| 1 | //
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| 2 | // ********************************************************************
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| 3 | // * License and Disclaimer *
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| 4 | // * *
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of *
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and *
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| 7 | // * conditions of the Geant4 Software License, included in the file *
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These *
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| 9 | // * include a list of copyright holders. *
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| 10 | // * *
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| 11 | // * Neither the authors of this software system, nor their employing *
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| 12 | // * institutes,nor the agencies providing financial support for this *
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| 13 | // * work make any representation or warranty, express or implied, *
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| 14 | // * regarding this software system or assume any liability for its *
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| 15 | // * use. Please see the license in the file LICENSE and URL above *
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| 16 | // * for the full disclaimer and the limitation of liability. *
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| 17 | // * *
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| 18 | // * This code implementation is the result of the scientific and *
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| 19 | // * technical work of the GEANT4 collaboration. *
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| 20 | // * By using, copying, modifying or distributing the software (or *
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| 21 | // * any work based on the software) you agree to acknowledge its *
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| 22 | // * use in resulting scientific publications, and indicate your *
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| 23 | // * acceptance of all terms of the Geant4 Software license. *
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| 24 | // ********************************************************************
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| 25 | //
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| 26 | // $Id: SteppingAction.cc,v 1.9 2006/06/29 16:57:23 gunter Exp $
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| 27 | // GEANT4 tag $Name: $
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| 28 | //
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| 29 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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| 30 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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| 31 |
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| 32 | #include "SteppingAction.hh"
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| 33 | #include "RunAction.hh"
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| 34 | #include "G4SteppingManager.hh"
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| 35 | #include "G4VProcess.hh"
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| 36 | #include "G4ParticleTypes.hh"
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| 37 |
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| 38 | #ifdef G4ANALYSIS_USE
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| 39 | #include "AIDA/IHistogram1D.h"
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| 40 | #endif
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| 41 |
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| 42 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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| 43 |
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| 44 | SteppingAction::SteppingAction(RunAction* RuAct)
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| 45 | :runAction(RuAct)
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| 46 | {
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| 47 | muonMass = G4MuonPlus::MuonPlus()->GetPDGMass();
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| 48 | }
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| 49 |
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| 50 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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| 51 |
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| 52 | SteppingAction::~SteppingAction()
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| 53 | { }
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| 54 |
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| 55 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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| 56 |
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| 57 | void SteppingAction::UserSteppingAction(const G4Step* aStep)
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| 58 | {
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| 59 | const G4VProcess* process = aStep->GetPostStepPoint()->GetProcessDefinedStep();
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| 60 | if (process == 0) return;
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| 61 | G4String processName = process->GetProcessName();
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| 62 | if (processName != "GammaToMuPair") return;
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| 63 |
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| 64 | #ifdef G4ANALYSIS_USE
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| 65 | G4StepPoint* PrePoint = aStep->GetPreStepPoint();
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| 66 | G4double EGamma = PrePoint->GetTotalEnergy();
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| 67 | G4ThreeVector PGamma = PrePoint->GetMomentum();
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| 68 |
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| 69 | G4double Eplus(0), Eminus(0);
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| 70 | G4ThreeVector Pplus , Pminus;
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| 71 | G4TrackVector* secondary = fpSteppingManager->GetSecondary();
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| 72 | for (size_t lp=0; lp<(*secondary).size(); lp++) {
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| 73 | if ((*secondary)[lp]->GetDefinition()==G4MuonPlus::MuonPlusDefinition()) {
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| 74 | Eplus = (*secondary)[lp]->GetTotalEnergy();
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| 75 | Pplus = (*secondary)[lp]->GetMomentum();
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| 76 | } else {
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| 77 | Eminus = (*secondary)[lp]->GetTotalEnergy();
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| 78 | Pminus = (*secondary)[lp]->GetMomentum();
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| 79 | }
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| 80 | }
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| 81 |
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| 82 | G4double xPlus = Eplus/EGamma, xMinus = Eminus/EGamma;
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| 83 | G4double thetaPlus = PGamma.angle(Pplus), thetaMinus = PGamma.angle(Pminus);
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| 84 | G4double GammaPlus=EGamma*xPlus/muonMass;
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| 85 | G4double GammaMinus=EGamma*xMinus/muonMass;
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| 86 |
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| 87 | runAction->GetHisto(0)->fill(1./(1.+std::pow(thetaPlus*GammaPlus,2)));
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| 88 | runAction->GetHisto(1)->fill(std::log10(thetaPlus*GammaPlus));
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| 89 |
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| 90 | runAction->GetHisto(2)->fill(std::log10(thetaMinus*GammaMinus));
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| 91 | runAction->GetHisto(3)->fill(std::log10(std::fabs(thetaPlus *GammaPlus
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| 92 | -thetaMinus*GammaMinus)));
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| 93 |
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| 94 | runAction->GetHisto(4)->fill(xPlus);
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| 95 | runAction->GetHisto(5)->fill(xMinus);
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| 96 | #endif
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| 97 | }
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| 98 |
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| 99 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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| 100 |
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| 101 |
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