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B1PrimaryGeneratorAction.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file B1PrimaryGeneratorAction.cc
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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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#include "B1PrimaryGeneratorAction.hh"
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#include "
G4LogicalVolumeStore.hh
"
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#include "
G4LogicalVolume.hh
"
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#include "
G4Box.hh
"
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#include "
G4RunManager.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 "
G4SystemOfUnits.hh
"
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#include "
Randomize.hh
"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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B1PrimaryGeneratorAction::B1PrimaryGeneratorAction
()
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:
G4VUserPrimaryGeneratorAction
(),
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fParticleGun(0),
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fEnvelopeBox(0)
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{
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G4int
n_particle = 1;
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fParticleGun
=
new
G4ParticleGun
(n_particle);
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// default particle kinematic
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G4ParticleTable
* particleTable =
G4ParticleTable::GetParticleTable
();
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G4String
particleName;
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G4ParticleDefinition
*
particle
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= particleTable->
FindParticle
(particleName=
"gamma"
);
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fParticleGun
->
SetParticleDefinition
(particle);
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fParticleGun
->
SetParticleMomentumDirection
(
G4ThreeVector
(0.,0.,1.));
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fParticleGun
->
SetParticleEnergy
(6.*
MeV
);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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B1PrimaryGeneratorAction::~B1PrimaryGeneratorAction
()
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{
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delete
fParticleGun
;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void
B1PrimaryGeneratorAction::GeneratePrimaries
(
G4Event
* anEvent)
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{
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//this function is called at the begining of ecah event
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//
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// In order to avoid dependence of PrimaryGeneratorAction
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// on DetectorConstruction class we get Envelope volume
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// from G4LogicalVolumeStore.
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G4double
envSizeXY = 0;
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G4double
envSizeZ = 0;
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if
(!
fEnvelopeBox
)
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{
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G4LogicalVolume
* envLV
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=
G4LogicalVolumeStore::GetInstance
()->
GetVolume
(
"Envelope"
);
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if
( envLV )
fEnvelopeBox
=
dynamic_cast<
G4Box
*
>
(envLV->
GetSolid
());
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}
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if
(
fEnvelopeBox
) {
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envSizeXY =
fEnvelopeBox
->
GetXHalfLength
()*2.;
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envSizeZ =
fEnvelopeBox
->
GetZHalfLength
()*2.;
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}
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else
{
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G4ExceptionDescription
msg;
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msg <<
"Envelope volume of box shape not found.\n"
;
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msg <<
"Perhaps you have changed geometry.\n"
;
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msg <<
"The gun will be place at the center."
;
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G4Exception
(
"B1PrimaryGeneratorAction::GeneratePrimaries()"
,
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"MyCode0002"
,
JustWarning
,msg);
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}
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G4double
size = 0.8;
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G4double
x0 = size * envSizeXY * (
G4UniformRand
()-0.5);
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G4double
y0 = size * envSizeXY * (
G4UniformRand
()-0.5);
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G4double
z0
= -0.5 * envSizeZ;
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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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geant4
tree
geant4-10.6-release
examples
basic
B1
src
B1PrimaryGeneratorAction.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:01
using
1.8.2 with
ECCE GitHub integration