Gabriele Cosmo
265 lines
8.8 KiB
C++
265 lines
8.8 KiB
C++
//
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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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// Author: Alfonso Mantero (Alfonso.Mantero@ge.infn.it)
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//
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// History:
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// -----------
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// 02 Sep 2003 Alfonso Mantero created
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//
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// -------------------------------------------------------------------
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#include "XrayFluoMercuryPrimaryGeneratorAction.hh"
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#include "XrayFluoMercuryDetectorConstruction.hh"
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#include "XrayFluoMercuryPrimaryGeneratorMessenger.hh"
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#include "XrayFluoRunAction.hh"
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#include "XrayFluoAnalysisManager.hh"
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#include "XrayFluoDataSet.hh"
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#include "G4PhysicalConstants.hh"
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#include "G4SystemOfUnits.hh"
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#include "G4DataVector.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 "Randomize.hh"
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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XrayFluoMercuryPrimaryGeneratorAction::XrayFluoMercuryPrimaryGeneratorAction(const XrayFluoMercuryDetectorConstruction* XrayFluoDC)
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:globalFlag(false),spectrum("off")
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{
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XrayFluoDetector = XrayFluoDC;
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G4int n_particle = 1;
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particleGun = new G4ParticleGun(n_particle);
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//create a messenger for this class
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gunMessenger = new XrayFluoMercuryPrimaryGeneratorMessenger(this);
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runManager = new XrayFluoRunAction();
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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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particleGun->SetParticleDefinition(particle);
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particleGun->SetParticleMomentumDirection(G4ThreeVector(0.,0.,-1.));
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particleGun->SetParticleEnergy(10.*keV);
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G4double position = -0.5*(XrayFluoDetector->GetWorldSizeZ());
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particleGun->SetParticlePosition(G4ThreeVector(0.*cm,0.*cm,position));
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G4cout << "XrayFluoMercuryPrimaryGeneratorAction created" << G4endl;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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XrayFluoMercuryPrimaryGeneratorAction::~XrayFluoMercuryPrimaryGeneratorAction()
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{
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delete particleGun;
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delete gunMessenger;
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delete runManager;
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G4cout << "XrayFluoMercuryPrimaryGeneratorAction deleted" << G4endl;
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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void XrayFluoMercuryPrimaryGeneratorAction::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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// Conidering the sunas a Poin-like source.
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G4double z0 = -0.5*(XrayFluoDetector->GetWorldSizeZ());
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G4double y0 = 0.*m, x0 = 0.*m;
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// Let's try to illuminate only the prtion of Mercury surface that can be seen by the detector.
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G4double spacecraftLatitude = XrayFluoDetector->GetOrbitInclination();
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G4double mercuryDia = XrayFluoDetector->GetMercuryDia();
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G4double sunDia = XrayFluoDetector->GetSunDia();
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G4double opticField = XrayFluoDetector->GetOpticAperture();
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G4double a = 2*std::tan(opticField/2);
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// if (!pointLikeFlag) {
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// let's decide from wich point of the sun surface the particle is coming:
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G4double theta = std::acos(2.*G4UniformRand() - 1.0);
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G4double phi = 2. * pi * G4UniformRand();
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G4double rho = sunDia/2;
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G4double sunPosX = x0 + rho * std::sin(theta) * std::cos(phi);
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G4double sunPosY = y0 + rho * std::sin(theta) * std::sin(phi);
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G4double sunPosZ = z0 + rho * std::cos(theta);
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particleGun->SetParticlePosition(G4ThreeVector(sunPosX,sunPosY,sunPosZ));
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// the angle at the center of Mercury subtending the area seen by the optics:
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G4double alpha = 2 * a/mercuryDia;
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if(!globalFlag){
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theta = alpha * G4UniformRand() + (180.*deg - spacecraftLatitude)-alpha/2.;
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phi = alpha * G4UniformRand() + 90. * deg - alpha/2.;
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}
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else if(globalFlag){
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theta = pi/2. * rad * G4UniformRand() + 90.*deg ; //was 900., probably an error
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phi = 2*pi*rad * G4UniformRand() ;
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}
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rho = mercuryDia/2.;
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G4double mercuryPosX = rho * std::sin(theta) * std::cos(phi);
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G4double mercuryPosY = rho * std::sin(theta) * std::sin(phi);
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G4double mercuryPosZ = rho * std::cos(theta);
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particleGun->SetParticleMomentumDirection(
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G4ThreeVector(mercuryPosX-sunPosX ,mercuryPosY-sunPosY,mercuryPosZ-sunPosZ));
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// }
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// if (pointLikeFlag) {
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// // theta is the angle that the mean direction of the incident light (on the desired
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// // point of the surface of Mercury) makes with the Z-axis
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// G4double theta = std::asin( mercuryDia/2. * std::sin(spacecraftLatitude) /
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// std::sqrt(std::pow(z0,2)+std::pow(mercuryDia/2.,2)-2*mercuryDia/2.*z0*std::cos(spacecraftLatitude)) );
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// // on the y axis, the light emitted from the Sun must be in [theta-phi;theta+phi]
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// G4double phi = std::asin( mercuryDia/2.*std::sin(spacecraftLatitude) + a*std::cos(spacecraftLatitude) /
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// std::sqrt( std::pow(mercuryDia/2.*std::sin(spacecraftLatitude) + a*std::cos(spacecraftLatitude) , 2) +
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// std::pow(z0 - mercuryDia/2.*std::cos(spacecraftLatitude) - a*std::sin(spacecraftLatitude) , 2)) )
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// - theta;
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// // on the x axis, the light emitted from the Sun must be in [-zeta;zeta]
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// G4double zeta = std::atan( a/std::sqrt(std::pow(z0,2)+std::pow(mercuryDia,2)-2*mercuryDia*z0*std::cos(spacecraftLatitude)) );
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// //alpha in [-zeta;zeta]
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// G4double alpha = (2*zeta)*G4UniformRand() - zeta;
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// //beta in [theta-phi;theta+phi]
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// G4double beta = (G4UniformRand()*2*phi) - phi + theta;
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// G4double dirY = std::sin(beta);
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// G4double dirX = std::sin(alpha);
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// particleGun->SetParticleMomentumDirection(G4ThreeVector(dirX.,dirY,1.));
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// particleGun->SetParticlePosition(G4ThreeVector(x0,y0,z0));
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// }
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//shoot particles according to a certain spectrum
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if (spectrum =="on")
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{
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G4String particle = particleGun->GetParticleDefinition()
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->GetParticleName();
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if(particle == "proton"|| particle == "alpha")
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{
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G4DataVector* energies = runManager->GetEnergies();
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G4DataVector* data = runManager->GetData();
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G4double sum = runManager->GetDataSum();
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G4double partSum = 0;
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G4int j = 0;
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G4double random= sum*G4UniformRand();
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while (partSum<random)
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{
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partSum += (*data)[j];
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j++;
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}
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particleGun->SetParticleEnergy((*energies)[j]);
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}
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else if (particle == "gamma")
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{
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const XrayFluoDataSet* dataSet = runManager->GetGammaSet();
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G4int i = 0;
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G4int id = 0;
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G4double minEnergy = 0. * keV;
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G4double particleEnergy= 0.;
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G4double maxEnergy = 10. * keV;
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G4double energyRange = maxEnergy - minEnergy;
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while ( i == 0)
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{
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G4double random = G4UniformRand();
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G4double randomNum = G4UniformRand(); //*5.0E6;
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particleEnergy = (random*energyRange) + minEnergy;
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if ((dataSet->FindValue(particleEnergy,id)) > randomNum)
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{
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i = 1;
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}
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}
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particleGun->SetParticleEnergy(particleEnergy);
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}
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}
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#ifdef G4ANALYSIS_USE
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G4double partEnergy = particleGun->GetParticleEnergy();
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XrayFluoAnalysisManager* analysis = XrayFluoAnalysisManager::getInstance();
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analysis->analysePrimaryGenerator(partEnergy/keV);
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#endif
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particleGun->GeneratePrimaryVertex(anEvent);
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}
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//....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo....
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