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Geant4/geometry/magneticfield/src/G4MonopoleEq.cc

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Differences between /geometry/magneticfield/src/G4MonopoleEq.cc (Version 11.3.0) and /geometry/magneticfield/src/G4MonopoleEq.cc (Version 10.2)


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 25 //                                                 25 //
 26 // G4MonopoleEq implementation                 << 
 27 //                                                 26 //
 28 // Created: V.Grichine, 17.11.2009             <<  27 // $Id: G4MonopoleEq.cc 69699 2013-05-13 08:50:30Z gcosmo $
                                                   >>  28 //
                                                   >>  29 //
                                                   >>  30 //  This is the right-hand side for equation of motion for a 
                                                   >>  31 //   magnetic charge in a combined Electro-Magnetic field
                                                   >>  32 //
                                                   >>  33 //  d(p_c)/ds=g{c-energyB_ - p_c x E}/pc
                                                   >>  34 //
                                                   >>  35 //  17.11.09   V.Grichine
                                                   >>  36 //
 29 // -------------------------------------------     37 // -------------------------------------------------------------------
 30                                                    38 
 31 #include "G4MonopoleEq.hh"                         39 #include "G4MonopoleEq.hh"
 32 #include "globals.hh"                              40 #include "globals.hh"
 33 #include "G4PhysicalConstants.hh"                  41 #include "G4PhysicalConstants.hh"
 34 #include "G4SystemOfUnits.hh"                      42 #include "G4SystemOfUnits.hh"
 35                                                    43 
 36 G4MonopoleEq::G4MonopoleEq(G4ElectroMagneticFi << 
 37   : G4EquationOfMotion( emField )              << 
 38 {                                              << 
 39 }                                              << 
 40                                                << 
 41 G4MonopoleEq::~G4MonopoleEq() = default;       << 
 42                                                << 
 43 void                                               44 void  
 44 G4MonopoleEq::SetChargeMomentumMass(G4ChargeSt     45 G4MonopoleEq::SetChargeMomentumMass(G4ChargeState particleCharge, // e+ units
 45                                     G4double,  <<  46                         G4double,
 46                                     G4double p     47                                     G4double particleMass)
 47 {                                                  48 {
 48   G4double pcharge = particleCharge.GetCharge(     49   G4double pcharge = particleCharge.GetCharge();
 49   fElectroMagCof =  eplus*pcharge;  // no *c_l     50   fElectroMagCof =  eplus*pcharge;  // no *c_light as for ususal q
 50   fElectroMagCof /= 2*fine_structure_const;        51   fElectroMagCof /= 2*fine_structure_const;
 51                                                    52 
 52   fMassCof = particleMass*particleMass ;           53   fMassCof = particleMass*particleMass ; 
 53 }                                                  54 }
 54                                                    55 
                                                   >>  56 
                                                   >>  57 
 55 void                                               58 void
 56 G4MonopoleEq::EvaluateRhsGivenB(const G4double     59 G4MonopoleEq::EvaluateRhsGivenB(const G4double y[],
 57                                 const G4double <<  60                       const G4double Field[],
 58                                       G4double <<  61                       G4double dydx[] ) const
 59 {                                                  62 {
 60                                                    63 
 61    // Components of y:                             64    // Components of y:
 62    //    0-2 dr/ds,                                65    //    0-2 dr/ds, 
 63    //    3-5 d(pc)/ds - momentum derivatives       66    //    3-5 d(pc)/ds - momentum derivatives 
 64                                                    67 
 65    G4double pSquared = y[3]*y[3] + y[4]*y[4] +     68    G4double pSquared = y[3]*y[3] + y[4]*y[4] + y[5]*y[5] ;
 66                                                    69 
 67    G4double Energy   = std::sqrt( pSquared + f     70    G4double Energy   = std::sqrt( pSquared + fMassCof );
 68    G4double cof2     = Energy*c_light ;            71    G4double cof2     = Energy*c_light ;
 69                                                    72 
 70    G4double pModuleInverse  = 1.0/std::sqrt(pS     73    G4double pModuleInverse  = 1.0/std::sqrt(pSquared) ;
 71                                                    74 
                                                   >>  75    //  G4double inverse_velocity = Energy * c_light * pModuleInverse;
 72    G4double inverse_velocity = Energy * pModul     76    G4double inverse_velocity = Energy * pModuleInverse / c_light;
 73                                                    77 
 74    G4double cof1     = fElectroMagCof*pModuleI     78    G4double cof1     = fElectroMagCof*pModuleInverse ;
 75                                                    79 
                                                   >>  80    //  G4double vDotE = y[3]*Field[3] + y[4]*Field[4] + y[5]*Field[5] ;
                                                   >>  81 
 76    dydx[0] = y[3]*pModuleInverse ;                 82    dydx[0] = y[3]*pModuleInverse ;                         
 77    dydx[1] = y[4]*pModuleInverse ;                 83    dydx[1] = y[4]*pModuleInverse ;                         
 78    dydx[2] = y[5]*pModuleInverse ;                 84    dydx[2] = y[5]*pModuleInverse ;                        
 79                                                    85 
 80    dydx[3] = cof1*(cof2*Field[0] - (y[4]*Field     86    dydx[3] = cof1*(cof2*Field[0] - (y[4]*Field[5] - y[5]*Field[4])) ;
 81                                                    87    
 82    dydx[4] = cof1*(cof2*Field[1] - (y[5]*Field     88    dydx[4] = cof1*(cof2*Field[1] - (y[5]*Field[3] - y[3]*Field[5])) ; 
 83                                                    89  
 84    dydx[5] = cof1*(cof2*Field[2] - (y[3]*Field     90    dydx[5] = cof1*(cof2*Field[2] - (y[3]*Field[4] - y[4]*Field[3])) ;  
 85                                                    91 
 86    dydx[6] = 0.; //not used                    <<  92    dydx[6] = 0.;//not used
 87                                                    93 
 88    // Lab Time of flight                           94    // Lab Time of flight
 89    //                                          << 
 90    dydx[7] = inverse_velocity;                     95    dydx[7] = inverse_velocity;
 91                                                <<  96    return ;
 92    return;                                     << 
 93 }                                                  97 }
 94                                                    98