| Geant4 Cross Reference |
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