starting from vertex
 and conting number of boundary crossings...
====================================================================
Error in trying to cross boundary of cave_1 98.99 %]   TIME 00:50:20             
Transporting tracks  [==========] 1000000 [100.00 %]   TIME 00:50:50             
Time for crossing 57613394 boundaries: 3.05043e+09 [ms]
Time per track for full geometry traversal: 3050.43 [ms], per crossing: 52.9465 [ms]
====================================================================


I supposed the MVD default geometry (Mvd-2.1_FullVersion.root) should be overlap-free, but this is not the case.
Are these overlaps understood and negligible, or maybe there is some better geometry to use?

[Updated on: Wed, 24 July 2013 19:29]

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