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25 //
26 /*
27 * =============================================================================
28 *
29 * Filename: CexmcPrimaryGeneratorAction.cc
30 *
31 * Description: primary particle position, direction, energy etc.
32 *
33 * Version: 1.0
34 * Created: 11.10.2009 14:43:03
35 * Revision: none
36 * Compiler: gcc
37 *
38 * Author: Alexey Radkov (),
39 * Company: PNPI
40 *
41 * =============================================================================
42 */
43
44 #include <G4Event.hh>
45 #include <G4ParticleTable.hh>
46 #include <globals.hh>
47 #include <Randomize.hh>
48 #include "CexmcPrimaryGeneratorAction.hh"
49 #include "CexmcPrimaryGeneratorActionMessenger.hh"
50 #include "CexmcParticleGun.hh"
51 #include "CexmcCommon.hh"
52
53
54 CexmcPrimaryGeneratorAction::CexmcPrimaryGeneratorAction(
55 CexmcPhysicsManager * physicsManager ) :
56 particleGun( NULL ), fwhmPosX( 0 ), fwhmPosY( 0 ), fwhmDirX( 0 ),
57 fwhmDirY( 0 ), messenger( NULL )
58 {
59 particleGun = new CexmcParticleGun( physicsManager );
60 messenger = new CexmcPrimaryGeneratorActionMessenger( this );
61 }
62
63
64 CexmcPrimaryGeneratorAction::~CexmcPrimaryGeneratorAction()
65 {
66 delete particleGun;
67 delete messenger;
68 }
69
70
71 void CexmcPrimaryGeneratorAction::GeneratePrimaries( G4Event * event )
72 {
73 particleGun->PrepareForNewEvent();
74
75 const G4ThreeVector & origPos( particleGun->GetOrigPosition() );
76 const G4ThreeVector & origDir( particleGun->GetOrigDirection() );
77 G4double origMomentumAmp( particleGun->GetOrigMomentumAmp() );
78
79 G4double randPosX( G4RandGauss::shoot( origPos.x(),
80 fwhmPosX * CexmcFwhmToStddev ) );
81 G4double randPosY( G4RandGauss::shoot( origPos.y(),
82 fwhmPosY * CexmcFwhmToStddev ) );
83 G4ThreeVector newPos( randPosX, randPosY, origPos.z() );
84
85 G4double randAngleX( G4RandGauss::shoot( origDir.x(),
86 fwhmDirX * CexmcFwhmToStddev ) );
87 G4double randAngleY( G4RandGauss::shoot( origDir.y(),
88 fwhmDirY * CexmcFwhmToStddev ) );
89 G4ThreeVector newAngle( randAngleX, randAngleY, origDir.z() );
90
91 G4double newMomentumAmp( G4RandGauss::shoot( origMomentumAmp,
92 fwhmMomentumAmp * origMomentumAmp *
93 CexmcFwhmToStddev ) );
94
95 particleGun->SetParticlePosition( newPos );
96 particleGun->SetParticleMomentumDirection( newAngle );
97 particleGun->SetParticleMomentum( newMomentumAmp );
98
99 particleGun->GeneratePrimaryVertex( event );
100 }
101
102
103 CexmcParticleGun * CexmcPrimaryGeneratorAction::GetParticleGun( void )
104 {
105 return particleGun;
106 }
107
108