microyz/src/TrackerSD.cc

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0025 //
0026 /// \file TrackerSD.cc
0027 /// \brief Implementation of the TrackerSD class
0028
0029 // This example is provided by the Geant4-DNA collaboration
0030 // Any report or published results obtained using the Geant4-DNA software
0031 // shall cite the following Geant4-DNA collaboration publications:
0032 // Med. Phys. 45 (2018) e722-e739
0033 // Phys. Med. 31 (2015) 861-874
0034 // Med. Phys. 37 (2010) 4692-4708
0035 // Int. J. Model. Simul. Sci. Comput. 1 (2010) 157–178
0036 // The Geant4-DNA web site is available at http://geant4-dna.org
0037 //
0038
0039 #include "TrackerSD.hh"
0040
0041 #include "G4AnalysisManager.hh"
0042 #include "G4SDManager.hh"
0043 #include "G4SystemOfUnits.hh"
0044 #include "Randomize.hh"
0045
0046 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0047
0048 TrackerSD::TrackerSD(const G4String& name, const G4String& hitsCollectionName)
0049   : G4VSensitiveDetector(name), fHitsCollection(nullptr)
0050 {
0051   collectionName.insert(hitsCollectionName);
0052 }
0053
0054 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0055
0056 TrackerSD::~TrackerSD() = default;
0057
0058 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0059
0060 void TrackerSD::Initialize(G4HCofThisEvent* hce)
0061 {
0062   // Create hits collection
0063   fHitsCollection = new TrackerHitsCollection(SensitiveDetectorName, collectionName[0]);
0064
0065   // Add this collection in hce
0066   G4int hcID = G4SDManager::GetSDMpointer()->GetCollectionID(collectionName[0]);
0067
0068   hce->AddHitsCollection(hcID, fHitsCollection);
0069 }
0070
0071 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0072
0073 G4bool TrackerSD::ProcessHits(G4Step* aStep, G4TouchableHistory*)
0074 {
0075   // Energy deposit
0076   G4double edep = aStep->GetTotalEnergyDeposit();
0077
0078   if (edep == 0.) return false;
0079
0080   auto newHit = new TrackerHit();
0081
0082   newHit->SetTrackID(aStep->GetTrack()->GetTrackID());
0083   newHit->SetEdep(edep);
0084   newHit->SetPos(aStep->GetPostStepPoint()->GetPosition());
0085
0086   if (aStep->GetTrack()->GetTrackID() == 1 && aStep->GetTrack()->GetParentID() == 0) {
0087     newHit->SetIncidentEnergy(aStep->GetTrack()->GetVertexKineticEnergy());
0088   }
0089   fHitsCollection->insert(newHit);
0090   // newHit->Print();
0091
0092   return true;
0093 }
0094
0095 void TrackerSD::SetRadius(const G4double& value)
0096 {
0097   fRadius = value;
0098 }
0099
0100 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
0101
0102 void TrackerSD::EndOfEvent(G4HCofThisEvent*)
0103 {
0104   G4int nofHits = fHitsCollection->entries();
0105
0106   G4double Einc = 0;
0107
0108   /*
0109   G4cout << G4endl
0110   << "-------->Hits Collection: in this event they are "
0111   << nofHits
0112   << " hits in the target volume " << G4endl;
0113   */
0114
0115   // PROCESSING OF MICRODOSIMETRY Y & Z SPECTRA
0116
0117   // *************************************
0118   // Please select herebelow :
0119   // the radius of the target sphere:
0120   // variable name = radius
0121   // it is set to 5 nm by default)
0122
0123   G4double radius = fRadius;
0124
0125   //
0126
0127   //***************
0128   // y and z
0129   //***************
0130
0131   // Select random hit
0132   G4int randHit = 0;  // Runs from 0 to number of hits - 1
0133   randHit = static_cast<G4int>(G4UniformRand() * nofHits);
0134
0135   /*
0136   G4cout
0137   << "======> random selection of hit number randHit ="
0138   << randHit << G4endl;
0139   */
0140
0141   // Get selected random hit position
0142   G4ThreeVector hitPos = (*fHitsCollection)[randHit]->GetPos();
0143   // G4cout << "======> random hit position x/nm =" << hitPos.x()/nm << G4endl;
0144   // G4cout << "======> random hit position y/nm =" << hitPos.y()/nm << G4endl;
0145   // G4cout << "======> random hit position z/nm =" << hitPos.z()/nm << G4endl;
0146
0147   // Set random position of center of sphere within radius
0148   G4double chord = 4. * radius / 3;
0149   G4double density = 1 * g / cm3;
0150   G4double mass = (4. / 3) * CLHEP::pi * radius * radius * radius * density;
0151
0152   // Random placement of sphere: method 1
0153   /*
0154   G4ThreeVector randDir = G4RandomDirection();
0155   G4double randRadius = G4UniformRand()*radius;
0156   G4ThreeVector randCenterPos = randRadius*randDir + hitPos;
0157   */
0158
0159   // Random placement of sphere: method 2
0160
0161   G4double xRand = 1.01 * radius;
0162   G4double yRand = 1.01 * radius;
0163   G4double zRand = 1.01 * radius;
0164   G4double randRad = 1.01 * radius;
0165   do {
0166     xRand = (2 * G4UniformRand() - 1) * radius;
0167     yRand = (2 * G4UniformRand() - 1) * radius;
0168     zRand = (2 * G4UniformRand() - 1) * radius;
0169     randRad = std::sqrt(xRand * xRand + yRand * yRand + zRand * zRand);
0170   } while (randRad > radius);
0171
0172   G4ThreeVector randCenterPos(xRand + hitPos.x(), yRand + hitPos.y(), zRand + hitPos.z());
0173
0174   // Search for neighbouring hits in the sphere and cumulate deposited energy
0175   //  in epsilon
0176   G4double epsilon = 0;
0177   G4int nbEdep = 0;
0178
0179   for (G4int i = 0; i < nofHits; i++) {
0180     if ((*fHitsCollection)[i]->GetIncidentEnergy() > 0)
0181       Einc = (*fHitsCollection)[i]->GetIncidentEnergy();
0182
0183     G4ThreeVector localPos = (*fHitsCollection)[i]->GetPos();
0184
0185     // G4cout << i << " " << (*fHitsCollection)[i] << G4endl;
0186     // G4cout << i << " " << (*fHitsCollection)[i]->GetEdep()/eV << G4endl;
0187
0188     if ((localPos.x() - randCenterPos.x()) * (localPos.x() - randCenterPos.x())
0189           + (localPos.y() - randCenterPos.y()) * (localPos.y() - randCenterPos.y())
0190           + (localPos.z() - randCenterPos.z()) * (localPos.z() - randCenterPos.z())
0191         <= radius * radius)
0192
0193     {
0194       epsilon = epsilon + (*fHitsCollection)[i]->GetEdep();
0195       nbEdep = nbEdep + 1;
0196     }
0197   }
0198
0199   // For testing only
0200   /*
0201   G4cout << "======> for hit number #" << randHit <<
0202   ", we collect "
0203   << nbEdep << " energy depositions in a sphere of radius "
0204   << radius/nm << " nm and mass "
0205   << mass/kg << " kg for a total of "
0206   << epsilon/eV << " eV or "
0207   << (epsilon/joule)/(mass/kg) << " Gy" << G4endl;
0208   G4cout << "-" << G4endl;
0209   */
0210
0211   /*
0212   FILE* myFile;
0213   myFile=fopen("yz.txt","a");
0214   fprintf(myFile,"%e %e %e\n",radius/nm,(epsilon/eV)/(chord/nm),
0215    (epsilon/joule)/(mass/kg));
0216   fclose(myFile);
0217   */
0218
0219   // Get analysis manager
0220   G4AnalysisManager* analysisManager = G4AnalysisManager::Instance();
0221
0222   // Fill ntuple including weighting
0223   analysisManager->FillNtupleDColumn(0, radius / nm);
0224   analysisManager->FillNtupleDColumn(2, nofHits);
0225   analysisManager->FillNtupleDColumn(3, nbEdep);
0226   analysisManager->FillNtupleDColumn(4, (epsilon / eV) / (chord / nm));
0227   analysisManager->FillNtupleDColumn(5, (epsilon / mass) / gray);
0228   analysisManager->FillNtupleDColumn(6, Einc / eV);
0229   analysisManager->AddNtupleRow();
0230 }
0231
0232 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......