| 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: NTSTGunGenerator.cc,v 1.5 2006/06/29 18:26:16 gunter Exp $
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| 27 | // GEANT4 tag $Name: HEAD $
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| 28 | //
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| 29 | //
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| 30 |
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| 31 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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| 32 |
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| 33 | #include "NTSTGunGenerator.hh"
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| 34 | #include "NTSTGunMessenger.hh"
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| 35 | #include "G4Event.hh"
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| 36 | #include "G4ParticleTable.hh"
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| 37 | #include "G4ParticleDefinition.hh"
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| 38 | #include "Randomize.hh"
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| 39 |
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| 40 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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| 41 |
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| 42 | NTSTGunGenerator::NTSTGunGenerator()
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| 43 | : dMeanVertex(0.,0.,0.), dRmsVertex (0.,0.,0.), dPolarization(0.,0.,0.),
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| 44 | dPlow(1.), dPhigh(1.), dCoslow(-1.), dCoshigh(+1.0),
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| 45 | dPhilow(0.),dPhihigh(2*pi), dT0(0.), dN(1)
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| 46 | {
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| 47 | messenger = new NTSTGunMessenger(this);
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| 48 | MeanVertex = dMeanVertex;
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| 49 | RmsVertex = dRmsVertex;
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| 50 | Polarization = dPolarization;
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| 51 | Plow = dPlow;
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| 52 | Phigh = dPhigh;
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| 53 | Coslow = dCoslow;
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| 54 | Coshigh = dCoshigh;
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| 55 | Philow = dPhilow;
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| 56 | Phihigh = dPhihigh;
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| 57 | T0 = dT0;
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| 58 | N = dN;
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| 59 | }
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| 60 |
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| 61 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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| 62 |
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| 63 | NTSTGunGenerator::~NTSTGunGenerator()
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| 64 | {
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| 65 | delete messenger;
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| 66 | }
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| 67 |
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| 68 | //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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| 69 |
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| 70 | void
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| 71 | NTSTGunGenerator::GeneratePrimaryVertex(G4Event* anEvent)
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| 72 | {
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| 73 | // this function is called at the begining of event
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| 74 | //
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| 75 | // generate primary vertex
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| 76 | G4double x = MeanVertex.x();
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| 77 | if (RmsVertex.x()!=0) x += RmsVertex.x()*Gauss();
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| 78 | G4double y = MeanVertex.y();
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| 79 | if (RmsVertex.y()!=0) y += RmsVertex.y()*Gauss();
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| 80 | G4double z = MeanVertex.z();
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| 81 | if (RmsVertex.z()!=0) z += RmsVertex.z()*Gauss();
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| 82 | G4double t=0*ns;
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| 83 |
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| 84 | G4PrimaryVertex* vertex = new G4PrimaryVertex(x, y, z, t);
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| 85 |
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| 86 | for (int ipart=0; ipart<GetNumberOfParticles(); ipart++){
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| 87 | //
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| 88 | // generate random direction (modifiy later to select an angular range)
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| 89 | G4double cth = 2.*(G4UniformRand()-0.5);
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| 90 | G4double sth = std::sqrt(1.-cth*cth);
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| 91 | G4double phi = 2*pi*G4UniformRand();
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| 92 | G4double cfi = std::cos(phi);
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| 93 | G4double sfi = std::sin(phi);
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| 94 | G4double p = (Plow + G4UniformRand()*(Phigh - Plow))*GeV;
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| 95 | //
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| 96 | G4PrimaryParticle* part = new G4PrimaryParticle(GetParticleDefinition(),
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| 97 | p*sth*cfi, p*sth*sfi, p*cth);
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| 98 | //
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| 99 | // add to vertex
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| 100 | vertex->SetPrimary( part );
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| 101 | }
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| 102 | //
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| 103 | // add vertex to event
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| 104 | anEvent->AddPrimaryVertex( vertex );
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| 105 | }
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| 106 |
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| 107 |
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| 108 |
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| 109 |
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