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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