// // ******************************************************************** // * License and Disclaimer * // * * // * The Geant4 software is copyright of the Copyright Holders of * // * the Geant4 Collaboration. It is provided under the terms and * // * conditions of the Geant4 Software License, included in the file * // * LICENSE and available at http://cern.ch/geant4/license . These * // * include a list of copyright holders. * // * * // * Neither the authors of this software system, nor their employing * // * institutes,nor the agencies providing financial support for this * // * work make any representation or warranty, express or implied, * // * regarding this software system or assume any liability for its * // * use. Please see the license in the file LICENSE and URL above * // * for the full disclaimer and the limitation of liability. * // * * // * This code implementation is the result of the scientific and * // * technical work of the GEANT4 collaboration. * // * By using, copying, modifying or distributing the software (or * // * any work based on the software) you agree to acknowledge its * // * use in resulting scientific publications, and indicate your * // * acceptance of all terms of the Geant4 Software license. * // ******************************************************************** // // $Id: G4EnergyLossForExtrapolator.hh,v 1.12 2008/11/13 14:14:07 vnivanch Exp $ // GEANT4 tag $Name: geant4-09-02 $ // //--------------------------------------------------------------------------- // // ClassName: G4EnergyLossForExtrapolator // // Description: This class provide calculation of energy loss, fluctuation, // and msc angle // // Author: 09.12.04 V.Ivanchenko // // Modification: // 08-04-05 Rename Propogator -> Extrapolator // 16-03-06 Add muon tables // 21-03-06 Add verbosity defined in the constructor and Initialisation // start only when first public method is called (V.Ivanchenko) // 03-05-06 Remove unused pointer G4Material* from number of methods (VI) // 28-07-07 Add maxEnergyTransfer for computation of energy loss (VI) // //---------------------------------------------------------------------------- // //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... #ifndef G4EnergyLossForExtrapolator_h #define G4EnergyLossForExtrapolator_h 1 #include "globals.hh" #include "G4PhysicsTable.hh" #include class G4ParticleDefinition; class G4Material; class G4MaterialCutsCouple; class G4ProductionCuts; //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... class G4EnergyLossForExtrapolator { public: G4EnergyLossForExtrapolator(G4int verb = 1); ~G4EnergyLossForExtrapolator(); G4double ComputeDEDX(G4double kinEnergy, const G4ParticleDefinition*); G4double ComputeRange(G4double kinEnergy, const G4ParticleDefinition*); G4double ComputeEnergy(G4double range, const G4ParticleDefinition*); G4double EnergyAfterStep(G4double kinEnergy, G4double step, const G4Material*, const G4ParticleDefinition*); G4double EnergyBeforeStep(G4double kinEnergy, G4double step, const G4Material*, const G4ParticleDefinition*); G4double TrueStepLength(G4double kinEnergy, G4double step, const G4Material*, const G4ParticleDefinition* part); inline G4double EnergyAfterStep(G4double kinEnergy, G4double step, const G4Material*, const G4String& particleName); inline G4double EnergyBeforeStep(G4double kinEnergy, G4double step, const G4Material*, const G4String& particleName); inline G4double AverageScatteringAngle(G4double kinEnergy, G4double step, const G4Material*, const G4ParticleDefinition* part); inline G4double AverageScatteringAngle(G4double kinEnergy, G4double step, const G4Material*, const G4String& particleName); inline G4double ComputeTrueStep(const G4Material*, const G4ParticleDefinition* part, G4double kinEnergy, G4double stepLength); inline G4double EnergyDispersion(G4double kinEnergy, G4double step, const G4Material*, const G4ParticleDefinition*); inline G4double EnergyDispersion(G4double kinEnergy, G4double step, const G4Material*, const G4String& particleName); inline void SetVerbose(G4int val); inline void SetMinKinEnergy(G4double); inline void SetMaxKinEnergy(G4double); inline void SetMaxEnergyTransfer(G4double); private: void Initialisation(); G4bool SetupKinematics(const G4ParticleDefinition*, const G4Material*, G4double kinEnergy); G4PhysicsTable* PrepareTable(); const G4ParticleDefinition* FindParticle(const G4String& name); void ComputeElectronDEDX(const G4ParticleDefinition* part, G4PhysicsTable* table); void ComputeMuonDEDX(const G4ParticleDefinition* part, G4PhysicsTable* table); void ComputeProtonDEDX(const G4ParticleDefinition* part, G4PhysicsTable* table); void ComputeTrasportXS(const G4ParticleDefinition* part, G4PhysicsTable* table); inline G4double ComputeValue(G4double x, const G4PhysicsTable* table); // hide assignment operator G4EnergyLossForExtrapolator & operator=(const G4EnergyLossForExtrapolator &right); G4EnergyLossForExtrapolator(const G4EnergyLossForExtrapolator&); const G4ParticleDefinition* currentParticle; const G4ParticleDefinition* electron; const G4ParticleDefinition* positron; const G4ParticleDefinition* muonPlus; const G4ParticleDefinition* muonMinus; const G4ParticleDefinition* proton; G4ProductionCuts* cuts; std::vector couples; G4String currentParticleName; G4PhysicsTable* dedxElectron; G4PhysicsTable* dedxPositron; G4PhysicsTable* dedxMuon; G4PhysicsTable* dedxProton; G4PhysicsTable* rangeElectron; G4PhysicsTable* rangePositron; G4PhysicsTable* rangeMuon; G4PhysicsTable* rangeProton; G4PhysicsTable* invRangeElectron; G4PhysicsTable* invRangePositron; G4PhysicsTable* invRangeMuon; G4PhysicsTable* invRangeProton; G4PhysicsTable* mscElectron; const G4Material* currentMaterial; G4int index; G4double electronDensity; G4double radLength; G4double mass; G4double charge2; G4double kineticEnergy; G4double gam; G4double bg2; G4double beta2; G4double tmax; G4double linLossLimit; G4double emin; G4double emax; G4double maxEnergyTransfer; G4int nbins; G4int nmat; G4int verbose; G4bool isInitialised; }; //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... inline G4double G4EnergyLossForExtrapolator::EnergyAfterStep(G4double kinEnergy, G4double step, const G4Material* mat, const G4String& name) { return EnergyAfterStep(kinEnergy,step,mat,FindParticle(name)); } //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... inline G4double G4EnergyLossForExtrapolator::EnergyBeforeStep(G4double kinEnergy, G4double step, const G4Material* mat, const G4String& name) { return EnergyBeforeStep(kinEnergy,step,mat,FindParticle(name)); } //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... inline G4double G4EnergyLossForExtrapolator::AverageScatteringAngle(G4double kinEnergy, G4double step, const G4Material* mat, const G4String& name) { return AverageScatteringAngle(kinEnergy,step,mat,FindParticle(name)); } //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... inline G4double G4EnergyLossForExtrapolator::EnergyDispersion(G4double kinEnergy, G4double step, const G4Material* mat, const G4String& name) { return EnergyDispersion(kinEnergy,step,mat,FindParticle(name)); } //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... inline G4double G4EnergyLossForExtrapolator::AverageScatteringAngle(G4double kinEnergy, G4double stepLength, const G4Material* mat, const G4ParticleDefinition* part) { G4double theta = 0.0; if(SetupKinematics(part, mat, kinEnergy)) { G4double t = stepLength/radLength; G4double y = std::max(0.001, t); theta = 19.23*MeV*std::sqrt(charge2*t)*(1.0 + 0.038*std::log(y))/(beta2*gam*mass); } return theta; } //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... inline G4double G4EnergyLossForExtrapolator::ComputeTrueStep(const G4Material* mat, const G4ParticleDefinition* part, G4double kinEnergy, G4double stepLength) { G4double theta = AverageScatteringAngle(kinEnergy,stepLength,mat,part); return stepLength*std::sqrt(1.0 + 0.625*theta*theta); } //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... inline G4double G4EnergyLossForExtrapolator::EnergyDispersion(G4double kinEnergy, G4double stepLength, const G4Material* mat, const G4ParticleDefinition* part) { G4double sig2 = 0.0; if(SetupKinematics(part, mat, kinEnergy)) { G4double step = ComputeTrueStep(mat,part,kinEnergy,stepLength); sig2 = (1.0/beta2 - 0.5)*twopi_mc2_rcl2*tmax*step*electronDensity*charge2; } return sig2; } //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... inline G4double G4EnergyLossForExtrapolator::ComputeValue(G4double x, const G4PhysicsTable* table) { G4double res = 0.0; G4bool b; if(table) res = ((*table)[index])->GetValue(x, b); return res; } //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... inline void G4EnergyLossForExtrapolator::SetVerbose(G4int val) { verbose = val; } //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... inline void G4EnergyLossForExtrapolator::SetMinKinEnergy(G4double val) { emin = val; } //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... inline void G4EnergyLossForExtrapolator::SetMaxKinEnergy(G4double val) { emax = val; } //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... inline void G4EnergyLossForExtrapolator::SetMaxEnergyTransfer(G4double val) { maxEnergyTransfer = val; } //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo.... #endif