Geant4 Cross Reference |
1 // 1 // 2 // ******************************************* 2 // ******************************************************************** 3 // * License and Disclaimer << 3 // * DISCLAIMER * 4 // * 4 // * * 5 // * The Geant4 software is copyright of th << 5 // * The following disclaimer summarizes all the specific disclaimers * 6 // * the Geant4 Collaboration. It is provided << 6 // * of contributors to this software. The specific disclaimers,which * 7 // * conditions of the Geant4 Software License << 7 // * govern, are listed with their locations in: * 8 // * LICENSE and available at http://cern.ch/ << 8 // * http://cern.ch/geant4/license * 9 // * include a list of copyright holders. << 10 // * 9 // * * 11 // * Neither the authors of this software syst 10 // * Neither the authors of this software system, nor their employing * 12 // * institutes,nor the agencies providing fin 11 // * institutes,nor the agencies providing financial support for this * 13 // * work make any representation or warran 12 // * work make any representation or warranty, express or implied, * 14 // * regarding this software system or assum 13 // * regarding this software system or assume any liability for its * 15 // * use. Please see the license in the file << 14 // * use. * 16 // * for the full disclaimer and the limitatio << 17 // * 15 // * * 18 // * This code implementation is the result << 16 // * This code implementation is the intellectual property of the * 19 // * technical work of the GEANT4 collaboratio << 17 // * GEANT4 collaboration. * 20 // * By using, copying, modifying or distri << 18 // * By copying, distributing or modifying the Program (or any work * 21 // * any work based on the software) you ag << 19 // * based on the Program) you indicate your acceptance of this * 22 // * use in resulting scientific publicati << 20 // * statement, and all its terms. * 23 // * acceptance of all terms of the Geant4 Sof << 24 // ******************************************* 21 // ******************************************************************** 25 // 22 // >> 23 // $Id: G4UniversalFluctuation.hh,v 1.2 2005/02/07 14:37:50 maire Exp $ >> 24 // GEANT4 tag $Name: geant4-07-00-patch-01 $ >> 25 // 26 // ------------------------------------------- 26 // ------------------------------------------------------------------- 27 // 27 // 28 // GEANT4 Class header file 28 // GEANT4 Class header file 29 // 29 // 30 // 30 // 31 // File name: G4UniversalFluctuation 31 // File name: G4UniversalFluctuation 32 // 32 // 33 // Author: V.Ivanchenko make a class wi << 33 // Author: Vladimir Ivanchenko 34 // 34 // 35 // Creation date: 03.01.2002 35 // Creation date: 03.01.2002 36 // 36 // 37 // Modifications: 37 // Modifications: 38 // 38 // >> 39 // 09-12-02 remove warnings (V.Ivanchenko) >> 40 // 28-12-02 add method Dispersion (V.Ivanchenko) >> 41 // 07-02-03 change signature (V.Ivanchenko) >> 42 // 13-02-03 Add name (V.Ivanchenko) >> 43 // 16-10-03 Changed interface to Initialisation (V.Ivanchenko) >> 44 // 07-02-05 define problim = 5.e-3 (mma) 39 // 45 // 40 // Class Description: 46 // Class Description: 41 // 47 // 42 // Implementation of energy loss fluctuations << 48 // Implementation of energy loss fluctuations 43 49 44 // ------------------------------------------- 50 // ------------------------------------------------------------------- 45 // 51 // 46 52 47 #ifndef G4UniversalFluctuation_h 53 #ifndef G4UniversalFluctuation_h 48 #define G4UniversalFluctuation_h 1 54 #define G4UniversalFluctuation_h 1 49 55 >> 56 50 #include "G4VEmFluctuationModel.hh" 57 #include "G4VEmFluctuationModel.hh" 51 #include "G4ParticleDefinition.hh" << 52 #include "G4Poisson.hh" << 53 #include <CLHEP/Random/RandomEngine.h> << 54 58 55 class G4UniversalFluctuation : public G4VEmFlu 59 class G4UniversalFluctuation : public G4VEmFluctuationModel 56 { 60 { 57 61 58 public: 62 public: 59 63 60 explicit G4UniversalFluctuation(const G4Stri << 64 G4UniversalFluctuation(const G4String& nam = "UniFluc"); 61 65 62 ~G4UniversalFluctuation() override; << 66 virtual ~G4UniversalFluctuation(); 63 67 64 G4double SampleFluctuations(const G4Material << 68 G4double SampleFluctuations(const G4Material*, 65 const G4DynamicParticle*, << 69 const G4DynamicParticle*, 66 const G4double, << 70 G4double&, 67 const G4double, const G4double) ov << 71 G4double&, 68 << 72 G4double&); 69 G4double Dispersion(const G4Material*, << 73 70 const G4DynamicParticle*, << 74 G4double Dispersion( const G4Material*, 71 const G4double, const G4 << 75 const G4DynamicParticle*, 72 const G4double) override << 76 G4double&, 73 << 77 G4double&); 74 // Initialisation for a new particle type << 75 void InitialiseMe(const G4ParticleDefinition << 76 << 77 // Initialisation prestep << 78 void SetParticleAndCharge(const G4ParticleDe << 79 G4double q2) override; << 80 78 81 // hide assignment operator << 79 void InitialiseMe(const G4ParticleDefinition*); 82 G4UniversalFluctuation & operator= << 83 (const G4UniversalFluctuation &right) = dele << 84 G4UniversalFluctuation(const G4UniversalFluc << 85 80 86 protected: 81 protected: 87 82 88 virtual G4double SampleGlandz(CLHEP::HepRand << 83 private: 89 const G4Materi << 90 84 91 inline void AddExcitation(CLHEP::HepRandomEn << 85 // hide assignment operator 92 const G4double ax, << 86 G4UniversalFluctuation & operator=(const G4UniversalFluctuation &right); 93 G4double& eav, << 87 G4UniversalFluctuation(const G4UniversalFluctuation&); 94 G4double& eloss, G << 95 << 96 inline void SampleGauss(CLHEP::HepRandomEngi << 97 const G4double eav, << 98 G4double& eloss); << 99 << 100 // particle properties << 101 G4double particleMass = 0.0; << 102 G4double m_Inv_particleMass = DBL_MAX; << 103 G4double m_massrate = DBL_MAX; << 104 G4double chargeSquare = 1.0; << 105 << 106 // material properties << 107 G4double ipotFluct = 0.0; << 108 G4double ipotLogFluct = 0.0; << 109 G4double e0 = 0.0; << 110 88 111 // model parameters << 89 const G4ParticleDefinition* particle; 112 G4double minNumberInteractionsBohr = 10.0; << 90 const G4Material* lastMaterial; 113 G4double minLoss; << 114 G4double nmaxCont = 8.0; << 115 G4double rate = 0.56; << 116 G4double fw = 4.0; << 117 G4double a0 = 42.0; << 118 G4double w2 = 0.0; << 119 G4double meanLoss = 0.0; << 120 << 121 const G4ParticleDefinition* particle = nullp << 122 G4double* rndmarray = nullptr; << 123 G4int sizearray = 30; << 124 }; << 125 91 126 //....oooOO0OOooo........oooOO0OOooo........oo << 92 G4double particleMass; >> 93 G4double chargeSquare; 127 94 128 inline void << 95 // data members to speed up the fluctuation calculation 129 G4UniversalFluctuation::AddExcitation(CLHEP::H << 96 G4double ipotFluct; 130 const G4 << 97 G4double electronDensity; 131 G4double << 98 // G4double zeff; 132 G4double << 99 133 { << 100 G4double f1Fluct; 134 if(ax > nmaxCont) { << 101 G4double f2Fluct; 135 eav += ax*ex; << 102 G4double e1Fluct; 136 esig2 += ax*ex*ex; << 103 G4double e2Fluct; 137 } else { << 104 G4double rateFluct; 138 const G4int p = (G4int)G4Poisson(ax); << 105 G4double e1LogFluct; 139 if(p > 0) { eloss += ((p + 1) - 2.*rndm->f << 106 G4double e2LogFluct; 140 } << 107 G4double ipotLogFluct; 141 } << 108 142 << 109 G4double minNumberInteractionsBohr; 143 //....oooOO0OOooo........oooOO0OOooo........oo << 110 G4double theBohrBeta2; 144 << 111 G4double minLoss; 145 inline void << 112 G4double problim; 146 G4UniversalFluctuation::SampleGauss(CLHEP::Hep << 113 G4double sumalim; 147 const G4do << 114 G4double alim; 148 G4double& << 115 G4double nmaxCont1; 149 { << 116 G4double nmaxCont2; 150 G4double x = eav; << 117 }; 151 const G4double sig = std::sqrt(esig2); << 152 if(eav < 0.25*sig) { << 153 x += (2.*rndm->flat() - 1.)*eav; << 154 } else { << 155 do { << 156 x = G4RandGauss::shoot(rndm, eav, sig); << 157 } while (x < 0.0 || x > 2*eav); << 158 // Loop checking, 23-Feb-2016, Vladimir Iv << 159 } << 160 eloss += x; << 161 } << 162 118 163 //....oooOO0OOooo........oooOO0OOooo........oo 119 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo...... 164 120 165 #endif 121 #endif 166 122 167 123