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24 // ******************************************* 24 // ********************************************************************
25 // 25 //
26 // G4HarmonicPolMagField implementation 26 // G4HarmonicPolMagField implementation
27 // 27 //
28 // Author: V.Grichine, 03.02.1997 28 // Author: V.Grichine, 03.02.1997
29 // ------------------------------------------- 29 // -------------------------------------------------------------------
30 30
31 #include "G4HarmonicPolMagField.hh" 31 #include "G4HarmonicPolMagField.hh"
32 #include "globals.hh" 32 #include "globals.hh"
33 33
34 G4HarmonicPolMagField::G4HarmonicPolMagField() << 34 G4HarmonicPolMagField::G4HarmonicPolMagField()
>> 35 {
>> 36 }
35 37
36 G4HarmonicPolMagField* G4HarmonicPolMagField:: 38 G4HarmonicPolMagField* G4HarmonicPolMagField::Clone() const
37 { 39 {
38 return new G4HarmonicPolMagField; 40 return new G4HarmonicPolMagField;
39 } 41 }
40 42
41 // ------------------------------------------- 43 // -------------------------------------------------------------------
42 44
43 G4HarmonicPolMagField::~G4HarmonicPolMagField( << 45 G4HarmonicPolMagField::~G4HarmonicPolMagField()
>> 46 {
>> 47 }
44 48
45 // ------------------------------------------- 49 // -------------------------------------------------------------------
46 50
47 void G4HarmonicPolMagField::GetFieldValue(cons << 51 void G4HarmonicPolMagField::GetFieldValue(const G4double yTrack[7],
48 << 52 G4double B[3] ) const
49 { 53 {
50 G4double a = 1.00 ; // mm -> m 54 G4double a = 1.00 ; // mm -> m
51 G4double x = a*yTrack[0], y = a*yTrack[1], 55 G4double x = a*yTrack[0], y = a*yTrack[1], z = a*yTrack[2] ;
52 G4double x2 = x*x, y2 = y*y, z2 = z*z ; 56 G4double x2 = x*x, y2 = y*y, z2 = z*z ;
53 G4double x3 = x2*x, y3 = y2*y, z3 = z2*z ; 57 G4double x3 = x2*x, y3 = y2*y, z3 = z2*z ;
54 G4double xy = x*y, xz = x*z, yz = y*z, xyz 58 G4double xy = x*y, xz = x*z, yz = y*z, xyz = x*y*z ;
55 static G4ThreadLocal G4double 59 static G4ThreadLocal G4double
56 c[24] = { 60 c[24] = {
57 .010, .010, .010, 61 .010, .010, .010, // 3(0)
58 .0001, .0001, .0001, .0001, .0001 62 .0001, .0001, .0001, .0001, .0001, // 5(1)
59 .00001, .00001, .00001, .00001, . 63 .00001, .00001, .00001, .00001, .00001, .00001, .00001, // 7(2)
60 .000001, .000001, .000001, .00000 64 .000001, .000001, .000001, .000001, .000001, .000001,
61 .0000001, .0000001, .0000001 65 .0000001, .0000001, .0000001 // 9(3)
62 } ; 66 } ; // total : 24
63 67
64 // for(auto i=0;i<24; ++i) 68 // for(auto i=0;i<24; ++i)
65 // { 69 // {
66 // c[i] = 1.0*c[i] ; 70 // c[i] = 1.0*c[i] ;
67 // } 71 // }
68 B[0] = c[1] 72 B[0] = c[1]
69 -2*c[3]*x + c[4]*z +c[6]*y -2*c[7]*x 73 -2*c[3]*x + c[4]*z +c[6]*y -2*c[7]*x
70 -6*c[8]*xz + c[9]*(z2-x2) -2*c[10]*x 74 -6*c[8]*xz + c[9]*(z2-x2) -2*c[10]*xy + c[11]*yz - 2*c[12]*xz
71 +c[13]*(y2-x2) - 6*c[14]*xy 75 +c[13]*(y2-x2) - 6*c[14]*xy
72 -4*c[15]*(3*x*z2-x3) +c[16]*(z3-3*x2 76 -4*c[15]*(3*x*z2-x3) +c[16]*(z3-3*x2*z) - 6*c[17]*xyz +c[18]*y*(z2-x2)
73 -2*c[19]*(x*z2+x*y2-2*x3/3) + c[20]* 77 -2*c[19]*(x*z2+x*y2-2*x3/3) + c[20]*z*(y2-x2) - 6*c[21]*xyz
74 +c[22]*(y3-3*x2*y) - 4*c[23]*(3*x*y2 78 +c[22]*(y3-3*x2*y) - 4*c[23]*(3*x*y2-x3) ;
75 79
76 B[1] = c[2] 80 B[1] = c[2]
77 +c[5]*z + c[6]*x + 2*c[7]*y 81 +c[5]*z + c[6]*x + 2*c[7]*y
78 +c[10]*(z2-x2) + c[11]*xz +2*c[12]*y 82 +c[10]*(z2-x2) + c[11]*xz +2*c[12]*yz +2*c[13]*xy + 3*c[14]*(y2-x2)
79 +c[17]*(z3-3*x2*z) + c[18]*(x*z2-x3/ 83 +c[17]*(z3-3*x2*z) + c[18]*(x*z2-x3/3) +2*c[19]*y*(z2-x2)
80 +2*c[20]*xyz 84 +2*c[20]*xyz
81 +3*c[21]*z*(y2-x2) + c[22]*(3*x*y2-x 85 +3*c[21]*z*(y2-x2) + c[22]*(3*x*y2-x3) + 4*c[23]*(y3-3*x2*y) ;
82 86
83 B[2] = c[0] 87 B[2] = c[0]
84 +c[3]*z + c[4]*x + c[5]*y 88 +c[3]*z + c[4]*x + c[5]*y
85 +3*c[8]*(z2-x2) + 2*c[9]*xz + 2*c[10 89 +3*c[8]*(z2-x2) + 2*c[9]*xz + 2*c[10]*yz + c[11]*xy + c[12]*(y2-x2)
86 +4*c[15]*(z3-3*x2*z) + c[16]*(3*x*z2 90 +4*c[15]*(z3-3*x2*z) + c[16]*(3*x*z2-x3) + 3*c[17]*(y*z2-x2*y)
87 +2*c[18]*xyz 91 +2*c[18]*xyz
88 +2*c[19]*z*(y2-x2) + c[20]*(x*y2-x3/ 92 +2*c[19]*z*(y2-x2) + c[20]*(x*y2-x3/3) + c[21]*(y3-3*x2*y) ;
89 for(auto i=0; i<3 ; ++i) 93 for(auto i=0; i<3 ; ++i)
90 { 94 {
91 B[i] = 0.1*B[i] ; 95 B[i] = 0.1*B[i] ;
92 } 96 }
93 } 97 }
94 98
95 // ------------------------------------------- 99 // -----------------------------------------------------------------
96 100