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Reduce the TRD geometry from 17678 to 1002 logical volumes #64

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Reduce the TRD geometry from 17678 to 1002 logical volumes #64

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dffe687
Share one volume for the MCM cooling pipe stubs in the TRD
sawenzel Sep 1, 2026
e7b3801
Build the TRD cooling pipes and power lines once per layer
sawenzel Sep 1, 2026
4804f0c
Write out the TRD chamber dimensions instead of resolving them at run…
sawenzel Sep 1, 2026
40c1df9
Resolve the TRD hit volume lookup to integers at initialisation
sawenzel Sep 1, 2026
190f3a7
Build twelve TRD chamber shapes instead of thirty
sawenzel Sep 1, 2026
04775e8
Give the front-of-supermodule TRD gas pipes their own names
sawenzel Sep 1, 2026
f21f9f0
Place the steel tube, not its gas core, on the -x side of the sector-…
sawenzel Sep 1, 2026
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5 changes: 5 additions & 0 deletions Detectors/TRD/base/include/TRDBase/Geometry.h
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Original file line number Diff line number Diff line change
Expand Up @@ -49,6 +49,11 @@ class Geometry : public GeometryBase, public o2::detectors::DetMatrixCacheIndire
void fillMatrixCache(int mask) override;

private:
/// Index of the chamber shape a (layer, stack) uses, 0..11. The chamber length is the
/// same for every stack except the middle one, so the thirty chambers of a supermodule
/// are built from twelve distinct sets of volumes.
static int shapeClass(int layer, int stack) { return layer + constants::NLAYER * (stack == 2 ? 1 : 0); }

void createVolumes(std::vector<int> const& idtmed);
void assembleChamber(int ilayer, int istack);
void createFrame(std::vector<int> const& idtmed);
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