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>
25 #include <TLorentzVector.h>
29 #include <TGeoMatrix.h>
30 #include <TVirtualMC.h>
31 #include <TParticle.h>
34 #include "AliMUONChamber.h"
35 #include "AliMUONConstants.h"
36 #include "AliMUONFactory.h"
37 #include "AliMUONHit.h"
38 #include "AliMUONTriggerCircuit.h"
39 #include "AliMUONv1.h"
40 #include "AliMUONVGeometryBuilder.h"
41 #include "AliMUONChamberGeometry.h"
42 #include "AliMUONGeometryEnvelope.h"
43 #include "AliMUONGeometryConstituent.h"
50 //___________________________________________
51 AliMUONv1::AliMUONv1() : AliMUON()
52 ,fTrackMomentum(), fTrackPosition(),fGlobalTransformation(0)
56 fStepManagerVersionOld = kFALSE;
58 fStepMaxInActiveGas = 0.6;
63 fAngleEffectNorma= 0x0;
65 //___________________________________________
66 AliMUONv1::AliMUONv1(const char *name, const char *title)
67 : AliMUON(name,title), fTrackMomentum(), fTrackPosition()
70 // By default include all stations
71 AliMUONFactory factory;
72 factory.Build(this, title);
74 fStepManagerVersionOld = kFALSE;
76 fStepMaxInActiveGas = 0.6;
78 fStepSum = new Float_t [AliMUONConstants::NCh()];
79 fDestepSum = new Float_t [AliMUONConstants::NCh()];
80 for (Int_t i=0; i<AliMUONConstants::NCh(); i++) {
84 // Ratio of particle mean eloss with respect MIP's Khalil Boudjemline, sep 2003, PhD.Thesis and Particle Data Book
85 fElossRatio = new TF1("ElossRatio","[0]+[1]*x+[2]*x*x+[3]*x*x*x+[4]*x*x*x*x",0.5,5.);
86 fElossRatio->SetParameter(0,1.02138);
87 fElossRatio->SetParameter(1,-9.54149e-02);
88 fElossRatio->SetParameter(2,+7.83433e-02);
89 fElossRatio->SetParameter(3,-9.98208e-03);
90 fElossRatio->SetParameter(4,+3.83279e-04);
92 // Angle effect in tracking chambers at theta =10 degres as a function of ElossRatio (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis) (in micrometers)
93 fAngleEffect10 = new TF1("AngleEffect10","[0]+[1]*x+[2]*x*x",0.5,3.0);
94 fAngleEffect10->SetParameter(0, 1.90691e+02);
95 fAngleEffect10->SetParameter(1,-6.62258e+01);
96 fAngleEffect10->SetParameter(2,+1.28247e+01);
97 // Angle effect: Normalisation form theta=10 degres to theta between 0 and 10 (Khalil BOUDJEMLINE sep 2003 Ph.D Thesis)
98 // Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
99 fAngleEffectNorma = new TF1("AngleEffectNorma","[0]+[1]*x+[2]*x*x+[3]*x*x*x",0.0,10.0);
100 fAngleEffectNorma->SetParameter(0,4.148);
101 fAngleEffectNorma->SetParameter(1,-6.809e-01);
102 fAngleEffectNorma->SetParameter(2,5.151e-02);
103 fAngleEffectNorma->SetParameter(3,-1.490e-03);
105 // Define the global transformation:
106 // Transformation from the old ALICE coordinate system to a new one:
108 TGeoRotation* rotGlobal
109 = new TGeoRotation("rotGlobal", 90., 180., 90., 90., 180., 0.);
110 fGlobalTransformation = new TGeoCombiTrans(0., 0., 0., rotGlobal);
113 //___________________________________________
114 AliMUONv1::~AliMUONv1()
118 delete fGlobalTransformation;
121 //__________________________________________________
122 void AliMUONv1::CreateGeometry()
125 // Construct geometry using geometry builders.
128 for (Int_t i=0; i<fGeometryBuilders->GetEntriesFast(); i++) {
131 AliMUONVGeometryBuilder* builder
132 = (AliMUONVGeometryBuilder*)fGeometryBuilders->At(i);
134 // Create geometry with each builder
136 builder->CreateGeometry();
137 builder->SetTransformations();
141 for (Int_t j=0; j<AliMUONConstants::NCh(); j++) {
143 AliMUONChamberGeometry* geometry = Chamber(j).GetGeometry();
145 if (!geometry) continue;
146 // Skip chambers with not defined geometry
148 // Loop over envelopes
149 const TObjArray* kEnvelopes = geometry->GetEnvelopes();
150 for (Int_t k=0; k<kEnvelopes->GetEntriesFast(); k++) {
153 AliMUONGeometryEnvelope* env = (AliMUONGeometryEnvelope*)kEnvelopes->At(k);
154 const TGeoCombiTrans* kEnvTrans = env->GetTransformation();
156 if (env->IsVirtual() && env->GetConstituents()->GetEntriesFast() == 0 ) {
157 // virtual envelope + nof constituents = 0
159 // empty virtual envelope has no sense
160 Fatal("CreateGeometry", "Virtual envelope must have constituents.");
164 if (!env->IsVirtual() && env->GetConstituents()->GetEntriesFast() > 0 ) {
165 // non virtual envelope + nof constituents > 0
167 // use VMC to place constituents
168 Fatal("CreateGeometry", "Non virtual envelope cannot have constituents.");
172 if (!env->IsVirtual() && env->GetConstituents()->GetEntriesFast() == 0 ) {
173 // non virtual envelope + nof constituents = 0
174 // => place envelope in ALICE by composed transformation:
175 // Tglobal * Tch * Tenv
177 // Compound chamber transformation with the envelope one
179 = (*fGlobalTransformation) *
180 (*geometry->GetTransformation()) *
182 PlaceVolume(env->GetName(), geometry->GetMotherVolume(),
183 env->GetCopyNo(), total, 0, 0);
186 if (env->IsVirtual() && env->GetConstituents()->GetEntriesFast() > 0 ) {
187 // virtual envelope + nof constituents > 0
188 // => do not place envelope and place constituents
189 // in ALICE by composed transformation:
190 // Tglobal * Tch * Tenv * Tconst
192 for (Int_t l=0; l<env->GetConstituents()->GetEntriesFast(); l++) {
193 AliMUONGeometryConstituent* constituent
194 = (AliMUONGeometryConstituent*)env->GetConstituents()->At(l);
196 // Compound chamber transformation with the envelope one + the constituent one
198 = (*fGlobalTransformation) *
199 (*geometry->GetTransformation()) *
201 (*constituent->GetTransformation());
203 PlaceVolume(constituent->GetName(), geometry->GetMotherVolume(),
204 constituent->GetCopyNo(), total,
205 constituent->GetNpar(), constituent->GetParam());
211 //__________________________________________________________________
212 Int_t AliMUONv1::GetChamberId(Int_t volId) const
214 // Check if the volume with specified volId is a sensitive volume (gas)
215 // of some chamber and returns the chamber number;
216 // if not sensitive volume - return 0.
220 for (Int_t i = 1; i <= AliMUONConstants::NCh(); i++)
221 if (volId==((AliMUONChamber*)(*fChambers)[i-1])->GetGid()) return i;
223 for (Int_t i = 1; i <= AliMUONConstants::NCh(); i++)
224 if ( ((AliMUONChamber*)(*fChambers)[i-1])->IsSensId(volId) ) return i;
228 //________________________________________________________________
229 void AliMUONv1::CreateMaterials()
232 // *** DEFINITION OF AVAILABLE MUON MATERIALS ***
234 // Ar-CO2 gas (80%+20%)
235 Float_t ag1[3] = { 39.95,12.01,16. };
236 Float_t zg1[3] = { 18.,6.,8. };
237 Float_t wg1[3] = { .8,.0667,.13333 };
238 Float_t dg1 = .001821;
240 // Ar-buthane-freon gas -- trigger chambers
241 Float_t atr1[4] = { 39.95,12.01,1.01,19. };
242 Float_t ztr1[4] = { 18.,6.,1.,9. };
243 Float_t wtr1[4] = { .56,.1262857,.2857143,.028 };
244 Float_t dtr1 = .002599;
247 Float_t agas[3] = { 39.95,12.01,16. };
248 Float_t zgas[3] = { 18.,6.,8. };
249 Float_t wgas[3] = { .74,.086684,.173316 };
250 Float_t dgas = .0018327;
252 // Ar-Isobutane gas (80%+20%) -- tracking
253 Float_t ag[3] = { 39.95,12.01,1.01 };
254 Float_t zg[3] = { 18.,6.,1. };
255 Float_t wg[3] = { .8,.057,.143 };
256 Float_t dg = .0019596;
258 // Ar-Isobutane-Forane-SF6 gas (49%+7%+40%+4%) -- trigger
259 Float_t atrig[5] = { 39.95,12.01,1.01,19.,32.066 };
260 Float_t ztrig[5] = { 18.,6.,1.,9.,16. };
261 Float_t wtrig[5] = { .49,1.08,1.5,1.84,0.04 };
262 Float_t dtrig = .0031463;
266 Float_t abak[3] = {12.01 , 1.01 , 16.};
267 Float_t zbak[3] = {6. , 1. , 8.};
268 Float_t wbak[3] = {6. , 6. , 1.};
271 Float_t epsil, stmin, deemax, tmaxfd, stemax;
273 Int_t iSXFLD = gAlice->Field()->Integ();
274 Float_t sXMGMX = gAlice->Field()->Max();
276 // --- Define the various materials for GEANT ---
277 AliMaterial(9, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
278 AliMaterial(10, "ALUMINIUM$", 26.98, 13., 2.7, 8.9, 37.2);
279 AliMaterial(15, "AIR$ ", 14.61, 7.3, .001205, 30423.24, 67500);
280 AliMixture(19, "Bakelite$", abak, zbak, dbak, -3, wbak);
281 AliMixture(20, "ArC4H10 GAS$", ag, zg, dg, 3, wg);
282 AliMixture(21, "TRIG GAS$", atrig, ztrig, dtrig, -5, wtrig);
283 AliMixture(22, "ArCO2 80%$", ag1, zg1, dg1, 3, wg1);
284 AliMixture(23, "Ar-freon $", atr1, ztr1, dtr1, 4, wtr1);
285 AliMixture(24, "ArCO2 GAS$", agas, zgas, dgas, 3, wgas);
286 // materials for slat:
287 // Sensitive area: gas (already defined)
289 // insulating material and frame: vetronite
290 // walls: carbon, rohacell, carbon
291 Float_t aglass[5]={12.01, 28.09, 16., 10.8, 23.};
292 Float_t zglass[5]={ 6., 14., 8., 5., 11.};
293 Float_t wglass[5]={ 0.5, 0.105, 0.355, 0.03, 0.01};
296 // rohacell: C9 H13 N1 O2
297 Float_t arohac[4] = {12.01, 1.01, 14.010, 16.};
298 Float_t zrohac[4] = { 6., 1., 7., 8.};
299 Float_t wrohac[4] = { 9., 13., 1., 2.};
300 Float_t drohac = 0.03;
302 AliMaterial(31, "COPPER$", 63.54, 29., 8.96, 1.4, 0.);
303 AliMixture(32, "Vetronite$",aglass, zglass, dglass, 5, wglass);
304 AliMaterial(33, "Carbon$", 12.01, 6., 2.265, 18.8, 49.9);
305 AliMixture(34, "Rohacell$", arohac, zrohac, drohac, -4, wrohac);
308 epsil = .001; // Tracking precision,
309 stemax = -1.; // Maximum displacement for multiple scat
310 tmaxfd = -20.; // Maximum angle due to field deflection
311 deemax = -.3; // Maximum fractional energy loss, DLS
315 AliMedium(1, "AIR_CH_US ", 15, 1, iSXFLD, sXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
319 AliMedium(4, "ALU_CH_US ", 9, 0, iSXFLD, sXMGMX, tmaxfd, fMaxStepAlu,
320 fMaxDestepAlu, epsil, stmin);
321 AliMedium(5, "ALU_CH_US ", 10, 0, iSXFLD, sXMGMX, tmaxfd, fMaxStepAlu,
322 fMaxDestepAlu, epsil, stmin);
326 AliMedium(6, "AR_CH_US ", 20, 1, iSXFLD, sXMGMX, tmaxfd, fMaxStepGas,
327 fMaxDestepGas, epsil, stmin);
329 // Ar-Isobuthane-Forane-SF6 gas
331 AliMedium(7, "GAS_CH_TRIGGER ", 21, 1, iSXFLD, sXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
333 AliMedium(8, "BAKE_CH_TRIGGER ", 19, 0, iSXFLD, sXMGMX, tmaxfd, fMaxStepAlu,
334 fMaxDestepAlu, epsil, stmin);
336 AliMedium(9, "ARG_CO2 ", 22, 1, iSXFLD, sXMGMX, tmaxfd, fMaxStepGas,
337 fMaxDestepAlu, epsil, stmin);
338 // tracking media for slats: check the parameters!!
339 AliMedium(11, "PCB_COPPER ", 31, 0, iSXFLD, sXMGMX, tmaxfd,
340 fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
341 AliMedium(12, "VETRONITE ", 32, 0, iSXFLD, sXMGMX, tmaxfd,
342 fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
343 AliMedium(13, "CARBON ", 33, 0, iSXFLD, sXMGMX, tmaxfd,
344 fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
345 AliMedium(14, "Rohacell ", 34, 0, iSXFLD, sXMGMX, tmaxfd,
346 fMaxStepAlu, fMaxDestepAlu, epsil, stmin);
350 //.Materials specific to stations
351 // created via builders
353 for (Int_t i=0; i<fGeometryBuilders->GetEntriesFast(); i++) {
356 AliMUONVGeometryBuilder* builder
357 = (AliMUONVGeometryBuilder*)fGeometryBuilders->At(i);
359 // Create materials with each builder
360 if (builder) builder->CreateMaterials();
364 //______________________________________________________________________________
365 void AliMUONv1::PlaceVolume(const TString& name, const TString& mName,
366 Int_t copyNo, const TGeoHMatrix& matrix,
367 Int_t npar, Double_t* param) const
369 // Place the volume specified by name with the given transformation matrix
372 // Do not apply global transformation
373 // if mother volume == DDIP
374 // (as it is applied on this volume)
375 TGeoHMatrix transform(matrix);
376 if (mName == TString("DDIP")) {
377 transform = (*fGlobalTransformation) * transform;
378 // To be changed to (*fGlobalTransformation).inverse()
379 // when available in TGeo
380 // To make this correct also for a general case when
381 // (*fGlobalTransformation) * *fGlobalTransformation) != 1
384 // Decompose transformation
385 const Double_t* xyz = transform.GetTranslation();
386 const Double_t* rm = transform.GetRotationMatrix();
388 //cout << "Got translation: "
389 // << xyz[0] << " " << xyz[1] << " " << xyz[2] << endl;
391 //cout << "Got rotation: "
392 // << rm[0] << " " << rm[1] << " " << rm[2] << endl
393 // << rm[3] << " " << rm[4] << " " << rm[5] << endl
394 // << rm[6] << " " << rm[7] << " " << rm[8] << endl;
396 // Check for presence of rotation
397 // (will be nice to be available in TGeo)
398 const Double_t kTolerance = 1e-04;
399 Bool_t isRotation = true;
400 if (TMath::Abs(rm[0] - 1.) < kTolerance &&
401 TMath::Abs(rm[1] - 0.) < kTolerance &&
402 TMath::Abs(rm[2] - 0.) < kTolerance &&
403 TMath::Abs(rm[3] - 0.) < kTolerance &&
404 TMath::Abs(rm[4] - 1.) < kTolerance &&
405 TMath::Abs(rm[5] - 0.) < kTolerance &&
406 TMath::Abs(rm[6] - 0.) < kTolerance &&
407 TMath::Abs(rm[7] - 0.) < kTolerance &&
408 TMath::Abs(rm[8] - 1.) < kTolerance) isRotation = false;
413 rot.SetMatrix(const_cast<Double_t*>(transform.GetRotationMatrix()));
414 Double_t theta1, phi1, theta2, phi2, theta3, phi3;
415 rot.GetAngles(theta1, phi1, theta2, phi2, theta3, phi3);
418 // << theta1 << " " << phi1 << " "
419 // << theta2 << " " << phi2 << " "
420 // << theta3 << " " << phi3 << endl;
422 AliMatrix(krot, theta1, phi1, theta2, phi2, theta3, phi3);
425 // Place the volume in ALIC
427 gMC->Gspos(name, copyNo, mName, xyz[0], xyz[1], xyz[2] , krot, "ONLY");
429 gMC->Gsposp(name, copyNo, mName, xyz[0], xyz[1], xyz[2] , krot, "ONLY",
434 //___________________________________________
435 void AliMUONv1::Init()
438 // Initialize Tracking Chambers
441 if(fDebug) printf("\n%s: Start Init for version 1 - CPC chamber type\n\n",ClassName());
443 for (i=0; i<AliMUONConstants::NCh(); i++) {
444 ( (AliMUONChamber*) (*fChambers)[i])->Init();
448 // Set the chamber (sensitive region) GEANT identifier
450 for (Int_t i=0; i<fGeometryBuilders->GetEntriesFast(); i++) {
453 AliMUONVGeometryBuilder* builder
454 = (AliMUONVGeometryBuilder*)fGeometryBuilders->At(i);
456 // Set sesitive volumes with each builder
457 if (builder) builder->SetSensitiveVolumes();
462 // Set the chamber (sensitive region) GEANT identifier
463 ((AliMUONChamber*)(*fChambers)[0])->SetGid(gMC->VolId("S01G"));
464 ((AliMUONChamber*)(*fChambers)[1])->SetGid(gMC->VolId("S02G"));
466 ((AliMUONChamber*)(*fChambers)[2])->SetGid(gMC->VolId("S03G"));
467 ((AliMUONChamber*)(*fChambers)[3])->SetGid(gMC->VolId("S04G"));
469 ((AliMUONChamber*)(*fChambers)[4])->SetGid(gMC->VolId("S05G"));
470 ((AliMUONChamber*)(*fChambers)[5])->SetGid(gMC->VolId("S06G"));
472 ((AliMUONChamber*)(*fChambers)[6])->SetGid(gMC->VolId("S07G"));
473 ((AliMUONChamber*)(*fChambers)[7])->SetGid(gMC->VolId("S08G"));
475 ((AliMUONChamber*)(*fChambers)[8])->SetGid(gMC->VolId("S09G"));
476 ((AliMUONChamber*)(*fChambers)[9])->SetGid(gMC->VolId("S10G"));
478 ((AliMUONChamber*)(*fChambers)[10])->SetGid(gMC->VolId("SG1A"));
479 ((AliMUONChamber*)(*fChambers)[11])->SetGid(gMC->VolId("SG2A"));
480 ((AliMUONChamber*)(*fChambers)[12])->SetGid(gMC->VolId("SG3A"));
481 ((AliMUONChamber*)(*fChambers)[13])->SetGid(gMC->VolId("SG4A"));
483 if(fDebug) printf("\n%s: Finished Init for version 1 - CPC chamber type\n",ClassName());
486 if(fDebug) printf("\n%s: Start Init for Trigger Circuits\n",ClassName());
487 for (i=0; i<AliMUONConstants::NTriggerCircuit(); i++) {
488 ( (AliMUONTriggerCircuit*) (*fTriggerCircuits)[i])->Init(i);
490 if(fDebug) printf("%s: Finished Init for Trigger Circuits\n",ClassName());
494 //_______________________________________________________________________________
495 void AliMUONv1::StepManager()
497 // Stepmanager for the chambers
499 if (fStepManagerVersionOld) {
504 // Only charged tracks
505 if( !(gMC->TrackCharge()) ) return;
506 // Only charged tracks
508 // Only gas gap inside chamber
509 // Tag chambers and record hits when track enters
510 static Int_t idvol=-1;
514 const Float_t kBig = 1.e10;
518 // Only gas gap inside chamber
519 // Tag chambers and record hits when track enters
520 id=gMC->CurrentVolID(copy);
521 iChamber = GetChamberId(id);
524 if (idvol == -1) return;
526 if( gMC->IsTrackEntering() ) {
527 Float_t theta = fTrackMomentum.Theta();
528 if ((TMath::Pi()-theta)*kRaddeg>=15.) gMC->SetMaxStep(fStepMaxInActiveGas); // We use Pi-theta because z is negative
532 // Float_t z = ( (AliMUONChamber*)(*fChambers)[idvol])->Z() ;
533 // Info("StepManager Step","Active volume found %d chamber %d Z chamber is %f ",idvol,iChamber, z);
535 // Particule id and mass,
536 Int_t ipart = gMC->TrackPid();
537 Float_t mass = gMC->TrackMass();
539 fDestepSum[idvol]+=gMC->Edep();
540 // Get current particle id (ipart), track position (pos) and momentum (mom)
541 if ( fStepSum[idvol]==0.0 ) gMC->TrackMomentum(fTrackMomentum);
542 fStepSum[idvol]+=gMC->TrackStep();
545 // Info("StepManager Step","iChamber %d, Particle %d, theta %f phi %f mass %f StepSum %f eloss %g",
546 // iChamber,ipart, fTrackMomentum.Theta()*kRaddeg, fTrackMomentum.Phi()*kRaddeg, mass, fStepSum[idvol], gMC->Edep());
547 // Info("StepManager Step","Track Momentum %f %f %f", fTrackMomentum.X(), fTrackMomentum.Y(), fTrackMomentum.Z()) ;
548 // gMC->TrackPosition(fTrackPosition);
549 // Info("StepManager Step","Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()) ;
552 // Track left chamber or StepSum larger than fStepMaxInActiveGas
553 if ( gMC->IsTrackExiting() ||
554 gMC->IsTrackStop() ||
555 gMC->IsTrackDisappeared()||
556 (fStepSum[idvol]>fStepMaxInActiveGas) ) {
558 if ( gMC->IsTrackExiting() ||
559 gMC->IsTrackStop() ||
560 gMC->IsTrackDisappeared() ) gMC->SetMaxStep(kBig);
562 gMC->TrackPosition(fTrackPosition);
563 Float_t theta = fTrackMomentum.Theta();
564 Float_t phi = fTrackMomentum.Phi();
566 TLorentzVector backToWire( fStepSum[idvol]/2.*sin(theta)*cos(phi),
567 fStepSum[idvol]/2.*sin(theta)*sin(phi),
568 fStepSum[idvol]/2.*cos(theta),0.0 );
570 // Info("StepManager Exit","Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()) ;
572 // Info("StepManager Exit ","Track backToWire %f %f %f",backToWire.X(),backToWire.Y(),backToWire.Z()) ;
573 fTrackPosition-=backToWire;
575 //-------------- Angle effect
576 // Ratio between energy loss of particle and Mip as a function of BetaGamma of particle (Energy/Mass)
578 Float_t BetaxGamma = fTrackMomentum.P()/mass;// pc/mc2
579 Float_t sigmaEffect10degrees;
580 Float_t sigmaEffectThetadegrees;
581 Float_t eLossParticleELossMip;
582 Float_t yAngleEffect=0.;
583 Float_t thetawires = TMath::Abs( TMath::ASin( TMath::Sin(TMath::Pi()-theta) * TMath::Sin(phi) ) );// We use Pi-theta because z is negative
587 if ( (BetaxGamma >3.2) && (thetawires*kRaddeg<=15.) ) {
588 BetaxGamma=TMath::Log(BetaxGamma);
589 eLossParticleELossMip = fElossRatio->Eval(BetaxGamma);
590 // 10 degrees is a reference for a model (arbitrary)
591 sigmaEffect10degrees=fAngleEffect10->Eval(eLossParticleELossMip);// in micrometers
592 // Angle with respect to the wires assuming that chambers are perpendicular to the z axis.
593 sigmaEffectThetadegrees = sigmaEffect10degrees/fAngleEffectNorma->Eval(thetawires*kRaddeg); // For 5mm gap
594 if ( (iChamber==1) || (iChamber==2) )
595 sigmaEffectThetadegrees/=(1.09833e+00+1.70000e-02*(thetawires*kRaddeg)); // The gap is different (4mm)
596 yAngleEffect=1.e-04*gRandom->Gaus(0,sigmaEffectThetadegrees); // Error due to the angle effect in cm
600 // One hit per chamber
601 GetMUONData()->AddHit(fIshunt, gAlice->GetMCApp()->GetCurrentTrackNumber(), iChamber, ipart,
602 fTrackPosition.X(), fTrackPosition.Y()+yAngleEffect, fTrackPosition.Z(), 0.0,
603 fTrackMomentum.P(),theta, phi, fStepSum[idvol], fDestepSum[idvol],
604 fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z());
606 // Info("StepManager Exit","Particle exiting from chamber %d",iChamber);
607 // Info("StepManager Exit","StepSum %f eloss geant %g ",fStepSum[idvol],fDestepSum[idvol]);
608 // Info("StepManager Exit","Track Position %f %f %f",fTrackPosition.X(),fTrackPosition.Y(),fTrackPosition.Z()) ;
610 fStepSum[idvol] =0; // Reset for the next event
611 fDestepSum[idvol]=0; // Reset for the next event
615 //__________________________________________
616 void AliMUONv1::StepManagerOld()
618 // Old Stepmanager for the chambers
620 static Int_t idvol =-1;
626 Float_t destep, step;
628 static Float_t sstep;
629 static Float_t eloss, eloss2, xhit, yhit, zhit, tof, tlength;
630 const Float_t kBig = 1.e10;
631 static Float_t hits[15];
633 TClonesArray &lhits = *fHits;
637 // Only charged tracks
638 if( !(gMC->TrackCharge()) ) return;
640 // Only gas gap inside chamber
641 // Tag chambers and record hits when track enters
642 id=gMC->CurrentVolID(copy);
643 vol[0] = GetChamberId(id);
646 if (idvol == -1) return;
649 // Get current particle id (ipart), track position (pos) and momentum (mom)
650 gMC->TrackPosition(pos);
651 gMC->TrackMomentum(mom);
653 ipart = gMC->TrackPid();
656 // momentum loss and steplength in last step
657 destep = gMC->Edep();
658 step = gMC->TrackStep();
659 // cout<<"------------"<<step<<endl;
661 // record hits when track enters ...
662 if( gMC->IsTrackEntering()) {
664 gMC->SetMaxStep(fMaxStepGas);
665 Double_t tc = mom[0]*mom[0]+mom[1]*mom[1];
666 Double_t rt = TMath::Sqrt(tc);
667 Double_t pmom = TMath::Sqrt(tc+mom[2]*mom[2]);
668 Double_t tx = mom[0]/pmom;
669 Double_t ty = mom[1]/pmom;
670 Double_t tz = mom[2]/pmom;
671 Double_t s = ((AliMUONChamber*)(*fChambers)[idvol])
674 theta = Float_t(TMath::ATan2(rt,Double_t(mom[2])))*kRaddeg;
675 phi = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
676 hits[0] = Float_t(ipart); // Geant3 particle type
677 hits[1] = pos[0]+s*tx; // X-position for hit
678 hits[2] = pos[1]+s*ty; // Y-position for hit
679 hits[3] = pos[2]+s*tz; // Z-position for hit
680 hits[4] = theta; // theta angle of incidence
681 hits[5] = phi; // phi angle of incidence
682 hits[8] = 0;//PadHits does not exist anymore (Float_t) fNPadHits; // first padhit
683 hits[9] = -1; // last pad hit
684 hits[10] = mom[3]; // hit momentum P
685 hits[11] = mom[0]; // Px
686 hits[12] = mom[1]; // Py
687 hits[13] = mom[2]; // Pz
688 tof=gMC->TrackTime();
689 hits[14] = tof; // Time of flight
697 Chamber(idvol).ChargeCorrelationInit();
698 // Only if not trigger chamber
700 // printf("---------------------------\n");
701 // printf(">>>> Y = %f \n",hits[2]);
702 // printf("---------------------------\n");
706 // if(idvol < AliMUONConstants::NTrackingCh()) {
708 // // Initialize hit position (cursor) in the segmentation model
709 // ((AliMUONChamber*) (*fChambers)[idvol])
710 // ->SigGenInit(pos[0], pos[1], pos[2]);
712 // //geant3->Gpcxyz();
713 // //printf("In the Trigger Chamber #%d\n",idvol-9);
719 // cout<<sstep<<endl;
722 // Calculate the charge induced on a pad (disintegration) in case
724 // Mip left chamber ...
725 if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
726 gMC->SetMaxStep(kBig);
732 Float_t globalPos[3] = {pos[0], pos[1], pos[2]};
733 gMC->Gmtod(globalPos,localPos,1);
735 if(idvol < AliMUONConstants::NTrackingCh()) {
737 x0 = 0.5*(xhit+pos[0]);
738 y0 = 0.5*(yhit+pos[1]);
739 z0 = 0.5*(zhit+pos[2]);
748 // if (eloss >0) MakePadHits(x0,y0,z0,eloss,tof,idvol);
751 hits[6] = tlength; // track length
752 hits[7] = eloss2; // de/dx energy loss
755 // if (fNPadHits > (Int_t)hits[8]) {
756 // hits[8] = hits[8]+1;
757 // hits[9] = 0: // PadHits does not exist anymore (Float_t) fNPadHits;
763 AliMUONHit(fIshunt, gAlice->GetMCApp()->GetCurrentTrackNumber(), vol,hits);
766 // Check additional signal generation conditions
767 // defined by the segmentation
768 // model (boundary crossing conditions)
769 // only for tracking chambers
771 ((idvol < AliMUONConstants::NTrackingCh()) &&
772 ((AliMUONChamber*) (*fChambers)[idvol])->SigGenCond(pos[0], pos[1], pos[2]))
774 ((AliMUONChamber*) (*fChambers)[idvol])
775 ->SigGenInit(pos[0], pos[1], pos[2]);
778 Float_t globalPos[3] = {pos[0], pos[1], pos[2]};
779 gMC->Gmtod(globalPos,localPos,1);
783 // if (eloss > 0 && idvol < AliMUONConstants::NTrackingCh())
784 // MakePadHits(0.5*(xhit+pos[0]),0.5*(yhit+pos[1]),pos[2],eloss,tof,idvol);
791 // nothing special happened, add up energy loss