Import Geant4 11.0.0 source tree

2021-12-10 14:46:44 +01:00
parent 6399a014b6
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+//
+// ********************************************************************
+// * License and Disclaimer                                           *
+// *                                                                  *
+// * The  Geant4 software  is  copyright of the Copyright Holders  of *
+// * the Geant4 Collaboration.  It is provided  under  the terms  and *
+// * conditions of the Geant4 Software License,  included in the file *
+// * LICENSE and available at  http://cern.ch/geant4/license .  These *
+// * include a list of copyright holders.                             *
+// *                                                                  *
+// * Neither the authors of this software system, nor their employing *
+// * institutes,nor the agencies providing financial support for this *
+// * work  make  any representation or  warranty, express or implied, *
+// * regarding  this  software system or assume any liability for its *
+// * use.  Please see the license in the file  LICENSE  and URL above *
+// * for the full disclaimer and the limitation of liability.         *
+// *                                                                  *
+// * This  code  implementation is the result of  the  scientific and *
+// * technical work of the GEANT4 collaboration.                      *
+// * By using,  copying,  modifying or  distributing the software (or *
+// * any work based  on the software)  you  agree  to acknowledge its *
+// * use  in  resulting  scientific  publications,  and indicate your *
+// * acceptance of all terms of the Geant4 Software license.          *
+// ********************************************************************
+//
+//
+/// \file PrimaryGeneratorAction.cc
+/// \brief Implementation of the B5::PrimaryGeneratorAction class
+
+#include "PrimaryGeneratorAction.hh"
+
+#include "G4Event.hh"
+#include "G4ParticleGun.hh"
+#include "G4ParticleTable.hh"
+#include "G4ParticleDefinition.hh"
+#include "G4GenericMessenger.hh"
+#include "G4SystemOfUnits.hh"
+#include "Randomize.hh"
+
+namespace B5
+{
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
+
+PrimaryGeneratorAction::PrimaryGeneratorAction()
+// : G4VUserPrimaryGeneratorAction(),
+//   fParticleGun(nullptr), fMessenger(nullptr),
+//   fPositron(nullptr), fMuon(nullptr), fPion(nullptr),
+//   fKaon(nullptr), fProton(nullptr),
+//   fMomentum(1000.*MeV),
+//   fSigmaMomentum(50.*MeV),
+//   fSigmaAngle(2.*deg),
+//   fRandomizePrimary(true)
+{
+  G4int nofParticles = 1;
+  fParticleGun  = new G4ParticleGun(nofParticles);
+
+  auto particleTable = G4ParticleTable::GetParticleTable();
+  fPositron = particleTable->FindParticle("e+");
+  fMuon = particleTable->FindParticle("mu+");
+  fPion = particleTable->FindParticle("pi+");
+  fKaon = particleTable->FindParticle("kaon+");
+  fProton = particleTable->FindParticle("proton");
+
+  // default particle kinematics
+  fParticleGun->SetParticlePosition(G4ThreeVector(0.,0.,-8.*m));
+  fParticleGun->SetParticleDefinition(fPositron);
+
+  // define commands for this class
+  DefineCommands();
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
+
+PrimaryGeneratorAction::~PrimaryGeneratorAction()
+{
+  delete fParticleGun;
+  delete fMessenger;
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
+
+void PrimaryGeneratorAction::GeneratePrimaries(G4Event* event)
+{
+  G4ParticleDefinition* particle;
+  if (fRandomizePrimary) {
+    G4int i = (int)(5.*G4UniformRand());
+    switch(i) {
+      case 0:
+          particle = fPositron;
+          break;
+      case 1:
+          particle = fMuon;
+          break;
+      case 2:
+          particle = fPion;
+          break;
+      case 3:
+          particle = fKaon;
+          break;
+      default:
+          particle = fProton;
+          break;
+    }
+    fParticleGun->SetParticleDefinition(particle);
+  }
+  else {
+    particle = fParticleGun->GetParticleDefinition();
+  }
+
+  auto pp = fMomentum + (G4UniformRand()-0.5)*fSigmaMomentum;
+  auto mass = particle->GetPDGMass();
+  auto ekin = std::sqrt(pp*pp+mass*mass)-mass;
+  fParticleGun->SetParticleEnergy(ekin);
+
+  auto angle = (G4UniformRand()-0.5)*fSigmaAngle;
+  fParticleGun->SetParticleMomentumDirection(
+                  G4ThreeVector(std::sin(angle),0.,std::cos(angle)));
+
+  fParticleGun->GeneratePrimaryVertex(event);
+}
+
+//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
+
+void PrimaryGeneratorAction::DefineCommands()
+{
+  // Define /B5/generator command directory using generic messenger class
+  fMessenger
+    = new G4GenericMessenger(this,
+                             "/B5/generator/",
+                             "Primary generator control");
+
+  // momentum command
+  auto& momentumCmd
+    = fMessenger->DeclarePropertyWithUnit("momentum", "GeV", fMomentum,
+        "Mean momentum of primaries.");
+  momentumCmd.SetParameterName("p", true);
+  momentumCmd.SetRange("p>=0.");
+  momentumCmd.SetDefaultValue("1.");
+  // ok
+  //momentumCmd.SetParameterName("p", true);
+  //momentumCmd.SetRange("p>=0.");
+
+  // sigmaMomentum command
+  auto& sigmaMomentumCmd
+    = fMessenger->DeclarePropertyWithUnit("sigmaMomentum",
+        "MeV", fSigmaMomentum, "Sigma momentum of primaries.");
+  sigmaMomentumCmd.SetParameterName("sp", true);
+  sigmaMomentumCmd.SetRange("sp>=0.");
+  sigmaMomentumCmd.SetDefaultValue("50.");
+
+  // sigmaAngle command
+  auto& sigmaAngleCmd
+    = fMessenger->DeclarePropertyWithUnit("sigmaAngle", "deg", fSigmaAngle,
+        "Sigma angle divergence of primaries.");
+  sigmaAngleCmd.SetParameterName("t", true);
+  sigmaAngleCmd.SetRange("t>=0.");
+  sigmaAngleCmd.SetDefaultValue("2.");
+
+  // randomizePrimary command
+  auto& randomCmd
+    = fMessenger->DeclareProperty("randomizePrimary", fRandomizePrimary);
+  G4String guidance
+    = "Boolean flag for randomizing primary particle types.\n";
+  guidance
+    += "In case this flag is false, you can select the primary particle\n";
+  guidance += "  with /gun/particle command.";
+  randomCmd.SetGuidance(guidance);
+  randomCmd.SetParameterName("flg", true);
+  randomCmd.SetDefaultValue("true");
+}
+
+//..oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
+
+}