TRKServices.cxx

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
#include <DetectorsBase/MaterialManager.h>
#include <Framework/Logger.h>
 
#include <TColor.h>
#include <TGeoBBox.h>
#include <TGeoCompositeShape.h>
#include <TGeoNode.h>
#include <TGeoTube.h>
#include <TGeoVolume.h>
#include <TMath.h>
#include <TRKBase/GeometryTGeo.h>
#include <TRKBase/Specs.h>
#include <TRKBase/TRKBaseParam.h>
#include <TRKSimulation/TRKServices.h>
 
#include <Rtypes.h>
 
#include <cmath>
#include <numeric>
#include <string>
 
namespace o2
{
namespace trk
{
 
void TRKServices::createMaterials()
{
  int ifield = 2;      // ?
  float fieldm = 10.0; // ?
 
  // Defines tracking media parameters.
  float epsil = .1;     // Tracking precision,
  float stemax = -0.01; // Maximum displacement for multiple scat
  float tmaxfd = -20.;  // Maximum angle due to field deflection
  float deemax = -.3;   // Maximum fractional energy loss, DLS
  float stmin = -.8;
 
  auto& matmgr = o2::base::MaterialManager::Instance();
 
  // Ceramic (Aluminium Oxide)
  float aCer[2] = {26.981538, 15.9994};
  float zCer[2] = {13., 8.};
  float wCer[2] = {0.5294, 0.4706}; // Mass %, which makes sense. TODO: check if Mixture needs mass% or comp%
  float dCer = 3.97;
 
  // 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; // vacuum denisity inside pipe
 
  // Water
  float aWater[2] = {1.00794, 15.9994};
  float zWater[2] = {1., 8.};
  float wWater[2] = {0.111894, 0.888106};
  float dWater = 1.0;
 
  // Fused silica SiO2 https://pdg.lbl.gov/2023/AtomicNuclearProperties/HTML/silicon_dioxide_fused_quartz.html
  float aSiO2[2] = {28.0855, 15.9990};
  float zSiO2[2] = {14., 8.};
  float wSiO2[2] = {0.467, 0.533};
  float dSiO2 = 2.2;
 
  // Polyethylene from alice 2 absorber
  float aPolyethylene[2] = {12.01, 1.};
  float zPolyethylene[2] = {6., 1.};
  float wPolyethylene[2] = {.33, .67};
 
  // Polyurethane [HN-CO-O] from alice 2 mft
  int nPolyurethane = 4;
  float aPolyurethane[4] = {1.00794, 14.010, 12.0107, 15.9994};
  float zPolyurethane[4] = {1.0, 7.0, 6.0, 8.0};
  float wPolyurethane[4] = {0.017077588, 0.237314387, 0.203327619, 0.542280405};
  float dPolyurethane = 1.25;
 
  // Aluminium 5083 - alloy of Mn, Fe, Cu, Mg, Si, Zn, Cr, Ti, Al
  // Al5083 is considered as material for the iris vacuum vessel
  // https://www.smithmetal.com/5083.htm
  float aAl5083[9] = {54.938, 55.845, 63.546, 24.305, 28.086, 65.38, 51.996, 47.867, 26.982};
  float zAl5083[9] = {25., 26., 29., 12., 14., 30., 24., 22., 13.};
  // The concentration of certain metals in Al5083 have a range. What will be used for the alloy for the iris vacuum vessel will have to be checked
  float wAl5083[9] = {0.007, 0.004, 0.001, 0.0445, 0.004, 0.0025, 0.0015, 0.0015, 0.934};
  float dAl5083 = 2.650;
 
  // AlBeMet AM162H is a nanocomposite, not an alloy
  // Considered here as well https://indico.cern.ch/event/1168385/contributions/5355805/attachments/2681743/4652030/Jul%2010%201030-1045%20AM%20(Hawaii)%20M1Or1C-05%20AlBeMet.pdf
  float aAlBeMet[2] = {26.982, 9.012};
  float zAlBeMet[2] = {13., 4.};
  float wAlBeMet[2] = {0.38, 0.62};
  float dAlBeMet = 2.071;
 
  matmgr.Mixture("ALICE3_TRKSERVICES", 66, "CERAMIC", aCer, zCer, dCer, 2, wCer);                                                      // Ceramic for cold plate
  matmgr.Mixture("ALICE3_TRKSERVICES", 68, "AIR", aAir, zAir, dAir, 4, wAir);                                                          // Air for placeholding cables
  matmgr.Mixture("ALICE3_TRKSERVICES", 69, "POLYETHYLENE", aPolyethylene, zPolyethylene, .95, 2, wPolyethylene);                       // Polyethylene for fibers
  matmgr.Mixture("ALICE3_TRKSERVICES", 70, "POLYURETHANE", aPolyurethane, zPolyurethane, dPolyurethane, nPolyurethane, wPolyurethane); // Polyurethane for cooling pipes
  matmgr.Mixture("ALICE3_TRKSERVICES", 71, "SILICONDIOXIDE", aSiO2, zSiO2, dSiO2, 2, wSiO2);                                           // Fused silica SiO2
  matmgr.Mixture("ALICE3_TRKSERVICES", 72, "WATER", aWater, zWater, dWater, 2, wWater);                                                // Water for cooling pipes
  matmgr.Material("ALICE3_TRKSERVICES", 67, "COPPER", 63.546, 29, 8.96, 1.43, 15.1);                                                   // Copper for cables
  matmgr.Material("ALICE3_TRKSERVICES", 73, "BERYLLIUM", 9.01, 4., 1.848, 35.3, 36.7);                                                 // Beryllium - Candidate for IRIS vacuum vessel
  matmgr.Mixture("ALICE3_TRKSERVICES", 74, "ALUMINIUM5083", aAl5083, zAl5083, dAl5083, 9, wAl5083);                                    // AL5083 - Candidate for IRIS vacuum vessel
  matmgr.Mixture("ALICE3_TRKSERVICES", 75, "ALUMINIUMBERYLLIUMMETAL", aAlBeMet, zAlBeMet, dAlBeMet, 2, wAlBeMet);                      // Aluminium-Beryllium metal - Candidate for IRIS vacuum vessel
  matmgr.Material("ALICE3_TRKSERVICES", 76, "CARBONFIBERM55J6K", 12.0107, 6, 1.92, 22.4, 45.4);                                        // Carbon Fiber M55J
  matmgr.Material("ALICE3_TRKSERVICES", 78, "ALUMINIUM", 26.9815, 13, 2.70, 8.897, 39.70);                                             // Aluminium for the IRIS service modules
  matmgr.Mixture("ALICE3_PIPE", 77, "VACUUM", aAir, zAir, dAir1, 4, wAir);
 
  matmgr.Medium("ALICE3_TRKSERVICES", 1, "CERAMIC", 66, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);                  // Ceramic for cold plate
  matmgr.Medium("ALICE3_TRKSERVICES", 2, "COPPER", 67, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);                   // Copper for cables
  matmgr.Medium("ALICE3_TRKSERVICES", 3, "AIR", 68, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);                      // Air for placeholding cables
  matmgr.Medium("ALICE3_TRKSERVICES", 4, "POLYETHYLENE", 69, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);             // Polyethylene for fibers
  matmgr.Medium("ALICE3_TRKSERVICES", 5, "POLYURETHANE", 70, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);             // Polyurethane for cooling pipes
  matmgr.Medium("ALICE3_TRKSERVICES", 6, "SILICONDIOXIDE", 71, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);           // Fused silica SiO2
  matmgr.Medium("ALICE3_TRKSERVICES", 7, "WATER", 72, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);                    // Water for cooling pipes
  matmgr.Medium("ALICE3_TRKSERVICES", 8, "BERYLLIUM", 73, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);                // Beryllium for IRIS vacuum vessel
  matmgr.Medium("ALICE3_TRKSERVICES", 9, "ALUMINIUM5083", 74, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);            // Al5083 for IRIS vacuum vessel
  matmgr.Medium("ALICE3_TRKSERVICES", 10, "ALUMINIUMBERYLLIUMMETAL", 75, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin); // AlBeMet for IRIS vacuum vessel
  matmgr.Medium("ALICE3_TRKSERVICES", 11, "CARBONFIBERM55J6K", 76, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);       // Carbon Fiber M55J
  matmgr.Medium("ALICE3_PIPE", 12, "VACUUM", 77, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);                         // Vacuum inside the beam pipe
  matmgr.Medium("ALICE3_TRKSERVICES", 13, "ALUMINIUM", 78, 0, ifield, fieldm, tmaxfd, stemax, deemax, epsil, stmin);               // Aluminium for the IRIS service modules
}
 
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(vol);
    createOuterDisksServices(vol);
    createOuterBarrelServices(vol);
  } else {
    LOGP(info, "TRK services: Peacock layout");
    if (trkPars.includeLowServices) {
      createServicesAroundBeamPipe(vol);
    }
    createMLServicesPeacock(vol);
    createOTServicesPeacock(vol);
    createOTBarrelWalls(vol);
  }
}
 
void TRKServices::createVacuumCompositeShape()
{
  Double_t pipeRIn = 1.8f;
  Double_t A3IPLength = 1000.f;
  Double_t vacuumVesselRIn = 5.6f;
  Double_t vacuumVesselThickness = 0.08f;
  Double_t vacuumVesselLength = 76.f;
 
  // Vacuum for A and C Side
  Double_t vacuumASideLength = A3IPLength / 2. - vacuumVesselThickness - vacuumVesselLength / 2.;
  Double_t vacuumCSideLength = A3IPLength / 2. + vacuumVesselLength / 2.;
 
  // Vacuum tubes
  TGeoTube* vacuumASide = new TGeoTube("VACUUM_Ash", 0., pipeRIn, vacuumASideLength / 2.);
  TGeoTube* vacuumCSide = new TGeoTube("VACUUM_Csh", 0., vacuumVesselRIn, vacuumCSideLength / 2.);
 
  // Vacuum positions
  TGeoTranslation* posVacuumASide = new TGeoTranslation("VACUUM_ASIDE_POSITION", 0, 0, vacuumVesselLength / 2. + vacuumVesselThickness + vacuumASideLength / 2.);
  posVacuumASide->RegisterYourself();
  TGeoTranslation* posVacuumCSide = new TGeoTranslation("VACUUM_CSIDE_POSITION", 0, 0, vacuumVesselLength / 2. - vacuumCSideLength / 2.);
  posVacuumCSide->RegisterYourself();
 
  mVacuumCompositeFormula =
    "VACUUM_Ash:VACUUM_ASIDE_POSITION"
    "+VACUUM_Csh:VACUUM_CSIDE_POSITION";
}
 
void TRKServices::excavateFromVacuum(TString shapeToExcavate)
{
  mVacuumCompositeFormula += "-";
  mVacuumCompositeFormula += shapeToExcavate;
}
 
void TRKServices::registerVacuum(TGeoVolume* motherVolume)
{
  auto& matmgr = o2::base::MaterialManager::Instance();
  const TGeoMedium* kMedVac = matmgr.getTGeoMedium("ALICE3_PIPE_VACUUM");
 
  TGeoCompositeShape* vacuumComposite = new TGeoCompositeShape("A3IP_VACUUMsh", mVacuumCompositeFormula);
  TGeoVolume* vacuumVolume = new TGeoVolume("A3IP_VACUUM", vacuumComposite, kMedVac);
 
  // Add the vacuum to the barrel
  vacuumVolume->SetLineColor(kAzure + 6);
  vacuumVolume->SetTransparency(80);
 
  motherVolume->AddNode(vacuumVolume, 1, new TGeoTranslation(0, 0, 0));
}
 
void TRKServices::createOuterDisksServices(TGeoVolume* motherVolume)
{
  // This method hardcoes the pink shape for the inner services
  auto& matmgr = o2::base::MaterialManager::Instance();
 
  TGeoMedium* medSiO2 = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_SILICONDIOXIDE");
  TGeoMedium* medPE = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_POLYETHYLENE");
  TGeoMedium* medCu = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_COPPER");
  TGeoMedium* medPU = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_POLYURETHANE");
  TGeoMedium* medH2O = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_WATER");
 
  for (auto& orientation : {Orientation::kASide, Orientation::kCSide}) {
    // Create fibers: 2.12mm
    float siO2FiberThick = 0.5 * 0.212;
    float peFiberThick = 0.5 * 0.212;
 
    float rMinInnerServices = 68.5f;                                           // 68.5cm
    float zLengthInnerServices = 201.f;                                        // 201cm
    float translation = (int)orientation * (149.f + zLengthInnerServices / 2); // ±149cm
 
    TGeoTube* outerDisksFiberSIO2 = new TGeoTube("TRK_OUTERDISKS_FIBER_SIO2sh", rMinInnerServices, rMinInnerServices + siO2FiberThick, zLengthInnerServices / 2);
    TGeoTube* outerDisksFiberPE = new TGeoTube("TRK_OUTERDISKS_FIBER_PEsh", rMinInnerServices + siO2FiberThick, rMinInnerServices + siO2FiberThick + peFiberThick, zLengthInnerServices / 2);
    rMinInnerServices += siO2FiberThick + peFiberThick;
    TGeoVolume* outerDisksFiberSIO2Volume = new TGeoVolume("TRK_OUTERDISKS_FIBER_SIO2", outerDisksFiberSIO2, medSiO2);
    TGeoVolume* outerDisksFiberPEVolume = new TGeoVolume("TRK_OUTERDISKS_FIBER_PE", outerDisksFiberPE, medPE);
    outerDisksFiberSIO2Volume->SetLineColor(kGray);
    outerDisksFiberPEVolume->SetLineColor(kGray);
    auto* combiTrans = new TGeoCombiTrans(0, 0, translation, nullptr);
    motherVolume->AddNode(outerDisksFiberSIO2Volume, 1, combiTrans);
    motherVolume->AddNode(outerDisksFiberPEVolume, 1, combiTrans);
 
    // Create power lines: 11.86mm
    float cuPowerThick = 0.09 * 1.186;
    float pePowerThick = 0.91 * 1.186;
 
    TGeoTube* outerDisksPowerCu = new TGeoTube("TRK_OUTERDISKS_POWER_CUsh", rMinInnerServices, rMinInnerServices + cuPowerThick, zLengthInnerServices / 2);
    TGeoTube* outerDisksPowerPE = new TGeoTube("TRK_OUTERDISKS_POWER_PEsh", rMinInnerServices + cuPowerThick, rMinInnerServices + cuPowerThick + pePowerThick, zLengthInnerServices / 2);
    rMinInnerServices += cuPowerThick + pePowerThick;
    TGeoVolume* outerDisksPowerCuVolume = new TGeoVolume("TRK_OUTERDISKS_POWER_CU", outerDisksPowerCu, medCu);
    TGeoVolume* outerDisksPowerPEVolume = new TGeoVolume("TRK_OUTERDISKS_POWER_PE", outerDisksPowerPE, medPE);
    outerDisksPowerCuVolume->SetLineColor(kGray);
    outerDisksPowerPEVolume->SetLineColor(kGray);
    motherVolume->AddNode(outerDisksPowerCuVolume, 1, combiTrans);
    motherVolume->AddNode(outerDisksPowerPEVolume, 1, combiTrans);
 
    // Create cooling: 6.47mm
    float puCoolingThick = 0.56 * 0.647;
    float h2oCoolingThick = 0.44 * 0.647;
 
    TGeoTube* outerDisksCoolingPU = new TGeoTube("TRK_OUTERDISKS_COOLING_PUsh", rMinInnerServices, rMinInnerServices + puCoolingThick, zLengthInnerServices / 2);
    TGeoTube* outerDisksCoolingH2O = new TGeoTube("TRK_OUTERDISKS_COOLING_H2Osh", rMinInnerServices + puCoolingThick, rMinInnerServices + puCoolingThick + h2oCoolingThick, zLengthInnerServices / 2);
    // rMinInnerServices += puCoolingThick + h2oCoolingThick;
    TGeoVolume* outerDisksCoolingPUVolume = new TGeoVolume("TRK_OUTERDISKS_COOLING_PU", outerDisksCoolingPU, medPU);
    TGeoVolume* outerDisksCoolingH2OVolume = new TGeoVolume("TRK_OUTERDISKS_COOLING_H2O", outerDisksCoolingH2O, medH2O);
    outerDisksCoolingPUVolume->SetLineColor(kGray);
    outerDisksCoolingH2OVolume->SetLineColor(kGray);
    motherVolume->AddNode(outerDisksCoolingPUVolume, 1, combiTrans);
    motherVolume->AddNode(outerDisksCoolingH2OVolume, 1, combiTrans);
  }
}
 
void TRKServices::createMiddleServices(TGeoVolume* motherVolume)
{
  // This method hardcoes the yellow shape for the middle services
  auto& matmgr = o2::base::MaterialManager::Instance();
 
  TGeoMedium* medSiO2 = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_SILICONDIOXIDE");
  TGeoMedium* medPE = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_POLYETHYLENE");
  TGeoMedium* medCu = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_COPPER");
  TGeoMedium* medPU = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_POLYURETHANE");
  TGeoMedium* medH2O = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_WATER");
  TGeoMedium* medCFiber = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_CARBONFIBERM55J6K");
 
  // Create fibers: 3.07mm, 50% SiO2, 50% PE
  float siO2FiberThick = 0.5 * 0.307;
  float peFiberThick = 0.5 * 0.307;
  float puCoolingThick = 0.56 * 0.474;
  float h2oCoolingThick = 0.44 * 0.474;
  float cuPowerThick = 0.09 * 1.09;
  float pePowerThick = 0.91 * 1.09;
  const float totalThickness = siO2FiberThick + peFiberThick + cuPowerThick + pePowerThick + puCoolingThick + h2oCoolingThick;
 
  // Carbon Fiber Cylinder support for the middle tracker
  float rMinMiddleCarbonSupport = 34.8f; // Arbitrary value
  float rMaxMiddleCarbonSupport = 35.f;  // 2 mm of carbon fiber
  const float zLengthMiddleCarbon = 129.f;
  TGeoTube* middleBarrelCarbonSupport = new TGeoTube("TRK_MID_CARBONSUPPORTsh", rMinMiddleCarbonSupport, rMaxMiddleCarbonSupport, zLengthMiddleCarbon / 2.);
  TGeoVolume* middleBarrelCarbonSupportVolume = new TGeoVolume("TRK_MID_CARBONSUPPORT", middleBarrelCarbonSupport, medCFiber);
  middleBarrelCarbonSupportVolume->SetLineColor(kGray);
  LOGP(info, "Creating carbon fiber support for Middle Tracker");
  motherVolume->AddNode(middleBarrelCarbonSupportVolume, 1, nullptr);
 
  // Get geometry information from TRK which is already present
  float rMinMiddleServices = 35.f;
  float rMinMiddleBarrel = rMinMiddleServices;
  const float zLengthCylinderMiddleServices = 40.5f;
  const float zLengthMiddleServices = 143.f;
  for (auto& orientation : {Orientation::kASide, Orientation::kCSide}) {
    rMinMiddleServices = 35.f;
    LOGP(info, "Building services for Middle Tracker rminMiddleServices");
    TGeoTube* middleBarrelFiberSIO2 = new TGeoTube(Form("TRK_MID_FIBER_SIO2sh_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), rMinMiddleServices, rMinMiddleServices + siO2FiberThick, zLengthCylinderMiddleServices /* + totalThickness*/);
    rMinMiddleServices += siO2FiberThick;
    TGeoTube* middleBarrelFiberPE = new TGeoTube(Form("TRK_MID_FIBER_PEsh_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), rMinMiddleServices, rMinMiddleServices + peFiberThick, zLengthCylinderMiddleServices /* + totalThickness*/);
    rMinMiddleServices += peFiberThick;
    TGeoVolume* middleBarrelFiberSIO2Volume = new TGeoVolume(Form("TRK_MID_FIBER_SIO2_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), middleBarrelFiberSIO2, medSiO2);
    TGeoVolume* middleBarrelFiberPEVolume = new TGeoVolume(Form("TRK_MID_FIBER_PE_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), middleBarrelFiberPE, medPE);
    middleBarrelFiberSIO2Volume->SetLineColor(kGray);
    middleBarrelFiberPEVolume->SetLineColor(kGray);
    auto* combiTrans = new TGeoCombiTrans(0, 0, (int)orientation * (zLengthMiddleServices - zLengthCylinderMiddleServices), nullptr);
    motherVolume->AddNode(middleBarrelFiberSIO2Volume, 1, combiTrans);
    motherVolume->AddNode(middleBarrelFiberPEVolume, 1, combiTrans);
 
    // Create powerlines: 10.9mm, 9% Cu, 91% PE
    TGeoTube* middleBarrelPowerCu = new TGeoTube(Form("TRK_MID_POWER_CUsh_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), rMinMiddleServices, rMinMiddleServices + cuPowerThick, zLengthCylinderMiddleServices /* + totalThickness*/);
    rMinMiddleServices += cuPowerThick;
    TGeoTube* middleBarrelPowerPE = new TGeoTube(Form("TRK_MID_POWER_PEsh_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), rMinMiddleServices, rMinMiddleServices + pePowerThick, zLengthCylinderMiddleServices /* + totalThickness*/);
    rMinMiddleServices += pePowerThick;
    TGeoVolume* middleBarrelPowerCuVolume = new TGeoVolume(Form("TRK_MID_POWER_CU_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), middleBarrelPowerCu, medCu);
    TGeoVolume* middleBarrelPowerPEVolume = new TGeoVolume(Form("TRK_MID_POWER_PE_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), middleBarrelPowerPE, medPE);
    middleBarrelPowerCuVolume->SetLineColor(kGray);
    middleBarrelPowerPEVolume->SetLineColor(kGray);
    motherVolume->AddNode(middleBarrelPowerCuVolume, 1, combiTrans);
    motherVolume->AddNode(middleBarrelPowerPEVolume, 1, combiTrans);
 
    // Create cooling pipes: 4.74mm, 56% PU, 44% H2O
    TGeoTube* middleBarrelCoolingPU = new TGeoTube(Form("TRK_MID_COOLING_PUsh_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), rMinMiddleServices, rMinMiddleServices + puCoolingThick, zLengthCylinderMiddleServices /* + totalThickness*/);
    rMinMiddleServices += puCoolingThick;
    TGeoTube* middleBarrelCoolingH2O = new TGeoTube(Form("TRK_MID_COOLING_H2Osh_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), rMinMiddleServices, rMinMiddleServices + h2oCoolingThick, zLengthCylinderMiddleServices /* + totalThickness*/);
    rMinMiddleServices = rMinMiddleServices += h2oCoolingThick;
    TGeoVolume* middleBarrelCoolingPUVolume = new TGeoVolume(Form("TRK_MID_COOLING_PU_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), middleBarrelCoolingPU, medPU);
    TGeoVolume* middleBarrelCoolingH2OVolume = new TGeoVolume(Form("TRK_MID_COOLING_H2O_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), middleBarrelCoolingH2O, medH2O);
    middleBarrelCoolingPUVolume->SetLineColor(kGray);
    middleBarrelCoolingH2OVolume->SetLineColor(kGray);
    motherVolume->AddNode(middleBarrelCoolingPUVolume, 1, combiTrans);
    motherVolume->AddNode(middleBarrelCoolingH2OVolume, 1, combiTrans);
  }
  // Middle barrel connection disks
  const float rMinMiddleBarrelDisk = 5.68f;
  const float rMaxMiddleBarrelDisk = 35.f;
  const float zLengthMiddleBarrel = 64.5f;
  for (auto& orientation : {Orientation::kASide, Orientation::kCSide}) {
    TGeoTube* middleBarrelConnDiskSIO2 = new TGeoTube(Form("TRK_MIDBARCONN_DISK_FIBER_SIO2sh_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), rMinMiddleBarrelDisk, rMaxMiddleBarrelDisk, siO2FiberThick / 2.);
    TGeoTube* middleBarrelConnDiskPE = new TGeoTube(Form("TRK_MIDBARCONN_DISK_FIBER_PEsh_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), rMinMiddleBarrelDisk, rMaxMiddleBarrelDisk, peFiberThick / 2.);
    TGeoVolume* middleBarrelConnDiskSIO2Volume = new TGeoVolume(Form("TRK_MIDBARCONN_DISK_FIBER_SIO2_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), middleBarrelConnDiskSIO2, medSiO2);
    TGeoVolume* middleBarrelConnDiskPEVolume = new TGeoVolume(Form("TRK_MIDBARCONN_DISK_FIBER_PE_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), middleBarrelConnDiskPE, medPE);
    middleBarrelConnDiskSIO2Volume->SetLineColor(kGray);
    middleBarrelConnDiskPEVolume->SetLineColor(kGray);
    auto* rot = new TGeoRotation("", 0, 0, 180);
    auto* combiTransSIO2 = new TGeoCombiTrans(0, 0, (int)orientation * (siO2FiberThick / 2. + zLengthMiddleBarrel), rot);
    auto* combiTransPE = new TGeoCombiTrans(0, 0, (int)orientation * (siO2FiberThick + peFiberThick / 2. + zLengthMiddleBarrel), rot);
    motherVolume->AddNode(middleBarrelConnDiskSIO2Volume, 1, combiTransSIO2);
    motherVolume->AddNode(middleBarrelConnDiskPEVolume, 1, combiTransPE);
 
    TGeoTube* middleBarrelConnDiskCu = new TGeoTube(Form("TRK_MIDBARCONN_DISK_POWER_CUsh_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), rMinMiddleBarrelDisk, rMaxMiddleBarrelDisk, cuPowerThick / 2.);
    TGeoTube* middleBarrelConnDiskPEPower = new TGeoTube(Form("TRK_MIDBARCONN_DISK_POWER_PEsh_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), rMinMiddleBarrelDisk, rMaxMiddleBarrelDisk, pePowerThick / 2.);
    TGeoVolume* middleBarrelConnDiskCuVolume = new TGeoVolume(Form("TRK_MIDBARCONN_DISK_POWER_CU_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), middleBarrelConnDiskCu, medCu);
    TGeoVolume* middleBarrelConnDiskPEPowerVolume = new TGeoVolume(Form("TRK_MIDBARCONN_DISK_POWER_PE_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), middleBarrelConnDiskPEPower, medPE);
    middleBarrelConnDiskCuVolume->SetLineColor(kGray);
    middleBarrelConnDiskPEPowerVolume->SetLineColor(kGray);
    auto* combiTransCu = new TGeoCombiTrans(0, 0, (int)orientation * (siO2FiberThick + peFiberThick + cuPowerThick / 2. + zLengthMiddleBarrel), rot);
    auto* combiTransPEPower = new TGeoCombiTrans(0, 0, (int)orientation * (siO2FiberThick + peFiberThick + cuPowerThick + pePowerThick / 2. + zLengthMiddleBarrel), rot);
    motherVolume->AddNode(middleBarrelConnDiskCuVolume, 1, combiTransCu);
    motherVolume->AddNode(middleBarrelConnDiskPEPowerVolume, 1, combiTransPEPower);
 
    TGeoTube* middleBarrelConnDiskPU = new TGeoTube(Form("TRK_MIDBARCONN_DISK_PUsh_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), rMinMiddleBarrelDisk, rMaxMiddleBarrelDisk, puCoolingThick / 2.);
    TGeoTube* middleBarrelConnDiskH2O = new TGeoTube(Form("TRK_MIDBARCONN_DISK_H2Osh_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), rMinMiddleBarrelDisk, rMaxMiddleBarrelDisk, h2oCoolingThick / 2.);
    TGeoVolume* middleBarrelConnDiskPUVolume = new TGeoVolume(Form("TRK_MIDBARCONN_DISK_PU_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), middleBarrelConnDiskPU, medPU);
    TGeoVolume* middleBarrelConnDiskH2OVolume = new TGeoVolume(Form("TRK_MIDBARCONN_DISK_H2O_%s", orientation == Orientation::kASide ? "bwd" : "fwd"), middleBarrelConnDiskH2O, medH2O);
    middleBarrelConnDiskPUVolume->SetLineColor(kGray);
    middleBarrelConnDiskH2OVolume->SetLineColor(kGray);
    auto* combiTransPU = new TGeoCombiTrans(0, 0, (int)orientation * (siO2FiberThick + peFiberThick + cuPowerThick + pePowerThick + puCoolingThick / 2. + zLengthMiddleBarrel), rot);
    auto* combiTransH2O = new TGeoCombiTrans(0, 0, (int)orientation * (siO2FiberThick + peFiberThick + cuPowerThick + pePowerThick + puCoolingThick + h2oCoolingThick / 2. + zLengthMiddleBarrel), rot);
    motherVolume->AddNode(middleBarrelConnDiskPUVolume, 1, combiTransPU);
    motherVolume->AddNode(middleBarrelConnDiskH2OVolume, 1, combiTransH2O);
  }
 
  // Barrel to forward connection disks
  float rMaxMiddleServicesBarFwd = 74.5f + siO2FiberThick + peFiberThick + cuPowerThick + pePowerThick + puCoolingThick + h2oCoolingThick;
  for (auto& orientation : {Orientation::kASide, Orientation::kCSide}) {
    // Create fibers: 3.07mm, 50% SiO2, 50% PE
    TGeoTube* middleBarFwdFiberSIO2 = new TGeoTube("TRK_MIDBARFWD_FIBER_SIO2sh", rMinMiddleBarrel, rMaxMiddleServicesBarFwd, siO2FiberThick / 2.);
    TGeoTube* middleBarFwdFiberPE = new TGeoTube("TRK_MIDBARFWD_FIBER_PEsh", rMinMiddleBarrel, rMaxMiddleServicesBarFwd, peFiberThick / 2.);
    TGeoVolume* middleBarFwdFiberSIO2Volume = new TGeoVolume("TRK_MIDBARFWD_FIBER_SIO2", middleBarFwdFiberSIO2, medSiO2);
    TGeoVolume* middleBarFwdFiberPEVolume = new TGeoVolume("TRK_MIDBARFWD_FIBER_PE", middleBarFwdFiberPE, medPE);
    middleBarFwdFiberSIO2Volume->SetLineColor(kGray);
    middleBarFwdFiberPEVolume->SetLineColor(kGray);
    auto* rot = new TGeoRotation("", 0, 0, 180);
    auto* combiTransSIO2 = new TGeoCombiTrans(0, 0, (int)orientation * (siO2FiberThick / 2. + zLengthMiddleServices), rot);
    auto* combiTransPE = new TGeoCombiTrans(0, 0, (int)orientation * (siO2FiberThick + peFiberThick / 2. + zLengthMiddleServices), rot);
    motherVolume->AddNode(middleBarFwdFiberSIO2Volume, 1, combiTransSIO2);
    motherVolume->AddNode(middleBarFwdFiberPEVolume, 1, combiTransPE);
 
    // Create powerlines: 10.9mm, 9% Cu, 91% PE
    TGeoTube* middleBarFwdPowerCu = new TGeoTube("TRK_MIDBARFWD_POWER_CUsh", rMinMiddleBarrel, rMaxMiddleServicesBarFwd, cuPowerThick / 2.);
    TGeoTube* middleBarFwdPowerPE = new TGeoTube("TRK_MIDBARFWD_POWER_PEsh", rMinMiddleBarrel, rMaxMiddleServicesBarFwd, pePowerThick / 2.);
    TGeoVolume* middleBarFwdPowerCuVolume = new TGeoVolume("TRK_MIDBARFWD_POWER_CU", middleBarFwdPowerCu, medCu);
    TGeoVolume* middleBarFwdPowerPEVolume = new TGeoVolume("TRK_MIDBARFWD_POWER_PE", middleBarFwdPowerPE, medPE);
    middleBarFwdPowerCuVolume->SetLineColor(kGray);
    middleBarFwdPowerPEVolume->SetLineColor(kGray);
    auto* combiTransCu = new TGeoCombiTrans(0, 0, (int)orientation * (siO2FiberThick + peFiberThick + cuPowerThick / 2. + zLengthMiddleServices), rot);
    auto* combiTransPEPower = new TGeoCombiTrans(0, 0, (int)orientation * (siO2FiberThick + peFiberThick + cuPowerThick + pePowerThick / 2. + zLengthMiddleServices), rot);
    motherVolume->AddNode(middleBarFwdPowerCuVolume, 1, combiTransCu);
    motherVolume->AddNode(middleBarFwdPowerPEVolume, 1, combiTransPEPower);
 
    // Create cooling pipes: 4.74mm, 56% PU, 44% H2O
    TGeoTube* middleBarFwdCoolingPU = new TGeoTube("TRK_MIDBARFWD_COOLING_PUsh", rMinMiddleBarrel, rMaxMiddleServicesBarFwd, puCoolingThick / 2.);
    TGeoTube* middleBarFwdCoolingH2O = new TGeoTube("TRK_MIDBARFWD_COOLING_H2Osh", rMinMiddleBarrel, rMaxMiddleServicesBarFwd, h2oCoolingThick / 2.);
    TGeoVolume* middleBarFwdCoolingPUVolume = new TGeoVolume("TRK_MIDBARFWD_COOLING_PU", middleBarFwdCoolingPU, medPU);
    TGeoVolume* middleBarFwdCoolingH2OVolume = new TGeoVolume("TRK_MIDBARFWD_COOLING_H2O", middleBarFwdCoolingH2O, medH2O);
    middleBarFwdCoolingPUVolume->SetLineColor(kGray);
    middleBarFwdCoolingH2OVolume->SetLineColor(kGray);
    auto* combiTransCoolingPU = new TGeoCombiTrans(0, 0, (int)orientation * (siO2FiberThick + peFiberThick + cuPowerThick + pePowerThick + puCoolingThick / 2. + zLengthMiddleServices), rot);
    auto* combiTransCoolingH2O = new TGeoCombiTrans(0, 0, (int)orientation * (siO2FiberThick + peFiberThick + cuPowerThick + pePowerThick + puCoolingThick + h2oCoolingThick / 2. + zLengthMiddleServices), rot);
    motherVolume->AddNode(middleBarFwdCoolingPUVolume, 1, combiTransCoolingPU);
    motherVolume->AddNode(middleBarFwdCoolingH2OVolume, 1, combiTransCoolingH2O);
  }
 
  // Forward part
  const float zLengthMiddleServicesFwd = 350.f - (143.f + totalThickness);
 
  for (auto& orientation : {Orientation::kASide, Orientation::kCSide}) {
    // Create fibers: 3.07mm, 50% SiO2, 50% PE
    float siO2FiberThick = 0.5 * 0.307;
    float peFiberThick = 0.5 * 0.307;
    float rMinMiddleServicesFwd = 74.5f; // 74.5cm
 
    float translation = (int)orientation * (143.f + totalThickness + zLengthMiddleServicesFwd / 2);
 
    TGeoTube* middleFwdFiberSIO2 = new TGeoTube("TRK_MIDFWD_FIBER_SIO2sh", rMinMiddleServicesFwd, rMinMiddleServicesFwd + siO2FiberThick, zLengthMiddleServicesFwd / 2);
    TGeoTube* middleFwdFiberPE = new TGeoTube("TRK_MIDFWD_FIBER_PEsh", rMinMiddleServicesFwd + siO2FiberThick, rMinMiddleServicesFwd + siO2FiberThick + peFiberThick, zLengthMiddleServicesFwd / 2);
    rMinMiddleServicesFwd += siO2FiberThick + peFiberThick;
    TGeoVolume* middleFwdFiberSIO2Volume = new TGeoVolume("TRK_MIDFWD_FIBER_SIO2", middleFwdFiberSIO2, medSiO2);
    TGeoVolume* middleFwdFiberPEVolume = new TGeoVolume("TRK_MIDFWD_FIBER_PE", middleFwdFiberPE, medPE);
    middleFwdFiberSIO2Volume->SetLineColor(kGray);
    middleFwdFiberPEVolume->SetLineColor(kGray);
    auto* combiTrans = new TGeoCombiTrans(0, 0, translation, nullptr);
    motherVolume->AddNode(middleFwdFiberSIO2Volume, 1, combiTrans);
    motherVolume->AddNode(middleFwdFiberPEVolume, 1, combiTrans);
 
    // Create powerlines: 10.9mm, 9% Cu, 91% PE
    float cuPowerThick = 0.09 * 1.09;
    float pePowerThick = 0.91 * 1.09;
 
    TGeoTube* middleFwdPowerCu = new TGeoTube("TRK_MIDFWD_POWER_CUsh", rMinMiddleServicesFwd, rMinMiddleServicesFwd + cuPowerThick, zLengthMiddleServicesFwd / 2);
    TGeoTube* middleFwdPowerPE = new TGeoTube("TRK_MIDFWD_POWER_PEsh", rMinMiddleServicesFwd + cuPowerThick, rMinMiddleServicesFwd + cuPowerThick + pePowerThick, zLengthMiddleServicesFwd / 2);
    rMinMiddleServicesFwd += cuPowerThick + pePowerThick;
    TGeoVolume* middleFwdPowerCuVolume = new TGeoVolume("TRK_MIDFWD_POWER_CU", middleFwdPowerCu, medCu);
    TGeoVolume* middleFwdPowerPEVolume = new TGeoVolume("TRK_MIDFWD_POWER_PE", middleFwdPowerPE, medPE);
    middleFwdPowerCuVolume->SetLineColor(kGray);
    middleFwdPowerPEVolume->SetLineColor(kGray);
    motherVolume->AddNode(middleFwdPowerCuVolume, 1, combiTrans);
    motherVolume->AddNode(middleFwdPowerPEVolume, 1, combiTrans);
 
    // Create cooling pipes: 4.74mm, 56% PU, 44% H2O
    float puCoolingThick = 0.56 * 0.474;
    float h2oCoolingThick = 0.44 * 0.474;
 
    TGeoTube* middleFwdCoolingPU = new TGeoTube("TRK_MIDFWD_COOLING_PUsh", rMinMiddleServicesFwd, rMinMiddleServicesFwd + puCoolingThick, zLengthMiddleServicesFwd / 2);
    TGeoTube* middleFwdCoolingH2O = new TGeoTube("TRK_MIDFWD_COOLING_H2Osh", rMinMiddleServicesFwd + puCoolingThick, rMinMiddleServicesFwd + puCoolingThick + h2oCoolingThick, zLengthMiddleServicesFwd / 2);
    // rMinMiddleServicesFwd += puCoolingThick + h2oCoolingThick;
    TGeoVolume* middleFwdCoolingPUVolume = new TGeoVolume("TRK_MIDFWD_COOLING_PU", middleFwdCoolingPU, medPU);
    TGeoVolume* middleFwdCoolingH2OVolume = new TGeoVolume("TRK_MIDFWD_COOLING_H2O", middleFwdCoolingH2O, medH2O);
    middleFwdCoolingPUVolume->SetLineColor(kGray);
    middleFwdCoolingH2OVolume->SetLineColor(kGray);
    motherVolume->AddNode(middleFwdCoolingPUVolume, 1, combiTrans);
    motherVolume->AddNode(middleFwdCoolingH2OVolume, 1, combiTrans);
  }
}
 
void TRKServices::createOuterBarrelServices(TGeoVolume* motherVolume)
{
  // This implements a service barrel around the full outer tracker which is probably not needed:
  // power, data and cooling should be implemented on the staves
  // Used only for 'LOI' geometry
 
  auto& matmgr = o2::base::MaterialManager::Instance();
 
  TGeoMedium* medSiO2 = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_SILICONDIOXIDE");
  TGeoMedium* medPE = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_POLYETHYLENE");
  TGeoMedium* medCu = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_COPPER");
  TGeoMedium* medPU = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_POLYURETHANE");
  TGeoMedium* medH2O = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_WATER");
 
  // Fiber 0.269 cm
  const float siO2FiberThick = 0.5 * 0.269;
  const float peFiberThick = 0.5 * 0.269;
  float rMinOuterBarrelServices = ((TGeoTube*)motherVolume->GetNode(Form("%s7_1", GeometryTGeo::getTRKLayerPattern()))->GetVolume()->GetShape())->GetRmax();
  const float zLengthOuterBarrelServices = 350.f; // 175cm
 
  TGeoTube* outerBarrelFiberSIO2 = new TGeoTube("TRK_OUTERBARREL_FIBER_SIO2sh", rMinOuterBarrelServices, rMinOuterBarrelServices + siO2FiberThick, zLengthOuterBarrelServices);
  TGeoTube* outerBarrelFiberPE = new TGeoTube("TRK_OUTERBARREL_FIBER_PEsh", rMinOuterBarrelServices + siO2FiberThick, rMinOuterBarrelServices + siO2FiberThick + peFiberThick, zLengthOuterBarrelServices);
  rMinOuterBarrelServices += siO2FiberThick + peFiberThick;
  TGeoVolume* outerBarrelFiberSIO2Volume = new TGeoVolume("TRK_OUTERBARREL_FIBER_SIO2", outerBarrelFiberSIO2, medSiO2);
  TGeoVolume* outerBarrelFiberPEVolume = new TGeoVolume("TRK_OUTERBARREL_FIBER_PE", outerBarrelFiberPE, medPE);
  outerBarrelFiberSIO2Volume->SetLineColor(kGray);
  outerBarrelFiberPEVolume->SetLineColor(kGray);
  motherVolume->AddNode(outerBarrelFiberSIO2Volume, 1, nullptr);
  motherVolume->AddNode(outerBarrelFiberPEVolume, 1, nullptr);
 
  // Power 0.430 cm
  const float cuPowerThick = 0.09 * 0.430;
  const float pePowerThick = 0.91 * 0.430;
 
  TGeoTube* outerBarrelPowerCu = new TGeoTube("TRK_OUTERBARREL_POWER_CUsh", rMinOuterBarrelServices, rMinOuterBarrelServices + cuPowerThick, zLengthOuterBarrelServices);
  TGeoTube* outerBarrelPowerPE = new TGeoTube("TRK_OUTERBARREL_POWER_PEsh", rMinOuterBarrelServices + cuPowerThick, rMinOuterBarrelServices + cuPowerThick + pePowerThick, zLengthOuterBarrelServices);
  rMinOuterBarrelServices += cuPowerThick + pePowerThick;
  TGeoVolume* outerBarrelPowerCuVolume = new TGeoVolume("TRK_OUTERBARREL_POWER_CU", outerBarrelPowerCu, medCu);
  TGeoVolume* outerBarrelPowerPEVolume = new TGeoVolume("TRK_OUTERBARREL_POWER_PE", outerBarrelPowerPE, medPE);
  outerBarrelPowerCuVolume->SetLineColor(kGray);
  outerBarrelPowerPEVolume->SetLineColor(kGray);
  motherVolume->AddNode(outerBarrelPowerCuVolume, 1, nullptr);
  motherVolume->AddNode(outerBarrelPowerPEVolume, 1, nullptr);
 
  // Cooling 1.432 cm
  const float puCoolingThick = 0.56 * 1.432;
  const float h2oCoolingThick = 0.44 * 1.432;
 
  TGeoTube* outerBarrelCoolingPU = new TGeoTube("TRK_OUTERBARREL_COOLING_PUsh", rMinOuterBarrelServices, rMinOuterBarrelServices + puCoolingThick, zLengthOuterBarrelServices);
  TGeoTube* outerBarrelCoolingH2O = new TGeoTube("TRK_OUTERBARREL_COOLING_H2Osh", rMinOuterBarrelServices + puCoolingThick, rMinOuterBarrelServices + puCoolingThick + h2oCoolingThick, zLengthOuterBarrelServices);
  // rMinOuterBarrelServices += puCoolingThick + h2oCoolingThick;
  TGeoVolume* outerBarrelCoolingPUVolume = new TGeoVolume("TRK_OUTERBARREL_COOLING_PU", outerBarrelCoolingPU, medPU);
  TGeoVolume* outerBarrelCoolingH2OVolume = new TGeoVolume("TRK_OUTERBARREL_COOLING_H2O", outerBarrelCoolingH2O, medH2O);
  outerBarrelCoolingPUVolume->SetLineColor(kGray);
  outerBarrelCoolingH2OVolume->SetLineColor(kGray);
  motherVolume->AddNode(outerBarrelCoolingPUVolume, 1, nullptr);
  motherVolume->AddNode(outerBarrelCoolingH2OVolume, 1, nullptr);
}
 
void TRKServices::createServicesAroundBeamPipe(TGeoVolume* motherVolume)
{
  // This method hardcodes the shape for the low services around the beam pipe
  auto& matmgr = o2::base::MaterialManager::Instance();
 
  TGeoMedium* medCu = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_COPPER");
 
  const float tolleranceLowServices = 0.3f;
 
  // Low services start longitudinally from middle barrel on the C side, while from the middle barrel connection disks on the A side
  const float zStartASideFirstBlock = 65.265f + tolleranceLowServices;
  const float zStartCSideFirstBlock = 64.5f + tolleranceLowServices;
  const float zStartSecondBlock = 150.f;
  const float zStartThirdBlock = 365.f;
  const float zEndThirdBlock = 400.f;
 
  // Low services start radially from IRIS out-vacuum services on the A side, while from beam pipe on the C side
  const float rInASide = 3.333f + tolleranceLowServices;
  const float rInCSide = 5.6f + tolleranceLowServices;
 
  // Low services end radially at the disks inners radius
  const float rOutFirstBlock = 10.f - tolleranceLowServices;
  const float rOutSecondBlock = 20.f - tolleranceLowServices;
  const float rOutThirdBlock = 15.f - tolleranceLowServices;
 
  for (auto& orientation : {Orientation::kASide, Orientation::kCSide}) {
    std::string orLabel = orientation == Orientation::kASide ? "A" : "C";
 
    float zStartLowServices = orientation == Orientation::kASide ? zStartASideFirstBlock : zStartCSideFirstBlock;
    float rInLowServices = orientation == Orientation::kASide ? rInASide : rInCSide;
 
    TGeoTube* lowServicesFirstBlock = new TGeoTube(Form("TRK_LOWSERVICES_FIRSTBLOCKsh_%s", orLabel.c_str()), rInLowServices, rOutFirstBlock, (zStartSecondBlock - zStartLowServices) / 2.);
    TGeoVolume* lowServicesFirstBlockVolume = new TGeoVolume(Form("TRK_LOWSERVICES_FIRSTBLOCK_%s", orLabel.c_str()), lowServicesFirstBlock, medCu);
    lowServicesFirstBlockVolume->SetLineColor(kGray);
 
    TGeoTube* lowServicesSecondBlock = new TGeoTube(Form("TRK_LOWSERVICES_SECONDBLOCKsh_%s", orLabel.c_str()), rInLowServices, rOutSecondBlock, (zStartThirdBlock - zStartSecondBlock) / 2.);
    TGeoVolume* lowServicesSecondBlockVolume = new TGeoVolume(Form("TRK_LOWSERVICES_SECONDBLOCK_%s", orLabel.c_str()), lowServicesSecondBlock, medCu);
    lowServicesSecondBlockVolume->SetLineColor(kGray);
 
    TGeoTube* lowServicesThirdBlock = new TGeoTube(Form("TRK_LOWSERVICES_THIRDBLOCKsh_%s", orLabel.c_str()), rInLowServices, rOutThirdBlock, (zEndThirdBlock - zStartThirdBlock) / 2.);
    TGeoVolume* lowServicesThirdBlockVolume = new TGeoVolume(Form("TRK_LOWSERVICES_THIRDBLOCK_%s", orLabel.c_str()), lowServicesThirdBlock, medCu);
    lowServicesThirdBlockVolume->SetLineColor(kGray);
 
    auto* rot = new TGeoRotation("", 0, 0, 180);
    auto* combiTransFirstBlock = new TGeoCombiTrans(0, 0, (int)orientation * (zStartLowServices + (zStartSecondBlock - zStartLowServices) / 2.), rot);
    auto* combiTransSecondBlock = new TGeoCombiTrans(0, 0, (int)orientation * (zStartSecondBlock + (zStartThirdBlock - zStartSecondBlock) / 2.), rot);
    auto* combiTransThirdBlock = new TGeoCombiTrans(0, 0, (int)orientation * (zStartThirdBlock + (zEndThirdBlock - zStartThirdBlock) / 2.), rot);
 
    motherVolume->AddNode(lowServicesFirstBlockVolume, 1, combiTransFirstBlock);
    motherVolume->AddNode(lowServicesSecondBlockVolume, 1, combiTransSecondBlock);
    motherVolume->AddNode(lowServicesThirdBlockVolume, 1, combiTransThirdBlock);
  }
}
 
void TRKServices::createMLServicesPeacock(TGeoVolume* motherVolume)
{
  // This method hardcodes the yellow shape for the middle services
  auto& matmgr = o2::base::MaterialManager::Instance();
 
  TGeoMedium* medSiO2 = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_SILICONDIOXIDE");
  TGeoMedium* medPE = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_POLYETHYLENE");
  TGeoMedium* medCu = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_COPPER");
  TGeoMedium* medPU = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_POLYURETHANE");
  TGeoMedium* medH2O = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_WATER");
  TGeoMedium* medCFiber = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_CARBONFIBERM55J6K");
 
  // Barrel service constants
  const int ITBarrelnFiber = 70;
  const int ITBarrelnPower = 70;
  float siO2FiberAreaB = ITBarrelnFiber * mFiberArea * mFiberComposition[0];
  float peFiberAreaB = ITBarrelnFiber * mFiberArea * mFiberComposition[1];
 
  float puCoolingAreaB = 0;
  float h2oCoolingAreaB = 0;
  float cuPowerAreaB = ITBarrelnPower * mPowerBundleArea * mPowerBundleComposition[0];
  float pePowerAreaB = ITBarrelnPower * mPowerBundleArea * mPowerBundleComposition[1];
 
  // Disk service constants
  const int ITDisknFiber = 3 * 24;
  const int ITDisknPower = 3 * 16;
  float siO2FiberAreaD = ITDisknFiber * mFiberArea * mFiberComposition[0];
  float peFiberAreaD = ITDisknFiber * mFiberArea * mFiberComposition[1];
 
  float puCoolingAreaD = 0;
  float h2oCoolingAreaD = 0;
  float cuPowerAreaD = ITDisknPower * mPowerBundleArea * mPowerBundleComposition[0];
  float pePowerAreaD = ITDisknPower * mPowerBundleArea * mPowerBundleComposition[1];
 
  // Carbon Fiber Cylinder support for the middle tracker
  // (from ICD_ALICE3_V3.b.3 drawing: 38.5 cm are allocated for staves and services, + 1 cm for the support; we assume less for the support - to be reconsidered if necessary)
  float rMaxMiddleCarbonSupport = sMLOTShellRMax;                       // cm
  float rMinMiddleCarbonSupport = sMLOTShellRMax - sMLOTShellThickness; // cm, 2 mm of carbon fiber, ~0.88% X/X0
  const float zLengthMiddleCarbon = 282.f;                              // cm, to cover the full length of ML barrel and disks, from Corrado's drawing
  TGeoTube* middleBarrelCarbonSupport = new TGeoTube("TRK_MID_CARBONSUPPORTsh", rMinMiddleCarbonSupport, rMaxMiddleCarbonSupport, zLengthMiddleCarbon / 2.);
  TGeoVolume* middleBarrelCarbonSupportVolume = new TGeoVolume("TRK_MID_CARBONSUPPORT", middleBarrelCarbonSupport, medCFiber);
  middleBarrelCarbonSupportVolume->SetLineColor(kGray);
  LOGP(info, "Creating carbon fiber support for Middle Tracker");
  motherVolume->AddNode(middleBarrelCarbonSupportVolume, 1, nullptr);
 
  // Get geometry information from TRK which is already present
  float rMinMiddleServices = 38.0f;                       // cm, start radius of the ML services = maximum radius allowed for sensors (35 cm), plus some margin for disk paving with modules
  const float zMiddleServicesBarrel = 74.0f;              // cm, z position of the first barrel ML service disk
  const float zMiddleServicesBarrelFwdConnection = 143.f; // cm, z position of barrel to forward connection services
  const float zLengthCylinderMiddleServicesBarrel = zMiddleServicesBarrelFwdConnection - zMiddleServicesBarrel;
 
  const float zStartServicesForMiddleDisks = 77.0f; // cm, starting z position of ML disk services, assumed to be the same as of the first ML disk
  const float zLengthCylinderMiddleServicesDisk = zMiddleServicesBarrelFwdConnection - zStartServicesForMiddleDisks;
 
  // Middle layer barrel services are only on A side
  LOGP(info, "Building services for barrel Middle Layers");
 
  // Middle barrel connection disks
  const float rMinMiddleBarrelDisk = 5.68f;
  const float rMaxMiddleBarrelDisk = rMinMiddleServices;
  auto orientation = Orientation::kASide;
  float diskCircumference = rMaxMiddleBarrelDisk * 3.14; // Use only half circumference
 
  double zCur = zMiddleServicesBarrel;
  double dZ = siO2FiberAreaB / diskCircumference / 2.;
  TGeoTube* middleBarrelConnDiskSIO2 = new TGeoTube("TRK_MIDBARCONN_DISK_FIBER_SIO2sh", rMinMiddleBarrelDisk, rMaxMiddleBarrelDisk, dZ);
  TGeoVolume* middleBarrelConnDiskSIO2Volume = new TGeoVolume("TRK_MIDBARCONN_DISK_FIBER_SIO2", middleBarrelConnDiskSIO2, medSiO2);
  middleBarrelConnDiskSIO2Volume->SetLineColor(kOrange - 9);
  auto* rot = new TGeoRotation("", 0, 0, 180); // Why this?
  auto* combiTransSIO2 = new TGeoCombiTrans(0, 0, (int)orientation * (zCur + dZ), rot);
 
  zCur += 2. * dZ;
  dZ = peFiberAreaB / diskCircumference / 2.;
  TGeoTube* middleBarrelConnDiskPE = new TGeoTube("TRK_MIDBARCONN_DISK_FIBER_PEsh", rMinMiddleBarrelDisk, rMaxMiddleBarrelDisk, dZ);
  TGeoVolume* middleBarrelConnDiskPEVolume = new TGeoVolume("TRK_MIDBARCONN_DISK_FIBER_PE", middleBarrelConnDiskPE, medPE);
  middleBarrelConnDiskPEVolume->SetLineColor(kOrange - 9);
  auto* combiTransPE = new TGeoCombiTrans(0, 0, (int)orientation * (zCur + dZ), rot);
 
  motherVolume->AddNode(middleBarrelConnDiskSIO2Volume, 1, combiTransSIO2);
  motherVolume->AddNode(middleBarrelConnDiskPEVolume, 1, combiTransPE);
 
  zCur += 2. * dZ;
  dZ = cuPowerAreaB / diskCircumference / 2.;
  TGeoTube* middleBarrelConnDiskCu = new TGeoTube("TRK_MIDBARCONN_DISK_POWER_CUsh", rMinMiddleBarrelDisk, rMaxMiddleBarrelDisk, dZ);
  TGeoVolume* middleBarrelConnDiskCuVolume = new TGeoVolume("TRK_MIDBARCONN_DISK_POWER_CU", middleBarrelConnDiskCu, medCu);
  middleBarrelConnDiskCuVolume->SetLineColor(kOrange - 9);
  auto* combiTransCu = new TGeoCombiTrans(0, 0, (int)orientation * (zCur + dZ), rot);
 
  zCur += 2. * dZ;
  dZ = pePowerAreaB / diskCircumference / 2.;
  TGeoTube* middleBarrelConnDiskPEPower = new TGeoTube("TRK_MIDBARCONN_DISK_POWER_PEsh", rMinMiddleBarrelDisk, rMaxMiddleBarrelDisk, dZ);
  TGeoVolume* middleBarrelConnDiskPEPowerVolume = new TGeoVolume("TRK_MIDBARCONN_DISK_POWER_PE", middleBarrelConnDiskPEPower, medPE);
  middleBarrelConnDiskPEPowerVolume->SetLineColor(kOrange - 9);
  auto* combiTransPEPower = new TGeoCombiTrans(0, 0, (int)orientation * (zCur + dZ), rot);
  motherVolume->AddNode(middleBarrelConnDiskCuVolume, 1, combiTransCu);
  motherVolume->AddNode(middleBarrelConnDiskPEPowerVolume, 1, combiTransPEPower);
 
  for (auto& orientation : {Orientation::kASide, Orientation::kCSide}) {
    for (int iSide = 0; iSide < 2; iSide++) { // left/right or top/bottom
      float refAngle = 0;
      std::string orLabel("A");
      if (orientation == Orientation::kCSide) {
        orLabel = "C";
        refAngle = 90;
      }
      // Add ML Disk services
      // create data fiber volumes
      double rCur = rMinMiddleServices;
      double dR = siO2FiberAreaD / (3.14 * rCur);
      TGeoTubeSeg* middleDiskFiberSIO2 = new TGeoTubeSeg(Form("TRK_MLD_FIBER_SIO2sh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthCylinderMiddleServicesDisk / 2, -45, 45);
      TGeoVolume* middleDiskFiberSIO2Volume = new TGeoVolume(Form("TRK_MLD_FIBER_SIO2_%s%d", orLabel.c_str(), iSide), middleDiskFiberSIO2, medSiO2);
      middleDiskFiberSIO2Volume->SetLineColor(kOrange + 1);
 
      rCur += dR;
      dR = peFiberAreaD / (3.14 * rCur);
      TGeoTubeSeg* middleDiskFiberPE = new TGeoTubeSeg(Form("TRK_MLD_FIBER_PEsh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthCylinderMiddleServicesDisk / 2, -45, 45);
      TGeoVolume* middleDiskFiberPEVolume = new TGeoVolume(Form("TRK_MLD_FIBER_PE_%s%d", orLabel.c_str(), iSide), middleDiskFiberPE, medPE);
      middleDiskFiberPEVolume->SetLineColor(kOrange + 1);
      auto* combiTrans = new TGeoCombiTrans(0, 0, (int)orientation * (zMiddleServicesBarrelFwdConnection - zLengthCylinderMiddleServicesDisk / 2), new TGeoRotation("", refAngle + iSide * 180., 0, 0));
      motherVolume->AddNode(middleDiskFiberSIO2Volume, 1, combiTrans);
      motherVolume->AddNode(middleDiskFiberPEVolume, 1, combiTrans);
 
      // Create powerlines
      rCur += dR;
      dR = cuPowerAreaD / (3.14 * rCur);
      TGeoTubeSeg* middleDiskPowerCu = new TGeoTubeSeg(Form("TRK_MLD_POWER_CUsh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthCylinderMiddleServicesDisk / 2, -45, 45);
      TGeoVolume* middleDiskPowerCuVolume = new TGeoVolume(Form("TRK_MLD_POWER_CU_%s%d", orLabel.c_str(), iSide), middleDiskPowerCu, medCu);
      middleDiskPowerCuVolume->SetLineColor(kOrange + 1);
 
      rCur += dR;
      dR = pePowerAreaD / (3.14 * rCur);
      TGeoTubeSeg* middleDiskPowerPE = new TGeoTubeSeg(Form("TRK_MLD_POWER_PEsh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthCylinderMiddleServicesDisk / 2, -45, 45);
      TGeoVolume* middleDiskPowerPEVolume = new TGeoVolume(Form("TRK_MLD_POWER_PE_%s%d", orLabel.c_str(), iSide), middleDiskPowerPE, medPE);
      middleDiskPowerPEVolume->SetLineColor(kOrange + 1);
 
      motherVolume->AddNode(middleDiskPowerCuVolume, 1, combiTrans);
      motherVolume->AddNode(middleDiskPowerPEVolume, 1, combiTrans);
 
      if (orientation == Orientation::kASide) {
        // Add Barrel services
        // create data fiber volumes
        rCur += dR;
        dR = siO2FiberAreaB / (3.14 * rCur);
        TGeoTubeSeg* middleBarrelFiberSIO2 = new TGeoTubeSeg(Form("TRK_MLB_FIBER_SIO2sh_A%d", iSide), rCur, rCur + dR, zLengthCylinderMiddleServicesBarrel / 2, -45, 45);
        TGeoVolume* middleBarrelFiberSIO2Volume = new TGeoVolume(Form("TRK_MLB_FIBER_SIO2_A%d", iSide), middleBarrelFiberSIO2, medSiO2);
        middleBarrelFiberSIO2Volume->SetLineColor(kOrange - 9);
 
        rCur += dR;
        dR = peFiberAreaB / (3.14 * rCur);
        TGeoTubeSeg* middleBarrelFiberPE = new TGeoTubeSeg(Form("TRK_MLB_FIBER_PEsh_A%d", iSide), rCur, rCur + dR, zLengthCylinderMiddleServicesBarrel / 2, -45, 45);
        TGeoVolume* middleBarrelFiberPEVolume = new TGeoVolume(Form("TRK_MLB_FIBER_PE_A%d", iSide), middleBarrelFiberPE, medPE);
        middleBarrelFiberPEVolume->SetLineColor(kOrange - 9);
        auto* combiTrans = new TGeoCombiTrans(0, 0, (int)orientation * (zMiddleServicesBarrelFwdConnection - zLengthCylinderMiddleServicesBarrel / 2), new TGeoRotation(nullptr, refAngle + iSide * 180., 0, 0));
        motherVolume->AddNode(middleBarrelFiberSIO2Volume, 1, combiTrans);
        motherVolume->AddNode(middleBarrelFiberPEVolume, 1, combiTrans);
 
        // Create powerlines
        rCur += dR;
        dR = cuPowerAreaB / (3.14 * rCur);
        TGeoTubeSeg* middleBarrelPowerCu = new TGeoTubeSeg(Form("TRK_MLB_POWER_CUsh_A%d", iSide), rCur, rCur + dR, zLengthCylinderMiddleServicesBarrel / 2, -45, 45);
        TGeoVolume* middleBarrelPowerCuVolume = new TGeoVolume(Form("TRK_MLB_POWER_CU_A%d", iSide), middleBarrelPowerCu, medCu);
        middleBarrelPowerCuVolume->SetLineColor(kOrange - 9);
 
        rCur += dR;
        dR = pePowerAreaB / (3.14 * rCur);
        TGeoTubeSeg* middleBarrelPowerPE = new TGeoTubeSeg(Form("TRK_MLB_POWER_PEsh_A%d", iSide), rCur, rCur + dR, zLengthCylinderMiddleServicesBarrel / 2, -45, 45);
        TGeoVolume* middleBarrelPowerPEVolume = new TGeoVolume(Form("TRK_MLB_POWER_PE_A%d", iSide), middleBarrelPowerPE, medPE);
        middleBarrelPowerPEVolume->SetLineColor(kOrange - 9);
 
        motherVolume->AddNode(middleBarrelPowerCuVolume, 1, combiTrans);
        motherVolume->AddNode(middleBarrelPowerPEVolume, 1, combiTrans);
 
        // TODO: add cooling ducts/pipes
      }
    }
  }
 
  // Barrel to forward connection disks
  // A side: barrel + disk services
  // C side: only disk services
  float rMaxMiddleServicesBarFwd = 74.5f;              // TODO: add thickness of service barrels
  float rMinMiddleBarrel = rMinMiddleServices;         // min radius of the service disk
  diskCircumference = rMaxMiddleServicesBarFwd * 3.14; // Only half of the area is used
  for (auto& orientation : {Orientation::kASide, Orientation::kCSide}) {
    float refAngle = 0;
    std::string orLabel("A");
    if (orientation == Orientation::kCSide) {
      refAngle = 90;
      orLabel = "C";
    }
    double totalThickness = 0;
    for (int iSide = 0; iSide < 2; iSide++) {
      // Create fibers
      double zCur = zMiddleServicesBarrelFwdConnection; // Change to f
      double dZ = siO2FiberAreaD / diskCircumference / 2.;
      totalThickness += 2 * dZ;
      if (orientation == Orientation::kASide) {
        dZ += siO2FiberAreaB / diskCircumference / 2.;
      }
      TGeoTubeSeg* middleBarFwdFiberSIO2 = new TGeoTubeSeg(Form("TRK_MIDBARFWD_FIBER_SIO2sh_%s%d", orLabel.c_str(), iSide), rMinMiddleBarrel, rMaxMiddleServicesBarFwd, dZ, -45, 45);
      TGeoVolume* middleBarFwdFiberSIO2Volume = new TGeoVolume(Form("TRK_MIDBARFWD_FIBER_SIO2_%s%d", orLabel.c_str(), iSide), middleBarFwdFiberSIO2, medSiO2);
      auto* rot = new TGeoRotation("", refAngle + iSide * 180., 0, 180.);
      auto* combiTransSIO2 = new TGeoCombiTrans(0, 0, (int)orientation * (zCur + dZ), rot);
 
      zCur += 2 * dZ;
      dZ = peFiberAreaD / diskCircumference / 2.;
      totalThickness += 2 * dZ;
      if (orientation == Orientation::kASide) {
        dZ += peFiberAreaB / diskCircumference / 2.;
      }
      TGeoTubeSeg* middleBarFwdFiberPE = new TGeoTubeSeg(Form("TRK_MIDBARFWD_FIBER_PEsh_%s%d", orLabel.c_str(), iSide), rMinMiddleBarrel, rMaxMiddleServicesBarFwd, dZ, -45, 45);
      TGeoVolume* middleBarFwdFiberPEVolume = new TGeoVolume(Form("TRK_MIDBARFWD_FIBER_PE_%s%d", orLabel.c_str(), iSide), middleBarFwdFiberPE, medPE);
      middleBarFwdFiberSIO2Volume->SetLineColor(kOrange + 1);
      middleBarFwdFiberPEVolume->SetLineColor(kOrange + 1);
      auto* combiTransPE = new TGeoCombiTrans(0, 0, (int)orientation * (zCur + dZ), rot);
      motherVolume->AddNode(middleBarFwdFiberSIO2Volume, 1, combiTransSIO2);
      motherVolume->AddNode(middleBarFwdFiberPEVolume, 1, combiTransPE);
 
      // Create powerlines
      zCur += 2 * dZ;
      dZ = cuPowerAreaD / diskCircumference / 2.;
      totalThickness += 2 * dZ;
      if (orientation == Orientation::kASide) {
        dZ += cuPowerAreaB / diskCircumference / 2.;
      }
      TGeoTubeSeg* middleBarFwdPowerCu = new TGeoTubeSeg(Form("TRK_MIDBARFWD_POWER_CUsh_%s%d", orLabel.c_str(), iSide), rMinMiddleBarrel, rMaxMiddleServicesBarFwd, dZ, -45, 45);
      TGeoVolume* middleBarFwdPowerCuVolume = new TGeoVolume(Form("TRK_MIDBARFWD_POWER_CU_%s%d", orLabel.c_str(), iSide), middleBarFwdPowerCu, medCu);
      auto* combiTransCu = new TGeoCombiTrans(0, 0, (int)orientation * (zCur + dZ), rot);
 
      zCur += 2 * dZ;
      dZ = pePowerAreaD / diskCircumference / 2.;
      totalThickness += 2 * dZ;
      if (orientation == Orientation::kASide) {
        dZ += pePowerAreaB / diskCircumference / 2.;
      }
      TGeoTubeSeg* middleBarFwdPowerPE = new TGeoTubeSeg(Form("TRK_MIDBARFWD_POWER_PEsh_%s%d", orLabel.c_str(), iSide), rMinMiddleBarrel, rMaxMiddleServicesBarFwd, dZ, -45, 45);
      TGeoVolume* middleBarFwdPowerPEVolume = new TGeoVolume(Form("TRK_MIDBARFWD_POWER_PE_%s%d", orLabel.c_str(), iSide), middleBarFwdPowerPE, medPE);
      middleBarFwdPowerCuVolume->SetLineColor(kOrange + 1);
      middleBarFwdPowerPEVolume->SetLineColor(kOrange + 1);
      auto* combiTransPEPower = new TGeoCombiTrans(0, 0, (int)orientation * (zCur + dZ), rot);
      motherVolume->AddNode(middleBarFwdPowerCuVolume, 1, combiTransCu);
      motherVolume->AddNode(middleBarFwdPowerPEVolume, 1, combiTransPEPower);
 
      // TODO: add cooling ducts/pipes
    }
 
    // Forward part
    float zLengthMiddleServicesFwd = 350.f - (zMiddleServicesBarrelFwdConnection + totalThickness);
    float rMinMiddleServicesFwd = 74.5f; // 74.5cm
 
    for (int iSide = 0; iSide < 2; iSide++) {
      // Create fibers
 
      float translation = (int)orientation * (zMiddleServicesBarrelFwdConnection + totalThickness + zLengthMiddleServicesFwd / 2);
 
      double rCur = rMinMiddleServicesFwd;
      double dR = siO2FiberAreaD / (3.14 * rCur);
      if (orientation == Orientation::kASide) {
        dR += siO2FiberAreaB / (3.14 * rCur);
      }
      TGeoTubeSeg* middleFwdFiberSIO2 = new TGeoTubeSeg(Form("TRK_MIDFWD_FIBER_SIO2sh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthMiddleServicesFwd / 2, -45, 45);
      TGeoVolume* middleFwdFiberSIO2Volume = new TGeoVolume(Form("TRK_MIDFWD_FIBER_SIO2_%s%d", orLabel.c_str(), iSide), middleFwdFiberSIO2, medSiO2);
      middleFwdFiberSIO2Volume->SetLineColor(kOrange + 1);
 
      rCur += dR;
      dR = peFiberAreaD / (3.14 * rCur);
      if (orientation == Orientation::kASide) {
        dR += peFiberAreaB / (3.14 * rCur);
      }
      TGeoTubeSeg* middleFwdFiberPE = new TGeoTubeSeg(Form("TRK_MIDFWD_FIBER_PEsh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthMiddleServicesFwd / 2, -45, 45);
      TGeoVolume* middleFwdFiberPEVolume = new TGeoVolume(Form("TRK_MIDFWD_FIBER_PE_%s%d", orLabel.c_str(), iSide), middleFwdFiberPE, medPE);
      middleFwdFiberPEVolume->SetLineColor(kOrange + 1);
 
      auto* rot = new TGeoRotation("", refAngle + iSide * 180., 0, 0.);
      auto* combiTrans = new TGeoCombiTrans(0, 0, translation, rot);
      motherVolume->AddNode(middleFwdFiberSIO2Volume, 1, combiTrans);
      motherVolume->AddNode(middleFwdFiberPEVolume, 1, combiTrans);
 
      // Create powerlines
      rCur += dR;
      dR = cuPowerAreaD / (3.14 * rCur);
      if (orientation == Orientation::kASide) {
        dR += cuPowerAreaB / (3.14 * rCur);
      }
      TGeoTubeSeg* middleFwdPowerCu = new TGeoTubeSeg(Form("TRK_MIDFWD_POWER_CUsh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthMiddleServicesFwd / 2, -45, 45);
      TGeoVolume* middleFwdPowerCuVolume = new TGeoVolume(Form("TRK_MIDFWD_POWER_CU_%s%d", orLabel.c_str(), iSide), middleFwdPowerCu, medCu);
      middleFwdPowerCuVolume->SetLineColor(kOrange + 1);
 
      rCur += dR;
      dR = pePowerAreaD / (3.14 * rCur);
      if (orientation == Orientation::kASide) {
        dR += pePowerAreaB / (3.14 * rCur);
      }
      TGeoTubeSeg* middleFwdPowerPE = new TGeoTubeSeg(Form("TRK_MIDFWD_POWER_PEsh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthMiddleServicesFwd / 2, -45, 45);
      TGeoVolume* middleFwdPowerPEVolume = new TGeoVolume(Form("TRK_MIDFWD_POWER_PE_%s%d", orLabel.c_str(), iSide), middleFwdPowerPE, medPE);
      middleFwdPowerPEVolume->SetLineColor(kOrange + 1);
      motherVolume->AddNode(middleFwdPowerCuVolume, 1, combiTrans);
      motherVolume->AddNode(middleFwdPowerPEVolume, 1, combiTrans);
 
      // TODO: add cooling ducts/pipes
    }
  }
}
 
void TRKServices::createOTBarrelWalls(TGeoVolume* motherVolume)
{
  // Closes each OT quarter barrel azimuthally (a wall in the cut plane) and at mid-rapidity
  // (a half disk at z = 0); radially the two cylindrical shells already do it. Both run
  // continuously between the shells, through the slots in the layer envelopes.
  auto& matmgr = o2::base::MaterialManager::Instance();
  TGeoMedium* medCFiber = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_CARBONFIBERM55J6K");
 
  // Only the realistic OT barrel is built in quarters with slotted envelopes.
  if (TRKBaseParam::Instance().getLayoutMLOT() != kSimplifiedRealistic) {
    LOGP(info, "OT barrel separation walls skipped: they belong to the kSimplifiedRealistic OT barrel");
    return;
  }
 
  const float thickness = TRKBaseParam::Instance().otBarrelWallThickness;
  if (thickness <= 0.f) {
    LOGP(info, "OT barrel separation walls disabled (TRKBase.otBarrelWallThickness = {})", thickness);
    return;
  }
 
  const float zWallOuter = 142.0f; // cm, up to the OT barrel service disk
  const float phiCut = 90.f;       // deg, the vertical cut plane, as in TRKOTLayerRealistic::createLayer
 
  // The wall is a box, so its outer edge is pulled in until the corners, not the face,
  // sit on the outer shell.
  const float zLength = zWallOuter - thickness;
  const float rHiBox = std::sqrt(sOTShellRMin * sOTShellRMin - thickness * thickness / 4.f);
  const float rMidWall = 0.5 * (sMLOTShellRMax + rHiBox);
  LOGP(info, "Creating OT barrel separation walls, {} cm of carbon fibre, continuous over r = [{}, {}] cm", thickness, sMLOTShellRMax, rHiBox);
 
  for (auto& orientation : {Orientation::kASide, Orientation::kCSide}) {
    const std::string orLabel = (orientation == Orientation::kASide) ? "A" : "C";
    const int zSign = (int)orientation;
 
    for (int iSide = 0; iSide < 2; ++iSide) {
      const double phi = (phiCut + iSide * 180.f) * TMath::DegToRad();
      TGeoBBox* wallSh = new TGeoBBox(Form("TRK_OT_WALL_PHIsh_%s%d", orLabel.c_str(), iSide),
                                      (rHiBox - sMLOTShellRMax) / 2., thickness / 2., zLength / 2.);
      TGeoVolume* wallVol = new TGeoVolume(Form("TRK_OT_WALL_PHI_%s%d", orLabel.c_str(), iSide), wallSh, medCFiber);
      wallVol->SetLineColor(kGray);
      auto* rot = new TGeoRotation("", phiCut + iSide * 180.f, 0, 0);
      motherVolume->AddNode(wallVol, 1,
                            new TGeoCombiTrans(rMidWall * std::cos(phi), rMidWall * std::sin(phi),
                                               zSign * (thickness + zLength / 2.), rot));
    }
  }
 
  // One per azimuthal half and per eta half-barrel, back to back in the gap between them.
  for (auto& orientation : {Orientation::kASide, Orientation::kCSide}) {
    const std::string orLabel = (orientation == Orientation::kASide) ? "A" : "C";
    const int zSign = (int)orientation;
    for (int iHalf = 0; iHalf < 2; ++iHalf) {
      TGeoTubeSeg* diskSh = new TGeoTubeSeg(Form("TRK_OT_WALL_Z0sh_%s%d", orLabel.c_str(), iHalf),
                                            sMLOTShellRMax, sOTShellRMin, thickness / 2., phiCut + iHalf * 180.f, phiCut + (iHalf + 1) * 180.f);
      TGeoVolume* diskVol = new TGeoVolume(Form("TRK_OT_WALL_Z0_%s%d", orLabel.c_str(), iHalf), diskSh, medCFiber);
      diskVol->SetLineColor(kGray);
      motherVolume->AddNode(diskVol, 1, new TGeoTranslation(0, 0, zSign * thickness / 2.));
    }
  }
}
 
void TRKServices::createOTServicesPeacock(TGeoVolume* motherVolume)
{
  // This implments the service barrels for power + data for the OT barrels and disks
  // TODO: add cooling
 
  auto& matmgr = o2::base::MaterialManager::Instance();
 
  TGeoMedium* medSiO2 = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_SILICONDIOXIDE");
  TGeoMedium* medPE = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_POLYETHYLENE");
  TGeoMedium* medCu = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_COPPER");
  TGeoMedium* medPU = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_POLYURETHANE");
  TGeoMedium* medH2O = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_WATER");
  TGeoMedium* medCFiber = matmgr.getTGeoMedium("ALICE3_TRKSERVICES_CARBONFIBERM55J6K");
 
  // OT Disk service constants
  const int OTDisknFiber = 3 * 51;
  const int OTDisknPower = 3 * 34;
  float siO2FiberAreaD = OTDisknFiber * mFiberArea * mFiberComposition[0];
  float peFiberAreaD = OTDisknFiber * mFiberArea * mFiberComposition[1];
 
  float puCoolingAreaD = 0;
  float h2oCoolingAreaD = 0;
  float cuPowerAreaD = OTDisknPower * mPowerBundleArea * mPowerBundleComposition[0];
  float pePowerAreaD = OTDisknPower * mPowerBundleArea * mPowerBundleComposition[1];
 
  // OT Barrel service constants
  const int OTBarrelnFiber = 460;
  const int OTBarrelnPower = 306;
  float siO2FiberAreaB = OTBarrelnFiber * mFiberArea * mFiberComposition[0];
  float peFiberAreaB = OTBarrelnFiber * mFiberArea * mFiberComposition[1];
 
  float puCoolingAreaB = 0;
  float h2oCoolingAreaB = 0;
  float cuPowerAreaB = OTBarrelnPower * mPowerBundleArea * mPowerBundleComposition[0];
  float pePowerAreaB = OTBarrelnPower * mPowerBundleArea * mPowerBundleComposition[1];
 
  // geometry of service "disk" for OT barrel
  double rMinOTbarrelServices = 45.0; // cm, radius of first OT barrel layer
  double rMaxOTbarrelServices = 78.0; // cm, radius of last OT barrel layer
  double zOTbarrelServices = 142.0;   // cm, approximate position of OT services in z
 
  // geometry of service "tubes" for OT barrel
  float rMinOuterBarrelTubeServices = rMaxOTbarrelServices;       // cm, IA, May 11, 2026: temporary radius (?)
  float zStartOuterBarrelTubeServices = zOTbarrelServices + 0.8f; // cm, IA, May 11, 2026: start "OT service tubes" close in z to the "OT service disks"
  float zLengthOuterBarrelTubeServices = 215.f;                   // cm, IA, May 11, 2026: temporary length (?)
 
  // geometry of service "tubes" for OT disks
  float rMinOuterDiskServices = 71.f;     // cm
  float zStartOuterDiskServices = 149.f;  // cm
  float zLengthOuterDiskServices = 201.f; // cm
 
  // Carbon Fiber Cylinder support for the middle tracker
  float rMinOuterCarbonSupport = sOTShellRMin;                     // TODO: get more precise location
  float rMaxOuterCarbonSupport = sOTShellRMin + sOTShellThickness; // 4 mm of carbon fiber, the only load-bearing wall
  const float zLengthOuterCarbon = 280.0f;                         // Rough guess for now
  TGeoTube* outerBarrelCarbonSupport = new TGeoTube("TRK_OT_CARBONSUPPORTsh", rMinOuterCarbonSupport, rMaxOuterCarbonSupport, zLengthOuterCarbon / 2.);
  TGeoVolume* outerBarrelCarbonSupportVolume = new TGeoVolume("TRK_OT_CARBONSUPPORT", outerBarrelCarbonSupport, medCFiber);
  outerBarrelCarbonSupportVolume->SetLineColor(kGray);
  LOGP(info, "Creating carbon fiber support for Outer Tracker");
  motherVolume->AddNode(outerBarrelCarbonSupportVolume, 1, nullptr);
 
  for (auto& orientation : {Orientation::kASide, Orientation::kCSide}) {
    std::string orLabel = "A";
    float refAngle = 0;
    if (orientation == Orientation::kCSide) {
      orLabel = "C";
      refAngle = 90;
    }
    // TODO: add cables/connections at ends of OT barrels
    double zCur = zOTbarrelServices;
 
    double dZ = siO2FiberAreaB / (4 * 3.14 * rMaxOTbarrelServices);
    TGeoTube* outerBarrelFiberSIO2 = new TGeoTube(Form("TRK_OUTERBARREL_FIBER_SIO2sh_%s", orLabel.c_str()), rMinOTbarrelServices, rMaxOTbarrelServices, dZ);
    TGeoVolume* outerBarrelFiberSIO2Volume = new TGeoVolume(Form("TRK_OUTERBARREL_FIBER_SIO2_%s", orLabel.c_str()), outerBarrelFiberSIO2, medSiO2);
    outerBarrelFiberSIO2Volume->SetLineColor(kAzure + 6);
    auto* combiTrans = new TGeoCombiTrans(0, 0, (int)orientation * (zCur + dZ), nullptr);
    motherVolume->AddNode(outerBarrelFiberSIO2Volume, 1, combiTrans);
 
    zCur += 2 * dZ;
    dZ = peFiberAreaB / (4 * 3.14 * rMaxOTbarrelServices);
    TGeoTube* outerBarrelFiberPE = new TGeoTube(Form("TRK_OUTERBARREL_FIBER_PEsh_%s", orLabel.c_str()), rMinOTbarrelServices, rMaxOTbarrelServices, dZ);
    TGeoVolume* outerBarrelFiberPEVolume = new TGeoVolume(Form("TRK_OUTERBARREL_FIBER_PE_%s", orLabel.c_str()), outerBarrelFiberPE, medPE);
    outerBarrelFiberPEVolume->SetLineColor(kAzure + 6);
    combiTrans = new TGeoCombiTrans(0, 0, (int)orientation * (zCur + dZ), nullptr);
    motherVolume->AddNode(outerBarrelFiberPEVolume, 1, combiTrans);
 
    zCur += 2 * dZ;
    dZ = cuPowerAreaB / (4 * 3.14 * rMaxOTbarrelServices);
    TGeoTube* outerBarrelPowerCu = new TGeoTube(Form("TRK_OUTERBARREL_POWER_CUsh_%s", orLabel.c_str()), rMinOTbarrelServices, rMaxOTbarrelServices, dZ);
    TGeoVolume* outerBarrelPowerCuVolume = new TGeoVolume(Form("TRK_OUTERBARREL_POWER_CU_%s", orLabel.c_str()), outerBarrelPowerCu, medCu);
    outerBarrelPowerCuVolume->SetLineColor(kAzure + 6);
    combiTrans = new TGeoCombiTrans(0, 0, (int)orientation * (zCur + dZ), nullptr);
    motherVolume->AddNode(outerBarrelPowerCuVolume, 1, combiTrans);
 
    zCur += 2 * dZ;
    dZ = pePowerAreaB / (4 * 3.14 * rMaxOTbarrelServices);
    TGeoTube* outerBarrelPowerPE = new TGeoTube(Form("TRK_OUTERBARREL_POWER_PEsh_%s", orLabel.c_str()), rMinOTbarrelServices, rMaxOTbarrelServices, dZ);
    TGeoVolume* outerBarrelPowerPEVolume = new TGeoVolume(Form("TRK_OUTERBARREL_POWER_PE_%s", orLabel.c_str()), outerBarrelPowerPE, medPE);
    outerBarrelPowerPEVolume->SetLineColor(kAzure + 6);
    combiTrans = new TGeoCombiTrans(0, 0, (int)orientation * (zCur + dZ), nullptr);
    motherVolume->AddNode(outerBarrelPowerPEVolume, 1, combiTrans);
 
    for (int iSide = 0; iSide < 2; iSide++) {
      // #### OT barrel services, implemented as tubes
      // Create fibers for service barrel tubes
      double rCur = rMinOuterBarrelTubeServices; // set starting radius for barrel service tube
      double dR = siO2FiberAreaB / (3.14 * rCur);
      TGeoTubeSeg* outerBarrelTubeFiberSIO2 = new TGeoTubeSeg(Form("TRK_OUTERBARREL_TUBE_FIBER_SIO2sh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthOuterBarrelTubeServices / 2, -45, 45);
      TGeoVolume* outerBarrelTubeFiberSIO2Volume = new TGeoVolume(Form("TRK_OUTERBARREL_TUBE_FIBER_SIO2_%s%d", orLabel.c_str(), iSide), outerBarrelTubeFiberSIO2, medSiO2);
      outerBarrelTubeFiberSIO2Volume->SetLineColor(kAzure + 6);
 
      rCur += dR;
      dR = peFiberAreaB / (3.14 * rCur);
      TGeoTubeSeg* outerBarrelTubeFiberPE = new TGeoTubeSeg(Form("TRK_OUTERBARREL_TUBE_FIBER_PEsh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthOuterBarrelTubeServices / 2, -45, 45);
      TGeoVolume* outerBarrelTubeFiberPEVolume = new TGeoVolume(Form("TRK_OUTERBARREL_TUBE_FIBER_PE_%s%d", orLabel.c_str(), iSide), outerBarrelTubeFiberPE, medPE);
      outerBarrelTubeFiberPEVolume->SetLineColor(kAzure + 6);
 
      float translation = (int)orientation * (zStartOuterBarrelTubeServices + zLengthOuterBarrelTubeServices / 2);
      auto* combiTrans = new TGeoCombiTrans(0, 0, translation, new TGeoRotation("", refAngle + iSide * 180., 0, 0));
      motherVolume->AddNode(outerBarrelTubeFiberSIO2Volume, 1, combiTrans);
      motherVolume->AddNode(outerBarrelTubeFiberPEVolume, 1, combiTrans);
 
      // Create power lines for service barrel tubes
      rCur += dR;
      dR = cuPowerAreaB / (3.14 * rCur);
      TGeoTubeSeg* outerBarrelTubePowerCu = new TGeoTubeSeg(Form("TRK_OUTERBARREL_TUBE_POWER_CUsh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthOuterBarrelTubeServices / 2, -45, 45);
      TGeoVolume* outerBarrelTubePowerCuVolume = new TGeoVolume(Form("TRK_OUTERBARREL_TUBE_POWER_CU_%s%d", orLabel.c_str(), iSide), outerBarrelTubePowerCu, medCu);
      outerBarrelTubePowerCuVolume->SetLineColor(kAzure + 6);
 
      rCur += dR;
      dR = pePowerAreaB / (3.14 * rCur);
      TGeoTubeSeg* outerBarrelTubePowerPE = new TGeoTubeSeg(Form("TRK_OUTERBARREL_TUBE_POWER_PEsh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthOuterBarrelTubeServices / 2, -45, 45);
      TGeoVolume* outerBarrelTubePowerPEVolume = new TGeoVolume(Form("TRK_OUTERBARREL_TUBE_POWER_PE_%s%d", orLabel.c_str(), iSide), outerBarrelTubePowerPE, medPE);
      outerBarrelTubePowerPEVolume->SetLineColor(kAzure + 6);
      motherVolume->AddNode(outerBarrelTubePowerCuVolume, 1, combiTrans);
      motherVolume->AddNode(outerBarrelTubePowerPEVolume, 1, combiTrans);
 
      // #### OT disk services, implemented as tubes
      // Create fibers for disks
      rCur = rMinOuterDiskServices; // set starting radius for disk service tube
      dR = siO2FiberAreaD / (3.14 * rCur);
      TGeoTubeSeg* outerDisksFiberSIO2 = new TGeoTubeSeg(Form("TRK_OUTERDISKS_FIBER_SIO2sh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthOuterDiskServices / 2, -45, 45);
      TGeoVolume* outerDisksFiberSIO2Volume = new TGeoVolume(Form("TRK_OUTERDISKS_FIBER_SIO2_%s%d", orLabel.c_str(), iSide), outerDisksFiberSIO2, medSiO2);
      outerDisksFiberSIO2Volume->SetLineColor(kMagenta);
 
      rCur += dR;
      dR = peFiberAreaD / (3.14 * rCur);
      TGeoTubeSeg* outerDisksFiberPE = new TGeoTubeSeg(Form("TRK_OUTERDISKS_FIBER_PEsh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthOuterDiskServices / 2, -45, 45);
      TGeoVolume* outerDisksFiberPEVolume = new TGeoVolume(Form("TRK_OUTERDISKS_FIBER_PE_%s%d", orLabel.c_str(), iSide), outerDisksFiberPE, medPE);
      outerDisksFiberPEVolume->SetLineColor(kMagenta);
 
      translation = (int)orientation * (zStartOuterDiskServices + zLengthOuterDiskServices / 2);
      combiTrans = new TGeoCombiTrans(0, 0, translation, new TGeoRotation("", refAngle + iSide * 180., 0, 0));
      motherVolume->AddNode(outerDisksFiberSIO2Volume, 1, combiTrans);
      motherVolume->AddNode(outerDisksFiberPEVolume, 1, combiTrans);
 
      // Create power lines for disks
      rCur += dR;
      dR = cuPowerAreaD / (3.14 * rCur);
      TGeoTubeSeg* outerDisksPowerCu = new TGeoTubeSeg(Form("TRK_OUTERDISKS_POWER_CUsh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthOuterDiskServices / 2, -45, 45);
      TGeoVolume* outerDisksPowerCuVolume = new TGeoVolume(Form("TRK_OUTERDISKS_POWER_CU_%s%d", orLabel.c_str(), iSide), outerDisksPowerCu, medCu);
      outerDisksPowerCuVolume->SetLineColor(kMagenta + 1);
 
      rCur += dR;
      dR = pePowerAreaD / (3.14 * rCur);
      TGeoTubeSeg* outerDisksPowerPE = new TGeoTubeSeg(Form("TRK_OUTERDISKS_POWER_PEsh_%s%d", orLabel.c_str(), iSide), rCur, rCur + dR, zLengthOuterDiskServices / 2, -45, 45);
      TGeoVolume* outerDisksPowerPEVolume = new TGeoVolume(Form("TRK_OUTERDISKS_POWER_PE_%s%d", orLabel.c_str(), iSide), outerDisksPowerPE, medPE);
      outerDisksPowerPEVolume->SetLineColor(kMagenta + 1);
      motherVolume->AddNode(outerDisksPowerCuVolume, 1, combiTrans);
      motherVolume->AddNode(outerDisksPowerPEVolume, 1, combiTrans);
 
      // TODO: add cooling ducts/pipes
    }
  }
}
 
} // namespace trk
} // namespace o2