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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 | ||
cdd730d0 | 59 | using std::endl; |
60 | using std::cout; | |
61 | using std::setw; | |
5398f946 | 62 | /// \cond CLASSIMP |
a9e2aefa | 63 | ClassImp(AliMUONv1) |
5398f946 | 64 | /// \endcond |
a9e2aefa | 65 | |
66 | //___________________________________________ | |
30178c30 | 67 | AliMUONv1::AliMUONv1() |
68 | : AliMUON(), | |
d4bb94a1 | 69 | fAngleEffect(kTRUE), |
d7d39669 | 70 | fMagEffect(kTRUE), |
d4bb94a1 | 71 | fStepMaxInActiveGas(0.6), |
72 | fStepSum(0x0), | |
73 | fDestepSum(0x0), | |
74 | fTrackMomentum(), | |
75 | fTrackPosition(), | |
76 | fElossRatio(0x0), | |
77 | fAngleEffect10(0x0), | |
d7d39669 | 78 | fAngleEffectNorma(0x0), |
79 | fMagAngleEffectNorma(0x0) | |
a9e2aefa | 80 | { |
d19b6003 | 81 | /// Default constructor |
82 | ||
83 | AliDebug(1,Form("default (empty) ctor this=%p",this)); | |
1391e633 | 84 | } |
d4bb94a1 | 85 | |
a9e2aefa | 86 | //___________________________________________ |
9bf406e1 | 87 | AliMUONv1::AliMUONv1(const char *name, const char* title) |
88 | : AliMUON(name, title), | |
d4bb94a1 | 89 | fAngleEffect(kTRUE), |
d7d39669 | 90 | fMagEffect(kTRUE), |
d4bb94a1 | 91 | fStepMaxInActiveGas(0.6), |
92 | fStepSum(0x0), | |
93 | fDestepSum(0x0), | |
94 | fTrackMomentum(), | |
95 | fTrackPosition(), | |
96 | fElossRatio(0x0), | |
97 | fAngleEffect10(0x0), | |
d7d39669 | 98 | fAngleEffectNorma(0x0), |
99 | fMagAngleEffectNorma(0x0) | |
a9e2aefa | 100 | { |
d19b6003 | 101 | /// Standard onstructor |
d4bb94a1 | 102 | |
d19b6003 | 103 | AliDebug(1,Form("ctor this=%p",this)); |
edee5e63 | 104 | |
331a617a | 105 | // Load mapping |
106 | if ( ! AliMpCDB::LoadMpSegmentation() ) { | |
107 | AliFatal("Could not access mapping from OCDB !"); | |
108 | } | |
109 | ||
ba030c0e | 110 | // By default include all stations |
c33d9661 | 111 | |
1391e633 | 112 | fStepSum = new Float_t [AliMUONConstants::NCh()]; |
113 | fDestepSum = new Float_t [AliMUONConstants::NCh()]; | |
114 | for (Int_t i=0; i<AliMUONConstants::NCh(); i++) { | |
115 | fStepSum[i] =0.0; | |
116 | fDestepSum[i]=0.0; | |
117 | } | |
118 | // Ratio of particle mean eloss with respect MIP's Khalil Boudjemline, sep 2003, PhD.Thesis and Particle Data Book | |
119 | fElossRatio = new TF1("ElossRatio","[0]+[1]*x+[2]*x*x+[3]*x*x*x+[4]*x*x*x*x",0.5,5.); | |
120 | fElossRatio->SetParameter(0,1.02138); | |
121 | fElossRatio->SetParameter(1,-9.54149e-02); | |
122 | fElossRatio->SetParameter(2,+7.83433e-02); | |
123 | fElossRatio->SetParameter(3,-9.98208e-03); | |
124 | fElossRatio->SetParameter(4,+3.83279e-04); | |
125 | ||
126 | // Angle effect in tracking chambers at theta =10 degres as a function of ElossRatio (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis) (in micrometers) | |
127 | fAngleEffect10 = new TF1("AngleEffect10","[0]+[1]*x+[2]*x*x",0.5,3.0); | |
128 | fAngleEffect10->SetParameter(0, 1.90691e+02); | |
129 | fAngleEffect10->SetParameter(1,-6.62258e+01); | |
130 | fAngleEffect10->SetParameter(2,+1.28247e+01); | |
131 | // Angle effect: Normalisation form theta=10 degres to theta between 0 and 10 (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis) | |
132 | // Angle with respect to the wires assuming that chambers are perpendicular to the z axis. | |
133 | fAngleEffectNorma = new TF1("AngleEffectNorma","[0]+[1]*x+[2]*x*x+[3]*x*x*x",0.0,10.0); | |
134 | fAngleEffectNorma->SetParameter(0,4.148); | |
135 | fAngleEffectNorma->SetParameter(1,-6.809e-01); | |
136 | fAngleEffectNorma->SetParameter(2,5.151e-02); | |
137 | fAngleEffectNorma->SetParameter(3,-1.490e-03); | |
d7d39669 | 138 | |
139 | // Magnetic field effect: Normalisation form theta=16 degres (eq. 10 degrees B=0) to theta between -20 and 20 (Lamia Benhabib jun 2006 ) | |
140 | // Angle with respect to the wires assuming that chambers are perpendicular to the z axis. | |
141 | 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.); | |
142 | fMagAngleEffectNorma->SetParameters(8.6995, 25.4022, 13.8822, 2.4717, 1.1551, -0.0624, 0.0012); | |
a9e2aefa | 143 | } |
144 | ||
145 | //___________________________________________ | |
acc838fd | 146 | AliMUONv1::~AliMUONv1() |
a9e2aefa | 147 | { |
d19b6003 | 148 | /// Destructor |
149 | ||
150 | AliDebug(1,Form("dtor this=%p",this)); | |
d4bb94a1 | 151 | delete [] fStepSum; |
152 | delete [] fDestepSum; | |
153 | delete fElossRatio; | |
154 | delete fAngleEffect10; | |
8109731a | 155 | delete fAngleEffectNorma; |
d7d39669 | 156 | delete fMagAngleEffectNorma; |
acc838fd | 157 | } |
b17c0c87 | 158 | |
acc838fd | 159 | //__________________________________________________ |
160 | void AliMUONv1::CreateGeometry() | |
161 | { | |
d19b6003 | 162 | /// Construct geometry using geometry builder |
a9e2aefa | 163 | |
d4bb94a1 | 164 | fGeometryBuilder->CreateGeometry(); |
acc838fd | 165 | } |
a9e2aefa | 166 | |
acc838fd | 167 | //________________________________________________________________ |
a9e2aefa | 168 | void AliMUONv1::CreateMaterials() |
169 | { | |
d19b6003 | 170 | /// Construct materials using geometry builder |
acc838fd | 171 | |
d4bb94a1 | 172 | fGeometryBuilder->CreateMaterials(); |
a9e2aefa | 173 | } |
174 | ||
450ca6fb | 175 | //________________________________________________________________ |
176 | void AliMUONv1::UpdateInternalGeometry() | |
177 | { | |
178 | /// Update geometry after applying mis-alignment | |
179 | ||
008b1449 | 180 | // Load mapping |
181 | if ( ! AliMpCDB::LoadMpSegmentation() ) { | |
182 | AliFatal("Could not access mapping from OCDB !"); | |
183 | } | |
184 | ||
450ca6fb | 185 | fGeometryBuilder->UpdateInternalGeometry(); |
186 | } | |
187 | ||
c28b5041 | 188 | //________________________________________________________________ |
189 | void AliMUONv1::AddAlignableVolumes() const | |
190 | { | |
191 | /// Construct materials using geometry builder | |
192 | ||
193 | GetGeometryTransformer()->AddAlignableVolumes(); | |
194 | } | |
195 | ||
196 | ||
acc838fd | 197 | //___________________________________________ |
a9e2aefa | 198 | void AliMUONv1::Init() |
a713db22 | 199 | { |
d19b6003 | 200 | /// Initialize geometry |
201 | ||
edee5e63 | 202 | AliDebug(1,"Start Init for version 1 - CPC chamber type"); |
002920d1 | 203 | |
edee5e63 | 204 | fGeometryBuilder->InitGeometry(); |
205 | AliDebug(1,"Finished Init for version 1 - CPC chamber type"); | |
b7ef3c96 | 206 | |
207 | ||
b7ef3c96 | 208 | // Build segmentation |
209 | // using geometry parametrisation | |
210 | // | |
b7ef3c96 | 211 | // Build response |
edee5e63 | 212 | // |
43d7561d | 213 | AliMUONResponseFactory respFactory("default", fIsTailEffect); |
b7ef3c96 | 214 | respFactory.Build(this); |
215 | ||
a9e2aefa | 216 | } |
1391e633 | 217 | |
d4bb94a1 | 218 | //__________________________________________________________________ |
273e54a3 | 219 | Int_t AliMUONv1::GetGeomModuleId(Int_t volId) const |
d4bb94a1 | 220 | { |
d19b6003 | 221 | /// Check if the volume with specified volId is a sensitive volume (gas) |
5398f946 | 222 | /// of some chamber and return the chamber number; |
d19b6003 | 223 | /// if not sensitive volume - return 0. |
d4bb94a1 | 224 | |
273e54a3 | 225 | for (Int_t i = 0; i < AliMUONConstants::NGeomModules(); i++) { |
b7ef3c96 | 226 | if ( GetGeometry()->GetModule(i)->IsSensitiveVolume(volId) ) |
273e54a3 | 227 | return i; |
b7ef3c96 | 228 | } |
d4bb94a1 | 229 | |
273e54a3 | 230 | return -1; |
d4bb94a1 | 231 | } |
333f7cda | 232 | |
233 | //_______________________________________________________________________________ | |
234 | TString AliMUONv1::CurrentVolumePath() const | |
235 | { | |
d19b6003 | 236 | /// Return current volume path |
237 | /// (Could be removed when this function is available via gMC) | |
333f7cda | 238 | |
239 | TString path = ""; | |
240 | TString name; | |
241 | Int_t copyNo; | |
242 | Int_t imother = 0; | |
243 | do { | |
244 | name = gMC->CurrentVolOffName(imother); | |
245 | gMC->CurrentVolOffID(imother++, copyNo); | |
246 | TString add = "/"; | |
247 | add += name; | |
7ecf374b | 248 | add += "_"; |
333f7cda | 249 | add += copyNo; |
250 | path.Insert(0,add); | |
251 | } | |
252 | while ( name != TString("ALIC") ); | |
253 | ||
254 | return path; | |
255 | } | |
256 | ||
1391e633 | 257 | //_______________________________________________________________________________ |
c33d9661 | 258 | void AliMUONv1::StepManager() |
259 | { | |
d19b6003 | 260 | /// Step manager for the chambers |
c33d9661 | 261 | |
262 | // Only charged tracks | |
d59b2ec3 | 263 | if( !(gMC->TrackCharge()) ) return; |
1391e633 | 264 | // Only charged tracks |
265 | ||
c33d9661 | 266 | // Only gas gap inside chamber |
267 | // Tag chambers and record hits when track enters | |
d95fe39e | 268 | static Int_t idvol=-1, iEnter = 0; |
1391e633 | 269 | Int_t copy; |
270 | const Float_t kBig = 1.e10; | |
d95fe39e | 271 | static Double_t xyzEnter[3]; |
acc838fd | 272 | |
273 | // | |
274 | // Only gas gap inside chamber | |
275 | // Tag chambers and record hits when track enters | |
273e54a3 | 276 | Int_t id=gMC->CurrentVolID(copy); |
277 | Int_t iGeomModule = GetGeomModuleId(id); | |
278 | if (iGeomModule == -1) return; | |
acc838fd | 279 | |
d95fe39e | 280 | // Detection elements id |
281 | const AliMUONGeometryModule* kGeometryModule | |
273e54a3 | 282 | = GetGeometry()->GetModule(iGeomModule); |
d95fe39e | 283 | AliMUONGeometryDetElement* detElement |
284 | = kGeometryModule->FindBySensitiveVolume(CurrentVolumePath()); | |
273e54a3 | 285 | |
286 | if (!detElement && iGeomModule < AliMUONConstants::NGeomModules()-2) { | |
287 | iGeomModule++; | |
288 | const AliMUONGeometryModule* kGeometryModule2 | |
289 | = GetGeometry()->GetModule(iGeomModule); | |
290 | detElement | |
291 | = kGeometryModule2->FindBySensitiveVolume(CurrentVolumePath()); | |
292 | } | |
374ebd7d | 293 | |
d95fe39e | 294 | Int_t detElemId = 0; |
295 | if (detElement) detElemId = detElement->GetUniqueID(); | |
333f7cda | 296 | |
d95fe39e | 297 | if (!detElemId) { |
273e54a3 | 298 | AliErrorStream() |
299 | << "Geometry module id: " | |
300 | << setw(3) << iGeomModule << " " | |
d95fe39e | 301 | << "Current SV: " |
302 | << CurrentVolumePath() | |
303 | << " detElemId: " | |
304 | << setw(5) << detElemId | |
305 | << endl; | |
306 | Double_t x, y, z; | |
307 | gMC->TrackPosition(x, y, z); | |
273e54a3 | 308 | AliErrorStream() |
309 | << " global position: " | |
d95fe39e | 310 | << x << ", " << y << ", " << z |
311 | << endl; | |
273e54a3 | 312 | AliErrorStream() << "DetElemId not identified." << endl; |
313 | } | |
314 | ||
315 | Int_t iChamber = AliMpDEManager::GetChamberId(detElemId) + 1; | |
316 | idvol = iChamber -1; | |
333f7cda | 317 | |
d59b2ec3 | 318 | // Filling TrackRefs file for MUON. Our Track references are the active volume of the chambers |
d95fe39e | 319 | if ( (gMC->IsTrackEntering() || gMC->IsTrackExiting() ) ) { |
320 | AliTrackReference* trackReference | |
e6add757 | 321 | = AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kMUON); |
d95fe39e | 322 | trackReference->SetUserId(detElemId); |
323 | } | |
d59b2ec3 | 324 | |
d95fe39e | 325 | if( gMC->IsTrackEntering() ) { |
d59b2ec3 | 326 | Float_t theta = fTrackMomentum.Theta(); |
d631bec8 | 327 | if ( fIsMaxStep && (TMath::Pi()-theta)*kRaddeg>=15. ) { |
328 | gMC->SetMaxStep(fStepMaxInActiveGas); // We use Pi-theta because z is negative | |
329 | } | |
c5ce4e69 | 330 | iEnter = 1; |
331 | gMC->TrackPosition(xyzEnter[0], xyzEnter[1], xyzEnter[2]); // save coordinates of entrance point | |
d59b2ec3 | 332 | } |
333 | ||
5a0e88a7 | 334 | // AliDebug(1, |
335 | // Form("Active volume found %d chamber %d Z chamber is %f ",idvol,iChamber, | |
336 | // ( (AliMUONChamber*)(*fChambers)[idvol])->Z())) ; | |
d59b2ec3 | 337 | // Particule id and mass, |
338 | Int_t ipart = gMC->TrackPid(); | |
339 | Float_t mass = gMC->TrackMass(); | |
340 | ||
341 | fDestepSum[idvol]+=gMC->Edep(); | |
342 | // Get current particle id (ipart), track position (pos) and momentum (mom) | |
343 | if ( fStepSum[idvol]==0.0 ) gMC->TrackMomentum(fTrackMomentum); | |
344 | fStepSum[idvol]+=gMC->TrackStep(); | |
345 | ||
5a0e88a7 | 346 | // if (AliDebugLevel()) { |
347 | // AliDebug(1,Form("Step, iChamber %d, Particle %d, theta %f phi %f mass %f StepSum %f eloss %g", | |
348 | // iChamber,ipart, fTrackMomentum.Theta()*kRaddeg, fTrackMomentum.Phi()*kRaddeg, | |
349 | // mass, fStepSum[idvol], gMC->Edep())); | |
350 | // AliDebug(1,Form("Step:Track Momentum %f %f %f", fTrackMomentum.X(), fTrackMomentum.Y(), | |
351 | // fTrackMomentum.Z())); | |
352 | // gMC->TrackPosition(fTrackPosition); | |
353 | // AliDebug(1,Form("Step: Track Position %f %f %f",fTrackPosition.X(), | |
354 | // fTrackPosition.Y(),fTrackPosition.Z())) ; | |
355 | //} | |
d59b2ec3 | 356 | |
357 | // Track left chamber or StepSum larger than fStepMaxInActiveGas | |
358 | if ( gMC->IsTrackExiting() || | |
359 | gMC->IsTrackStop() || | |
360 | gMC->IsTrackDisappeared()|| | |
361 | (fStepSum[idvol]>fStepMaxInActiveGas) ) { | |
362 | ||
d631bec8 | 363 | if ( fIsMaxStep && |
364 | ( gMC->IsTrackExiting() || | |
365 | gMC->IsTrackStop() || | |
366 | gMC->IsTrackDisappeared() ) ) gMC->SetMaxStep(kBig); | |
c5ce4e69 | 367 | if (fDestepSum[idvol] == 0) { |
368 | // AZ - no energy release | |
369 | fStepSum[idvol] = 0; // Reset for the next event | |
370 | iEnter = 0; | |
371 | return; | |
372 | } | |
d59b2ec3 | 373 | |
374 | gMC->TrackPosition(fTrackPosition); | |
375 | Float_t theta = fTrackMomentum.Theta(); | |
376 | Float_t phi = fTrackMomentum.Phi(); | |
377 | ||
795b3f56 | 378 | Int_t merge = 0; |
379 | Double_t xyz0[3]={0}, xyz1[3]={0}, tmp[3]={0}; | |
c5ce4e69 | 380 | if (gMC->IsTrackExiting() && iEnter != 0) { |
381 | // AZ - this code is to avoid artificial hit splitting at the | |
382 | // "fake" boundary inside the same chamber. It will still produce | |
383 | // 2 hits but with the same coordinates (at the wire) to allow | |
384 | // their merging at the digitization level. | |
385 | ||
386 | // Only for a track going from the entrance to the exit from the volume | |
387 | // Get local coordinates | |
c5ce4e69 | 388 | gMC->Gmtod(xyzEnter, xyz0, 1); // local coord. at the entrance |
389 | ||
390 | fTrackPosition.Vect().GetXYZ(tmp); | |
391 | gMC->Gmtod(tmp, xyz1, 1); // local coord. at the exit | |
795b3f56 | 392 | Float_t dx = xyz0[0] - xyz1[0]; |
393 | Float_t dy = xyz0[1] - xyz1[1]; | |
394 | Float_t thLoc = TMath::ATan2 (TMath::Sqrt(dx*dx+dy*dy), TMath::Abs(xyz0[2]-xyz1[2])); | |
395 | if (thLoc * TMath::RadToDeg() < 15) merge = 1; | |
396 | } | |
c5ce4e69 | 397 | |
795b3f56 | 398 | if (merge) { |
c5ce4e69 | 399 | Double_t dz = -0.5; |
400 | if (xyz1[2] != xyz0[2]) dz = xyz0[2] / (xyz1[2] - xyz0[2]); | |
401 | tmp[0] = xyz0[0] - (xyz1[0] - xyz0[0]) * dz; // local coord. at the wire | |
402 | tmp[1] = xyz0[1] - (xyz1[1] - xyz0[1]) * dz; | |
403 | tmp[2] = xyz0[2] - (xyz1[2] - xyz0[2]) * dz; | |
404 | gMC->Gdtom(tmp, xyz1, 1); // global coord. at the wire | |
405 | fTrackPosition.SetXYZT(xyz1[0], xyz1[1], xyz1[2], fTrackPosition.T()); | |
406 | } else { | |
407 | TLorentzVector backToWire( fStepSum[idvol]/2.*sin(theta)*cos(phi), | |
408 | fStepSum[idvol]/2.*sin(theta)*sin(phi), | |
409 | fStepSum[idvol]/2.*cos(theta),0.0 ); | |
410 | fTrackPosition-=backToWire; | |
411 | //printf(" %d %d %d %f %d \n", gMC->IsTrackExiting(), gMC->IsTrackStop(), gMC->IsTrackDisappeared(), fStepSum[idvol], iEnter); | |
412 | // AliDebug(1, | |
413 | // Form("Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z())); | |
414 | // AliDebug(1, | |
415 | // Form("Exit: Track backToWire %f %f %f",backToWire.X(),backToWire.Y(),backToWire.Z())) ; | |
416 | } | |
d59b2ec3 | 417 | |
418 | //-------------- Angle effect | |
419 | // Ratio between energy loss of particle and Mip as a function of BetaGamma of particle (Energy/Mass) | |
420 | ||
421 | Float_t betaxGamma = fTrackMomentum.P()/mass;// pc/mc2 | |
422 | Float_t sigmaEffect10degrees; | |
423 | Float_t sigmaEffectThetadegrees; | |
424 | Float_t eLossParticleELossMip; | |
425 | Float_t yAngleEffect=0.; | |
d7d39669 | 426 | Float_t thetawires = TMath::ASin( TMath::Sin(TMath::Pi()-theta) * TMath::Sin(phi) ) ;// We use Pi-theta because z is negative |
427 | Double_t bField[3] = {0}; | |
428 | fTrackPosition.Vect().GetXYZ(tmp); | |
f7a1cc68 | 429 | TGeoGlobalMagField::Instance()->Field(tmp,bField); |
d59b2ec3 | 430 | |
d7d39669 | 431 | if (fAngleEffect && !fMagEffect){ |
432 | thetawires = TMath::Abs(thetawires); | |
d59b2ec3 | 433 | if ( (betaxGamma >3.2) && (thetawires*kRaddeg<=15.) ) { |
434 | betaxGamma=TMath::Log(betaxGamma); | |
435 | eLossParticleELossMip = fElossRatio->Eval(betaxGamma); | |
436 | // 10 degrees is a reference for a model (arbitrary) | |
437 | sigmaEffect10degrees=fAngleEffect10->Eval(eLossParticleELossMip);// in micrometers | |
438 | // Angle with respect to the wires assuming that chambers are perpendicular to the z axis. | |
439 | sigmaEffectThetadegrees = sigmaEffect10degrees/fAngleEffectNorma->Eval(thetawires*kRaddeg); // For 5mm gap | |
440 | if ( (iChamber==1) || (iChamber==2) ) | |
441 | sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02*(thetawires*kRaddeg)); // The gap is different (4mm) | |
442 | yAngleEffect=1.e-04*gRandom->Gaus(0,sigmaEffectThetadegrees); // Error due to the angle effect in cm | |
443 | } | |
444 | } | |
d7d39669 | 445 | else if (fAngleEffect && fMagEffect) { |
446 | if ( (betaxGamma >3.2) && (TMath::Abs(thetawires*kRaddeg)<=15.) ) { | |
447 | betaxGamma=TMath::Log(betaxGamma); | |
448 | eLossParticleELossMip = fElossRatio->Eval(betaxGamma); | |
449 | // 10 degrees is a reference for a model (arbitrary) | |
450 | sigmaEffect10degrees=fAngleEffect10->Eval(eLossParticleELossMip);// in micrometers | |
451 | // Angle with respect to the wires assuming that chambers are perpendicular to the z axis. | |
452 | sigmaEffectThetadegrees = sigmaEffect10degrees/fMagAngleEffectNorma->Eval(thetawires*kRaddeg,bField[0]/10.); // For 5mm gap | |
453 | if ( (iChamber==1) || (iChamber==2) ) | |
454 | sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02*(thetawires*kRaddeg)); // The gap is different (4mm) | |
455 | yAngleEffect=1.e-04*gRandom->Gaus(0,sigmaEffectThetadegrees); // Error due to the angle effect in cm | |
456 | } | |
457 | } | |
d59b2ec3 | 458 | |
d7d39669 | 459 | AliMUONHit hit(fIshunt, |
460 | gAlice->GetMCApp()->GetCurrentTrackNumber(), | |
461 | detElemId, ipart, | |
462 | fTrackPosition.X(), | |
463 | fTrackPosition.Y()+yAngleEffect, | |
464 | fTrackPosition.Z(), | |
465 | gMC->TrackTime(), | |
466 | fTrackMomentum.P(), | |
467 | theta, | |
468 | phi, | |
469 | fStepSum[idvol], | |
470 | fDestepSum[idvol], | |
471 | fTrackPosition.X(), | |
472 | fTrackPosition.Y(), | |
473 | fTrackPosition.Z()); | |
474 | ||
bb2bab35 | 475 | fHitStore->Add(hit); |
5a0e88a7 | 476 | |
d59b2ec3 | 477 | fStepSum[idvol] =0; // Reset for the next event |
478 | fDestepSum[idvol]=0; // Reset for the next event | |
c5ce4e69 | 479 | iEnter = 0; |
d59b2ec3 | 480 | } |
481 | } |