[807] | 1 | // |
---|
| 2 | // ******************************************************************** |
---|
| 3 | // * License and Disclaimer * |
---|
| 4 | // * * |
---|
| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
| 7 | // * conditions of the Geant4 Software License, included in the file * |
---|
| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
| 9 | // * include a list of copyright holders. * |
---|
| 10 | // * * |
---|
| 11 | // * Neither the authors of this software system, nor their employing * |
---|
| 12 | // * institutes,nor the agencies providing financial support for this * |
---|
| 13 | // * work make any representation or warranty, express or implied, * |
---|
| 14 | // * regarding this software system or assume any liability for its * |
---|
| 15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
| 16 | // * for the full disclaimer and the limitation of liability. * |
---|
| 17 | // * * |
---|
| 18 | // * This code implementation is the result of the scientific and * |
---|
| 19 | // * technical work of the GEANT4 collaboration. * |
---|
| 20 | // * By using, copying, modifying or distributing the software (or * |
---|
| 21 | // * any work based on the software) you agree to acknowledge its * |
---|
| 22 | // * use in resulting scientific publications, and indicate your * |
---|
| 23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
| 24 | // ******************************************************************** |
---|
| 25 | // |
---|
| 26 | |
---|
| 27 | //--------------------------------------------------------------------------- |
---|
| 28 | // |
---|
| 29 | // ClassName: PrimaryGeneratorAction |
---|
| 30 | // |
---|
| 31 | // Description: Generate primary beam |
---|
| 32 | // |
---|
| 33 | // Authors: V.Grichine, V.Ivanchenko |
---|
| 34 | // |
---|
| 35 | // Modified: |
---|
| 36 | // |
---|
| 37 | //---------------------------------------------------------------------------- |
---|
| 38 | // |
---|
| 39 | |
---|
| 40 | #include "PrimaryGeneratorAction.hh" |
---|
| 41 | #include "DetectorConstruction.hh" |
---|
| 42 | #include "PrimaryGeneratorMessenger.hh" |
---|
| 43 | #include "Randomize.hh" |
---|
| 44 | #include "G4ParticleGun.hh" |
---|
| 45 | #include "G4ParticleTable.hh" |
---|
| 46 | #include "G4ParticleDefinition.hh" |
---|
| 47 | #include "Histo.hh" |
---|
| 48 | |
---|
| 49 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 50 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 51 | |
---|
| 52 | PrimaryGeneratorAction::PrimaryGeneratorAction(DetectorConstruction* pDet): |
---|
| 53 | fDetector(pDet) |
---|
| 54 | { |
---|
| 55 | InitializeMe(); |
---|
| 56 | } |
---|
| 57 | |
---|
| 58 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 59 | |
---|
| 60 | void PrimaryGeneratorAction::InitializeMe() |
---|
| 61 | { |
---|
| 62 | theMessenger = new PrimaryGeneratorMessenger(this); |
---|
| 63 | particleGun = new G4ParticleGun(); |
---|
| 64 | counter = 0; |
---|
| 65 | verbose = 0; |
---|
| 66 | x0 = 0.0; |
---|
| 67 | y0 = 0.0; |
---|
| 68 | z0 = 0.0; |
---|
| 69 | sigmaX = 1.5*mm; |
---|
| 70 | sigmaY = 1.5*mm; |
---|
| 71 | sigmaZ = 0.0; |
---|
| 72 | sigmaE = 0.0; |
---|
| 73 | rMax2 = 2.5*2.5*mm*mm; |
---|
| 74 | sigmaTheta = 0.0; |
---|
| 75 | // sigmaTheta = 0.17*degree; |
---|
| 76 | minCosTheta = 2.0; |
---|
| 77 | SetBeamEnergy(50.0*MeV); |
---|
| 78 | position = G4ThreeVector(x0,y0,z0); |
---|
| 79 | direction = G4ThreeVector(0.0,0.0,1.0); |
---|
| 80 | m_gauss = true; |
---|
| 81 | if(energy < (Histo::GetPointer())->GetMaxEnergy()) |
---|
| 82 | (Histo::GetPointer())->SetMaxEnergy(energy); |
---|
| 83 | } |
---|
| 84 | |
---|
| 85 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 86 | |
---|
| 87 | PrimaryGeneratorAction::~PrimaryGeneratorAction() |
---|
| 88 | { |
---|
| 89 | delete particleGun; |
---|
| 90 | delete theMessenger; |
---|
| 91 | } |
---|
| 92 | |
---|
| 93 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 94 | |
---|
| 95 | void PrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent) |
---|
| 96 | { |
---|
| 97 | counter++ ; |
---|
| 98 | verbose = (Histo::GetPointer())->GetVerbose(); |
---|
| 99 | |
---|
| 100 | // Simulation of beam position |
---|
| 101 | G4double x = x0; |
---|
| 102 | G4double y = y0; |
---|
| 103 | G4double z = fDetector->GetGeneratorPosZ(); |
---|
| 104 | do { |
---|
| 105 | if(0.0 < sigmaX) x = G4RandGauss::shoot(x0,sigmaX); |
---|
| 106 | if(0.0 < sigmaY) y = G4RandGauss::shoot(y0,sigmaY); |
---|
| 107 | } while (x*x + y*y > rMax2); |
---|
| 108 | |
---|
| 109 | position = G4ThreeVector(x,y,z); |
---|
| 110 | particleGun->SetParticlePosition(position); |
---|
| 111 | |
---|
| 112 | // Simulation of beam direction |
---|
| 113 | G4double ux = direction.x(); |
---|
| 114 | G4double uy = direction.y(); |
---|
| 115 | G4double uz = direction.z(); |
---|
| 116 | |
---|
| 117 | // Beam particles are uniformly distributed over phi, cosTheta |
---|
| 118 | if(1.0 > minCosTheta) { |
---|
| 119 | uz = minCosTheta + (1.0 - minCosTheta)*G4UniformRand() ; |
---|
| 120 | ux = std::sqrt(1.0 - uz*uz) ; |
---|
| 121 | } else if (sigmaTheta > 0.0) { |
---|
| 122 | ux = G4RandGauss::shoot(0.0,sigmaTheta); |
---|
| 123 | uz = std::sqrt(1.0 - ux*ux); |
---|
| 124 | } |
---|
| 125 | |
---|
| 126 | G4double phi = twopi*G4UniformRand() ; |
---|
| 127 | uy = ux ; |
---|
| 128 | ux *= std::cos(phi) ; |
---|
| 129 | uy *= std::sin(phi) ; |
---|
| 130 | direction = G4ThreeVector(ux,uy,uz) ; |
---|
| 131 | |
---|
| 132 | direction = direction.unit(); |
---|
| 133 | particleGun->SetParticleMomentumDirection(direction); |
---|
| 134 | G4ParticleDefinition* particle = particleGun->GetParticleDefinition(); |
---|
| 135 | |
---|
| 136 | // Simulation of beam kinetic energy |
---|
| 137 | G4double kinEnergy = energy; |
---|
| 138 | |
---|
| 139 | if(m_gauss == "flatE") kinEnergy = energy - sigmaE + 2.*sigmaE*G4UniformRand(); |
---|
| 140 | else if(0.0 < sigmaE) kinEnergy = energy + G4RandGauss::shoot(0.0,sigmaE); |
---|
| 141 | |
---|
| 142 | particleGun->SetParticleEnergy(kinEnergy); |
---|
| 143 | |
---|
| 144 | G4String particleName = particle->GetParticleName() ; |
---|
| 145 | |
---|
| 146 | if(verbose > 0) { |
---|
| 147 | G4cout << "Event# " << counter |
---|
| 148 | << " Beam particle is generated by PrimaryGeneratorAction " |
---|
| 149 | << G4endl; |
---|
| 150 | G4cout << "ParticleName= " << particleName |
---|
| 151 | << " PDGcode= " << particle->GetPDGEncoding() |
---|
| 152 | << std::setprecision(5) |
---|
| 153 | << " KinEnergy(GeV)= " |
---|
| 154 | << energy/GeV |
---|
| 155 | << " x(mm)= " |
---|
| 156 | << x/mm |
---|
| 157 | << " y(mm)= " |
---|
| 158 | << y/mm |
---|
| 159 | << " z(mm)= " |
---|
| 160 | << z/mm |
---|
| 161 | << " ux= " |
---|
| 162 | << ux |
---|
| 163 | << " uy= " |
---|
| 164 | << uy |
---|
| 165 | << " uz= " |
---|
| 166 | << uz |
---|
| 167 | << G4endl; |
---|
| 168 | } |
---|
| 169 | |
---|
| 170 | particleGun->GeneratePrimaryVertex(anEvent); |
---|
| 171 | } |
---|
| 172 | |
---|
| 173 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 174 | |
---|
| 175 | void PrimaryGeneratorAction::SetBeamSigmaE(G4double val) |
---|
| 176 | { |
---|
| 177 | sigmaE = val; |
---|
| 178 | } |
---|
| 179 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 180 | |
---|
| 181 | void PrimaryGeneratorAction::SetBeamEnergy(G4double val) |
---|
| 182 | { |
---|
| 183 | energy = val; |
---|
| 184 | if(energy < (Histo::GetPointer())->GetMaxEnergy()) |
---|
| 185 | (Histo::GetPointer())->SetMaxEnergy(energy); |
---|
| 186 | } |
---|
| 187 | |
---|
| 188 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... |
---|
| 189 | |
---|
| 190 | |
---|
| 191 | |
---|