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 | // |
---|
26 | // |
---|
27 | // $Id: testPropagateSpin.cc,v 1.17 2006/06/29 18:25:06 gunter Exp $ |
---|
28 | // GEANT4 tag $Name: $ |
---|
29 | // |
---|
30 | // |
---|
31 | // |
---|
32 | // Started from testG4Navigator1.cc,v 1.7 1996/08/29 15:42 pkent |
---|
33 | // Locate & Step within simple boxlike geometry, both |
---|
34 | // with and without voxels. Parameterised volumes are included. |
---|
35 | |
---|
36 | #include <assert.h> |
---|
37 | // #include "ApproxEqual.hh" |
---|
38 | |
---|
39 | // Global defs |
---|
40 | #include "globals.hh" |
---|
41 | |
---|
42 | #include "G4Navigator.hh" |
---|
43 | |
---|
44 | #include "G4LogicalVolume.hh" |
---|
45 | #include "G4VPhysicalVolume.hh" |
---|
46 | #include "G4PVPlacement.hh" |
---|
47 | #include "G4PVParameterised.hh" |
---|
48 | #include "G4VPVParameterisation.hh" |
---|
49 | #include "G4Box.hh" |
---|
50 | |
---|
51 | #include "G4GeometryManager.hh" |
---|
52 | |
---|
53 | #include "G4RotationMatrix.hh" |
---|
54 | #include "G4ThreeVector.hh" |
---|
55 | |
---|
56 | #include "G4UniformMagField.hh" |
---|
57 | |
---|
58 | #include "G4ios.hh" |
---|
59 | #include <iomanip> |
---|
60 | |
---|
61 | // Sample Parameterisation |
---|
62 | class G4LinScale : public G4VPVParameterisation |
---|
63 | { |
---|
64 | virtual void ComputeTransformation(const G4int n, |
---|
65 | G4VPhysicalVolume* pRep) const |
---|
66 | { |
---|
67 | pRep->SetTranslation(G4ThreeVector(0,(n-1)*15,0)); |
---|
68 | } |
---|
69 | |
---|
70 | virtual void ComputeDimensions(G4Box &pBox, |
---|
71 | const G4int n, |
---|
72 | const G4VPhysicalVolume*) const |
---|
73 | { |
---|
74 | pBox.SetXHalfLength(10); |
---|
75 | pBox.SetYHalfLength(5+n); |
---|
76 | pBox.SetZHalfLength(5+n); |
---|
77 | } |
---|
78 | |
---|
79 | virtual void ComputeDimensions(G4Tubs &, |
---|
80 | const G4int , |
---|
81 | const G4VPhysicalVolume*) const {} |
---|
82 | virtual void ComputeDimensions(G4Trd &, |
---|
83 | const G4int, |
---|
84 | const G4VPhysicalVolume*) const {} |
---|
85 | virtual void ComputeDimensions(G4Cons &, |
---|
86 | const G4int , |
---|
87 | const G4VPhysicalVolume*) const {} |
---|
88 | virtual void ComputeDimensions(G4Trap &, |
---|
89 | const G4int , |
---|
90 | const G4VPhysicalVolume*) const {} |
---|
91 | virtual void ComputeDimensions(G4Hype &, |
---|
92 | const G4int , |
---|
93 | const G4VPhysicalVolume*) const {} |
---|
94 | virtual void ComputeDimensions(G4Orb &, |
---|
95 | const G4int , |
---|
96 | const G4VPhysicalVolume*) const {} |
---|
97 | virtual void ComputeDimensions(G4Sphere &, |
---|
98 | const G4int , |
---|
99 | const G4VPhysicalVolume*) const {} |
---|
100 | virtual void ComputeDimensions(G4Torus &, |
---|
101 | const G4int , |
---|
102 | const G4VPhysicalVolume*) const {} |
---|
103 | virtual void ComputeDimensions(G4Para &, |
---|
104 | const G4int , |
---|
105 | const G4VPhysicalVolume*) const {} |
---|
106 | virtual void ComputeDimensions(G4Polycone &, |
---|
107 | const G4int , |
---|
108 | const G4VPhysicalVolume*) const {} |
---|
109 | virtual void ComputeDimensions(G4Polyhedra &, |
---|
110 | const G4int , |
---|
111 | const G4VPhysicalVolume*) const {} |
---|
112 | }; |
---|
113 | G4LinScale myParam; |
---|
114 | |
---|
115 | // Build simple geometry: |
---|
116 | // 4 small cubes + 1 slab (all G4Boxes) are positioned inside a larger cuboid |
---|
117 | G4VPhysicalVolume* BuildGeometry() |
---|
118 | { |
---|
119 | |
---|
120 | G4Box *myHugeBox= new G4Box("huge box",15*m,15*m,25*m); |
---|
121 | G4Box *myBigBox= new G4Box("big cube",10*m,10*m,10*m); |
---|
122 | G4Box *mySmallBox= new G4Box("smaller cube",2.5*m,2.5*m,2.5*m); |
---|
123 | G4Box *myTinyBox= new G4Box("tiny cube",.25*m,.25*m,.25*m); |
---|
124 | |
---|
125 | // World Volume |
---|
126 | // |
---|
127 | G4LogicalVolume *worldLog=new G4LogicalVolume(myHugeBox,0, |
---|
128 | "World",0,0,0); |
---|
129 | // Logical with no material,field, |
---|
130 | // sensitive detector or user limits |
---|
131 | |
---|
132 | G4PVPlacement *worldPhys=new |
---|
133 | G4PVPlacement(0,G4ThreeVector(0,0,0), "World",worldLog, |
---|
134 | 0,false,0); |
---|
135 | // Note: no mother pointer set |
---|
136 | |
---|
137 | // Create the logical Volumes |
---|
138 | // |
---|
139 | // G4LogicalVolume(*pSolid, *pMaterial, Name, *pField, *pSDetector, *pULimits) |
---|
140 | // |
---|
141 | G4LogicalVolume *BigBoxLog=new G4LogicalVolume(myBigBox,0, |
---|
142 | "Crystal Box (large)",0,0,0); |
---|
143 | G4LogicalVolume *smallBoxLog=new G4LogicalVolume(mySmallBox,0, |
---|
144 | "Crystal Box (small)"); |
---|
145 | G4LogicalVolume *tinyBoxLog=new G4LogicalVolume(myTinyBox,0, |
---|
146 | "Crystal Box (tiny)"); |
---|
147 | |
---|
148 | |
---|
149 | // Place them. |
---|
150 | // |
---|
151 | // 1) Two big boxes in the world volume |
---|
152 | // |
---|
153 | // G4PVPlacement *BigTg1Phys= |
---|
154 | new G4PVPlacement(0,G4ThreeVector(0,0,-15*m), |
---|
155 | "Big Target 1",BigBoxLog, |
---|
156 | worldPhys,false,0); |
---|
157 | // G4PVPlacement *BigTg2Phys= |
---|
158 | new G4PVPlacement(0,G4ThreeVector(0,0, 15*m), |
---|
159 | "Big Target 2",BigBoxLog, |
---|
160 | worldPhys,false,0); |
---|
161 | |
---|
162 | // 2) Four (medium) boxes in X & Y near the origin of the world volume |
---|
163 | // |
---|
164 | // G4PVPlacement *MedTg3a_Phys= |
---|
165 | new G4PVPlacement(0,G4ThreeVector(0, 7.5*m,0), |
---|
166 | "Target 3a",smallBoxLog, |
---|
167 | worldPhys,false,0); |
---|
168 | // G4PVPlacement *MedTg3b_Phys= |
---|
169 | new G4PVPlacement(0,G4ThreeVector(0,-7.5*m,0), |
---|
170 | "Target 3b",smallBoxLog, |
---|
171 | worldPhys,false,0); |
---|
172 | // G4PVPlacement *MedTg3c_Phys= |
---|
173 | new G4PVPlacement(0,G4ThreeVector(-7.5*m,0,0), |
---|
174 | "Target 3c",smallBoxLog, |
---|
175 | worldPhys,false,0); |
---|
176 | // G4PVPlacement *MedTg3d_Phys= |
---|
177 | new G4PVPlacement(0,G4ThreeVector( 7.5*m,0,0), |
---|
178 | "Target 3d",smallBoxLog, |
---|
179 | worldPhys,false,0); |
---|
180 | |
---|
181 | |
---|
182 | // 3) Eight small boxes around the origin of the world volume |
---|
183 | // (in +-X, +-Y & +-Z) |
---|
184 | // |
---|
185 | // G4PVPlacement *SmTg4a_Phys= |
---|
186 | new G4PVPlacement |
---|
187 | (0,G4ThreeVector( 0.3*m, 0.3*m,0.3*m), "Target 4a",tinyBoxLog, |
---|
188 | worldPhys,false,0); |
---|
189 | // G4PVPlacement *SmTg4b_Phys= |
---|
190 | new G4PVPlacement |
---|
191 | (0,G4ThreeVector( 0.3*m,-0.3*m,0.3*m), "Target 4b",tinyBoxLog, |
---|
192 | worldPhys,false,0); |
---|
193 | // G4PVPlacement *SmTg4c_Phys= |
---|
194 | new G4PVPlacement |
---|
195 | (0,G4ThreeVector(-0.3*m,-0.3*m,0.3*m), "Target 4c",tinyBoxLog, |
---|
196 | worldPhys,false,0); |
---|
197 | // G4PVPlacement *SmTg4d_Phys= |
---|
198 | new G4PVPlacement |
---|
199 | (0,G4ThreeVector(-0.3*m, 0.3*m,0.3*m), "Target 4d",tinyBoxLog, |
---|
200 | worldPhys,false,0); |
---|
201 | |
---|
202 | // G4PVPlacement *SmTg4e_Phys= |
---|
203 | new G4PVPlacement |
---|
204 | (0,G4ThreeVector( 0.3*m, 0.3*m,-0.3*m), "Target 4e",tinyBoxLog, |
---|
205 | worldPhys,false,0); |
---|
206 | // G4PVPlacement *SmTg4f_Phys= |
---|
207 | new G4PVPlacement |
---|
208 | (0,G4ThreeVector( 0.3*m,-0.3*m,-0.3*m), "Target 4f",tinyBoxLog, |
---|
209 | worldPhys,false,0); |
---|
210 | // G4PVPlacement *SmTg4g_Phys= |
---|
211 | new G4PVPlacement |
---|
212 | (0,G4ThreeVector(-0.3*m,-0.3*m,-0.3*m), "Target 4g",tinyBoxLog, |
---|
213 | worldPhys,false,0); |
---|
214 | // G4PVPlacement *SmTg4h_Phys= |
---|
215 | new G4PVPlacement |
---|
216 | (0,G4ThreeVector(-0.3*m, 0.3*m,-0.3*m), "Target 4h",tinyBoxLog, |
---|
217 | worldPhys,false,0); |
---|
218 | |
---|
219 | return worldPhys; |
---|
220 | } |
---|
221 | |
---|
222 | #include "G4ChordFinder.hh" |
---|
223 | #include "G4PropagatorInField.hh" |
---|
224 | #include "G4MagneticField.hh" |
---|
225 | #include "G4FieldManager.hh" |
---|
226 | #include "G4TransportationManager.hh" |
---|
227 | #include "G4HelixExplicitEuler.hh" |
---|
228 | #include "G4HelixSimpleRunge.hh" |
---|
229 | #include "G4HelixImplicitEuler.hh" |
---|
230 | #include "G4ExplicitEuler.hh" |
---|
231 | #include "G4ImplicitEuler.hh" |
---|
232 | #include "G4SimpleRunge.hh" |
---|
233 | #include "G4SimpleHeum.hh" |
---|
234 | #include "G4ClassicalRK4.hh" |
---|
235 | #include "G4Mag_SpinEqRhs.hh" |
---|
236 | #include "G4CashKarpRKF45.hh" |
---|
237 | #include "G4RKG3_Stepper.hh" |
---|
238 | |
---|
239 | G4UniformMagField myMagField(10.*tesla, 0., 0.); |
---|
240 | |
---|
241 | |
---|
242 | G4FieldManager* SetupField(G4int type) |
---|
243 | { |
---|
244 | G4FieldManager *pFieldMgr; |
---|
245 | G4ChordFinder *pChordFinder; |
---|
246 | G4Mag_SpinEqRhs *fEquation = new G4Mag_SpinEqRhs(&myMagField); |
---|
247 | G4MagIntegratorStepper *pStepper; |
---|
248 | |
---|
249 | const int ncompspin=12; |
---|
250 | |
---|
251 | switch ( type ) |
---|
252 | { |
---|
253 | case 0: pStepper = new G4ExplicitEuler( fEquation, ncompspin ); break; |
---|
254 | case 1: pStepper = new G4ImplicitEuler( fEquation, ncompspin ); break; |
---|
255 | case 2: pStepper = new G4SimpleRunge( fEquation, ncompspin ); break; |
---|
256 | case 3: pStepper = new G4SimpleHeum( fEquation, ncompspin ); break; |
---|
257 | case 4: pStepper = new G4ClassicalRK4( fEquation, ncompspin ); break; |
---|
258 | case 8: pStepper = new G4CashKarpRKF45( fEquation, ncompspin ); break; |
---|
259 | default: pStepper = new G4ClassicalRK4( fEquation, ncompspin ); break; |
---|
260 | } |
---|
261 | |
---|
262 | pFieldMgr= G4TransportationManager::GetTransportationManager()-> |
---|
263 | GetFieldManager(); |
---|
264 | |
---|
265 | pFieldMgr->SetDetectorField( &myMagField ); |
---|
266 | |
---|
267 | pChordFinder = new G4ChordFinder( &myMagField, |
---|
268 | 1.0e-2 * mm, |
---|
269 | pStepper); |
---|
270 | pChordFinder->SetVerbose(1); // ity(); |
---|
271 | |
---|
272 | pFieldMgr->SetChordFinder( pChordFinder ); |
---|
273 | |
---|
274 | return pFieldMgr; |
---|
275 | } |
---|
276 | |
---|
277 | G4PropagatorInField* SetupPropagator( G4int type) |
---|
278 | { |
---|
279 | // G4FieldManager* fieldMgr= |
---|
280 | SetupField( type) ; |
---|
281 | |
---|
282 | // G4ChordFinder theChordFinder( &MagField, 0.05*mm ); // Default stepper |
---|
283 | |
---|
284 | G4PropagatorInField *thePropagator = |
---|
285 | G4TransportationManager::GetTransportationManager()-> |
---|
286 | GetPropagatorInField (); |
---|
287 | |
---|
288 | // Let us test the new Minimum Epsilon Step functionality |
---|
289 | thePropagator -> SetMinimumEpsilonStep( 1.0e-7 ) ; |
---|
290 | thePropagator -> SetMaximumEpsilonStep( 1.0e-7 ) ; |
---|
291 | |
---|
292 | return thePropagator; |
---|
293 | } |
---|
294 | |
---|
295 | // This is Done only for this test program ... the transportation does it. |
---|
296 | // The method is now obsolete -- as propagator in Field has this method, |
---|
297 | // in order to message the correct field manager's chord finder. |
---|
298 | // |
---|
299 | void ObsoleteSetChargeMomentumMass(G4double charge, G4double MomentumXc, G4double Mass) |
---|
300 | { |
---|
301 | G4ChordFinder* pChordFinder; |
---|
302 | |
---|
303 | pChordFinder= G4TransportationManager::GetTransportationManager()-> |
---|
304 | GetFieldManager()->GetChordFinder(); |
---|
305 | |
---|
306 | pChordFinder->SetChargeMomentumMass( |
---|
307 | charge, // charge in e+ units |
---|
308 | MomentumXc, // Momentum in Mev/c ? |
---|
309 | Mass ); |
---|
310 | } |
---|
311 | |
---|
312 | G4PropagatorInField *pMagFieldPropagator; |
---|
313 | // |
---|
314 | // Test Stepping |
---|
315 | // |
---|
316 | G4bool testG4PropagatorInField(G4VPhysicalVolume*, // *pTopNode, |
---|
317 | G4int ) // type) |
---|
318 | { |
---|
319 | void report_endPV(G4ThreeVector Position, |
---|
320 | G4ThreeVector UnitVelocity, |
---|
321 | G4ThreeVector Spin, |
---|
322 | G4double step_len, |
---|
323 | G4double physStep, |
---|
324 | G4double safety, |
---|
325 | G4ThreeVector EndPosition, |
---|
326 | G4ThreeVector EndUnitVelocity, |
---|
327 | G4ThreeVector EndSpin, |
---|
328 | G4int Step, |
---|
329 | G4VPhysicalVolume* startVolume); |
---|
330 | |
---|
331 | G4UniformMagField MagField(10.*tesla, 0., 0.); // Tesla Defined ? |
---|
332 | G4TransportationManager* transpMgr = G4TransportationManager:: |
---|
333 | GetTransportationManager(); |
---|
334 | G4Navigator* pNavig= transpMgr-> GetNavigatorForTracking(); |
---|
335 | |
---|
336 | // pMagFieldPropagator= SetupPropagator(type); |
---|
337 | |
---|
338 | G4cout << "Test G4PropInFld with " |
---|
339 | << "optimise = " |
---|
340 | << ( pMagFieldPropagator->GetUseSafetyForOptimization() ? "on" : "off" ) |
---|
341 | // << " Eps min= " << pMagFieldPropagator->GetMinimumEpsilonStep() |
---|
342 | // << " & max= " << pMagFieldPropagator->GetMaximumEpsilonStep() |
---|
343 | << G4endl; |
---|
344 | |
---|
345 | const G4FieldManager* pFieldMgr= transpMgr->GetFieldManager(); |
---|
346 | G4cout << " The global field manager has the following parameters " |
---|
347 | << G4endl; |
---|
348 | G4cout << " Eps min= " << pFieldMgr->GetMinimumEpsilonStep() |
---|
349 | << " & max= " << pFieldMgr->GetMaximumEpsilonStep() |
---|
350 | << G4endl; |
---|
351 | G4cout << " Delta Intersection= " << pFieldMgr->GetDeltaIntersection() |
---|
352 | << " Delta One step = " << pFieldMgr->GetDeltaOneStep() |
---|
353 | << G4endl; |
---|
354 | |
---|
355 | |
---|
356 | pMagFieldPropagator->SetChargeMomentumMass( |
---|
357 | +1., // charge in e+ units |
---|
358 | 0.1*GeV, // Momentum in Mev/c ? |
---|
359 | 0.105658387*GeV ); |
---|
360 | // pNavig->SetWorldVolume(pTopNode); |
---|
361 | |
---|
362 | |
---|
363 | G4VPhysicalVolume *located; |
---|
364 | G4double step_len, physStep, safety; |
---|
365 | G4ThreeVector xHat(1,0,0),yHat(0,1,0),zHat(0,0,1); |
---|
366 | G4ThreeVector mxHat(-1,0,0),myHat(0,-1,0),mzHat(0,0,-1); |
---|
367 | |
---|
368 | // physStep=kInfinity; |
---|
369 | G4ThreeVector Position(0.,0.,0.); |
---|
370 | G4ThreeVector UnitMomentum(0.,0.6,0.8); |
---|
371 | G4ThreeVector EndPosition, EndUnitMomentum; |
---|
372 | |
---|
373 | // |
---|
374 | // Test location & Step computation |
---|
375 | // |
---|
376 | /* assert(located->GetName()=="World"); */ |
---|
377 | |
---|
378 | const G4double threshold= 1.e-6; |
---|
379 | |
---|
380 | if( std::fabs(UnitMomentum.mag() - 1.0) > threshold ) |
---|
381 | { |
---|
382 | G4cout << "UnitMomentum.mag() - 1.0 = " << UnitMomentum.mag() - 1.0 << |
---|
383 | G4endl; |
---|
384 | } |
---|
385 | |
---|
386 | G4cout << G4endl; |
---|
387 | |
---|
388 | for( int iparticle=0; iparticle < 2; iparticle++ ) |
---|
389 | { |
---|
390 | physStep= 2.5 * mm ; // millimeters |
---|
391 | Position = G4ThreeVector(0.,0.,0.) |
---|
392 | + iparticle * G4ThreeVector(0.2, 0.3, 0.4); |
---|
393 | // ->GetChordFinder().SetChargeAndMomentum( |
---|
394 | |
---|
395 | G4double momentum_val= (0.5+iparticle*1.0) * 0.1*GeV; // As energy/c |
---|
396 | G4double rest_mass = 0.105658387*GeV; // A muon |
---|
397 | |
---|
398 | G4double momentum_sq = momentum_val * momentum_val; |
---|
399 | G4double kineticEnergy = momentum_sq / |
---|
400 | ( std::sqrt( momentum_sq + rest_mass * rest_mass ) |
---|
401 | + rest_mass ); |
---|
402 | G4double labTof= 10.0*ns, properTof= 0.1*ns; |
---|
403 | pMagFieldPropagator->SetChargeMomentumMass( |
---|
404 | +1, // charge in e+ units |
---|
405 | momentum_val, |
---|
406 | rest_mass); |
---|
407 | |
---|
408 | UnitMomentum = (G4ThreeVector(0.,0.6,0.8) |
---|
409 | + (float)iparticle * G4ThreeVector(0.1, 0.2, 0.3)).unit(); |
---|
410 | G4double beta = momentum_val / std::sqrt( rest_mass*rest_mass + momentum_val*momentum_val ); |
---|
411 | G4double VelocityMag = beta * c_light; |
---|
412 | G4ThreeVector Velocity = VelocityMag * UnitMomentum ; |
---|
413 | |
---|
414 | G4cout << G4endl; |
---|
415 | G4cout << "Test PropagateMagField: ***********************" << G4endl |
---|
416 | << " Starting New Particle with Position " << Position << G4endl |
---|
417 | << " and UnitVelocity " << UnitMomentum << G4endl; |
---|
418 | G4cout << " Momentum in MeV/c is "<< (0.5+iparticle*1.0)*0.1*GeV/MeV; |
---|
419 | G4cout << G4endl; |
---|
420 | |
---|
421 | G4ThreeVector initialSpin = UnitMomentum; |
---|
422 | |
---|
423 | for( int istep=0; istep < 14; istep++ ){ |
---|
424 | // // G4cout << "UnitMomentum Magnitude is " << UnitMomentum.mag() << G4endl; |
---|
425 | located= pNavig->LocateGlobalPointAndSetup(Position); |
---|
426 | // Is the following better ?? It would need "changes" |
---|
427 | // located= pMagFieldPropagator->LocateGlobalPointAndSetup(Position); |
---|
428 | // G4cout << "Starting Step " << istep << " in volume " |
---|
429 | // << located->GetName() << G4endl; |
---|
430 | |
---|
431 | // G4FieldTrack stateVec( Position, Velocity, 0.0, 0.0, |
---|
432 | // 0.0, 0.0, &initialSpin ); |
---|
433 | |
---|
434 | G4FieldTrack stateVec( Position, |
---|
435 | UnitMomentum, |
---|
436 | 0.0, // starting S curve len |
---|
437 | kineticEnergy, |
---|
438 | rest_mass, |
---|
439 | VelocityMag, |
---|
440 | labTof, |
---|
441 | properTof, |
---|
442 | &initialSpin |
---|
443 | ); |
---|
444 | |
---|
445 | step_len=pMagFieldPropagator->ComputeStep( stateVec, |
---|
446 | physStep, safety |
---|
447 | ,located); |
---|
448 | // -------------------- |
---|
449 | EndPosition= pMagFieldPropagator->EndPosition(); |
---|
450 | EndUnitMomentum= pMagFieldPropagator->EndMomentumDir(); |
---|
451 | // -------- |
---|
452 | G4FieldTrack EndFieldTrack= pMagFieldPropagator->GetEndState(); |
---|
453 | G4ThreeVector EndSpin= EndFieldTrack.GetSpin(); |
---|
454 | G4ThreeVector EndUnitMomentum = EndFieldTrack.GetMomentumDir(); |
---|
455 | |
---|
456 | // G4cout << " EndPosition " << EndPosition << G4endl; |
---|
457 | // G4cout << " EndUnitMomentum " << EndUnitMomentum << G4endl; |
---|
458 | // G4cout << " initialSpin " << initialSpin.mag() << G4endl; |
---|
459 | // G4cout << " EndSpin " << EndSpin.mag() << G4endl; |
---|
460 | |
---|
461 | if( std::fabs(EndUnitMomentum.mag2() - 1.0) > threshold ) |
---|
462 | G4cout << "EndUnitMomentum.mag2() - 1.0 = " << |
---|
463 | EndUnitMomentum.mag2() - 1.0 << G4endl; |
---|
464 | |
---|
465 | // In this case spin should be parallel (equal) to momentum |
---|
466 | G4double magdiff= (EndUnitMomentum - EndSpin).mag(); |
---|
467 | if( magdiff > 1.e-8 ){ |
---|
468 | G4cout.precision(4); |
---|
469 | G4cout << " Spin is not equal to Momentum " |
---|
470 | << " Diff = " << magdiff << G4endl; |
---|
471 | } |
---|
472 | |
---|
473 | G4ThreeVector MoveVec = EndPosition - Position; |
---|
474 | assert( MoveVec.mag() < physStep*(1.+1.e-9) ); |
---|
475 | |
---|
476 | // G4cout << " testPropagatorInField: After stepI " << istep << " : " << G4endl; |
---|
477 | report_endPV(Position, UnitMomentum, initialSpin, step_len, physStep, safety, |
---|
478 | EndPosition, EndUnitMomentum, EndSpin, istep, located ); |
---|
479 | |
---|
480 | assert(safety>=0); |
---|
481 | pNavig->SetGeometricallyLimitedStep(); |
---|
482 | // pMagFieldPropagator->SetGeometricallyLimitedStep(); |
---|
483 | |
---|
484 | Position= EndPosition; |
---|
485 | UnitMomentum= EndUnitMomentum; |
---|
486 | initialSpin = EndSpin; |
---|
487 | |
---|
488 | physStep *= 2.; |
---|
489 | } // ........................... end for ( istep ) |
---|
490 | } // .............................. end for ( iparticle ) |
---|
491 | |
---|
492 | return(1); |
---|
493 | } |
---|
494 | |
---|
495 | void report_endPV(G4ThreeVector Position, |
---|
496 | G4ThreeVector, // UnitVelocity, |
---|
497 | G4ThreeVector, // Spin, |
---|
498 | G4double step_len, |
---|
499 | G4double physStep, |
---|
500 | G4double safety, |
---|
501 | G4ThreeVector EndPosition, |
---|
502 | G4ThreeVector EndUnitVelocity, |
---|
503 | G4ThreeVector EndSpin, |
---|
504 | G4int Step, |
---|
505 | G4VPhysicalVolume* startVolume) |
---|
506 | // G4VPhysicalVolume* endVolume) |
---|
507 | { |
---|
508 | const G4int verboseLevel=1; |
---|
509 | G4int oldPrec= G4cout.precision(4); |
---|
510 | |
---|
511 | if( Step == 0 && verboseLevel <= 3 ) |
---|
512 | { |
---|
513 | // G4cout.precision(6); |
---|
514 | // G4cout.setf(ios_base::fixed,ios_base::floatfield); |
---|
515 | G4cout << std::setw( 3) << "Stp#" << " " |
---|
516 | << std::setw( 7) << "X(mm)" << " " |
---|
517 | << std::setw( 7) << "Y(mm)" << " " |
---|
518 | << std::setw( 7) << "Z(mm)" << " " |
---|
519 | << std::setw( 7) << " N_x " << " " |
---|
520 | << std::setw( 7) << " N_y " << " " |
---|
521 | << std::setw( 7) << " N_z " << " " |
---|
522 | << std::setw( 7) << " S_x " << " " |
---|
523 | << std::setw( 7) << " S_y " << " " |
---|
524 | << std::setw( 7) << " S_z " << " " |
---|
525 | << std::setw( 9) << " |S-N|" << " " |
---|
526 | << std::setw( 9) << " (S_z-N_z) " << " " |
---|
527 | // << std::setw( 9) << "KinE(MeV)" << " " |
---|
528 | // << std::setw( 9) << "dE(MeV)" << " " |
---|
529 | << std::setw( 9) << "StepLen" << " " |
---|
530 | << std::setw( 9) << "PhsStep" << " " |
---|
531 | << std::setw( 9) << "Safety" << " " |
---|
532 | << std::setw(18) << "NextVolume" << " " |
---|
533 | << G4endl; |
---|
534 | } |
---|
535 | // |
---|
536 | // |
---|
537 | if( verboseLevel > 3 ) |
---|
538 | { |
---|
539 | G4cout << "End Position is " << EndPosition << G4endl |
---|
540 | << " and UnitVelocity is " << EndUnitVelocity << G4endl; |
---|
541 | G4cout << "Step taken was " << step_len |
---|
542 | << " out of PhysicalStep= " << physStep << G4endl; |
---|
543 | G4cout << "Final safety is: " << safety << G4endl; |
---|
544 | |
---|
545 | G4cout << "Chord length = " << (EndPosition-Position).mag() << G4endl; |
---|
546 | G4cout << G4endl; |
---|
547 | } |
---|
548 | else // if( verboseLevel > 0 ) |
---|
549 | { |
---|
550 | G4cout.precision(3); // 4 ? |
---|
551 | G4cout << std::setw( 3) << Step << " " |
---|
552 | << std::setw( 7) << Position.x() << " " |
---|
553 | << std::setw( 7) << Position.y() << " " |
---|
554 | << std::setw( 7) << Position.z() << " " |
---|
555 | << std::setw( 7) << EndUnitVelocity.x() << " " |
---|
556 | << std::setw( 7) << EndUnitVelocity.y() << " " |
---|
557 | << std::setw( 7) << EndUnitVelocity.z() << " " |
---|
558 | << std::setw( 7) << EndSpin.x() << " " |
---|
559 | << std::setw( 7) << EndSpin.y() << " " |
---|
560 | << std::setw( 7) << EndSpin.z() << " "; |
---|
561 | G4cout.precision(2); |
---|
562 | G4cout << std::setw( 8) << (EndSpin-EndUnitVelocity).mag() << " " |
---|
563 | << std::setw( 8) << EndSpin.z() - EndUnitVelocity.z() << " "; |
---|
564 | // << std::setw( 9) << KineticEnergy << " " |
---|
565 | // << std::setw( 9) << EnergyDifference << " " |
---|
566 | G4cout.precision(6); |
---|
567 | G4cout << std::setw( 9) << step_len << " " |
---|
568 | << std::setw( 9) << physStep << " "; |
---|
569 | G4cout.precision(3); // could be 4 ? |
---|
570 | G4cout << std::setw( 9) << safety << " "; |
---|
571 | if( startVolume != 0) { |
---|
572 | G4cout << std::setw(12) << startVolume->GetName() << " "; |
---|
573 | } else { |
---|
574 | G4cout << std::setw(12) << "OutOfWorld" << " "; |
---|
575 | } |
---|
576 | |
---|
577 | #if 0 |
---|
578 | if( endVolume != 0) { |
---|
579 | G4cout << std::setw(12) << endVolume()->GetName() << " "; |
---|
580 | } else { |
---|
581 | G4cout << std::setw(12) << "OutOfWorld" << " "; |
---|
582 | } |
---|
583 | #endif |
---|
584 | G4cout << G4endl; |
---|
585 | } |
---|
586 | |
---|
587 | G4cout.precision(oldPrec); |
---|
588 | } |
---|
589 | |
---|
590 | // Main program |
---|
591 | // ------------------------------- |
---|
592 | int main(int argc, char **argv) |
---|
593 | { |
---|
594 | G4VPhysicalVolume *myTopNode; |
---|
595 | G4int type, optim; |
---|
596 | G4bool optimise=true; |
---|
597 | |
---|
598 | type = 8 ; |
---|
599 | |
---|
600 | if( argc >= 2 ) |
---|
601 | type = atoi(argv[1]); |
---|
602 | |
---|
603 | if( argc >=3 ){ |
---|
604 | optim= atoi(argv[2]); |
---|
605 | if( optim == 0 ) { optimise = false; } |
---|
606 | } |
---|
607 | |
---|
608 | G4cout << " Testing with stepper number " << type; |
---|
609 | G4cout << " and PiF safety optimisation " ; |
---|
610 | if (optimise) G4cout << "on"; |
---|
611 | else G4cout << "off"; |
---|
612 | G4cout << G4endl; |
---|
613 | |
---|
614 | // Create the geometry & field |
---|
615 | myTopNode=BuildGeometry(); // Build the geometry |
---|
616 | |
---|
617 | G4Navigator *pNavig= G4TransportationManager:: |
---|
618 | GetTransportationManager()-> GetNavigatorForTracking(); |
---|
619 | pNavig->SetWorldVolume(myTopNode); |
---|
620 | |
---|
621 | G4GeometryManager::GetInstance()->CloseGeometry(false); |
---|
622 | |
---|
623 | // Setup the propagator (will be overwritten by testG4Propagator ...) |
---|
624 | pMagFieldPropagator= SetupPropagator(type); |
---|
625 | G4cout << " Using default values for " |
---|
626 | << " Min Eps = " << pMagFieldPropagator->GetMinimumEpsilonStep() |
---|
627 | << " and " |
---|
628 | << " MaxEps = " << pMagFieldPropagator->GetMaximumEpsilonStep() |
---|
629 | << G4endl; |
---|
630 | |
---|
631 | pMagFieldPropagator->SetUseSafetyForOptimization(optimise); |
---|
632 | |
---|
633 | // Do the tests without voxels |
---|
634 | G4cout << " Test with no voxels" << G4endl; |
---|
635 | testG4PropagatorInField(myTopNode, type); |
---|
636 | |
---|
637 | // Repeat tests but with full voxels |
---|
638 | G4cout << " Test with full voxels" << G4endl; |
---|
639 | |
---|
640 | G4GeometryManager::GetInstance()->OpenGeometry(); |
---|
641 | G4GeometryManager::GetInstance()->CloseGeometry(true); |
---|
642 | |
---|
643 | testG4PropagatorInField(myTopNode, type); |
---|
644 | |
---|
645 | G4GeometryManager::GetInstance()->OpenGeometry(); |
---|
646 | |
---|
647 | G4cout << G4endl |
---|
648 | << "----------------------------------------------------------" |
---|
649 | << G4endl; |
---|
650 | |
---|
651 | // Repeat tests with full voxels and modified parameters |
---|
652 | G4cout << "Test with more accurate parameters " << G4endl; |
---|
653 | |
---|
654 | G4double maxEpsStep= 0.001; |
---|
655 | G4double minEpsStep= 2.5e-8; |
---|
656 | G4cout << " Setting values for Min Eps = " << minEpsStep |
---|
657 | << " and MaxEps = " << maxEpsStep << G4endl; |
---|
658 | |
---|
659 | pMagFieldPropagator->SetMaximumEpsilonStep(maxEpsStep); |
---|
660 | pMagFieldPropagator->SetMinimumEpsilonStep(minEpsStep); |
---|
661 | |
---|
662 | G4GeometryManager::GetInstance()->OpenGeometry(); |
---|
663 | G4GeometryManager::GetInstance()->CloseGeometry(true); |
---|
664 | |
---|
665 | testG4PropagatorInField(myTopNode, type); |
---|
666 | |
---|
667 | G4GeometryManager::GetInstance()->OpenGeometry(); |
---|
668 | |
---|
669 | optimise = ! optimise; |
---|
670 | // Repeat tests but with the opposite optimisation choice |
---|
671 | G4cout << " Now test with safety optimisation " ; |
---|
672 | if (optimise) G4cout << "on"; |
---|
673 | else G4cout << "off"; |
---|
674 | G4cout << G4endl; |
---|
675 | |
---|
676 | pMagFieldPropagator->SetUseSafetyForOptimization(optimise); |
---|
677 | testG4PropagatorInField(myTopNode, type); |
---|
678 | |
---|
679 | G4GeometryManager::GetInstance()->OpenGeometry(); |
---|
680 | |
---|
681 | return 0; |
---|
682 | } |
---|
683 | |
---|