including task to produce final histograms on isolated photon analysis
[u/mrichter/AliRoot.git] / MUON / AliMUONv1.cxx
CommitLineData
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 60ClassImp(AliMUONv1)
5398f946 61/// \endcond
a9e2aefa 62
63//___________________________________________
30178c30 64AliMUONv1::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 84AliMUONv1::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 143AliMUONv1::~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//__________________________________________________
157void AliMUONv1::CreateGeometry()
158{
d19b6003 159/// Construct geometry using geometry builder
a9e2aefa 160
d4bb94a1 161 fGeometryBuilder->CreateGeometry();
acc838fd 162}
a9e2aefa 163
acc838fd 164//________________________________________________________________
a9e2aefa 165void AliMUONv1::CreateMaterials()
166{
d19b6003 167/// Construct materials using geometry builder
acc838fd 168
d4bb94a1 169 fGeometryBuilder->CreateMaterials();
a9e2aefa 170}
171
c28b5041 172//________________________________________________________________
450ca6fb 173void 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
185//________________________________________________________________
c28b5041 186void AliMUONv1::AddAlignableVolumes() const
187{
188/// Construct materials using geometry builder
189
190 GetGeometryTransformer()->AddAlignableVolumes();
191}
192
193
acc838fd 194//___________________________________________
a9e2aefa 195void 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 216Int_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//_______________________________________________________________________________
231TString 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 255void 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}