Geant4  v4-10.4-release
 모두 클래스 네임스페이스들 파일들 함수 변수 타입정의 열거형 타입 열거형 멤버 Friends 매크로 그룹들 페이지들
G4MonopoleEquation.cc
이 파일의 문서화 페이지로 가기
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
28 //
29 // $Id: G4MonopoleEquation.cc 108824 2018-03-09 11:05:41Z gcosmo $
30 //
31 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
32 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
33 //
34 //
35 // class G4MonopoleEquation
36 //
37 // Class description:
38 //
39 //
40 // This is the standard right-hand side for equation of motion.
41 //
42 // The only case another is required is when using a moving reference
43 // frame ... or extending the class to include additional Forces,
44 // eg an electric field
45 //
46 // 10.11.98 V.Grichine
47 //
48 // 30.04.10 S.Burdin (modified to use for the monopole trajectories).
49 //
50 // 15.06.10 B.Bozsogi (replaced the hardcoded magnetic charge with
51 // the one passed by G4MonopoleTransportation)
52 // +workaround to pass the electric charge.
53 //
54 // 12.07.10 S.Burdin (added equations for the electric charges)
55 // -------------------------------------------------------------------
56 
57 #include "G4MonopoleEquation.hh"
58 #include "globals.hh"
59 #include "G4PhysicalConstants.hh"
60 #include "G4SystemOfUnits.hh"
61 #include <iomanip>
62 
63 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
64 
66  : G4EquationOfMotion( emField )
67 {}
68 
69 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
70 
72 {}
73 
74 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
75 
76 void
78  G4double , // momentum,
79  G4double particleMass)
80 {
81  G4double particleMagneticCharge= particleChargeState.MagneticCharge();
82  G4double particleElectricCharge= particleChargeState.GetCharge();
83 
84  // fElCharge = particleElectricCharge;
85  fElCharge =eplus* particleElectricCharge*c_light;
86 
87  fMagCharge = eplus*particleMagneticCharge*c_light ;
88 
89  // G4cout << " G4MonopoleEquation: ElectricCharge=" << particleElectricCharge
90  // << "; MagneticCharge=" << particleMagneticCharge
91  // << G4endl;
92 
93  fMassCof = particleMass*particleMass ;
94 }
95 
96 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
97 
98 void
100  const G4double Field[],
101  G4double dydx[] ) const
102 {
103  // Components of y:
104  // 0-2 dr/ds,
105  // 3-5 dp/ds - momentum derivatives
106 
107  G4double pSquared = y[3]*y[3] + y[4]*y[4] + y[5]*y[5] ;
108 
109  G4double Energy = std::sqrt( pSquared + fMassCof );
110 
111  G4double pModuleInverse = 1.0/std::sqrt(pSquared);
112 
113  G4double inverse_velocity = Energy * pModuleInverse / c_light;
114 
115  G4double cofEl = fElCharge * pModuleInverse ;
116  G4double cofMag = fMagCharge * Energy * pModuleInverse;
117 
118  dydx[0] = y[3]*pModuleInverse ;
119  dydx[1] = y[4]*pModuleInverse ;
120  dydx[2] = y[5]*pModuleInverse ;
121 
122  // G4double magCharge = twopi * hbar_Planck / (eplus * mu0);
123  // magnetic charge in SI units A*m convention
124  // see http://en.wikipedia.org/wiki/Magnetic_monopole
125  // G4cout << "Magnetic charge: " << magCharge << G4endl;
126  // dp/ds = dp/dt * dt/ds = dp/dt / v = Force / velocity
127  // dydx[3] = fMagCharge * Field[0] * inverse_velocity * c_light;
128  // multiplied by c_light to convert to MeV/mm
129  // dydx[4] = fMagCharge * Field[1] * inverse_velocity * c_light;
130  // dydx[5] = fMagCharge * Field[2] * inverse_velocity * c_light;
131 
132  dydx[3] = cofMag * Field[0] + cofEl * (y[4]*Field[2] - y[5]*Field[1]);
133  dydx[4] = cofMag * Field[1] + cofEl * (y[5]*Field[0] - y[3]*Field[2]);
134  dydx[5] = cofMag * Field[2] + cofEl * (y[3]*Field[1] - y[4]*Field[0]);
135 
136  // G4cout << std::setprecision(5)<< "E=" << Energy
137  // << "; p="<< 1/pModuleInverse
138  // << "; mC="<< magCharge
139  // <<"; x=" << y[0]
140  // <<"; y=" << y[1]
141  // <<"; z=" << y[2]
142  // <<"; dydx[3]=" << dydx[3]
143  // <<"; dydx[4]=" << dydx[4]
144  // <<"; dydx[5]=" << dydx[5]
145  // << G4endl;
146 
147  dydx[6] = 0.;//not used
148 
149  // Lab Time of flight
150  dydx[7] = inverse_velocity;
151  return;
152 }
153 
154 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
Definition of the G4MonopoleEquation class.
Float_t y
Definition: compare.C:6
double G4double
Definition: G4Types.hh:76
G4double MagneticCharge() const
virtual void SetChargeMomentumMass(G4ChargeState particleChargeState, G4double momentum, G4double mass)
static constexpr double eplus
Definition: G4SIunits.hh:199
static constexpr double c_light
virtual void EvaluateRhsGivenB(const G4double y[], const G4double Field[], G4double dydx[]) const
G4double GetCharge() const
G4MonopoleEquation(G4MagneticField *emField)