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9.6.p02
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geant4_9_6_p02
examples
extended
medical
fanoCavity
src
PrimaryGeneratorAction.cc
Go to the documentation of this file.
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//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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// $Id$
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//
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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#include "PrimaryGeneratorAction.hh"
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#include "DetectorConstruction.hh"
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#include "PrimaryGeneratorMessenger.hh"
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#include "
G4Event.hh
"
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#include "
G4ParticleGun.hh
"
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#include "
G4ParticleTable.hh
"
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#include "
G4ParticleDefinition.hh
"
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#include "
G4PhysicalConstants.hh
"
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#include "
G4SystemOfUnits.hh
"
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#include "
Randomize.hh
"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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PrimaryGeneratorAction::PrimaryGeneratorAction
(
DetectorConstruction
* det)
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:fDetector(det)
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{
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fParticleGun =
new
G4ParticleGun
(1);
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G4ParticleDefinition
* particle
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=
G4ParticleTable::GetParticleTable
()->
FindParticle
(
"gamma"
);
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fParticleGun->
SetParticleDefinition
(particle);
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fParticleGun->
SetParticleEnergy
(1.25*
MeV
);
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fParticleGun->
SetParticleMomentumDirection
(
G4ThreeVector
(0.,0.,1.));
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fRBeam = 1.;
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//create a messenger for this class
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fGunMessenger =
new
PrimaryGeneratorMessenger
(
this
);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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PrimaryGeneratorAction::~PrimaryGeneratorAction
()
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{
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delete
fParticleGun;
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delete
fGunMessenger;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void
PrimaryGeneratorAction::GeneratePrimaries
(
G4Event
* anEvent)
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{
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//this function is called at the begining of event
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//
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G4double
z0 = -0.5*(fDetector->
GetTotalThickness
());
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G4double
x0 = 0.*
cm
, y0 = 0.*
cm
;
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//beam width
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//
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if
(fRBeam > 0.)
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{
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G4double
beam = fRBeam*(fDetector->
GetWallRadius
());
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G4double
r
= beam*std::sqrt(
G4UniformRand
());
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G4double
theta =
twopi
*
G4UniformRand
();
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x0 = r*std::cos(theta);
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y0 = r*std::sin(theta);
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}
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fParticleGun->
SetParticlePosition
(
G4ThreeVector
(x0,y0,z0));
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fParticleGun->
GeneratePrimaryVertex
(anEvent);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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