Deduplicate MFT capacitor/welding and X7R0402 geometry - #15723
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August 26, 2026 08:40
Deduplicate geometrically identical MFT capacitor/welding TGeoVolumes and the X7R0402 assembly, reducing the ALICE geometry by ~15k logical volumes. * Geant4 initialization: 26.3s → 17.0s (~35% faster). * Logical volume UIDs: 27,491 → 6,919, while preserving 5,465,235 nodes. * Verified that the deduplicated volumes are never accessed by name, so no alignment or hit-scoring dependencies are affected. * Verified that generated hits are bit-by-bit identical before and after the change. * Adds dimension-consistency guards to the static geometry cache. * Makes geometry transformations to Geant4/VecGeom/CAD substantially more tractable by drastically simplifying the geometry volume graph. A major simplification of the ALICE geometry with significant benefits for downstream geometry transformation and processing workflows.
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Deduplicate MFT capacitor/welding and X7R0402 geometry
Deduplicate geometrically identical MFT capacitor/welding TGeoVolumes and
the X7R0402 assembly, reducing the ALICE geometry by ~15k logical volumes.
alignment or hit-scoring dependencies are affected.
the change.
tractable by drastically simplifying the geometry volume graph.
A major simplification of the ALICE geometry with significant benefits for
downstream geometry transformation and processing workflows.