| 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 | //
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| 27 | // $Id: G4BlinePrimaryGeneratorAction.cc,v 1.3 2006/06/29 17:15:11 gunter Exp $
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| 28 | // GEANT4 tag $Name: $
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| 29 | //
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| 30 | //
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| 31 | // --------------------------------------------------------------------
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| 32 | //
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| 33 | // G4BlinePrimaryGeneratorAction implementation
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| 34 | //
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| 35 | // --------------------------------------------------------------------
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| 36 | // Author: Laurent Desorgher (desorgher@phim.unibe.ch)
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| 37 | // Created - 2003-10-06
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| 38 | // --------------------------------------------------------------------
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| 39 |
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| 40 | #include "G4BlinePrimaryGeneratorAction.hh"
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| 41 |
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| 42 | #include "G4Types.hh"
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| 43 | #include "G4Event.hh"
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| 44 | #include "G4ChargedGeantino.hh"
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| 45 |
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| 46 | ///////////////////////////////////////////////////////////////////////////
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| 47 |
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| 48 | G4BlinePrimaryGeneratorAction::G4BlinePrimaryGeneratorAction()
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| 49 | {
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| 50 | fUserPrimaryAction = 0;
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| 51 | FirstPartOfBline = true;
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| 52 | }
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| 53 |
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| 54 | ///////////////////////////////////////////////////////////////////////////
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| 55 |
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| 56 | G4BlinePrimaryGeneratorAction::~G4BlinePrimaryGeneratorAction()
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| 57 | {
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| 58 | }
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| 59 |
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| 60 | ///////////////////////////////////////////////////////////////////////////
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| 61 |
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| 62 | void G4BlinePrimaryGeneratorAction::GeneratePrimaries(G4Event* anEvent)
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| 63 | {
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| 64 | if (!fUserPrimaryAction)
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| 65 | {
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| 66 | G4Exception("G4BlinePrimaryGeneratorAction::GeneratePrimaries()",
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| 67 | "NullPointer", JustWarning,
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| 68 | "Primary generator action not defined !");
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| 69 | return;
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| 70 | }
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| 71 |
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| 72 | // For the first part of a bline the start position and time are defined
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| 73 | // by using the USER primary action while for the second part the previous
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| 74 | // values are taken.
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| 75 |
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| 76 | if (FirstPartOfBline)
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| 77 | {
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| 78 | // set the position and time defined by using the USER primary action
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| 79 |
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| 80 | G4Event* tmpEvent = new G4Event();
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| 81 | fUserPrimaryAction->GeneratePrimaries(tmpEvent);
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| 82 | BlineStartPosition = tmpEvent->GetPrimaryVertex()->GetPosition();
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| 83 | T0 = tmpEvent->GetPrimaryVertex()->GetT0();
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| 84 | delete tmpEvent;
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| 85 | }
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| 86 | FirstPartOfBline = false;
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| 87 |
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| 88 | G4PrimaryVertex* primary_vertex =
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| 89 | new G4PrimaryVertex(BlineStartPosition, T0);
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| 90 |
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| 91 | // Define the particle to be tracked as Charged Geantino
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| 92 |
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| 93 | G4ChargedGeantino* pdef = G4ChargedGeantino::ChargedGeantino();
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| 94 |
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| 95 | G4double mass = pdef->GetPDGMass();
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| 96 | G4double energy = 10000.*MeV + mass;
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| 97 | G4double pmom = std::sqrt(energy*energy-mass*mass);
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| 98 |
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| 99 | // The momentum direction and energy do not have an effect in tracing of
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| 100 | // bline but still need to be defined.
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| 101 |
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| 102 | G4double px = 0.;
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| 103 | G4double py = 0.;
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| 104 | G4double pz = pmom;
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| 105 |
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| 106 | G4PrimaryParticle* particle = new G4PrimaryParticle(pdef,px,py,pz);
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| 107 | particle->SetMass( mass );
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| 108 | particle->SetCharge(pdef->GetPDGCharge());
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| 109 | primary_vertex->SetPrimary( particle );
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| 110 |
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| 111 | anEvent->AddPrimaryVertex( primary_vertex );
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| 112 | }
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