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25 // 25 //
26 // G4HarmonicPolMagField implementation <<
27 // 26 //
28 // Author: V.Grichine, 03.02.1997 << 27 // $Id: G4HarmonicPolMagField.cc,v 1.6 2006/06/29 18:24:00 gunter Exp $
>> 28 // GEANT4 tag $Name: geant4-09-03-patch-02 $
>> 29 //
29 // ------------------------------------------- 30 // -------------------------------------------------------------------
30 31
31 #include "G4HarmonicPolMagField.hh" 32 #include "G4HarmonicPolMagField.hh"
32 #include "globals.hh" 33 #include "globals.hh"
33 34
34 G4HarmonicPolMagField::G4HarmonicPolMagField() << 35 G4HarmonicPolMagField::G4HarmonicPolMagField()
35 <<
36 G4HarmonicPolMagField* G4HarmonicPolMagField:: <<
37 { 36 {
38 return new G4HarmonicPolMagField; <<
39 } 37 }
40 38
41 // ------------------------------------------- << 39 /////////////////////////////////////////////////////////////////////////
42 40
43 G4HarmonicPolMagField::~G4HarmonicPolMagField( << 41 G4HarmonicPolMagField::~G4HarmonicPolMagField()
>> 42 {
>> 43 }
>> 44
>> 45 /////////////////////////////////////////////////////////////////////////
44 46
45 // ------------------------------------------- <<
46 47
47 void G4HarmonicPolMagField::GetFieldValue(cons << 48 void G4HarmonicPolMagField::GetFieldValue(const G4double yTrack[7],
48 << 49 G4double B[3] ) const
49 { 50 {
>> 51 G4int i ;
50 G4double a = 1.00 ; // mm -> m 52 G4double a = 1.00 ; // mm -> m
51 G4double x = a*yTrack[0], y = a*yTrack[1], 53 G4double x = a*yTrack[0], y = a*yTrack[1], z = a*yTrack[2] ;
52 G4double x2 = x*x, y2 = y*y, z2 = z*z ; 54 G4double x2 = x*x, y2 = y*y, z2 = z*z ;
53 G4double x3 = x2*x, y3 = y2*y, z3 = z2*z ; 55 G4double x3 = x2*x, y3 = y2*y, z3 = z2*z ;
54 G4double xy = x*y, xz = x*z, yz = y*z, xyz 56 G4double xy = x*y, xz = x*z, yz = y*z, xyz = x*y*z ;
55 static G4ThreadLocal G4double << 57 static G4double
56 c[24] = { 58 c[24] = {
57 .010, .010, .010, 59 .010, .010, .010, // 3(0)
58 .0001, .0001, .0001, .0001, .0001 << 60 .0001, .0001, .0001, .0001, .0001, // 5(1)
59 .00001, .00001, .00001, .00001, . << 61 .00001, .00001, .00001, .00001, .00001, .00001, .00001, // 7(2)
60 .000001, .000001, .000001, .00000 << 62 .000001, .000001, .000001, .000001, .000001, .000001,
61 .0000001, .0000001, .0000001 << 63 .0000001, .0000001, .0000001 // 9(3)
62 } ; 64 } ; // total : 24
63 65
64 // for(auto i=0;i<24; ++i) << 66 // for(i=0;i<24;i++)
65 // { 67 // {
66 // c[i] = 1.0*c[i] ; 68 // c[i] = 1.0*c[i] ;
67 // } 69 // }
68 B[0] = c[1] 70 B[0] = c[1]
69 -2*c[3]*x + c[4]*z +c[6]*y -2*c[7]*x 71 -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 72 -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 73 +c[13]*(y2-x2) - 6*c[14]*xy
72 -4*c[15]*(3*x*z2-x3) +c[16]*(z3-3*x2 74 -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]* 75 -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 76 +c[22]*(y3-3*x2*y) - 4*c[23]*(3*x*y2-x3) ;
75 77
76 B[1] = c[2] 78 B[1] = c[2]
77 +c[5]*z + c[6]*x + 2*c[7]*y 79 +c[5]*z + c[6]*x + 2*c[7]*y
78 +c[10]*(z2-x2) + c[11]*xz +2*c[12]*y 80 +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/ << 81 +c[17]*(z3-3*x2*z) + c[18]*(x*z2-x3/3) +2*c[19]*y*(z2-x2)
80 +2*c[20]*xyz 82 +2*c[20]*xyz
81 +3*c[21]*z*(y2-x2) + c[22]*(3*x*y2-x 83 +3*c[21]*z*(y2-x2) + c[22]*(3*x*y2-x3) + 4*c[23]*(y3-3*x2*y) ;
82 84
83 B[2] = c[0] 85 B[2] = c[0]
84 +c[3]*z + c[4]*x + c[5]*y 86 +c[3]*z + c[4]*x + c[5]*y
85 +3*c[8]*(z2-x2) + 2*c[9]*xz + 2*c[10 87 +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 88 +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 89 +2*c[18]*xyz
88 +2*c[19]*z*(y2-x2) + c[20]*(x*y2-x3/ 90 +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) << 91 for(i=0;i<3;i++)
90 { 92 {
91 B[i] = 0.1*B[i] ; 93 B[i] = 0.1*B[i] ;
92 } 94 }
93 } 95 }
94 96
95 // ------------------------------------------- 97 // -----------------------------------------------------------------
96 98