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a9e2aefa | 1 | /************************************************************************** |
2 | * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. * | |
0c527060 | 3 | * * |
a9e2aefa | 4 | * Author: The ALICE Off-line Project. * |
5 | * Contributors are mentioned in the code where appropriate. * | |
6 | * * | |
7 | * Permission to use, copy, modify and distribute this software and its * | |
8 | * documentation strictly for non-commercial purposes is hereby granted * | |
9 | * without fee, provided that the above copyright notice appears in all * | |
10 | * copies and that both the copyright notice and this permission notice * | |
11 | * appear in the supporting documentation. The authors make no claims * | |
2c799aa2 | 12 | * about the suitability of this software for any purpeateose. It is * |
a9e2aefa | 13 | * provided "as is" without express or implied warranty. * |
14 | **************************************************************************/ | |
15 | ||
88cb7938 | 16 | /* $Id$ */ |
a9e2aefa | 17 | |
3d1463c8 | 18 | //----------------------------------------------------------------------------- |
d19b6003 | 19 | // Class AliMUONv1 |
20 | // -------------------- | |
21 | // AliDetector class for MUON subsystem which implements | |
22 | // functions for simulation | |
3d1463c8 | 23 | //----------------------------------------------------------------------------- |
acc838fd | 24 | |
30178c30 | 25 | #include "AliMUONv1.h" |
88cb7938 | 26 | #include "AliMUONConstants.h" |
b7ef3c96 | 27 | #include "AliMUONResponseFactory.h" |
a9e2aefa | 28 | #include "AliMUONHit.h" |
d4bb94a1 | 29 | #include "AliMUONGeometryBuilder.h" |
b7ef3c96 | 30 | #include "AliMUONGeometry.h" |
31 | #include "AliMUONGeometryTransformer.h" | |
e118b27e | 32 | #include "AliMUONGeometryModule.h" |
7ecf374b | 33 | #include "AliMUONStringIntMap.h" |
e118b27e | 34 | #include "AliMUONGeometryDetElement.h" |
7ecf374b | 35 | |
331a617a | 36 | #include "AliMpCDB.h" |
273e54a3 | 37 | #include "AliMpDEManager.h" |
38 | ||
7ecf374b | 39 | #include "AliConst.h" |
88cb7938 | 40 | #include "AliMagF.h" |
41 | #include "AliRun.h" | |
5d12ce38 | 42 | #include "AliMC.h" |
d95fe39e | 43 | #include "AliTrackReference.h" |
8c343c7c | 44 | #include "AliLog.h" |
a9e2aefa | 45 | |
f7a1cc68 | 46 | #include <TClonesArray.h> |
7ecf374b | 47 | #include <TF1.h> |
d7d39669 | 48 | #include <TF2.h> |
f7a1cc68 | 49 | #include <TGeoGlobalMagField.h> |
50 | #include <TGeoMatrix.h> | |
51 | #include <TRandom.h> | |
7ecf374b | 52 | #include <TRandom.h> |
53 | #include <TVirtualMC.h> | |
7ecf374b | 54 | |
edee5e63 | 55 | #include <string> |
56 | ||
bb2bab35 | 57 | #include "AliMUONVHitStore.h" |
58 | ||
5398f946 | 59 | /// \cond CLASSIMP |
a9e2aefa | 60 | ClassImp(AliMUONv1) |
5398f946 | 61 | /// \endcond |
a9e2aefa | 62 | |
63 | //___________________________________________ | |
30178c30 | 64 | AliMUONv1::AliMUONv1() |
65 | : AliMUON(), | |
d4bb94a1 | 66 | fAngleEffect(kTRUE), |
d7d39669 | 67 | fMagEffect(kTRUE), |
d4bb94a1 | 68 | fStepMaxInActiveGas(0.6), |
69 | fStepSum(0x0), | |
70 | fDestepSum(0x0), | |
71 | fTrackMomentum(), | |
72 | fTrackPosition(), | |
73 | fElossRatio(0x0), | |
74 | fAngleEffect10(0x0), | |
d7d39669 | 75 | fAngleEffectNorma(0x0), |
76 | fMagAngleEffectNorma(0x0) | |
a9e2aefa | 77 | { |
d19b6003 | 78 | /// Default constructor |
79 | ||
80 | AliDebug(1,Form("default (empty) ctor this=%p",this)); | |
1391e633 | 81 | } |
d4bb94a1 | 82 | |
a9e2aefa | 83 | //___________________________________________ |
9bf406e1 | 84 | AliMUONv1::AliMUONv1(const char *name, const char* title) |
85 | : AliMUON(name, title), | |
d4bb94a1 | 86 | fAngleEffect(kTRUE), |
d7d39669 | 87 | fMagEffect(kTRUE), |
d4bb94a1 | 88 | fStepMaxInActiveGas(0.6), |
89 | fStepSum(0x0), | |
90 | fDestepSum(0x0), | |
91 | fTrackMomentum(), | |
92 | fTrackPosition(), | |
93 | fElossRatio(0x0), | |
94 | fAngleEffect10(0x0), | |
d7d39669 | 95 | fAngleEffectNorma(0x0), |
96 | fMagAngleEffectNorma(0x0) | |
a9e2aefa | 97 | { |
d19b6003 | 98 | /// Standard onstructor |
d4bb94a1 | 99 | |
d19b6003 | 100 | AliDebug(1,Form("ctor this=%p",this)); |
edee5e63 | 101 | |
331a617a | 102 | // Load mapping |
103 | if ( ! AliMpCDB::LoadMpSegmentation() ) { | |
104 | AliFatal("Could not access mapping from OCDB !"); | |
105 | } | |
106 | ||
ba030c0e | 107 | // By default include all stations |
c33d9661 | 108 | |
1391e633 | 109 | fStepSum = new Float_t [AliMUONConstants::NCh()]; |
110 | fDestepSum = new Float_t [AliMUONConstants::NCh()]; | |
111 | for (Int_t i=0; i<AliMUONConstants::NCh(); i++) { | |
112 | fStepSum[i] =0.0; | |
113 | fDestepSum[i]=0.0; | |
114 | } | |
115 | // Ratio of particle mean eloss with respect MIP's Khalil Boudjemline, sep 2003, PhD.Thesis and Particle Data Book | |
116 | fElossRatio = new TF1("ElossRatio","[0]+[1]*x+[2]*x*x+[3]*x*x*x+[4]*x*x*x*x",0.5,5.); | |
117 | fElossRatio->SetParameter(0,1.02138); | |
118 | fElossRatio->SetParameter(1,-9.54149e-02); | |
119 | fElossRatio->SetParameter(2,+7.83433e-02); | |
120 | fElossRatio->SetParameter(3,-9.98208e-03); | |
121 | fElossRatio->SetParameter(4,+3.83279e-04); | |
122 | ||
123 | // Angle effect in tracking chambers at theta =10 degres as a function of ElossRatio (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis) (in micrometers) | |
124 | fAngleEffect10 = new TF1("AngleEffect10","[0]+[1]*x+[2]*x*x",0.5,3.0); | |
125 | fAngleEffect10->SetParameter(0, 1.90691e+02); | |
126 | fAngleEffect10->SetParameter(1,-6.62258e+01); | |
127 | fAngleEffect10->SetParameter(2,+1.28247e+01); | |
128 | // Angle effect: Normalisation form theta=10 degres to theta between 0 and 10 (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis) | |
129 | // Angle with respect to the wires assuming that chambers are perpendicular to the z axis. | |
130 | fAngleEffectNorma = new TF1("AngleEffectNorma","[0]+[1]*x+[2]*x*x+[3]*x*x*x",0.0,10.0); | |
131 | fAngleEffectNorma->SetParameter(0,4.148); | |
132 | fAngleEffectNorma->SetParameter(1,-6.809e-01); | |
133 | fAngleEffectNorma->SetParameter(2,5.151e-02); | |
134 | fAngleEffectNorma->SetParameter(3,-1.490e-03); | |
d7d39669 | 135 | |
136 | // Magnetic field effect: Normalisation form theta=16 degres (eq. 10 degrees B=0) to theta between -20 and 20 (Lamia Benhabib jun 2006 ) | |
137 | // Angle with respect to the wires assuming that chambers are perpendicular to the z axis. | |
138 | fMagAngleEffectNorma = new TF2("MagAngleEffectNorma","121.24/(([1]+[2]*abs(y))+[3]*abs(x-[0]*y)+[4]*abs((x-[0]*y)*(x-[0]*y))+[5]*abs((x-[0]*y)*(x-[0]*y)*(x-[0]*y))+[6]*abs((x-[0]*y)*(x-[0]*y)*(x-[0]*y)*(x-[0]*y)))",-20.0,20.0,-1.,1.); | |
139 | fMagAngleEffectNorma->SetParameters(8.6995, 25.4022, 13.8822, 2.4717, 1.1551, -0.0624, 0.0012); | |
a9e2aefa | 140 | } |
141 | ||
142 | //___________________________________________ | |
acc838fd | 143 | AliMUONv1::~AliMUONv1() |
a9e2aefa | 144 | { |
d19b6003 | 145 | /// Destructor |
146 | ||
147 | AliDebug(1,Form("dtor this=%p",this)); | |
d4bb94a1 | 148 | delete [] fStepSum; |
149 | delete [] fDestepSum; | |
150 | delete fElossRatio; | |
151 | delete fAngleEffect10; | |
8109731a | 152 | delete fAngleEffectNorma; |
d7d39669 | 153 | delete fMagAngleEffectNorma; |
acc838fd | 154 | } |
b17c0c87 | 155 | |
acc838fd | 156 | //__________________________________________________ |
157 | void AliMUONv1::CreateGeometry() | |
158 | { | |
d19b6003 | 159 | /// Construct geometry using geometry builder |
a9e2aefa | 160 | |
d4bb94a1 | 161 | fGeometryBuilder->CreateGeometry(); |
acc838fd | 162 | } |
a9e2aefa | 163 | |
acc838fd | 164 | //________________________________________________________________ |
a9e2aefa | 165 | void AliMUONv1::CreateMaterials() |
166 | { | |
d19b6003 | 167 | /// Construct materials using geometry builder |
acc838fd | 168 | |
d4bb94a1 | 169 | fGeometryBuilder->CreateMaterials(); |
a9e2aefa | 170 | } |
171 | ||
450ca6fb | 172 | //________________________________________________________________ |
173 | void AliMUONv1::UpdateInternalGeometry() | |
174 | { | |
175 | /// Update geometry after applying mis-alignment | |
176 | ||
008b1449 | 177 | // Load mapping |
178 | if ( ! AliMpCDB::LoadMpSegmentation() ) { | |
179 | AliFatal("Could not access mapping from OCDB !"); | |
180 | } | |
181 | ||
450ca6fb | 182 | fGeometryBuilder->UpdateInternalGeometry(); |
183 | } | |
184 | ||
c28b5041 | 185 | //________________________________________________________________ |
186 | void AliMUONv1::AddAlignableVolumes() const | |
187 | { | |
188 | /// Construct materials using geometry builder | |
189 | ||
190 | GetGeometryTransformer()->AddAlignableVolumes(); | |
191 | } | |
192 | ||
193 | ||
acc838fd | 194 | //___________________________________________ |
a9e2aefa | 195 | void AliMUONv1::Init() |
a713db22 | 196 | { |
d19b6003 | 197 | /// Initialize geometry |
198 | ||
edee5e63 | 199 | AliDebug(1,"Start Init for version 1 - CPC chamber type"); |
002920d1 | 200 | |
edee5e63 | 201 | fGeometryBuilder->InitGeometry(); |
202 | AliDebug(1,"Finished Init for version 1 - CPC chamber type"); | |
b7ef3c96 | 203 | |
204 | ||
b7ef3c96 | 205 | // Build segmentation |
206 | // using geometry parametrisation | |
207 | // | |
b7ef3c96 | 208 | // Build response |
edee5e63 | 209 | // |
43d7561d | 210 | AliMUONResponseFactory respFactory("default", fIsTailEffect); |
b7ef3c96 | 211 | respFactory.Build(this); |
212 | ||
a9e2aefa | 213 | } |
1391e633 | 214 | |
d4bb94a1 | 215 | //__________________________________________________________________ |
273e54a3 | 216 | Int_t AliMUONv1::GetGeomModuleId(Int_t volId) const |
d4bb94a1 | 217 | { |
d19b6003 | 218 | /// Check if the volume with specified volId is a sensitive volume (gas) |
5398f946 | 219 | /// of some chamber and return the chamber number; |
d19b6003 | 220 | /// if not sensitive volume - return 0. |
d4bb94a1 | 221 | |
273e54a3 | 222 | for (Int_t i = 0; i < AliMUONConstants::NGeomModules(); i++) { |
b7ef3c96 | 223 | if ( GetGeometry()->GetModule(i)->IsSensitiveVolume(volId) ) |
273e54a3 | 224 | return i; |
b7ef3c96 | 225 | } |
d4bb94a1 | 226 | |
273e54a3 | 227 | return -1; |
d4bb94a1 | 228 | } |
333f7cda | 229 | |
230 | //_______________________________________________________________________________ | |
231 | TString AliMUONv1::CurrentVolumePath() const | |
232 | { | |
d19b6003 | 233 | /// Return current volume path |
234 | /// (Could be removed when this function is available via gMC) | |
333f7cda | 235 | |
236 | TString path = ""; | |
237 | TString name; | |
238 | Int_t copyNo; | |
239 | Int_t imother = 0; | |
240 | do { | |
241 | name = gMC->CurrentVolOffName(imother); | |
242 | gMC->CurrentVolOffID(imother++, copyNo); | |
243 | TString add = "/"; | |
244 | add += name; | |
7ecf374b | 245 | add += "_"; |
333f7cda | 246 | add += copyNo; |
247 | path.Insert(0,add); | |
248 | } | |
249 | while ( name != TString("ALIC") ); | |
250 | ||
251 | return path; | |
252 | } | |
253 | ||
1391e633 | 254 | //_______________________________________________________________________________ |
c33d9661 | 255 | void AliMUONv1::StepManager() |
256 | { | |
d19b6003 | 257 | /// Step manager for the chambers |
c33d9661 | 258 | |
259 | // Only charged tracks | |
d59b2ec3 | 260 | if( !(gMC->TrackCharge()) ) return; |
1391e633 | 261 | // Only charged tracks |
262 | ||
c33d9661 | 263 | // Only gas gap inside chamber |
264 | // Tag chambers and record hits when track enters | |
d95fe39e | 265 | static Int_t idvol=-1, iEnter = 0; |
1391e633 | 266 | Int_t copy; |
267 | const Float_t kBig = 1.e10; | |
d95fe39e | 268 | static Double_t xyzEnter[3]; |
acc838fd | 269 | |
270 | // | |
271 | // Only gas gap inside chamber | |
272 | // Tag chambers and record hits when track enters | |
273e54a3 | 273 | Int_t id=gMC->CurrentVolID(copy); |
274 | Int_t iGeomModule = GetGeomModuleId(id); | |
275 | if (iGeomModule == -1) return; | |
acc838fd | 276 | |
d95fe39e | 277 | // Detection elements id |
278 | const AliMUONGeometryModule* kGeometryModule | |
273e54a3 | 279 | = GetGeometry()->GetModule(iGeomModule); |
d95fe39e | 280 | AliMUONGeometryDetElement* detElement |
281 | = kGeometryModule->FindBySensitiveVolume(CurrentVolumePath()); | |
273e54a3 | 282 | |
283 | if (!detElement && iGeomModule < AliMUONConstants::NGeomModules()-2) { | |
284 | iGeomModule++; | |
285 | const AliMUONGeometryModule* kGeometryModule2 | |
286 | = GetGeometry()->GetModule(iGeomModule); | |
287 | detElement | |
288 | = kGeometryModule2->FindBySensitiveVolume(CurrentVolumePath()); | |
289 | } | |
374ebd7d | 290 | |
d95fe39e | 291 | Int_t detElemId = 0; |
292 | if (detElement) detElemId = detElement->GetUniqueID(); | |
333f7cda | 293 | |
d95fe39e | 294 | if (!detElemId) { |
273e54a3 | 295 | AliErrorStream() |
296 | << "Geometry module id: " | |
297 | << setw(3) << iGeomModule << " " | |
d95fe39e | 298 | << "Current SV: " |
299 | << CurrentVolumePath() | |
300 | << " detElemId: " | |
301 | << setw(5) << detElemId | |
302 | << endl; | |
303 | Double_t x, y, z; | |
304 | gMC->TrackPosition(x, y, z); | |
273e54a3 | 305 | AliErrorStream() |
306 | << " global position: " | |
d95fe39e | 307 | << x << ", " << y << ", " << z |
308 | << endl; | |
273e54a3 | 309 | AliErrorStream() << "DetElemId not identified." << endl; |
310 | } | |
311 | ||
312 | Int_t iChamber = AliMpDEManager::GetChamberId(detElemId) + 1; | |
313 | idvol = iChamber -1; | |
333f7cda | 314 | |
d59b2ec3 | 315 | // Filling TrackRefs file for MUON. Our Track references are the active volume of the chambers |
d95fe39e | 316 | if ( (gMC->IsTrackEntering() || gMC->IsTrackExiting() ) ) { |
317 | AliTrackReference* trackReference | |
e6add757 | 318 | = AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kMUON); |
d95fe39e | 319 | trackReference->SetUserId(detElemId); |
320 | } | |
d59b2ec3 | 321 | |
d95fe39e | 322 | if( gMC->IsTrackEntering() ) { |
d59b2ec3 | 323 | Float_t theta = fTrackMomentum.Theta(); |
d631bec8 | 324 | if ( fIsMaxStep && (TMath::Pi()-theta)*kRaddeg>=15. ) { |
325 | gMC->SetMaxStep(fStepMaxInActiveGas); // We use Pi-theta because z is negative | |
326 | } | |
c5ce4e69 | 327 | iEnter = 1; |
328 | gMC->TrackPosition(xyzEnter[0], xyzEnter[1], xyzEnter[2]); // save coordinates of entrance point | |
d59b2ec3 | 329 | } |
330 | ||
5a0e88a7 | 331 | // AliDebug(1, |
332 | // Form("Active volume found %d chamber %d Z chamber is %f ",idvol,iChamber, | |
333 | // ( (AliMUONChamber*)(*fChambers)[idvol])->Z())) ; | |
d59b2ec3 | 334 | // Particule id and mass, |
335 | Int_t ipart = gMC->TrackPid(); | |
336 | Float_t mass = gMC->TrackMass(); | |
337 | ||
338 | fDestepSum[idvol]+=gMC->Edep(); | |
339 | // Get current particle id (ipart), track position (pos) and momentum (mom) | |
340 | if ( fStepSum[idvol]==0.0 ) gMC->TrackMomentum(fTrackMomentum); | |
341 | fStepSum[idvol]+=gMC->TrackStep(); | |
342 | ||
5a0e88a7 | 343 | // if (AliDebugLevel()) { |
344 | // AliDebug(1,Form("Step, iChamber %d, Particle %d, theta %f phi %f mass %f StepSum %f eloss %g", | |
345 | // iChamber,ipart, fTrackMomentum.Theta()*kRaddeg, fTrackMomentum.Phi()*kRaddeg, | |
346 | // mass, fStepSum[idvol], gMC->Edep())); | |
347 | // AliDebug(1,Form("Step:Track Momentum %f %f %f", fTrackMomentum.X(), fTrackMomentum.Y(), | |
348 | // fTrackMomentum.Z())); | |
349 | // gMC->TrackPosition(fTrackPosition); | |
350 | // AliDebug(1,Form("Step: Track Position %f %f %f",fTrackPosition.X(), | |
351 | // fTrackPosition.Y(),fTrackPosition.Z())) ; | |
352 | //} | |
d59b2ec3 | 353 | |
354 | // Track left chamber or StepSum larger than fStepMaxInActiveGas | |
355 | if ( gMC->IsTrackExiting() || | |
356 | gMC->IsTrackStop() || | |
357 | gMC->IsTrackDisappeared()|| | |
358 | (fStepSum[idvol]>fStepMaxInActiveGas) ) { | |
359 | ||
d631bec8 | 360 | if ( fIsMaxStep && |
361 | ( gMC->IsTrackExiting() || | |
362 | gMC->IsTrackStop() || | |
363 | gMC->IsTrackDisappeared() ) ) gMC->SetMaxStep(kBig); | |
c5ce4e69 | 364 | if (fDestepSum[idvol] == 0) { |
365 | // AZ - no energy release | |
366 | fStepSum[idvol] = 0; // Reset for the next event | |
367 | iEnter = 0; | |
368 | return; | |
369 | } | |
d59b2ec3 | 370 | |
371 | gMC->TrackPosition(fTrackPosition); | |
372 | Float_t theta = fTrackMomentum.Theta(); | |
373 | Float_t phi = fTrackMomentum.Phi(); | |
374 | ||
795b3f56 | 375 | Int_t merge = 0; |
376 | Double_t xyz0[3]={0}, xyz1[3]={0}, tmp[3]={0}; | |
c5ce4e69 | 377 | if (gMC->IsTrackExiting() && iEnter != 0) { |
378 | // AZ - this code is to avoid artificial hit splitting at the | |
379 | // "fake" boundary inside the same chamber. It will still produce | |
380 | // 2 hits but with the same coordinates (at the wire) to allow | |
381 | // their merging at the digitization level. | |
382 | ||
383 | // Only for a track going from the entrance to the exit from the volume | |
384 | // Get local coordinates | |
c5ce4e69 | 385 | gMC->Gmtod(xyzEnter, xyz0, 1); // local coord. at the entrance |
386 | ||
387 | fTrackPosition.Vect().GetXYZ(tmp); | |
388 | gMC->Gmtod(tmp, xyz1, 1); // local coord. at the exit | |
795b3f56 | 389 | Float_t dx = xyz0[0] - xyz1[0]; |
390 | Float_t dy = xyz0[1] - xyz1[1]; | |
391 | Float_t thLoc = TMath::ATan2 (TMath::Sqrt(dx*dx+dy*dy), TMath::Abs(xyz0[2]-xyz1[2])); | |
392 | if (thLoc * TMath::RadToDeg() < 15) merge = 1; | |
393 | } | |
c5ce4e69 | 394 | |
795b3f56 | 395 | if (merge) { |
c5ce4e69 | 396 | Double_t dz = -0.5; |
397 | if (xyz1[2] != xyz0[2]) dz = xyz0[2] / (xyz1[2] - xyz0[2]); | |
398 | tmp[0] = xyz0[0] - (xyz1[0] - xyz0[0]) * dz; // local coord. at the wire | |
399 | tmp[1] = xyz0[1] - (xyz1[1] - xyz0[1]) * dz; | |
400 | tmp[2] = xyz0[2] - (xyz1[2] - xyz0[2]) * dz; | |
401 | gMC->Gdtom(tmp, xyz1, 1); // global coord. at the wire | |
402 | fTrackPosition.SetXYZT(xyz1[0], xyz1[1], xyz1[2], fTrackPosition.T()); | |
403 | } else { | |
404 | TLorentzVector backToWire( fStepSum[idvol]/2.*sin(theta)*cos(phi), | |
405 | fStepSum[idvol]/2.*sin(theta)*sin(phi), | |
406 | fStepSum[idvol]/2.*cos(theta),0.0 ); | |
407 | fTrackPosition-=backToWire; | |
408 | //printf(" %d %d %d %f %d \n", gMC->IsTrackExiting(), gMC->IsTrackStop(), gMC->IsTrackDisappeared(), fStepSum[idvol], iEnter); | |
409 | // AliDebug(1, | |
410 | // Form("Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z())); | |
411 | // AliDebug(1, | |
412 | // Form("Exit: Track backToWire %f %f %f",backToWire.X(),backToWire.Y(),backToWire.Z())) ; | |
413 | } | |
d59b2ec3 | 414 | |
415 | //-------------- Angle effect | |
416 | // Ratio between energy loss of particle and Mip as a function of BetaGamma of particle (Energy/Mass) | |
417 | ||
418 | Float_t betaxGamma = fTrackMomentum.P()/mass;// pc/mc2 | |
419 | Float_t sigmaEffect10degrees; | |
420 | Float_t sigmaEffectThetadegrees; | |
421 | Float_t eLossParticleELossMip; | |
422 | Float_t yAngleEffect=0.; | |
d7d39669 | 423 | Float_t thetawires = TMath::ASin( TMath::Sin(TMath::Pi()-theta) * TMath::Sin(phi) ) ;// We use Pi-theta because z is negative |
424 | Double_t bField[3] = {0}; | |
425 | fTrackPosition.Vect().GetXYZ(tmp); | |
f7a1cc68 | 426 | TGeoGlobalMagField::Instance()->Field(tmp,bField); |
d59b2ec3 | 427 | |
d7d39669 | 428 | if (fAngleEffect && !fMagEffect){ |
429 | thetawires = TMath::Abs(thetawires); | |
d59b2ec3 | 430 | if ( (betaxGamma >3.2) && (thetawires*kRaddeg<=15.) ) { |
431 | betaxGamma=TMath::Log(betaxGamma); | |
432 | eLossParticleELossMip = fElossRatio->Eval(betaxGamma); | |
433 | // 10 degrees is a reference for a model (arbitrary) | |
434 | sigmaEffect10degrees=fAngleEffect10->Eval(eLossParticleELossMip);// in micrometers | |
435 | // Angle with respect to the wires assuming that chambers are perpendicular to the z axis. | |
436 | sigmaEffectThetadegrees = sigmaEffect10degrees/fAngleEffectNorma->Eval(thetawires*kRaddeg); // For 5mm gap | |
437 | if ( (iChamber==1) || (iChamber==2) ) | |
438 | sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02*(thetawires*kRaddeg)); // The gap is different (4mm) | |
439 | yAngleEffect=1.e-04*gRandom->Gaus(0,sigmaEffectThetadegrees); // Error due to the angle effect in cm | |
440 | } | |
441 | } | |
d7d39669 | 442 | else if (fAngleEffect && fMagEffect) { |
443 | if ( (betaxGamma >3.2) && (TMath::Abs(thetawires*kRaddeg)<=15.) ) { | |
444 | betaxGamma=TMath::Log(betaxGamma); | |
445 | eLossParticleELossMip = fElossRatio->Eval(betaxGamma); | |
446 | // 10 degrees is a reference for a model (arbitrary) | |
447 | sigmaEffect10degrees=fAngleEffect10->Eval(eLossParticleELossMip);// in micrometers | |
448 | // Angle with respect to the wires assuming that chambers are perpendicular to the z axis. | |
449 | sigmaEffectThetadegrees = sigmaEffect10degrees/fMagAngleEffectNorma->Eval(thetawires*kRaddeg,bField[0]/10.); // For 5mm gap | |
450 | if ( (iChamber==1) || (iChamber==2) ) | |
451 | sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02*(thetawires*kRaddeg)); // The gap is different (4mm) | |
452 | yAngleEffect=1.e-04*gRandom->Gaus(0,sigmaEffectThetadegrees); // Error due to the angle effect in cm | |
453 | } | |
454 | } | |
d59b2ec3 | 455 | |
d7d39669 | 456 | AliMUONHit hit(fIshunt, |
457 | gAlice->GetMCApp()->GetCurrentTrackNumber(), | |
458 | detElemId, ipart, | |
459 | fTrackPosition.X(), | |
460 | fTrackPosition.Y()+yAngleEffect, | |
461 | fTrackPosition.Z(), | |
462 | gMC->TrackTime(), | |
463 | fTrackMomentum.P(), | |
464 | theta, | |
465 | phi, | |
466 | fStepSum[idvol], | |
467 | fDestepSum[idvol], | |
468 | fTrackPosition.X(), | |
469 | fTrackPosition.Y(), | |
470 | fTrackPosition.Z()); | |
471 | ||
bb2bab35 | 472 | fHitStore->Add(hit); |
5a0e88a7 | 473 | |
d59b2ec3 | 474 | fStepSum[idvol] =0; // Reset for the next event |
475 | fDestepSum[idvol]=0; // Reset for the next event | |
c5ce4e69 | 476 | iEnter = 0; |
d59b2ec3 | 477 | } |
478 | } |