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>> 27 // $Id: G4CollisionComposite.cc,v 1.9 2010-03-12 15:45:18 gunter Exp $ //
27 28
28 #include "globals.hh" 29 #include "globals.hh"
29 #include "G4SystemOfUnits.hh" 30 #include "G4SystemOfUnits.hh"
30 #include "G4CollisionComposite.hh" 31 #include "G4CollisionComposite.hh"
31 #include "G4VCollision.hh" 32 #include "G4VCollision.hh"
32 #include "G4CollisionVector.hh" 33 #include "G4CollisionVector.hh"
33 #include "G4KineticTrack.hh" 34 #include "G4KineticTrack.hh"
34 #include "G4KineticTrackVector.hh" 35 #include "G4KineticTrackVector.hh"
35 #include "G4VCrossSectionSource.hh" 36 #include "G4VCrossSectionSource.hh"
36 #include "G4HadTmpUtil.hh" 37 #include "G4HadTmpUtil.hh"
37 #include "G4AutoLock.hh" <<
38 38
39 const G4int G4CollisionComposite::nPoints = 32 39 const G4int G4CollisionComposite::nPoints = 32;
40 40
41 const G4double G4CollisionComposite::theT[nPoi << 41 G4double G4CollisionComposite::theT[nPoints] =
42 {.01, .03, .05, .1, .15, .2, .3, .4, .5, .6, . 42 {.01, .03, .05, .1, .15, .2, .3, .4, .5, .6, .7, .8, .9, 1.0, 1.2, 1.4, 1.6, 1.8, 2.0, 2.2, 2.5, 3.0, 3.5, 4.0, 5.0, 6.0, 8.0, 10., 15, 20, 50, 100};
43 43
44 G4CollisionComposite::G4CollisionComposite() 44 G4CollisionComposite::G4CollisionComposite()
45 { 45 {
46 G4MUTEXINIT( bufferMutex ); <<
47 } 46 }
48 47
49 48
50 G4CollisionComposite::~G4CollisionComposite() 49 G4CollisionComposite::~G4CollisionComposite()
51 { << 50 {
52 G4MUTEXDESTROY(bufferMutex); <<
53 std::for_each(components.begin(), components 51 std::for_each(components.begin(), components.end(), G4Delete());
54 } 52 }
55 53
56 54
57 G4double G4CollisionComposite::CrossSection(co 55 G4double G4CollisionComposite::CrossSection(const G4KineticTrack& trk1,
58 const G4KineticTrack& trk2) cons 56 const G4KineticTrack& trk2) const
59 { 57 {
60 G4double crossSect = 0.; 58 G4double crossSect = 0.;
61 const G4VCrossSectionSource* xSource = GetCr 59 const G4VCrossSectionSource* xSource = GetCrossSectionSource();
62 if (xSource != 0) 60 if (xSource != 0)
63 // There is a total cross section for this C 61 // There is a total cross section for this Collision
64 { 62 {
65 crossSect = xSource->CrossSection(trk1,trk 63 crossSect = xSource->CrossSection(trk1,trk2);
66 } 64 }
67 else 65 else
68 { 66 {
69 G4AutoLock l(&bufferMutex); <<
70 // waiting for mutable to enable buffering 67 // waiting for mutable to enable buffering.
71 const_cast<G4CollisionComposite *>(this)-> 68 const_cast<G4CollisionComposite *>(this)->BufferCrossSection(trk1.GetDefinition(), trk2.GetDefinition());
72 // G4cerr << "Buffer filled, reying with sq 69 // G4cerr << "Buffer filled, reying with sqrts = "<< (trk1.Get4Momentum()+trk2.Get4Momentum()).mag() <<G4endl;
73 crossSect = BufferedCrossSection(trk1,trk2 70 crossSect = BufferedCrossSection(trk1,trk2);
74 } 71 }
75 return crossSect; 72 return crossSect;
76 } 73 }
77 74
78 75
79 G4KineticTrackVector* G4CollisionComposite::Fi 76 G4KineticTrackVector* G4CollisionComposite::FinalState(const G4KineticTrack& trk1,
80 const G4KineticTrack& trk2) co 77 const G4KineticTrack& trk2) const
81 { 78 {
82 std::vector<G4double> cxCache; 79 std::vector<G4double> cxCache;
83 G4double partialCxSum = 0.0; 80 G4double partialCxSum = 0.0;
84 81
85 size_t i; 82 size_t i;
86 for (i=0; i<components.size(); i++) 83 for (i=0; i<components.size(); i++)
87 { 84 {
88 G4double partialCx; 85 G4double partialCx;
89 // cout << "comp" << i << " " << components 86 // cout << "comp" << i << " " << components[i]()->GetName();
90 if (components[i]->IsInCharge(trk1,trk2)) 87 if (components[i]->IsInCharge(trk1,trk2))
91 { 88 {
92 partialCx = components[i]->CrossSection( 89 partialCx = components[i]->CrossSection(trk1,trk2);
93 } 90 }
94 else 91 else
95 { 92 {
96 partialCx = 0.0; 93 partialCx = 0.0;
97 } 94 }
98 // cout << " cx=" << partialCx << endl; 95 // cout << " cx=" << partialCx << endl;
99 partialCxSum += partialCx; 96 partialCxSum += partialCx;
100 cxCache.push_back(partialCx); 97 cxCache.push_back(partialCx);
101 } 98 }
102 99
103 G4double random = G4UniformRand()*partialCxS 100 G4double random = G4UniformRand()*partialCxSum;
104 G4double running = 0; 101 G4double running = 0;
105 for (i=0; i<cxCache.size(); i++) 102 for (i=0; i<cxCache.size(); i++)
106 { 103 {
107 running += cxCache[i]; 104 running += cxCache[i];
108 if (running > random) 105 if (running > random)
109 { 106 {
110 return components[i]->FinalState(trk1, t 107 return components[i]->FinalState(trk1, trk2);
111 } 108 }
112 } 109 }
113 // G4cerr <<"in charge = "<<IsInCharge(trk1, 110 // G4cerr <<"in charge = "<<IsInCharge(trk1, trk2)<<G4endl;
114 // G4cerr <<"Cross-section = "<<CrossSection( 111 // G4cerr <<"Cross-section = "<<CrossSection(trk1, trk2)/millibarn<<" "<<running<<" "<<cxCache.size()<<G4endl;
115 // G4cerr <<"Names = "<<trk1.GetDefinition()- 112 // G4cerr <<"Names = "<<trk1.GetDefinition()->GetParticleName()<<", "<<trk2.GetDefinition()->GetParticleName()<<G4endl;
116 // throw G4HadronicException(__FILE__, __LINE 113 // throw G4HadronicException(__FILE__, __LINE__, "G4CollisionComposite: no final state found!");
117 return NULL; 114 return NULL;
118 } 115 }
119 116
120 117
121 G4bool G4CollisionComposite::IsInCharge(const 118 G4bool G4CollisionComposite::IsInCharge(const G4KineticTrack& trk1,
122 const G4KineticTrack& trk2) const 119 const G4KineticTrack& trk2) const
123 { 120 {
124 G4bool isInCharge = false; 121 G4bool isInCharge = false;
125 122
126 // The composite is in charge if any of its 123 // The composite is in charge if any of its components is in charge
127 124
128 const G4CollisionVector* comps = GetComponen 125 const G4CollisionVector* comps = GetComponents();
129 if (comps) 126 if (comps)
130 { 127 {
131 G4CollisionVector::const_iterator iter; 128 G4CollisionVector::const_iterator iter;
132 for (iter = comps->begin(); iter != comp 129 for (iter = comps->begin(); iter != comps->end(); ++iter)
133 { 130 {
134 if ( ((*iter))->IsInCharge(trk1,trk2) ) isI 131 if ( ((*iter))->IsInCharge(trk1,trk2) ) isInCharge = true;
135 } 132 }
136 } 133 }
137 134
138 return isInCharge; 135 return isInCharge;
139 } 136 }
140 137
141 void G4CollisionComposite:: 138 void G4CollisionComposite::
142 BufferCrossSection(const G4ParticleDefinition 139 BufferCrossSection(const G4ParticleDefinition * aP, const G4ParticleDefinition * bP)
143 { 140 {
144 // check if already buffered 141 // check if already buffered
145 size_t i; 142 size_t i;
146 for(i=0; i<theBuffer.size(); i++) 143 for(i=0; i<theBuffer.size(); i++)
147 { 144 {
148 if(theBuffer[i].InCharge(aP, bP)) return; 145 if(theBuffer[i].InCharge(aP, bP)) return;
149 } 146 }
150 // G4cerr << "Buffering for "<<aP->GetPartic 147 // G4cerr << "Buffering for "<<aP->GetParticleName()<<" "<<bP->GetParticleName()<<G4endl;
151 148
152 // buffer the new one. 149 // buffer the new one.
153 G4CrossSectionBuffer aNewBuff(aP, bP); 150 G4CrossSectionBuffer aNewBuff(aP, bP);
154 size_t maxE=nPoints; 151 size_t maxE=nPoints;
155 for(size_t tt=0; tt<maxE; tt++) 152 for(size_t tt=0; tt<maxE; tt++)
156 { 153 {
157 G4double aT = theT[tt]*GeV; 154 G4double aT = theT[tt]*GeV;
158 G4double crossSect = 0; 155 G4double crossSect = 0;
159 // The total cross-section is summed over 156 // The total cross-section is summed over all the component channels
160 157
161 //A.R. 28-Sep-2012 Fix reproducibility pr 158 //A.R. 28-Sep-2012 Fix reproducibility problem
162 // Assign the kinetic ene 159 // Assign the kinetic energy to the lightest of the
163 // two particles, instead 160 // two particles, instead to the first one always.
164 G4double atime = 0; 161 G4double atime = 0;
165 G4double btime = 0; 162 G4double btime = 0;
166 G4ThreeVector aPosition(0,0,0); 163 G4ThreeVector aPosition(0,0,0);
167 G4ThreeVector bPosition(0,0,0); 164 G4ThreeVector bPosition(0,0,0);
168 G4double aM = aP->GetPDGMass(); 165 G4double aM = aP->GetPDGMass();
169 G4double bM = bP->GetPDGMass(); 166 G4double bM = bP->GetPDGMass();
170 G4double aE = aM; 167 G4double aE = aM;
171 G4double bE = bM; 168 G4double bE = bM;
172 G4ThreeVector aMom(0,0,0); 169 G4ThreeVector aMom(0,0,0);
173 G4ThreeVector bMom(0,0,0); 170 G4ThreeVector bMom(0,0,0);
174 if ( aM <= bM ) { 171 if ( aM <= bM ) {
175 aE += aT; 172 aE += aT;
176 aMom = G4ThreeVector(0,0,std::sqrt(aE*aE 173 aMom = G4ThreeVector(0,0,std::sqrt(aE*aE-aM*aM));
177 } else { 174 } else {
178 bE += aT; 175 bE += aT;
179 bMom = G4ThreeVector(0,0,std::sqrt(bE*bE 176 bMom = G4ThreeVector(0,0,std::sqrt(bE*bE-bM*bM));
180 } 177 }
181 G4LorentzVector a4Momentum(aE, aMom); 178 G4LorentzVector a4Momentum(aE, aMom);
182 G4LorentzVector b4Momentum(bE, bMom); 179 G4LorentzVector b4Momentum(bE, bMom);
183 G4KineticTrack a(aP, atime, aPosition, a4 << 180 G4KineticTrack a(const_cast<G4ParticleDefinition *>(aP), atime, aPosition, a4Momentum);
184 G4KineticTrack b(bP, btime, bPosition, b4 << 181 G4KineticTrack b(const_cast<G4ParticleDefinition *>(bP), btime, bPosition, b4Momentum);
185 182
186 for (i=0; i<components.size(); i++) 183 for (i=0; i<components.size(); i++)
187 { 184 {
188 if(components[i]->IsInCharge(a,b)) 185 if(components[i]->IsInCharge(a,b))
189 { 186 {
190 crossSect += components[i]->CrossSection(a, 187 crossSect += components[i]->CrossSection(a,b);
191 } 188 }
192 } 189 }
193 G4double sqrts = (a4Momentum+b4Momentum). 190 G4double sqrts = (a4Momentum+b4Momentum).mag();
194 aNewBuff.push_back(sqrts, crossSect); 191 aNewBuff.push_back(sqrts, crossSect);
195 } 192 }
196 theBuffer.push_back(std::move(aNewBuff)); << 193 theBuffer.push_back(aNewBuff);
197 // theBuffer.back().Print(); 194 // theBuffer.back().Print();
198 } 195 }
199 196
200 197
201 G4double G4CollisionComposite:: 198 G4double G4CollisionComposite::
202 BufferedCrossSection(const G4KineticTrack& trk 199 BufferedCrossSection(const G4KineticTrack& trk1, const G4KineticTrack& trk2) const
203 { 200 {
204 for(size_t i=0; i<theBuffer.size(); i++) 201 for(size_t i=0; i<theBuffer.size(); i++)
205 { 202 {
206 if(theBuffer[i].InCharge(trk1.GetDefiniti 203 if(theBuffer[i].InCharge(trk1.GetDefinition(), trk2.GetDefinition()))
207 { 204 {
208 return theBuffer[i].CrossSection(trk1, 205 return theBuffer[i].CrossSection(trk1, trk2);
209 } 206 }
210 } 207 }
211 throw G4HadronicException(__FILE__, __LINE_ 208 throw G4HadronicException(__FILE__, __LINE__, "G4CollisionComposite::BufferedCrossSection - Blitz !!");
212 return 0; 209 return 0;
213 } 210 }
214 211
215 212