Geant4 Cross Reference

Cross-Referencing   Geant4
Geant4/geometry/magneticfield/src/G4MonopoleEq.cc

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Diff markup

Differences between /geometry/magneticfield/src/G4MonopoleEq.cc (Version 11.3.0) and /geometry/magneticfield/src/G4MonopoleEq.cc (Version 9.0.p1)


  1 //                                                  1 
  2 // *******************************************    
  3 // * License and Disclaimer                       
  4 // *                                              
  5 // * The  Geant4 software  is  copyright of th    
  6 // * the Geant4 Collaboration.  It is provided    
  7 // * conditions of the Geant4 Software License    
  8 // * LICENSE and available at  http://cern.ch/    
  9 // * include a list of copyright holders.         
 10 // *                                              
 11 // * Neither the authors of this software syst    
 12 // * institutes,nor the agencies providing fin    
 13 // * work  make  any representation or  warran    
 14 // * regarding  this  software system or assum    
 15 // * use.  Please see the license in the file     
 16 // * for the full disclaimer and the limitatio    
 17 // *                                              
 18 // * This  code  implementation is the result     
 19 // * technical work of the GEANT4 collaboratio    
 20 // * By using,  copying,  modifying or  distri    
 21 // * any work based  on the software)  you  ag    
 22 // * use  in  resulting  scientific  publicati    
 23 // * acceptance of all terms of the Geant4 Sof    
 24 // *******************************************    
 25 //                                                
 26 // G4MonopoleEq implementation                    
 27 //                                                
 28 // Created: V.Grichine, 17.11.2009                
 29 // -------------------------------------------    
 30                                                   
 31 #include "G4MonopoleEq.hh"                        
 32 #include "globals.hh"                             
 33 #include "G4PhysicalConstants.hh"                 
 34 #include "G4SystemOfUnits.hh"                     
 35                                                   
 36 G4MonopoleEq::G4MonopoleEq(G4ElectroMagneticFi    
 37   : G4EquationOfMotion( emField )                 
 38 {                                                 
 39 }                                                 
 40                                                   
 41 G4MonopoleEq::~G4MonopoleEq() = default;          
 42                                                   
 43 void                                              
 44 G4MonopoleEq::SetChargeMomentumMass(G4ChargeSt    
 45                                     G4double,     
 46                                     G4double p    
 47 {                                                 
 48   G4double pcharge = particleCharge.GetCharge(    
 49   fElectroMagCof =  eplus*pcharge;  // no *c_l    
 50   fElectroMagCof /= 2*fine_structure_const;       
 51                                                   
 52   fMassCof = particleMass*particleMass ;          
 53 }                                                 
 54                                                   
 55 void                                              
 56 G4MonopoleEq::EvaluateRhsGivenB(const G4double    
 57                                 const G4double    
 58                                       G4double    
 59 {                                                 
 60                                                   
 61    // Components of y:                            
 62    //    0-2 dr/ds,                               
 63    //    3-5 d(pc)/ds - momentum derivatives      
 64                                                   
 65    G4double pSquared = y[3]*y[3] + y[4]*y[4] +    
 66                                                   
 67    G4double Energy   = std::sqrt( pSquared + f    
 68    G4double cof2     = Energy*c_light ;           
 69                                                   
 70    G4double pModuleInverse  = 1.0/std::sqrt(pS    
 71                                                   
 72    G4double inverse_velocity = Energy * pModul    
 73                                                   
 74    G4double cof1     = fElectroMagCof*pModuleI    
 75                                                   
 76    dydx[0] = y[3]*pModuleInverse ;                
 77    dydx[1] = y[4]*pModuleInverse ;                
 78    dydx[2] = y[5]*pModuleInverse ;                
 79                                                   
 80    dydx[3] = cof1*(cof2*Field[0] - (y[4]*Field    
 81                                                   
 82    dydx[4] = cof1*(cof2*Field[1] - (y[5]*Field    
 83                                                   
 84    dydx[5] = cof1*(cof2*Field[2] - (y[3]*Field    
 85                                                   
 86    dydx[6] = 0.; //not used                       
 87                                                   
 88    // Lab Time of flight                          
 89    //                                             
 90    dydx[7] = inverse_velocity;                    
 91                                                   
 92    return;                                        
 93 }                                                 
 94