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F04PrimaryGeneratorAction.cc
Go to the documentation of this file.
Or view
the newest version in sPHENIX GitHub for file F04PrimaryGeneratorAction.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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//
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#include "
G4ios.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 "
G4GeometryManager.hh
"
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#include "
Randomize.hh
"
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#include "
G4PhysicalConstants.hh
"
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#include "
G4SystemOfUnits.hh
"
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#include "
F04PrimaryGeneratorAction.hh
"
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#include "
F04DetectorConstruction.hh
"
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#include "
F04PrimaryGeneratorMessenger.hh
"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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F04PrimaryGeneratorAction::
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F04PrimaryGeneratorAction
(
F04DetectorConstruction
* detectorConstruction)
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: fDetector(detectorConstruction), fRndmFlag(
"off"
), fFirst(
false
),
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fXvertex(0.), fYvertex(0.), fZvertex(0.),
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fVertexdefined(
false
)
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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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fGunMessenger
=
new
F04PrimaryGeneratorMessenger
(
this
);
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G4String
particleName;
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G4ParticleTable
* particleTable =
G4ParticleTable::GetParticleTable
();
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fParticleGun
->
SetParticleDefinition
(particleTable->
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FindParticle(particleName=
"proton"
));
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fParticleGun
->
SetParticleEnergy
(500.*
MeV
);
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fParticleGun
->
SetParticleMomentumDirection
(
G4ThreeVector
(0.,0.,1.));
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fZvertex
= -0.5*(
fDetector
->
GetTargetThickness
());
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fParticleGun
->
SetParticlePosition
(
G4ThreeVector
(
fXvertex
,
fYvertex
,
fZvertex
));
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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F04PrimaryGeneratorAction::~F04PrimaryGeneratorAction
()
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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
F04PrimaryGeneratorAction::GeneratePrimaries
(
G4Event
* anEvent)
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{
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if
(!
fFirst
) {
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fFirst
=
true
;
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G4ThreeVector
direction(0.0,0.0,1.0);
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G4Navigator
* theNavigator =
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G4TransportationManager::GetTransportationManager
()->
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GetNavigatorForTracking();
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if
( theNavigator->
GetWorldVolume
() )
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{
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G4Navigator
* aNavigator =
new
G4Navigator
();
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aNavigator->
SetWorldVolume
(theNavigator->
GetWorldVolume
());
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G4ThreeVector
center(0.,0.,0.);
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aNavigator->
LocateGlobalPointAndSetup
(center,0,
false
);
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G4TouchableHistoryHandle
touchable = aNavigator->
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CreateTouchableHistoryHandle();
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// set Global2local transform
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fGlobal2local
= touchable->
GetHistory
()->
GetTopTransform
();
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direction =
fGlobal2local
.
Inverse
().
TransformAxis
(direction);
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delete
aNavigator;
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}
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fParticleGun
->
SetParticleMomentumDirection
(direction);
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}
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G4double
x0,y0,
z0
;
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if
(
fVertexdefined
)
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{
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x0 =
fXvertex
;
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y0 =
fYvertex
;
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z0 =
fZvertex
;
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}
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else
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{
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x0 = 0. ;
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y0 = 0. ;
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z0 = -0.5*(
fDetector
->
GetTargetThickness
());
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}
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G4double
r0, phi0;
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if
(
fRndmFlag
==
"on"
)
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{
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r0 = (
fDetector
->
GetTargetRadius
())*std::sqrt(
G4UniformRand
());
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phi0 =
twopi
*
G4UniformRand
();
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x0 = r0*std::cos(phi0);
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y0 = r0*std::sin(phi0);
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}
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G4ThreeVector
localPosition(x0,y0,z0);
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G4ThreeVector
globalPosition =
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fGlobal2local
.
Inverse
().
TransformPoint
(localPosition);
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fParticleGun
->
SetParticlePosition
(globalPosition);
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fParticleGun
->
GeneratePrimaryVertex
(anEvent);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void
F04PrimaryGeneratorAction::SetXvertex
(
G4double
x
)
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{
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fVertexdefined
=
true
;
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fXvertex
=
x
;
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G4cout
<<
" X coordinate of the primary vertex = "
<<
fXvertex
/
mm
<<
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" mm."
<<
G4endl
;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void
F04PrimaryGeneratorAction::SetYvertex
(
G4double
y
)
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{
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fVertexdefined
=
true
;
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fYvertex
=
y
;
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G4cout
<<
" Y coordinate of the primary vertex = "
<<
fYvertex
/
mm
<<
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" mm."
<<
G4endl
;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
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void
F04PrimaryGeneratorAction::SetZvertex
(
G4double
z
)
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{
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fVertexdefined
=
true
;
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fZvertex
=
z
;
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G4cout
<<
" Z coordinate of the primary vertex = "
<<
fZvertex
/
mm
<<
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" mm."
<<
G4endl
;
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}
geant4
tree
geant4-10.6-release
examples
extended
field
field04
src
F04PrimaryGeneratorAction.cc
Built by
Jin Huang
. updated:
Wed Jun 29 2022 17:25:05
using
1.8.2 with
ECCE GitHub integration