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A3: Add sensitive RICH layers to geometry #14450

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Merged
njacazio merged 1 commit into from
Jun 26, 2025
Merged

A3: Add sensitive RICH layers to geometry #14450

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2 changes: 1 addition & 1 deletion Detectors/Upgrades/ALICE3/RICH/base/src/GeometryTGeo.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@ std::unique_ptr<o2::rich::GeometryTGeo> GeometryTGeo::sInstance;
std::string GeometryTGeo::sVolumeName = "RICHV";
std::string GeometryTGeo::sRingName = "RICHRing";
std::string GeometryTGeo::sChipName = "RICHChip";
std::string GeometryTGeo::sSensorName = "RICHSensor";
std::string GeometryTGeo::sSensorName = "RICHPhotoTile";
std::string GeometryTGeo::sSensorFWDName = "FWDRICHSensor"; // only one big sensor for now
std::string GeometryTGeo::sSensorBWDName = "BWDRICHSensor"; // only one big sensor for now

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2 changes: 2 additions & 0 deletions Detectors/Upgrades/ALICE3/RICH/simulation/include/RICHSimulation/RICHRing.h
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Expand Up @@ -54,6 +54,8 @@ class Ring

auto getDeltaPhiPos() const { return TMath::TwoPi() / mNTiles; }
void createRing(TGeoVolume* motherVolume);
int getPosId() const { return mPosId; }
int getNTiles() const { return mNTiles; }

private:
int mPosId; // id of the ring
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57 changes: 32 additions & 25 deletions Detectors/Upgrades/ALICE3/RICH/simulation/src/Detector.cxx
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Expand Up @@ -145,29 +145,29 @@ void Detector::createGeometry()
vRICH->SetTitle(vstrng);
auto& richPars = RICHBaseParam::Instance();

prepareLayout();
prepareLayout(); // Preparing the positions of the rings and tiles

for (int iRing{0}; iRing < richPars.nRings; ++iRing) {
if (!richPars.oddGeom && iRing == (richPars.nRings / 2)) {
continue;
}
mRings[iRing] = Ring{iRing,
richPars.nTiles,
richPars.rMin,
richPars.rMax,
richPars.radiatorThickness,
(float)mVTile1[iRing],
(float)mVTile2[iRing],
(float)mLAerogelZ[iRing],
richPars.detectorThickness,
(float)mVMirror1[iRing],
(float)mVMirror2[iRing],
richPars.zBaseSize,
(float)mR0Radiator[iRing],
(float)mR0PhotoDet[iRing],
(float)mTRplusG[iRing],
(float)mThetaBi[iRing],
GeometryTGeo::getRICHVolPattern()};
mRings[iRing] = o2::rich::Ring{iRing,
richPars.nTiles,
richPars.rMin,
richPars.rMax,
richPars.radiatorThickness,
(float)mVTile1[iRing],
(float)mVTile2[iRing],
(float)mLAerogelZ[iRing],
richPars.detectorThickness,
(float)mVMirror1[iRing],
(float)mVMirror2[iRing],
richPars.zBaseSize,
(float)mR0Radiator[iRing],
(float)mR0PhotoDet[iRing],
(float)mTRplusG[iRing],
(float)mThetaBi[iRing],
GeometryTGeo::getRICHVolPattern()};
}

if (richPars.enableFWDRich) {
Expand All @@ -182,7 +182,7 @@ void Detector::InitializeO2Detector()
{
LOG(info) << "Initialize RICH O2Detector";
mGeometryTGeo = GeometryTGeo::Instance();
// defineSensitiveVolumes();
defineSensitiveVolumes();
}

void Detector::defineSensitiveVolumes()
Expand All @@ -194,12 +194,19 @@ void Detector::defineSensitiveVolumes()
LOGP(info, "Adding RICH Sensitive Volumes");

// The names of the RICH sensitive volumes have the format: Ring(0...mRings.size()-1)
for (int j{0}; j < mRings.size(); j++) {
volumeName = GeometryTGeo::getRICHSensorPattern() + TString::Itoa(j, 10);
LOGP(info, "Trying {}", volumeName.Data());
v = geoManager->GetVolume(volumeName.Data());
LOGP(info, "Adding RICH Sensitive Volume {}", v->GetName());
AddSensitiveVolume(v);
for (auto ring : mRings) {
for (int j = 0; j < ring.getNTiles(); j++) {
volumeName = Form("%s_%d_%d", GeometryTGeo::getRICHSensorPattern(), ring.getPosId(), j);
LOGP(info, "Trying {}", volumeName.Data());
v = geoManager->GetVolume(volumeName.Data());
if (!v) {
LOG(error) << "Geometry does not contain volume " << volumeName.Data();
geoManager->GetListOfVolumes()->Print();
LOG(fatal) << "Could not find volume " << volumeName.Data() << " in the geometry";
}
LOGP(info, "Adding RICH Sensitive Volume {}", v->GetName());
AddSensitiveVolume(v);
}
}
}

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2 changes: 1 addition & 1 deletion Detectors/Upgrades/ALICE3/RICH/simulation/src/RICHRing.cxx
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Expand Up @@ -106,7 +106,7 @@ Ring::Ring(int rPosId,
photoTile->SetVertex(6, photThick / 2, photYmax / 2);
photoTile->SetVertex(7, photThick / 2, -photYmax / 2);

TGeoVolume* photoTileVol = new TGeoVolume(Form("photoTile_%d_%d", rPosId, photTileCount), photoTile, medSi);
TGeoVolume* photoTileVol = new TGeoVolume(Form("%s_%d_%d", GeometryTGeo::getRICHSensorPattern(), rPosId, photTileCount), photoTile, medSi);
photoTileVol->SetLineColor(kOrange - 8);
photoTileVol->SetLineWidth(1);

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