| Geant4 Cross Reference |
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26 //
27 /// \file Hadr09.cc
28 /// \brief Main program of the hadronic/Hadr09 example
29 //
30 //------------------------------------------------------------------------
31 // This program shows how to use the class Hadronic Generator.
32 // The class HadronicGenerator is a kind of "hadronic generator", i.e.
33 // provides Geant4 final states (i.e. secondary particles) produced by
34 // hadron-nuclear inelastic collisions.
35 // Please see the class itself for more information.
36 //
37 // The use of the class Hadronic Generator is very simple:
38 // the constructor needs to be invoked only once - specifying the name
39 // of the Geant4 "physics case" to consider ("FTFP_BERT" will be
40 // considered as default is the name is not specified) - and then one
41 // method needs to be called at each collision, specifying the type of
42 // collision (hadron, energy, direction, material) to be simulated.
43 // The class HadronicGenerator is expected to work also in a
44 // multi-threaded environment with "external" threads (i.e. threads
45 // that are not necessarily managed by Geant4 run-manager):
46 // each thread should have its own instance of the class.
47 //
48 // See the string "***LOOKHERE***" below for the setting of parameters
49 // of this example: the "physics case", the set of possibilities from
50 // which to sample the projectile (i.e. whether the projectile is a
51 // hadron or an ion - in the case of hadron projectile, a list of hadrons
52 // is possible from which to sample at each collision; in the case of
53 // ion projectile, only one type of ion needs to be specified),
54 // the kinetic energy of the projectile (which can be sampled within
55 // an interval), whether the direction of the projectile is fixed or
56 // sampled at each collision, the target material (a list of materials
57 // is possible, from which the target material can be sampled at each
58 // collision, and then from this target material, the target nucleus
59 // will be chosen randomly by Geant4 itself), and whether to print out
60 // some information or not and how frequently.
61 // Once a well-defined type of hadron-nucleus or nucleus-nucleus
62 // inelastic collision has been chosen, the method
63 // HadronicGenerator::GenerateInteraction
64 // returns the secondaries produced by that interaction (in the form
65 // of a G4VParticleChange object).
66 // Some information about this final-state is printed out as an example.
67 //
68 // Usage: Hadr09
69 //------------------------------------------------------------------------
70
71 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
72 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
73
74 #include <iomanip>
75 #include "globals.hh"
76 #include "G4ios.hh"
77 #include "G4PhysicalConstants.hh"
78 #include "G4SystemOfUnits.hh"
79 #include "G4Material.hh"
80 #include "G4NistManager.hh"
81 #include "G4VParticleChange.hh"
82 #include "G4UnitsTable.hh"
83 #include "G4SystemOfUnits.hh"
84 #include "HadronicGenerator.hh"
85 #include "G4GenericIon.hh"
86 #include "G4ProcessManager.hh"
87 #include "G4ParticleTable.hh"
88 #include "G4IonTable.hh"
89 #include "CLHEP/Random/Randomize.h"
90 #include "CLHEP/Random/Ranlux64Engine.h"
91
92 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......
93
94 int main( int , char** ) {
95
96 G4cout << "=== Test of the HadronicGenerator ===" << G4endl;
97
98 // See the HadronicGenerator class for the possibilities and meaning of the "physics cases".
99 // ( In short, it is the name of the Geant4 hadronic model used for the simulation of
100 // the collision, with the possibility of having a transition between two models in
101 // a given energy interval, as in physics lists. )
102 //const G4String namePhysics = "FTFP_BERT"; //***LOOKHERE*** PHYSICS CASE
103 //const G4String namePhysics = "FTFP_BERT_ATL";
104 //const G4String namePhysics = "QGSP_BERT";
105 //const G4String namePhysics = "QGSP_BIC";
106 //const G4String namePhysics = "FTFP_INCLXX";
107 const G4String namePhysics = "FTFP";
108 //const G4String namePhysics = "QGSP";
109 //const G4String namePhysics = "BERT";
110 //const G4String namePhysics = "BIC";
111 //const G4String namePhysics = "IonBIC";
112 //const G4String namePhysics = "INCL";
113
114 // The kinetic energy of the projectile will be sampled randomly, with flat probability
115 // in the interval [minEnergy, maxEnergy].
116 G4double minEnergy = 1.0*CLHEP::GeV; //***LOOKHERE*** HADRON PROJECTILE MIN Ekin
117 G4double maxEnergy = 30.0*CLHEP::GeV; //***LOOKHERE*** HADRON PROJECTILE MAX Ekin
118
119 const G4int numCollisions = 1000; //***LOOKHERE*** NUMBER OF COLLISIONS
120
121 // Enable or disable the print out of this program: if enabled, the number of secondaries
122 // produced in each collisions is printed out; moreover, once every "printingGap"
123 // collisions, the list of secondaries is printed out.
124 const G4bool isPrintingEnabled = true; //***LOOKHERE*** PRINT OUT ON/OFF
125 const G4int printingGap = 100; //***LOOKHERE*** GAP IN PRINTING
126
127 // Vector of Geant4 names of hadron projectiles: one of this will be sampled randomly
128 // (with uniform probability) for each collision, when the projectile is not an ion.
129 // Note: comment out the corresponding line in order to exclude a particle.
130 std::vector< G4String > vecProjectiles; //***LOOKHERE*** POSSIBLE HADRON PROJECTILES
131 vecProjectiles.push_back( "pi-" );
132 //Note: vecProjectiles.push_back( "pi0" ); // Excluded because too short-lived
133 vecProjectiles.push_back( "pi+" );
134 vecProjectiles.push_back( "kaon-" );
135 vecProjectiles.push_back( "kaon+" );
136 vecProjectiles.push_back( "kaon0L" );
137 vecProjectiles.push_back( "kaon0S" );
138 //Note: vecProjectiles.push_back( "eta" ); // Excluded because too short-lived
139 //Note: vecProjectiles.push_back( "eta_prime" ); // Excluded because too short-lived
140 vecProjectiles.push_back( "proton" );
141 vecProjectiles.push_back( "neutron" );
142 vecProjectiles.push_back( "deuteron" );
143 vecProjectiles.push_back( "triton" );
144 vecProjectiles.push_back( "He3" );
145 vecProjectiles.push_back( "alpha" );
146 vecProjectiles.push_back( "lambda" );
147 vecProjectiles.push_back( "sigma-" );
148 //Note: vecProjectiles.push_back( "sigma0" ); // Excluded because too short-lived
149 vecProjectiles.push_back( "sigma+" );
150 vecProjectiles.push_back( "xi-" );
151 vecProjectiles.push_back( "xi0" );
152 vecProjectiles.push_back( "omega-" );
153 vecProjectiles.push_back( "anti_proton" );
154 vecProjectiles.push_back( "anti_neutron" );
155 vecProjectiles.push_back( "anti_lambda" );
156 vecProjectiles.push_back( "anti_sigma-" );
157 //Note: vecProjectiles.push_back( "anti_sigma0" ); // Excluded because too short-lived
158 vecProjectiles.push_back( "anti_sigma+" );
159 vecProjectiles.push_back( "anti_xi-" );
160 vecProjectiles.push_back( "anti_xi0" );
161 vecProjectiles.push_back( "anti_omega-" );
162 vecProjectiles.push_back( "anti_deuteron" );
163 vecProjectiles.push_back( "anti_triton" );
164 vecProjectiles.push_back( "anti_He3" );
165 vecProjectiles.push_back( "anti_alpha" );
166 // Charm and bottom hadrons
167 vecProjectiles.push_back( "D+" );
168 vecProjectiles.push_back( "D-" );
169 vecProjectiles.push_back( "D0" );
170 vecProjectiles.push_back( "anti_D0" );
171 vecProjectiles.push_back( "Ds+" );
172 vecProjectiles.push_back( "Ds-" );
173 //Note: vecProjectiles.push_back( "etac" ); // Excluded because too short-lived
174 //Note: vecProjectiles.push_back( "J/psi" ); // Excluded because too short-lived
175 vecProjectiles.push_back( "B+" );
176 vecProjectiles.push_back( "B-" );
177 vecProjectiles.push_back( "B0" );
178 vecProjectiles.push_back( "anti_B0" );
179 vecProjectiles.push_back( "Bs0" );
180 vecProjectiles.push_back( "anti_Bs0" );
181 vecProjectiles.push_back( "Bc+" );
182 vecProjectiles.push_back( "Bc-" );
183 //Note: vecProjectiles.push_back( "Upsilon" ); // Excluded because too short-lived
184 vecProjectiles.push_back( "lambda_c+" );
185 vecProjectiles.push_back( "anti_lambda_c+" );
186 //Note: vecProjectiles.push_back( "sigma_c+" ); // Excluded because too short-lived
187 //Note: vecProjectiles.push_back( "anti_sigma_c+" ); // Excluded because too short-lived
188 //Note: vecProjectiles.push_back( "sigma_c0" ); // Excluded because too short-lived
189 //Note: vecProjectiles.push_back( "anti_sigma_c0" ); // Excluded because too short-lived
190 //Note: vecProjectiles.push_back( "sigma_c++" ); // Excluded because too short-lived
191 //Note: vecProjectiles.push_back( "anti_sigma_c++" ); // Excluded because too short-lived
192 vecProjectiles.push_back( "xi_c+" );
193 vecProjectiles.push_back( "anti_xi_c+" );
194 vecProjectiles.push_back( "xi_c0" );
195 vecProjectiles.push_back( "anti_xi_c0" );
196 vecProjectiles.push_back( "omega_c0" );
197 vecProjectiles.push_back( "anti_omega_c0" );
198 vecProjectiles.push_back( "lambda_b" );
199 vecProjectiles.push_back( "anti_lambda_b" );
200 //Note: vecProjectiles.push_back( "sigma_b+" ); // Excluded because too short-lived
201 //Note: vecProjectiles.push_back( "anti_sigma_b+" ); // Excluded because too short-lived
202 //Note: vecProjectiles.push_back( "sigma_b0" ); // Excluded because too short-lived
203 //Note: vecProjectiles.push_back( "sigma_b0" ); // Excluded because too short-lived
204 //Note: vecProjectiles.push_back( "sigma_b-" ); // Excluded because too short-lived
205 //Note: vecProjectiles.push_back( "anti_sigma_b-" ); // Excluded because too short-lived
206 vecProjectiles.push_back( "xi_b0" );
207 vecProjectiles.push_back( "anti_xi_b0" );
208 vecProjectiles.push_back( "xi_b-" );
209 vecProjectiles.push_back( "anti_xi_b-" );
210 vecProjectiles.push_back( "omega_b-" );
211 vecProjectiles.push_back( "anti_omega_b-" );
212
213 G4ParticleDefinition* projectileNucleus = nullptr;
214 G4GenericIon* gion = G4GenericIon::GenericIon();
215 gion->SetProcessManager( new G4ProcessManager( gion ) );
216 G4ParticleTable* partTable = G4ParticleTable::GetParticleTable();
217 G4IonTable* ions = partTable->GetIonTable();
218 partTable->SetReadiness();
219 ions->CreateAllIon();
220 ions->CreateAllIsomer();
221
222 const G4bool isProjectileIon = true; //***LOOKHERE*** HADRON (false) OR ION (true) PROJECTILE ?
223 if ( isProjectileIon ) {
224 minEnergy = 40.0*13.0*CLHEP::GeV; //***LOOKHERE*** ION PROJECTILE MIN Ekin
225 maxEnergy = 40.0*13.0*CLHEP::GeV; //***LOOKHERE*** ION PROJECTILE MAX Ekin
226 G4int ionZ = 18, ionA = 40; //***LOOKHERE*** ION PROJECTILE (Z, A)
227 projectileNucleus = partTable->GetIonTable()->GetIon( ionZ, ionA, 0.0 );
228 }
229
230 // Vector of Geant4 NIST names of materials: one of this will be sampled randomly
231 // (with uniform probability) for each collision and used as target material.
232 // Note: comment out the corresponding line in order to exclude a material;
233 // or, vice versa, add a new line to extend the list with another material.
234 std::vector< G4String > vecMaterials; //***LOOKHERE*** : NIST TARGET MATERIALS
235 //vecMaterials.push_back( "G4_H" );
236 //vecMaterials.push_back( "G4_He" );
237 //vecMaterials.push_back( "G4_Be" );
238 //vecMaterials.push_back( "G4_C" );
239 //vecMaterials.push_back( "G4_Al" );
240 //vecMaterials.push_back( "G4_Si" );
241 vecMaterials.push_back( "G4_Sc" );
242 //vecMaterials.push_back( "G4_Ar" );
243 //vecMaterials.push_back( "G4_Fe" );
244 //vecMaterials.push_back( "G4_Cu" );
245 //vecMaterials.push_back( "G4_W" );
246 //vecMaterials.push_back( "G4_Pb" );
247
248 const G4int numProjectiles = vecProjectiles.size();
249 const G4int numMaterials = vecMaterials.size();
250
251 G4cout << G4endl
252 << "================= Configuration ==================" << G4endl
253 << "Model: " << namePhysics << G4endl
254 << "Ekin: [ " << minEnergy/CLHEP::GeV << " , " << maxEnergy/CLHEP::GeV
255 << " ] GeV" << G4endl
256 << "Number of collisions: " << numCollisions << G4endl
257 << "Number of hadron projectiles: " << numProjectiles << G4endl
258 << "Number of materials: " << numMaterials << G4endl
259 << "IsIonProjectile: " << ( projectileNucleus != nullptr ? "true \t" : "false" )
260 << ( projectileNucleus != nullptr ? projectileNucleus->GetParticleName() : "") << G4endl
261 << "===================================================" << G4endl
262 << G4endl;
263
264 CLHEP::Ranlux64Engine defaultEngine( 1234567, 4 );
265 CLHEP::HepRandom::setTheEngine( &defaultEngine );
266 G4int seed = time( NULL );
267 CLHEP::HepRandom::setTheSeed( seed );
268 G4cout << G4endl << " Initial seed = " << seed << G4endl << G4endl;
269
270 // Instanciate the HadronicGenerator providing the name of the "physics case"
271 HadronicGenerator* theHadronicGenerator = new HadronicGenerator( namePhysics );
272 //****************************************************************************
273
274 if ( theHadronicGenerator == nullptr ) {
275 G4cerr << "ERROR: theHadronicGenerator is NULL !" << G4endl;
276 return 1;
277 } else if ( ! theHadronicGenerator->IsPhysicsCaseSupported() ) {
278 G4cerr << "ERROR: this physics case is NOT supported !" << G4endl;
279 return 2;
280 }
281
282 // Loop over the collisions
283 G4double rnd1, rnd2, rnd3, rnd4, rnd5, rnd6, normalization, projectileEnergy;
284 G4VParticleChange* aChange = nullptr;
285 for ( G4int i = 0; i < numCollisions; ++i ) {
286 // Draw some random numbers to select the hadron-nucleus interaction:
287 // projectile hadron, projectile kinetic energy, projectile direction, and target material.
288 rnd1 = CLHEP::HepRandom::getTheEngine()->flat();
289 rnd2 = CLHEP::HepRandom::getTheEngine()->flat();
290 rnd3 = CLHEP::HepRandom::getTheEngine()->flat();
291 rnd4 = CLHEP::HepRandom::getTheEngine()->flat();
292 rnd5 = CLHEP::HepRandom::getTheEngine()->flat();
293 rnd6 = CLHEP::HepRandom::getTheEngine()->flat();
294 // Sample the projectile kinetic energy
295 projectileEnergy = minEnergy + rnd1*( maxEnergy - minEnergy );
296 if ( projectileEnergy <= 0.0 ) projectileEnergy = minEnergy;
297 // Sample the projectile direction
298 normalization = 1.0 / std::sqrt( rnd2*rnd2 + rnd3*rnd3 + rnd4*rnd4 );
299 const G4bool isOnSmearingDirection = false; //***LOOKHERE*** IF true THEN SMEAR DIRECTION
300 G4ThreeVector aDirection = G4ThreeVector( 0.0, 0.0, 1.0 ); //***LOOKHERE*** ELSE USE THIS FIXED DIRECTION
301 if ( isOnSmearingDirection ) {
302 aDirection = G4ThreeVector( normalization*rnd2, normalization*rnd3, normalization*rnd4 );
303 }
304 // Sample the projectile hadron from the vector vecProjectiles
305 G4int index_projectile = std::trunc( rnd5*numProjectiles );
306 G4String nameProjectile = vecProjectiles[ index_projectile ];
307 G4ParticleDefinition* projectile = partTable->FindParticle( nameProjectile );
308 if ( projectileNucleus ) {
309 nameProjectile = projectileNucleus->GetParticleName();
310 projectile = projectileNucleus;
311 }
312 // Sample the target material from the vector vecMaterials
313 // (Note: the target nucleus will be sampled by Geant4)
314 G4int index_material = std::trunc( rnd6*numMaterials );
315 G4String nameMaterial = vecMaterials[ index_material ];
316 G4Material* material = G4NistManager::Instance()->FindOrBuildMaterial( nameMaterial );
317 if ( material == nullptr ) {
318 G4cerr << "ERROR: Material " << nameMaterial << " is not found !" << G4endl;
319 return 3;
320 }
321 if ( isPrintingEnabled ) {
322 G4cout << "\t Collision " << i << " ; projectile=" << nameProjectile;
323 if ( projectileNucleus ) {
324 G4cout << " ; Ekin[MeV]/nucleon=" << projectileEnergy /
325 static_cast< G4double >( std::abs( projectileNucleus->GetBaryonNumber() ) );
326 } else {
327 G4cout << " ; Ekin[MeV]=" << projectileEnergy;
328 }
329 G4cout << " ; direction=" << aDirection << " ; material=" << nameMaterial;
330 }
331
332 // Call here the "hadronic generator" to get the secondaries produced by the hadronic collision
333 aChange = theHadronicGenerator->GenerateInteraction( projectile, projectileEnergy,
334 /* ********************************************** */ aDirection, material );
335
336 G4int nsec = aChange ? aChange->GetNumberOfSecondaries() : 0;
337 G4bool isPrintingOfSecondariesEnabled = false;
338 if ( isPrintingEnabled ) {
339 G4cout << G4endl << "\t --> #secondaries=" << nsec
340 << " ; impactParameter[fm]=" << theHadronicGenerator->GetImpactParameter() / fermi
341 << " ; #projectileSpectatorNucleons=" << theHadronicGenerator->GetNumberOfProjectileSpectatorNucleons()
342 << " ; #targetSpectatorNucleons=" << theHadronicGenerator->GetNumberOfTargetSpectatorNucleons()
343 << " ; #NNcollisions=" << theHadronicGenerator->GetNumberOfNNcollisions() << G4endl;
344 if ( i % printingGap == 0 ) {
345 isPrintingOfSecondariesEnabled = true;
346 G4cout << "\t \t List of produced secondaries: " << G4endl;
347 }
348 }
349 // Loop over produced secondaries and eventually print out some information.
350 for ( G4int j = 0; j < nsec; ++j ) {
351 const G4DynamicParticle* sec = aChange->GetSecondary(j)->GetDynamicParticle();
352 if ( isPrintingOfSecondariesEnabled ) {
353 G4cout << "\t \t \t j=" << j << "\t" << sec->GetDefinition()->GetParticleName()
354 << "\t p=" << sec->Get4Momentum() << " MeV" << G4endl;
355 }
356 delete aChange->GetSecondary(j);
357 }
358 if ( aChange ) aChange->Clear();
359 }
360
361 G4cout << G4endl << " Final random number = " << CLHEP::HepRandom::getTheEngine()->flat()
362 << G4endl << "=== End of test ===" << G4endl;
363 }
364
365 //....oooOO0OOooo........oooOO0OOooo........oooOO0OOooo........oooOO0OOooo......