1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * SigmaEffect_thetadegrees *
4 * Author: The ALICE Off-line Project. *
5 * Contributors are mentioned in the code where appropriate. *
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 *
12 * about the suitability of this software for any purpeateose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 /////////////////////////////////////////////////////////
19 // Manager and hits classes for set:MUON version 1 //
20 /////////////////////////////////////////////////////////
24 #include <TClonesArray.h>
26 #include <TVirtualMC.h>
27 #include <TGeoMatrix.h>
29 #include "AliMUONv1.h"
31 #include "AliMUONConstants.h"
32 #include "AliMUONSegFactory.h"
33 #include "AliMUONResponseFactory.h"
34 #include "AliMUONSegmentation.h"
35 #include "AliMUONHit.h"
36 #include "AliMUONTriggerCircuit.h"
37 #include "AliMUONGeometryBuilder.h"
38 #include "AliMUONGeometry.h"
39 #include "AliMUONGeometryTransformer.h"
40 #include "AliMUONGeometryModule.h"
41 #include "AliMUONGeometrySVMap.h"
42 #include "AliMUONGeometryDetElement.h"
52 //___________________________________________
53 AliMUONv1::AliMUONv1()
55 fStepManagerVersionOld(kTRUE),
56 fStepManagerVersionDE(kTRUE),
58 fStepMaxInActiveGas(0.6),
65 fAngleEffectNorma(0x0)
67 // Default constructor
68 AliDebug(1,Form("default (empty) ctor this=%p",this));
71 //___________________________________________
72 AliMUONv1::AliMUONv1(const char *name, const char *title)
73 : AliMUON(name,title),
74 fStepManagerVersionOld(kTRUE),
75 fStepManagerVersionDE(kTRUE),
77 fStepMaxInActiveGas(0.6),
84 fAngleEffectNorma(0x0)
86 // Standard onstructor
88 AliDebug(1,Form("ctor this=%p",this));
90 // By default include all stations
92 fStepSum = new Float_t [AliMUONConstants::NCh()];
93 fDestepSum = new Float_t [AliMUONConstants::NCh()];
94 for (Int_t i=0; i<AliMUONConstants::NCh(); i++) {
98 // Ratio of particle mean eloss with respect MIP's Khalil Boudjemline, sep 2003, PhD.Thesis and Particle Data Book
99 fElossRatio = new TF1("ElossRatio","[0]+[1]*x+[2]*x*x+[3]*x*x*x+[4]*x*x*x*x",0.5,5.);
100 fElossRatio->SetParameter(0,1.02138);
101 fElossRatio->SetParameter(1,-9.54149e-02);
102 fElossRatio->SetParameter(2,+7.83433e-02);
103 fElossRatio->SetParameter(3,-9.98208e-03);
104 fElossRatio->SetParameter(4,+3.83279e-04);
106 // Angle effect in tracking chambers at theta =10 degres as a function of ElossRatio (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis) (in micrometers)
107 fAngleEffect10 = new TF1("AngleEffect10","[0]+[1]*x+[2]*x*x",0.5,3.0);
108 fAngleEffect10->SetParameter(0, 1.90691e+02);
109 fAngleEffect10->SetParameter(1,-6.62258e+01);
110 fAngleEffect10->SetParameter(2,+1.28247e+01);
111 // Angle effect: Normalisation form theta=10 degres to theta between 0 and 10 (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis)
112 // Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
113 fAngleEffectNorma = new TF1("AngleEffectNorma","[0]+[1]*x+[2]*x*x+[3]*x*x*x",0.0,10.0);
114 fAngleEffectNorma->SetParameter(0,4.148);
115 fAngleEffectNorma->SetParameter(1,-6.809e-01);
116 fAngleEffectNorma->SetParameter(2,5.151e-02);
117 fAngleEffectNorma->SetParameter(3,-1.490e-03);
120 //_____________________________________________________________________________
121 AliMUONv1::AliMUONv1(const AliMUONv1& right)
124 // copy constructor (not implemented)
126 AliFatal("Copy constructor not provided.");
129 //___________________________________________
130 AliMUONv1::~AliMUONv1()
133 AliDebug(1,Form("dtor this=%p",this));
135 delete [] fDestepSum;
137 delete fAngleEffect10;
138 delete fAngleEffectNorma;
141 //_____________________________________________________________________________
142 AliMUONv1& AliMUONv1::operator=(const AliMUONv1& right)
144 // assignement operator (not implemented)
146 // check assignement to self
147 if (this == &right) return *this;
149 AliFatal("Assignement operator not provided.");
154 //__________________________________________________
155 void AliMUONv1::CreateGeometry()
158 // Construct geometry using geometry builder
161 fGeometryBuilder->CreateGeometry();
164 //________________________________________________________________
165 void AliMUONv1::CreateMaterials()
168 // Construct materials using geometry builder
171 fGeometryBuilder->CreateMaterials();
174 //___________________________________________
175 void AliMUONv1::Init()
177 AliDebug(1,"Start Init for version 1 - CPC chamber type");
180 // Initialize geometry
182 fGeometryBuilder->InitGeometry();
183 AliDebug(1,"Finished Init for version 1 - CPC chamber type");
186 std::string ftype(GetTitle());
188 // Build segmentation
189 // using geometry parametrisation
191 AliMUONSegFactory segFactory(GetGeometryTransformer());
192 fSegmentation = segFactory.CreateSegmentation(ftype);
194 if (!fSegmentation) {
195 AliFatal(Form("Wrong factory type : %s",ftype.c_str()));
200 AliMUONResponseFactory respFactory("default");
201 respFactory.Build(this);
204 // Initialize segmentation
206 fSegmentation->Init();
208 // Initialize trigger circuits
210 for (Int_t i=0; i<AliMUONConstants::NTriggerCircuit(); i++) {
211 AliMUONTriggerCircuit* c = (AliMUONTriggerCircuit*)(fTriggerCircuits->At(i));
218 //__________________________________________________________________
219 Int_t AliMUONv1::GetChamberId(Int_t volId) const
221 // Check if the volume with specified volId is a sensitive volume (gas)
222 // of some chamber and returns the chamber number;
223 // if not sensitive volume - return 0.
226 for (Int_t i = 0; i < AliMUONConstants::NCh(); i++) {
227 if ( GetGeometry()->GetModule(i)->IsSensitiveVolume(volId) )
234 //_______________________________________________________________________________
235 TString AliMUONv1::CurrentVolumePath() const
237 // Returns current volume path
238 // (Could be removed when this function is available via gMC)
246 name = gMC->CurrentVolOffName(imother);
247 gMC->CurrentVolOffID(imother++, copyNo);
254 while ( name != TString("ALIC") );
259 //_______________________________________________________________________________
260 void AliMUONv1::StepManager()
262 // Stepmanager for the chambers
265 if (fStepManagerVersionDE) {
271 // Only charged tracks
272 if( !(gMC->TrackCharge()) ) return;
273 // Only charged tracks
275 // Only gas gap inside chamber
276 // Tag chambers and record hits when track enters
277 static Int_t idvol=-1;
281 const Float_t kBig = 1.e10;
285 // Only gas gap inside chamber
286 // Tag chambers and record hits when track enters
287 id=gMC->CurrentVolID(copy);
288 iChamber = GetChamberId(id);
291 if (idvol == -1) return;
293 // Filling TrackRefs file for MUON. Our Track references are the active volume of the chambers
294 if ( (gMC->IsTrackEntering() || gMC->IsTrackExiting() ) )
295 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber());
297 if( gMC->IsTrackEntering() ) {
298 Float_t theta = fTrackMomentum.Theta();
299 if ((TMath::Pi()-theta)*kRaddeg>=15.) gMC->SetMaxStep(fStepMaxInActiveGas); // We use Pi-theta because z is negative
303 // Form("Active volume found %d chamber %d Z chamber is %f ",idvol,iChamber,
304 // ( (AliMUONChamber*)(*fChambers)[idvol])->Z()));
305 // Particule id and mass,
306 Int_t ipart = gMC->TrackPid();
307 Float_t mass = gMC->TrackMass();
309 fDestepSum[idvol]+=gMC->Edep();
310 // Get current particle id (ipart), track position (pos) and momentum (mom)
311 if ( fStepSum[idvol]==0.0 ) gMC->TrackMomentum(fTrackMomentum);
312 fStepSum[idvol]+=gMC->TrackStep();
314 // if(AliDebugLevel()) {
316 // Form("iChamber %d, Particle %d, theta %f phi %f mass %f StepSum %f eloss %g",
317 // iChamber,ipart, fTrackMomentum.Theta()*kRaddeg, fTrackMomentum.Phi()*kRaddeg,
318 // mass, fStepSum[idvol], gMC->Edep()));
320 // Form("Track Momentum %f %f %f", fTrackMomentum.X(), fTrackMomentum.Y(),
321 // fTrackMomentum.Z()));
322 // gMC->TrackPosition(fTrackPosition);
324 // Form("Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),
325 // fTrackPosition.Z())) ;
328 // Track left chamber or StepSum larger than fStepMaxInActiveGas
329 if ( gMC->IsTrackExiting() ||
330 gMC->IsTrackStop() ||
331 gMC->IsTrackDisappeared()||
332 (fStepSum[idvol]>fStepMaxInActiveGas) ) {
334 if ( gMC->IsTrackExiting() ||
335 gMC->IsTrackStop() ||
336 gMC->IsTrackDisappeared() ) gMC->SetMaxStep(kBig);
338 gMC->TrackPosition(fTrackPosition);
339 Float_t theta = fTrackMomentum.Theta();
340 Float_t phi = fTrackMomentum.Phi();
342 TLorentzVector backToWire( fStepSum[idvol]/2.*sin(theta)*cos(phi),
343 fStepSum[idvol]/2.*sin(theta)*sin(phi),
344 fStepSum[idvol]/2.*cos(theta),0.0 );
345 // AliDebug(1,Form("Exit: Track Position %f %f %f",fTrackPosition.X(),
346 // fTrackPosition.Y(),fTrackPosition.Z())) ;
347 // AliDebug(1,Form("Exit: Track backToWire %f %f %f",backToWire.X(),
348 // backToWire.Y(),backToWire.Z()) ;
349 fTrackPosition-=backToWire;
351 //-------------- Angle effect
352 // Ratio between energy loss of particle and Mip as a function of BetaGamma of particle (Energy/Mass)
354 Float_t betaxGamma = fTrackMomentum.P()/mass;// pc/mc2
355 Float_t sigmaEffect10degrees;
356 Float_t sigmaEffectThetadegrees;
357 Float_t eLossParticleELossMip;
358 Float_t yAngleEffect=0.;
359 Float_t thetawires = TMath::Abs( TMath::ASin( TMath::Sin(TMath::Pi()-theta) * TMath::Sin(phi) ) );// We use Pi-theta because z is negative
363 if ( (betaxGamma >3.2) && (thetawires*kRaddeg<=15.) ) {
364 betaxGamma=TMath::Log(betaxGamma);
365 eLossParticleELossMip = fElossRatio->Eval(betaxGamma);
366 // 10 degrees is a reference for a model (arbitrary)
367 sigmaEffect10degrees=fAngleEffect10->Eval(eLossParticleELossMip);// in micrometers
368 // Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
369 sigmaEffectThetadegrees = sigmaEffect10degrees/fAngleEffectNorma->Eval(thetawires*kRaddeg); // For 5mm gap
370 if ( (iChamber==1) || (iChamber==2) )
371 sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02*(thetawires*kRaddeg)); // The gap is different (4mm)
372 yAngleEffect=1.e-04*gRandom->Gaus(0,sigmaEffectThetadegrees); // Error due to the angle effect in cm
376 // Detection elements ids
377 const AliMUONGeometryModule* kGeometryModule
378 = GetGeometry()->GetModule(iChamber-1);
380 AliMUONGeometryDetElement* detElement
381 = kGeometryModule->FindBySensitiveVolume(CurrentVolumePath());
384 if (detElement) detElemId = detElement->GetUniqueID();
387 cerr << "Chamber id: "
388 << setw(3) << iChamber << " "
390 << CurrentVolumePath()
392 << setw(5) << detElemId
395 gMC->TrackPosition(x, y, z);
396 cerr << " global position: "
397 << x << ", " << y << ", " << z
399 AliWarning("DetElemId not identified.");
402 // One hit per chamber
403 GetMUONData()->AddHit(fIshunt,
404 gAlice->GetMCApp()->GetCurrentTrackNumber(),
407 fTrackPosition.Y()+yAngleEffect,
419 // if (AliDebugLevel()){
420 // AliDebug(1,Form("Exit: Particle exiting from chamber %d",iChamber));
421 // AliDebug(1,Form("Exit: StepSum %f eloss geant %g ",fStepSum[idvol],fDestepSum[idvol]));
422 // AliDebug(1,Form("Exit: Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z())) ;
424 fStepSum[idvol] =0; // Reset for the next event
425 fDestepSum[idvol]=0; // Reset for the next event
429 //_______________________________________________________________________________
430 void AliMUONv1::StepManager2()
432 // Stepmanager for the chambers
434 // Only charged tracks
435 if( !(gMC->TrackCharge()) ) return;
436 // Only charged tracks
438 // Only gas gap inside chamber
439 // Tag chambers and record hits when track enters
440 static Int_t idvol=-1;
444 const Float_t kBig = 1.e10;
448 // Only gas gap inside chamber
449 // Tag chambers and record hits when track enters
450 id=gMC->CurrentVolID(copy);
451 iChamber = GetChamberId(id);
454 if (idvol == -1) return;
456 // Filling TrackRefs file for MUON. Our Track references are the active volume of the chambers
457 if ( (gMC->IsTrackEntering() || gMC->IsTrackExiting() ) )
458 AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber());
460 if( gMC->IsTrackEntering() ) {
461 Float_t theta = fTrackMomentum.Theta();
462 if ((TMath::Pi()-theta)*kRaddeg>=15.) gMC->SetMaxStep(fStepMaxInActiveGas); // We use Pi-theta because z is negative
466 // Form("Active volume found %d chamber %d Z chamber is %f ",idvol,iChamber,
467 // ( (AliMUONChamber*)(*fChambers)[idvol])->Z())) ;
468 // Particule id and mass,
469 Int_t ipart = gMC->TrackPid();
470 Float_t mass = gMC->TrackMass();
472 fDestepSum[idvol]+=gMC->Edep();
473 // Get current particle id (ipart), track position (pos) and momentum (mom)
474 if ( fStepSum[idvol]==0.0 ) gMC->TrackMomentum(fTrackMomentum);
475 fStepSum[idvol]+=gMC->TrackStep();
477 // if (AliDebugLevel()) {
478 // AliDebug(1,Form("Step, iChamber %d, Particle %d, theta %f phi %f mass %f StepSum %f eloss %g",
479 // iChamber,ipart, fTrackMomentum.Theta()*kRaddeg, fTrackMomentum.Phi()*kRaddeg,
480 // mass, fStepSum[idvol], gMC->Edep()));
481 // AliDebug(1,Form("Step:Track Momentum %f %f %f", fTrackMomentum.X(), fTrackMomentum.Y(),
482 // fTrackMomentum.Z()));
483 // gMC->TrackPosition(fTrackPosition);
484 // AliDebug(1,Form("Step: Track Position %f %f %f",fTrackPosition.X(),
485 // fTrackPosition.Y(),fTrackPosition.Z())) ;
488 // Track left chamber or StepSum larger than fStepMaxInActiveGas
489 if ( gMC->IsTrackExiting() ||
490 gMC->IsTrackStop() ||
491 gMC->IsTrackDisappeared()||
492 (fStepSum[idvol]>fStepMaxInActiveGas) ) {
494 if ( gMC->IsTrackExiting() ||
495 gMC->IsTrackStop() ||
496 gMC->IsTrackDisappeared() ) gMC->SetMaxStep(kBig);
498 gMC->TrackPosition(fTrackPosition);
499 Float_t theta = fTrackMomentum.Theta();
500 Float_t phi = fTrackMomentum.Phi();
502 TLorentzVector backToWire( fStepSum[idvol]/2.*sin(theta)*cos(phi),
503 fStepSum[idvol]/2.*sin(theta)*sin(phi),
504 fStepSum[idvol]/2.*cos(theta),0.0 );
506 // Form("Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()));
508 // Form("Exit: Track backToWire %f %f %f",backToWire.X(),backToWire.Y(),backToWire.Z())) ;
509 fTrackPosition-=backToWire;
511 //-------------- Angle effect
512 // Ratio between energy loss of particle and Mip as a function of BetaGamma of particle (Energy/Mass)
514 Float_t betaxGamma = fTrackMomentum.P()/mass;// pc/mc2
515 Float_t sigmaEffect10degrees;
516 Float_t sigmaEffectThetadegrees;
517 Float_t eLossParticleELossMip;
518 Float_t yAngleEffect=0.;
519 Float_t thetawires = TMath::Abs( TMath::ASin( TMath::Sin(TMath::Pi()-theta) * TMath::Sin(phi) ) );// We use Pi-theta because z is negative
523 if ( (betaxGamma >3.2) && (thetawires*kRaddeg<=15.) ) {
524 betaxGamma=TMath::Log(betaxGamma);
525 eLossParticleELossMip = fElossRatio->Eval(betaxGamma);
526 // 10 degrees is a reference for a model (arbitrary)
527 sigmaEffect10degrees=fAngleEffect10->Eval(eLossParticleELossMip);// in micrometers
528 // Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
529 sigmaEffectThetadegrees = sigmaEffect10degrees/fAngleEffectNorma->Eval(thetawires*kRaddeg); // For 5mm gap
530 if ( (iChamber==1) || (iChamber==2) )
531 sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02*(thetawires*kRaddeg)); // The gap is different (4mm)
532 yAngleEffect=1.e-04*gRandom->Gaus(0,sigmaEffectThetadegrees); // Error due to the angle effect in cm
536 // Detection elements ids
537 const AliMUONGeometryModule* kGeometryModule
538 = GetGeometry()->GetModule(iChamber-1);
540 AliMUONGeometryDetElement* detElement
541 = kGeometryModule->FindBySensitiveVolume(CurrentVolumePath());
544 if (detElement) detElemId = detElement->GetUniqueID();
547 cerr << "Chamber id: "
548 << setw(3) << iChamber << " "
550 << CurrentVolumePath()
552 << setw(5) << detElemId
555 gMC->TrackPosition(x, y, z);
556 cerr << " global position: "
557 << x << ", " << y << ", " << z
559 AliError("DetElemId not identified.");
562 // One hit per chamber
563 GetMUONData()->AddHit2(fIshunt,
564 gAlice->GetMCApp()->GetCurrentTrackNumber(),
567 fTrackPosition.Y()+yAngleEffect,
579 // AliDebug(1,Form("Exit: Particle exiting from chamber %d",iChamber));
580 // AliDebug(1,Form("Exit: StepSum %f eloss geant %g ",fStepSum[idvol],fDestepSum[idvol]));
581 // AliDebug(1,Form("Exit: Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()) ;
583 fStepSum[idvol] =0; // Reset for the next event
584 fDestepSum[idvol]=0; // Reset for the next event