ALICE3: TRK now hosts IRIS tracker which is divided into petal cases and made retractable

Detectors/Upgrades/ALICE3/FT3/simulation/src/Detector.cxx

@@ -184,8 +184,8 @@ void Detector::buildBasicFT3(const FT3BaseParam& param)
 //_________________________________________________________________________________________________
 void Detector::buildFT3V1()
 {
-  //Build FT3 detector according to
-  //https://indico.cern.ch/event/992488/contributions/4174473/attachments/2168881/3661331/tracker_parameters_werner_jan_11_2021.pdf
+  // Build FT3 detector according to
+  // https://indico.cern.ch/event/992488/contributions/4174473/attachments/2168881/3661331/tracker_parameters_werner_jan_11_2021.pdf
 
   LOG(info) << "Building FT3 Detector: V1";
 
@@ -284,17 +284,15 @@ void Detector::buildFT3NewVacuumVessel()
   // to adhere to the changes that were presented at the ALICE 3 Upgrade days in March 2024
   // Inner radius at C-side to 7 cm
   // Inner radius at A-side stays at 5 cm
+  // 06.02.2025 update: IRIS layers are now in TRK
 
   LOG(info) << "Building FT3 Detector: After Upgrade Days March 2024 version";
 
-  mNumberOfLayers = 12;
+  mNumberOfLayers = 9;
   float sensorThickness = 30.e-4;
   float layersx2X0 = 1.e-2;
   std::vector<std::array<float, 5>> layersConfigCSide{
-    {26., .5, 2.5, 0.1f * layersx2X0}, // {z_layer, r_in, r_out, Layerx2X0}
-    {30., .5, 2.5, 0.1f * layersx2X0},
-    {34., .5, 2.5, 0.1f * layersx2X0},
-    {77., 7.0, 35., layersx2X0},
+    {77., 7.0, 35., layersx2X0}, // {z_layer, r_in, r_out, Layerx2X0}
     {100., 7.0, 35., layersx2X0},
     {122., 7.0, 35., layersx2X0},
     {150., 7.0, 68.f, layersx2X0},
@@ -305,10 +303,7 @@ void Detector::buildFT3NewVacuumVessel()
     {350., 7.0, 68.f, layersx2X0}};
 
   std::vector<std::array<float, 5>> layersConfigASide{
-    {26., .5, 2.5, 0.1f * layersx2X0}, // {z_layer, r_in, r_out, Layerx2X0}
-    {30., .5, 2.5, 0.1f * layersx2X0},
-    {34., .5, 2.5, 0.1f * layersx2X0},
-    {77., 5.0, 35., layersx2X0},
+    {77., 5.0, 35., layersx2X0}, // {z_layer, r_in, r_out, Layerx2X0}
     {100., 5.0, 35., layersx2X0},
     {122., 5.0, 35., layersx2X0},
     {150., 5.0, 68.f, layersx2X0},

Detectors/Upgrades/ALICE3/Passive/include/Alice3DetectorsPassive/Pipe.h

@@ -26,8 +26,6 @@ class Alice3Pipe : public Alice3PassiveBase
   ~Alice3Pipe() override;
   Alice3Pipe(const char* name,
              const char* title = "Alice 3 Pipe",
-             const bool isTRKActivated = false,
-             const bool isFT3Activated = false,
              const float pipeRIn = 0.f,
              const float pipeThickness = 0.f,
              const float a3ipLength = 0.f,
@@ -50,9 +48,6 @@ class Alice3Pipe : public Alice3PassiveBase
   float getVacuumVesselWidth() const { return mVacuumVesselThick; }
   float getVacuumVesselLength() const { return mVacuumVesselASideLength; }
 
-  bool IsTRKActivated() const { return mIsTRKActivated; }
-  bool IsFT3Activated() const { return mIsFT3Activated; }
-
  private:
   void createMaterials();
   Alice3Pipe(const Alice3Pipe& orig) = default;
@@ -62,13 +57,10 @@ class Alice3Pipe : public Alice3PassiveBase
   float mPipeThick = 0.;  // inner beam pipe section thickness
   float mA3IPLength = 0.; // Length of A3IP
 
-  float mVacuumVesselRIn = 0.;    // inner diameter of the vacuum vessel
-  float mVacuumVesselThick = 0.;  // outer beam pipe section thickness
+  float mVacuumVesselRIn = 0.;         // inner diameter of the vacuum vessel
+  float mVacuumVesselThick = 0.;       // outer beam pipe section thickness
   float mVacuumVesselASideLength = 0.; // Length of the A Side of the vacuum vessel around the IP
 
-  bool mIsTRKActivated = true; // If TRK is not active don't create TRK layers allocations in the vacuum volume
-  bool mIsFT3Activated = true;
-
   ClassDefOverride(Alice3Pipe, 1);
 };
 } // namespace passive

Detectors/Upgrades/ALICE3/Passive/src/Pipe.cxx

@@ -12,8 +12,8 @@
 #include "Alice3DetectorsPassive/Pipe.h"
 #include <DetectorsBase/Detector.h>
 #include <DetectorsBase/MaterialManager.h>
-#include <TGeoTube.h>
-#include <TVirtualMC.h>
+#include "TGeoTube.h"
+#include "TVirtualMC.h"
 #include "TGeoManager.h"        // for TGeoManager, gGeoManager
 #include "TGeoMaterial.h"       // for TGeoMaterial
 #include "TGeoMedium.h"         // for TGeoMedium
@@ -31,17 +31,13 @@ using namespace o2::passive;
 Alice3Pipe::Alice3Pipe() : Alice3PassiveBase{"Alice3PIPE", ""} {}
 Alice3Pipe::Alice3Pipe(const char* name,
                        const char* title,
-                       bool isTRKActivated,
-                       bool isFT3Activated,
                        float pipeRIn,
                        float pipeThickness,
                        float a3ipLength,
                        float vacuumVesselRIn,
                        float vacuumVesselThickness,
                        float vacuumVesselASideLength)
   : Alice3PassiveBase{name, title},
-    mIsTRKActivated{isTRKActivated},
-    mIsFT3Activated{isFT3Activated},
     mPipeRIn{pipeRIn},
     mPipeThick{pipeThickness},
     mA3IPLength{a3ipLength},
@@ -85,7 +81,6 @@ void Alice3Pipe::ConstructGeometry()
   auto& matmgr = o2::base::MaterialManager::Instance();
 
   const TGeoMedium* kMedBe = matmgr.getTGeoMedium("ALICE3_PIPE_BE");
-  const TGeoMedium* kMedVac = matmgr.getTGeoMedium("ALICE3_PIPE_VACUUM");
 
   // Top volume
   TGeoVolume* top = gGeoManager->GetVolume("cave");
@@ -96,134 +91,37 @@ void Alice3Pipe::ConstructGeometry()
 
   // We split the naming of the parts if the beam pipe for ALICE 3 into parts
   // - pipe A Side
-  // - vacuum vessel (which hosts the primary vacuum and covers all C Side as well)
-  // - iris vacuum vessel (which hosts the secondary vacuum)
+  // - pipe C Side (which hosts the primary vacuum vessel and covers all C Side as well)
 
   // A3IP update
-  // Vacuum
-  Double_t pipeASideLength = mA3IPLength / 2. - mVacuumVesselThick - mVacuumVesselASideLength;
-  Double_t pipeCSideLength = mA3IPLength / 2. + mVacuumVesselASideLength;
-  TGeoTube* vacuumBasePipe = new TGeoTube("PIPEVACUUM_BASEsh", 0., mPipeRIn, mA3IPLength / 2.);
-  TGeoTube* vacuumBaseVacuumVessel = new TGeoTube("VACUUM_VESSELVACUUM_BASEsh", mPipeRIn, mVacuumVesselRIn, pipeCSideLength / 2.);
-
-  TGeoTranslation* posPipeCSide = new TGeoTranslation("PIPE_CSIDE_POSITION", 0, 0, mVacuumVesselASideLength - pipeCSideLength / 2.);
-  posPipeCSide->RegisterYourself();
-  // Excavate volumes from the vacuum such that there is place for the TRK barrel layers and FT3 disc layers of the IRIS tracker
-  // And the other passive shapes: coldplate, iris tracker vacuum vessel
-  TGeoCompositeShape* vacuumComposite;
-  TGeoVolume* vacuumVolume;
-  TString compositeFormula{"PIPEVACUUM_BASEsh+VACUUM_VESSELVACUUM_BASEsh:PIPE_CSIDE_POSITION"};
-  TString subtractorsFormula;
-
-  if (!mIsTRKActivated) {
-    std::vector<TGeoTube*> trkLayerShapes;
-
-    std::vector<std::array<float, 3>> layersQuotas = {std::array<float, 3>{0.5f, 50.f, 100.e-4}, // TODO: Set layers dynamically. {radius, zLen, thickness}
-                                                      std::array<float, 3>{1.2f, 50.f, 100.e-4},
-                                                      std::array<float, 3>{2.5f, 50.f, 100.e-4}};
-
-    for (auto iLayer{0}; iLayer < layersQuotas.size(); ++iLayer) { // Create TRK layers shapes
-      auto& layerData = layersQuotas[iLayer];
-      trkLayerShapes.emplace_back(new TGeoTube(Form("TRKLAYER_%dsh", iLayer), layerData[0], layerData[0] + layerData[2], layerData[1] / 2.));
-      if (iLayer != 0) {
-        subtractorsFormula += "+";
-      }
-      subtractorsFormula += Form("TRKLAYER_%dsh", iLayer);
-    }
-
-    // IRIS vacuum vessel and coldplate dimensions
-    float coldplateRIn = 2.6f;              // cm
-    float coldplateThick = 150.e-3;         // cm
-    float coldplateLength = 50.f;           // cm
-    float irisVacuumVesselInnerRIn = 0.48f; // cm
-    float irisVacuumVesselOuterRIn = coldplateRIn + coldplateThick;
-    float irisVacuumVesselLength = 70.f;   // cm
-    float irisVacuumVesselThick = 150.e-4; // cm
-
-    // Excavate vacuum for hosting cold plate and IRIS tracker
-    TGeoTube* coldPlate = new TGeoTube("TRK_COLDPLATEsh", coldplateRIn, coldplateRIn + coldplateThick, coldplateLength / 2.);
-    subtractorsFormula += "+TRK_COLDPLATEsh";
-
-    TGeoTube* irisVacuumVesselInner = new TGeoTube("TRK_IRISVACUUMVESSELINNERsh", irisVacuumVesselInnerRIn, irisVacuumVesselInnerRIn + irisVacuumVesselThick, irisVacuumVesselLength / 2.);
-    subtractorsFormula += "+TRK_IRISVACUUMVESSELINNERsh";
-
-    TGeoTube* irisVacuumVesselOuter = new TGeoTube("TRK_IRISVACUUMVESSELOUTERsh", irisVacuumVesselOuterRIn, irisVacuumVesselOuterRIn + irisVacuumVesselThick, irisVacuumVesselLength / 2.);
-    subtractorsFormula += "+TRK_IRISVACUUMVESSELOUTERsh";
-
-    TGeoTube* irisVacuumVesselWall = new TGeoTube("TRK_IRISVACUUMVESSELWALLsh", irisVacuumVesselInnerRIn, irisVacuumVesselOuterRIn + irisVacuumVesselThick, irisVacuumVesselThick / 2.);
-    TGeoTranslation* posIrisVacVWallNegZSide = new TGeoTranslation("IRISWALLNEGZ", 0., 0., -irisVacuumVesselLength / 2. - irisVacuumVesselThick / 2.);
-    posIrisVacVWallNegZSide->RegisterYourself();
-    subtractorsFormula += "+TRK_IRISVACUUMVESSELWALLsh:IRISWALLNEGZ";
-
-    TGeoTranslation* posIrisVacVWallPosZSide = new TGeoTranslation("IRISWALLPOSZ", 0., 0., irisVacuumVesselLength / 2. + irisVacuumVesselThick / 2.);
-    posIrisVacVWallPosZSide->RegisterYourself();
-    subtractorsFormula += "+TRK_IRISVACUUMVESSELWALLsh:IRISWALLPOSZ";
-  }
-
-  if (!mIsFT3Activated) {
-    std::vector<TGeoTube*> ft3DiscShapes;
-    std::vector<TGeoTranslation*> ft3DiscPositions;
-
-    std::vector<std::array<float, 4>> discsQuotas = {std::array<float, 4>{0.5f, 2.5f, 100.e-4, 26.}, // TODO: Set discs dynamically. {rIn, rOut, thickness, zpos}
-                                                     std::array<float, 4>{0.5f, 2.5f, 100.e-4, 30.},
-                                                     std::array<float, 4>{0.5f, 2.5f, 100.e-4, 34.},
-                                                     std::array<float, 4>{0.5f, 2.5f, 100.e-4, -26.},
-                                                     std::array<float, 4>{0.5f, 2.5f, 100.e-4, -30.},
-                                                     std::array<float, 4>{0.5f, 2.5f, 100.e-4, -34.}};
-    TString tempSubtractorsFormula = "";
-    if (!mIsTRKActivated) {
-      tempSubtractorsFormula = "+";
-    }
-    for (auto iDisc{0}; iDisc < discsQuotas.size(); ++iDisc) {
-      auto& discData = discsQuotas[iDisc];
-      ft3DiscShapes.emplace_back(new TGeoTube(Form("FT3DISC_%dsh", iDisc), discData[0], discData[1], discData[2] / 2.));
-      ft3DiscPositions.emplace_back(new TGeoTranslation(Form("t%d", iDisc), 0., 0., discData[3]));
-      ft3DiscPositions[iDisc]->RegisterYourself();
-      if (iDisc != 0) {
-        tempSubtractorsFormula += "+";
-      }
-      tempSubtractorsFormula += Form("FT3DISC_%dsh:t%d", iDisc, iDisc);
-    }
-    subtractorsFormula += tempSubtractorsFormula;
-  }
+  Double_t pipeASideLength = mA3IPLength / 2. - mVacuumVesselThick - mVacuumVesselASideLength / 2.;
+  Double_t pipeCSideLength = mA3IPLength / 2. + mVacuumVesselASideLength / 2.;
 
   // Pipe tubes
   TGeoTube* pipeASide = new TGeoTube("PIPE_Ash", mPipeRIn, mPipeRIn + mPipeThick, pipeASideLength / 2.);
   TGeoTube* pipeCSide = new TGeoTube("PIPE_Csh", mVacuumVesselRIn, mVacuumVesselRIn + mVacuumVesselThick, pipeCSideLength / 2.);
   TGeoTube* vacuumVesselWall = new TGeoTube("VACUUM_VESSEL_WALLsh", mPipeRIn, mVacuumVesselRIn + mVacuumVesselThick, mVacuumVesselThick / 2.);
 
   // Pipe and vacuum vessel positions
-  TGeoTranslation* posVacuumVesselWall = new TGeoTranslation("WALL_POSITION", 0, 0, mVacuumVesselASideLength + mVacuumVesselThick / 2.);
-  posVacuumVesselWall->RegisterYourself();
-  TGeoTranslation* posPipeASide = new TGeoTranslation("PIPE_ASIDE_POSITION", 0, 0, mVacuumVesselASideLength + mVacuumVesselThick + pipeASideLength / 2.);
+  TGeoTranslation* posPipeASide = new TGeoTranslation("PIPE_ASIDE_POSITION", 0, 0, mVacuumVesselASideLength / 2. + mVacuumVesselThick + pipeASideLength / 2.);
   posPipeASide->RegisterYourself();
+  TGeoTranslation* posPipeCSide = new TGeoTranslation("PIPE_CSIDE_POSITION", 0, 0, mVacuumVesselASideLength / 2. - pipeCSideLength / 2.);
+  posPipeCSide->RegisterYourself();
+  TGeoTranslation* posVacuumVesselWall = new TGeoTranslation("WALL_POSITION", 0, 0, mVacuumVesselASideLength / 2. + mVacuumVesselThick / 2.);
+  posVacuumVesselWall->RegisterYourself();
 
   // Pipe composite shape and volume
   TString pipeCompositeFormula =
-    "VACUUM_VESSEL_WALLsh:WALL_POSITION"
-    "+PIPE_Ash:PIPE_ASIDE_POSITION"
-    "+PIPE_Csh:PIPE_CSIDE_POSITION";
-
-  if (subtractorsFormula.Length()) {
-    LOG(info) << "Subtractors formula before : " << subtractorsFormula;
-    subtractorsFormula = Form("-(%s)", subtractorsFormula.Data());
-    LOG(info) << "Subtractors formula after: " << subtractorsFormula;
-
-    vacuumComposite = new TGeoCompositeShape("VACUUM_BASEsh", (compositeFormula + subtractorsFormula).Data());
-    vacuumVolume = new TGeoVolume("VACUUM_BASE", vacuumComposite, kMedVac);
-  } else {
-    vacuumComposite = new TGeoCompositeShape("VACUUM_BASEsh", compositeFormula.Data());
-    vacuumVolume = new TGeoVolume("VACUUM_BASE", vacuumComposite, kMedVac);
-  }
+    "PIPE_Ash:PIPE_ASIDE_POSITION"
+    "+PIPE_Csh:PIPE_CSIDE_POSITION"
+    "+VACUUM_VESSEL_WALLsh:WALL_POSITION";
 
   TGeoCompositeShape* pipeComposite = new TGeoCompositeShape("A3IPsh", pipeCompositeFormula);
   TGeoVolume* pipeVolume = new TGeoVolume("A3IP", pipeComposite, kMedBe);
 
   // Add everything to the barrel
-  barrel->AddNode(vacuumVolume, 1, new TGeoTranslation(0, 30.f, 0));
   barrel->AddNode(pipeVolume, 1, new TGeoTranslation(0, 30.f, 0));
 
-  vacuumVolume->SetLineColor(kGreen + 3);
   pipeVolume->SetLineColor(kGreen + 3);
 }
 
@@ -236,15 +134,6 @@ void Alice3Pipe::createMaterials()
   float sxmgmx = 10.;
   o2::base::Detector::initFieldTrackingParams(isxfld, sxmgmx);
 
-  //
-  // Air
-  //
-  float aAir[4] = {12.0107, 14.0067, 15.9994, 39.948};
-  float zAir[4] = {6., 7., 8., 18.};
-  float wAir[4] = {0.000124, 0.755267, 0.231781, 0.012827};
-  float dAir = 1.20479E-3;
-  float dAir1 = 1.20479E-11;
-
   // ****************
   //     Defines tracking media parameters.
   //
@@ -258,13 +147,8 @@ void Alice3Pipe::createMaterials()
   auto& matmgr = o2::base::MaterialManager::Instance();
 
   // Beryllium
-  matmgr.Material("ALICE3_PIPE", 5, "BERILLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
+  matmgr.Material("ALICE3_PIPE", 5, "BERYLLIUM$", 9.01, 4., 1.848, 35.3, 36.7);
   matmgr.Medium("ALICE3_PIPE", 5, "BE", 5, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
-
-  // Vacuum
-  matmgr.Mixture("ALICE3_PIPE", 16, "VACUUM$ ", aAir, zAir, dAir1, 4, wAir);
-
-  matmgr.Medium("ALICE3_PIPE", 16, "VACUUM", 16, 0, isxfld, sxmgmx, tmaxfd, stemax, deemax, epsil, stmin);
 }
 
 // ----------------------------------------------------------------------------

Detectors/Upgrades/ALICE3/TRK/base/include/TRKBase/TRKBaseParam.h

@@ -29,6 +29,8 @@ enum eLayout {
 struct TRKBaseParam : public o2::conf::ConfigurableParamHelper<TRKBaseParam> {
   std::string configFile = "";
   float serviceTubeX0 = 0.02f; // X0 Al2O3
+  Bool_t irisOpen = false;
+
   eLayout layoutML = kCylinder; // Type of segmentation for the middle layers
   eLayout layoutOL = kCylinder; // Type of segmentation for the outer layers
 

Detectors/Upgrades/ALICE3/TRK/simulation/CMakeLists.txt

@@ -13,11 +13,17 @@ o2_add_library(TRKSimulation
                SOURCES src/TRKLayer.cxx
                        src/Detector.cxx
                        src/TRKServices.cxx
+                       src/TRKPetalCase.cxx
+                       src/TRKPetalLayer.cxx
+                       src/TRKPetalDisk.cxx
                PUBLIC_LINK_LIBRARIES O2::TRKBase
                                      O2::FT3Simulation
                                      O2::ITSMFTSimulation)
 
 o2_target_root_dictionary(TRKSimulation
                           HEADERS include/TRKSimulation/Detector.h
                                   include/TRKSimulation/TRKLayer.h
-                                  include/TRKSimulation/TRKServices.h)
+                                  include/TRKSimulation/TRKServices.h
+                                  include/TRKSimulation/TRKPetalCase.h
+                                  include/TRKSimulation/TRKPetalLayer.h
+                                  include/TRKSimulation/TRKPetalDisk.h)

Detectors/Upgrades/ALICE3/TRK/simulation/include/TRKSimulation/Detector.h

@@ -17,6 +17,7 @@
 
 #include "TRKSimulation/TRKLayer.h"
 #include "TRKSimulation/TRKServices.h"
+#include "TRKSimulation/TRKPetalCase.h"
 #include "TRKBase/GeometryTGeo.h"
 
 #include <TLorentzVector.h>
@@ -87,7 +88,11 @@ class Detector : public o2::base::DetImpl<Detector>
   GeometryTGeo* mGeometryTGeo;         //!
   std::vector<o2::itsmft::Hit>* mHits; // ITSMFT ones for the moment
   std::vector<TRKLayer> mLayers;
-  TRKServices mServices;
+  TRKServices mServices;                 // Houses the services of the TRK, but not the Iris tracker
+  std::vector<TRKPetalCase> mPetalCases; // Houses the Iris tracker and its services. Created fully in the beam pipe
+
+  std::vector<std::string> mFirstOrLastLayers; // Names of the first or last layers
+  bool InsideFirstOrLastLayer(std::string layerName);
 
   void defineSensitiveVolumes();