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[ALICE3] TRK: Collect services in a dedicated volume assembly #15215

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[ALICE3] TRK: Collect services in a dedicated volume assembly #15215

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3d95d30
Refactor TRKServices to use volume assembly
njacazio Mar 25, 2026
cbd8a19
Add service volume name to GeometryTGeo
njacazio Mar 25, 2026
c513064
Add getTRKServiceVolPattern method and variable
njacazio Mar 25, 2026
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2 changes: 2 additions & 0 deletions Detectors/Upgrades/ALICE3/TRK/base/include/TRKBase/GeometryTGeo.h
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Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,7 @@ class GeometryTGeo : public o2::detectors::DetMatrixCache
return sInstance.get();
};
static const char* getTRKVolPattern() { return sVolumeName.c_str(); }
static const char* getTRKServiceVolPattern() { return sServiceVolName.c_str(); }
static const char* getTRKLayerPattern() { return sLayerName.c_str(); }
static const char* getTRKPetalAssemblyPattern() { return sPetalAssemblyName.c_str(); }
static const char* getTRKPetalPattern() { return sPetalName.c_str(); }
Expand Down Expand Up @@ -198,6 +199,7 @@ class GeometryTGeo : public o2::detectors::DetMatrixCache
static constexpr int MAXLAYERS = 20; ///< max number of active layers

static std::string sVolumeName;
static std::string sServiceVolName;
static std::string sLayerName;
static std::string sPetalAssemblyName;
static std::string sPetalName;
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1 change: 1 addition & 0 deletions Detectors/Upgrades/ALICE3/TRK/base/src/GeometryTGeo.cxx
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Expand Up @@ -26,6 +26,7 @@ std::unique_ptr<o2::trk::GeometryTGeo> GeometryTGeo::sInstance;

// Names
std::string GeometryTGeo::sVolumeName = "TRKV";
std::string GeometryTGeo::sServiceVolName = "TRKService";
std::string GeometryTGeo::sLayerName = "TRKLayer";
std::string GeometryTGeo::sPetalAssemblyName = "PETAL";
std::string GeometryTGeo::sPetalName = "PETALCASE";
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13 changes: 8 additions & 5 deletions Detectors/Upgrades/ALICE3/TRK/simulation/src/TRKServices.cxx
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Expand Up @@ -127,18 +127,21 @@ void TRKServices::createMaterials()

void TRKServices::createServices(TGeoVolume* motherVolume)
{

TGeoVolumeAssembly* vol = new TGeoVolumeAssembly(GeometryTGeo::getTRKServiceVolPattern());
motherVolume->AddNode(vol, 2, new TGeoTranslation(0, 0., 0));
createMaterials();
createVacuumCompositeShape();
auto& trkPars = TRKBaseParam::Instance();
if (trkPars.getLayoutSRV() == kLOISymm) {
LOGP(info, "TRK services: LoI version");
createMiddleServices(motherVolume);
createOuterDisksServices(motherVolume);
createOuterBarrelServices(motherVolume);
createMiddleServices(vol);
createOuterDisksServices(vol);
createOuterBarrelServices(vol);
} else {
LOGP(info, "TRK services: Peacock layout");
createMLServicesPeacock(motherVolume);
createOTServicesPeacock(motherVolume);
createMLServicesPeacock(vol);
createOTServicesPeacock(vol);
}
}

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