1 /**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
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 purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
18 //////////////////////////////////////////////////////////////////////
20 // (V-zero) detector version 6 as designed by the Lyon group //
21 // All comments should be sent to Brigitte CHEYNIS : //
22 // b.cheynis@ipnl.in2p3.fr //
23 // Geometry of september 2005 done with ROOT geometrical modeler // //
24 // V0R (now V0C) sits between Z values -89.5 and -84.8 cm //
25 // V0L (now V0A) sits between Z values +339.0 and +341.0 cm //
26 // New coordinate system has been implemented in october 2003 //
28 //////////////////////////////////////////////////////////////////////
30 #include "AliVZEROv6.h"
34 //_____________________________________________________________________________
35 AliVZEROv6:: AliVZEROv6():AliVZERO()
37 // Standard default constructor
40 //_____________________________________________________________________________
41 AliVZEROv6::AliVZEROv6(const char *name, const char *title):
45 // Standard constructor for V-zero Detector version 6
47 AliDebug(2,"Create VZERO object ");
49 fVersion = 6; // version number
51 // Parameters related to geometry :
52 // V0 part in front of muon arm absorber
54 fV0CHeight1 = 2.5; // height of cell 1, in cm
55 fV0CHeight2 = 4.4; // height of cell 2, in cm
56 fV0CHeight3 = 7.4; // height of cell 3, in cm
57 fV0CHeight4 = 12.5; // height of cell 4, in cm
59 fV0CRBox = 38.0; // outer radius of box, in cm
60 fV0CLidThickness = 0.30; // thickness of Carbon lid
61 fV0CCellThickness = 2.00; // thickness of elementary cell
62 fV0CBoxThickness = 4.70; // thickness of V0C Box
63 fV0COffsetFibers = 1.0; // offset to output fibers, in cm
65 // V0 part on the other side with respect to Interaction Point
67 fV0AHeight1 = 3.3; // height of cell 1, in cm
68 fV0AHeight2 = 6.2; // height of cell 2, in cm
69 fV0AHeight3 = 8.9; // height of cell 3, in cm
70 fV0AHeight4 = 20.9; // height of cell 4, in cm
72 fV0ACellThickness = 2.00; // thickness of elementary cell
74 // Parameters related to light output :
76 fLightYield = 93.75; // Light yield in BC408 (93.75 eV per photon)
77 fLightAttenuation = 0.05; // Light attenuation in fiber (0.05 per meter)
78 fnMeters = 15.0; // Number of meters of clear fibers to PM
79 fFibToPhot = 0.3; // Attenuation at fiber-photocathode interface
82 //_____________________________________________________________________________
84 void AliVZEROv6::BuildGeometry()
89 //_____________________________________________________________________________
90 void AliVZEROv6::CreateGeometry()
93 // Constructs TGeo geometry
95 const int kColorVZERO = kGreen;
97 AliDebug(2,"VZERO ConstructGeometry");
99 // TGeoMedium *medAir = gGeoManager->GetMedium("VZERO_Air");
100 TGeoMedium *medAlu = gGeoManager->GetMedium("VZERO_Aluminum");
101 TGeoMedium *medCar = gGeoManager->GetMedium("VZERO_Carbon");
102 TGeoMedium *medSci = gGeoManager->GetMedium("VZERO_Scintillator");
104 TGeoVolume *top = gGeoManager->GetVolume("ALIC");
106 Float_t heightRight, r4Right;
108 Float_t zdet = 90.0 - 0.5 - fV0CBoxThickness/2.0;
109 heightRight = fV0CHeight1 + fV0CHeight2 + fV0CHeight3 + fV0CHeight4;
110 r4Right = fV0CRMin + heightRight + 3.0*0.2; // 3 spacings of 2mm between rings
112 // Creation of assembly V0RI - right part - :
114 TGeoVolume *v0RI = new TGeoVolumeAssembly("V0RI");
115 TGeoTranslation *tr1 = new TGeoTranslation(0.,0.,-zdet);
116 top->AddNode(v0RI,1,tr1);
118 // Creation of carbon lids (3.0 mm thick) to keep V0C box shut :
122 partube[0] = fV0CRMin;
123 partube[1] = fV0CRBox;
124 partube[2] = fV0CLidThickness/2.0;
126 TGeoTube *sV0CA = new TGeoTube("V0CA", partube[0], partube[1], partube[2]);
127 TGeoVolume *v0CA = new TGeoVolume("V0CA",sV0CA,medCar);
128 TGeoTranslation *tr2 = new TGeoTranslation(0.,0., fV0CBoxThickness/2.0-partube[2]);
129 TGeoTranslation *tr3 = new TGeoTranslation(0.,0.,-fV0CBoxThickness/2.0+partube[2]);
130 v0RI->AddNode(v0CA,1,tr2);
131 v0RI->AddNode(v0CA,2,tr3);
132 v0CA->SetLineColor(kYellow);
134 // Creation of aluminum rings 3.0 mm thick to maintain the v0RI pieces :
136 partube[0] = fV0CRMin - 0.3;
137 partube[1] = fV0CRMin;
138 partube[2] = fV0CBoxThickness/2.0;
140 TGeoTube *sV0IR = new TGeoTube("V0IR", partube[0], partube[1], partube[2]);
141 TGeoVolume *v0IR = new TGeoVolume("V0IR",sV0IR,medAlu);
142 v0RI->AddNode(v0IR,1,0);
143 v0IR->SetLineColor(kYellow);
145 partube[0] = fV0CRBox;
146 partube[1] = fV0CRBox + 0.3;
147 partube[2] = fV0CBoxThickness/2.0;
149 TGeoTube *sV0ER = new TGeoTube("V0ER", partube[0], partube[1], partube[2]);
150 TGeoVolume *v0ER = new TGeoVolume("V0ER",sV0ER,medAlu);
151 v0RI->AddNode(v0ER,1,0);
152 v0ER->SetLineColor(kYellow);
154 // Creation of assembly V0R0 of scintillator cells within one sector
156 TGeoVolume *v0R0 = new TGeoVolumeAssembly("V0R0");
158 // Elementary cell of ring 1 - right part - :
159 // (cells of ring 1 will be shifted by 2.0 cm backwards to output fibers)
161 Float_t r1Right = fV0CRMin + fV0CHeight1;
162 Float_t offset = fV0CBoxThickness/2.0 - fV0CLidThickness - fV0CCellThickness/2.0;
166 partubs[0] = fV0CRMin;
167 partubs[1] = r1Right;
168 partubs[2] = fV0CCellThickness/2.0;
169 partubs[3] = 90.0-22.5;
170 partubs[4] = 135.0-22.5;
172 TGeoTubeSeg *sV0R1 = new TGeoTubeSeg("V0R1", partubs[0], partubs[1], partubs[2],
173 partubs[3], partubs[4]);
174 TGeoVolume *v0R1 = new TGeoVolume("V0R1",sV0R1,medSci);
175 TGeoTranslation *tr4 = new TGeoTranslation(0.,0.,-offset);
176 v0R0->AddNode(v0R1,1,tr4);
177 v0R1->SetLineColor(kColorVZERO);
179 // Elementary cell of ring 2 - right part - :
180 // (cells of ring 2 will be shifted by 1.0 cm backwards to output fibers)
182 Float_t r2Right = r1Right + fV0CHeight2;
184 partubs[0] = r1Right; // must be equal to 7.1
185 partubs[1] = r2Right; // must be equal to 11.5
186 TGeoTubeSeg *sV0R2 = new TGeoTubeSeg("V0R2", partubs[0], partubs[1], partubs[2],
187 partubs[3], partubs[4]);
188 TGeoVolume *v0R2 = new TGeoVolume("V0R2",sV0R2,medSci);
189 TGeoTranslation *tr5 = new TGeoTranslation(0.0,0.2,-offset + fV0COffsetFibers);
190 v0R0->AddNode(v0R2,1,tr5);
191 v0R2->SetLineColor(kColorVZERO);
193 // Ring 3 - right part - :
195 // Float_t x = TMath::ATan(1.0/156.0) * ((180./TMath::Pi()));
197 r2Right = r2Right + 0.2;
198 Float_t r3Right = r2Right + fV0CHeight3;
199 // printf(" r2 = %f, r3 = %f \n\n", r2Right,r3Right);
201 partubs[0] = r2Right; // must be equal to 11.7
202 partubs[1] = r3Right; // must be equal to 19.1
203 partubs[3] = 90.0-22.5;
204 partubs[4] = 112.5-22.5;
206 TGeoTubeSeg *sV0R3 = new TGeoTubeSeg("V0R3", partubs[0], partubs[1], partubs[2],
207 partubs[3], partubs[4]);
208 TGeoVolume *v0R3 = new TGeoVolume("V0R3",sV0R3,medSci);
209 TGeoTranslation *tr6 = new TGeoTranslation(0.,0.2,-offset + 2.0*fV0COffsetFibers);
210 v0R0->AddNode(v0R3,1,tr6);
211 v0R3->SetLineColor(kColorVZERO);
213 partubs[3] = 112.5-22.5;
214 partubs[4] = 135.0-22.5;
216 TGeoTubeSeg *sV0R4 = new TGeoTubeSeg("V0R4", partubs[0], partubs[1], partubs[2],
217 partubs[3], partubs[4]);
218 TGeoVolume *v0R4 = new TGeoVolume("V0R4",sV0R4,medSci);
219 v0R0->AddNode(v0R4,1,tr6);
220 v0R4->SetLineColor(kColorVZERO);
222 // Ring 4 - right part - :
224 Float_t x = TMath::ATan(3.5/257.5) * ((180./TMath::Pi()));
225 r3Right = r3Right + 0.2 + 0.2; // + 0.2 because no shift in translation here !!
227 partubs[0] = r3Right; // must be equal to 19.5
228 partubs[1] = r4Right; // must be equal to 32.0
229 partubs[3] = 90.0-22.5+x;
230 partubs[4] = 112.5-22.5-x;
232 TGeoTubeSeg *sV0R5 = new TGeoTubeSeg("V0R5", partubs[0], partubs[1], partubs[2],
233 partubs[3], partubs[4]);
234 TGeoVolume *v0R5 = new TGeoVolume("V0R5",sV0R5,medSci);
235 TGeoTranslation *tr7 = new TGeoTranslation(0.,0.0,-offset + 2.0*fV0COffsetFibers);
236 v0R0->AddNode(v0R5,1,tr7);
237 v0R5->SetLineColor(kColorVZERO);
239 partubs[3] = 112.5-22.5+x;
240 partubs[4] = 135.0-22.5-x;
242 TGeoTubeSeg *sV0R6 = new TGeoTubeSeg("V0R6", partubs[0], partubs[1], partubs[2],
243 partubs[3], partubs[4]);
244 TGeoVolume *v0R6 = new TGeoVolume("V0R6",sV0R6,medSci);
245 v0R0->AddNode(v0R6,1,tr7);
246 v0R6->SetLineColor(kColorVZERO);
249 Float_t phiDeg= 180./4.;
251 Int_t nsecR = 1; // number of sectors in right part of V0
252 Int_t ncellsR; // number of scintillating cells
254 for (phi = 22.5; phi < 360.0; phi = phi + phiDeg)
257 TGeoRotation *rot1 = new TGeoRotation("rot1", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
259 v0RI->AddNode(v0R0,nsecR,rot1);
263 ncellsR = (nsecR - 1) * 6; // 6 cells per sector (2 cells in ring 3 and 4)
264 AliInfo(Form("Number of cells on Right side - V0C = %d", ncellsR));
266 // Creation of assembly v0LE - left part - :
267 // Entrance face at +339.0 cm (new coordinate system) ...
269 Float_t heightLeft = fV0AHeight1 + fV0AHeight2 + fV0AHeight3 + fV0AHeight4;
270 Float_t r4Left = fV0ARMin + heightLeft;
272 TGeoVolume *v0LE = new TGeoVolumeAssembly("V0LE");
274 TGeoTranslation *tr8 = new TGeoTranslation(0.,0.,339.0 + fV0ACellThickness/2.0);
275 top->AddNode(v0LE,1,tr8);
277 // Creation of assembly V0L0 of scintillator cells within one sector
279 TGeoVolume *v0L0 = new TGeoVolumeAssembly("V0L0");
282 offsetLeft = - fV0ACellThickness/2.0;
284 Float_t r1Left = fV0ARMin + fV0AHeight1;
286 partubs[0] = fV0ARMin;
288 partubs[2] = fV0ACellThickness/2.0;
289 partubs[3] = 90.0-22.5;
290 partubs[4] = 135.0-22.5;
292 TGeoTubeSeg *sV0L1 = new TGeoTubeSeg("V0L1", partubs[0], partubs[1], partubs[2],
293 partubs[3], partubs[4]);
294 TGeoVolume *v0L1 = new TGeoVolume("V0L1",sV0L1,medSci);
295 v0L0->AddNode(v0L1,1,gGeoIdentity);
296 v0L1->SetLineColor(kColorVZERO);
297 v0L1->SetVisibility(kTRUE);
299 Float_t r2Left = r1Left + fV0AHeight2;
304 TGeoTubeSeg *sV0L2 = new TGeoTubeSeg("V0L2", partubs[0], partubs[1], partubs[2],
305 partubs[3], partubs[4]);
306 TGeoVolume *v0L2 = new TGeoVolume("V0L2",sV0L2,medSci);
307 v0L0->AddNode(v0L2,1,gGeoIdentity);
308 v0L2->SetLineColor(kColorVZERO);
309 v0L2->SetVisibility(kTRUE);
311 Float_t r3Left = r2Left + fV0AHeight3;
316 TGeoTubeSeg *sV0L3 = new TGeoTubeSeg("V0L3", partubs[0], partubs[1], partubs[2],
317 partubs[3], partubs[4]);
318 TGeoVolume *v0L3 = new TGeoVolume("V0L3",sV0L3,medSci);
319 v0L0->AddNode(v0L3,1,gGeoIdentity);
320 v0L3->SetLineColor(kColorVZERO);
321 v0L3->SetVisibility(kTRUE);
326 TGeoTubeSeg *sV0L4 = new TGeoTubeSeg("V0L4", partubs[0], partubs[1], partubs[2],
327 partubs[3], partubs[4]);
328 TGeoVolume *v0L4 = new TGeoVolume("V0L4",sV0L4,medSci);
329 v0L0->AddNode(v0L4,1,gGeoIdentity);
330 v0L4->SetLineColor(kColorVZERO);
331 v0L4->SetVisibility(kTRUE);
333 Int_t nsecL = 1; // number of sectors in left part of V0
334 Int_t ncellsL; // number of scintillating cells
336 for (phi = 22.5; phi < 360.0; phi = phi + phiDeg)
339 TGeoRotation *rot1 = new TGeoRotation("rot1", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
340 v0LE->AddNode(v0L0,nsecL,rot1);
344 ncellsL = (nsecL - 1) * 4; // 4 cells per sector
345 AliInfo(Form("Number of cells on Left side - V0A = %d\n", ncellsL));
347 gGeoManager->SetTopVolume(top);
348 gGeoManager->CloseGeometry();
349 // gGeoManager-> SetVisLevel(4);
352 //_____________________________________________________________________________
353 void AliVZEROv6::CreateMaterials()
356 // Creates materials used for geometry
358 AliDebug(2,"Create materials");
360 // Int_t *idtmed = fIdtmed->GetArray()-2999;
362 Int_t fieldType = gAlice->Field()->Integ(); // Field type
363 Double_t maxField = gAlice->Field()->Max(); // Field max.
364 Double_t maxBending = 0; // Max Angle
365 Double_t maxStepSize = 0.001; // Max step size
366 Double_t maxEnergyLoss = 1; // Max Delta E
367 Double_t precision = 0.001; // Precision
368 Double_t minStepSize = 0.001; // Minimum step size
370 Double_t a, z, density, radLength, absLength;
371 Float_t tmaxfd, stemax, deemax, epsil, stmin;
383 // Parameters for Air (= 0.01% C + 75% N + 23% O + 1% Ar )
385 Float_t aa[] = { 12.0107, 14.0067, 15.9994, 39.948 };
386 Float_t za[] = { 6., 7., 8., 18. };
387 Float_t wa[] = { 0.000124, 0.755267, 0.231781, 0.012827 };
388 density = 0.00120479;
394 AliMixture(id, "Air", aa, za, density, 4, wa);
395 AliMedium(id, "Air", id, 1, fieldType, maxField, maxBending,
396 maxStepSize, maxEnergyLoss, precision, minStepSize);
398 // Parameters for Aluminum
409 AliMaterial( id, "Aluminum", a, z, density, radLength, 37.2, 0, 0);
410 AliMedium(id, "Aluminum", id, 1, fieldType, maxField, maxBending,
411 maxStepSize, maxEnergyLoss, precision, minStepSize);
413 // Parameters for Carbon
420 AliMaterial(id, "Carbon", a, z, density, radLength, 49.9, 0, 0);
421 AliMedium(id, "Carbon", id, 1, fieldType, maxField, maxBending,
422 maxStepSize, maxEnergyLoss, precision, minStepSize);
424 // Parameters for scintillator
426 Float_t as[] = { 1.00794, 12.011};
427 Float_t zs[] = { 1., 6.};
428 Float_t ws[] = { 1., 1.};
435 AliMixture(id, "Scintillator", as, zs, density, -2, ws);
436 AliMedium(id, "Scintillator", id, 1, fieldType, maxField, maxBending,
437 maxStepSize,maxEnergyLoss,precision,minStepSize);
442 //_____________________________________________________________________________
443 void AliVZEROv6::DrawModule() const
446 // Drawing is done in DrawVZERO.C
448 AliDebug(2,"DrawModule");
452 //_____________________________________________________________________________
453 void AliVZEROv6::DrawGeometry()
456 // Drawing of V0 geometry done in DrawV0.C
458 AliDebug(2,"DrawGeometry");
460 // Here is DrawV0.C :
464 // TGeoVolume *top = gGeoManager->GetMasterVolume();
465 // gGeoManager->SetNsegments(80);
466 // Int_t nd = top->GetNdaughters();
467 // for (Int_t i=0; i<nd; i++) top->GetNode(i)->GetVolume()->InvisibleAll();
468 // TGeoVolume *v0ri = gGeoManager->GetVolume("V0RI");
469 // TGeoVolume *v0le = gGeoManager->GetVolume("V0LE");
470 // v0ri->SetVisibility(kTRUE);
471 // v0ri->VisibleDaughters(kTRUE);
472 // v0le->SetVisibility(kTRUE);
473 // v0le->VisibleDaughters(kTRUE);
474 // top->SetVisibility(kTRUE);
480 //_____________________________________________________________________________
481 void AliVZEROv6::Init()
483 // Initialises version of the VZERO Detector given in Config
484 // Just prints an information message
486 AliInfo(Form("VZERO version %d initialized \n",IsVersion()));
491 //_____________________________________________________________________________
492 void AliVZEROv6::StepManager()
495 // Step Manager, called at each step
499 static Float_t hits[21];
500 static Float_t eloss, tlength;
501 static Int_t nPhotonsInStep;
502 static Int_t nPhotons;
503 static Int_t numStep;
505 Float_t destep, step;
509 // We keep only charged tracks :
511 if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
513 vol[0] = gMC->CurrentVolOffID(1, vol[1]);
514 vol[2] = gMC->CurrentVolID(copy);
517 static Int_t idV0R1 = gMC->VolId("V0R1");
518 static Int_t idV0L1 = gMC->VolId("V0L1");
519 static Int_t idV0R2 = gMC->VolId("V0R2");
520 static Int_t idV0L2 = gMC->VolId("V0L2");
521 static Int_t idV0R3 = gMC->VolId("V0R3");
522 static Int_t idV0L3 = gMC->VolId("V0L3");
523 static Int_t idV0R4 = gMC->VolId("V0R4");
524 static Int_t idV0L4 = gMC->VolId("V0L4");
525 static Int_t idV0R5 = gMC->VolId("V0R5");
526 static Int_t idV0R6 = gMC->VolId("V0R6");
528 if ( gMC->CurrentVolID(copy) == idV0R1 ||
529 gMC->CurrentVolID(copy) == idV0L1 )
531 else if ( gMC->CurrentVolID(copy) == idV0R2 ||
532 gMC->CurrentVolID(copy) == idV0L2 )
534 else if ( gMC->CurrentVolID(copy) == idV0R3 ||
535 gMC->CurrentVolID(copy) == idV0R4 ||
536 gMC->CurrentVolID(copy) == idV0L3 )
538 else if ( gMC->CurrentVolID(copy) == idV0R5 ||
539 gMC->CurrentVolID(copy) == idV0R6 ||
540 gMC->CurrentVolID(copy) == idV0L4 )
546 if ( ringNumber > 0.5 ) {
548 destep = gMC->Edep();
549 step = gMC->TrackStep();
551 nPhotonsInStep = Int_t(destep / (fLightYield *1e-9) );
552 nPhotonsInStep = gRandom->Poisson(nPhotonsInStep);
557 if ( gMC->IsTrackEntering() ) {
559 nPhotons = nPhotonsInStep;
560 gMC->TrackPosition(fTrackPosition);
561 gMC->TrackMomentum(fTrackMomentum);
563 Float_t pt = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
564 fTrackMomentum.Py() * fTrackMomentum.Py() );
566 hits[0] = fTrackPosition.X();
567 hits[1] = fTrackPosition.Y();
568 hits[2] = fTrackPosition.Z();
569 hits[3] = Float_t (gMC->TrackPid());
571 hits[4] = gMC->TrackTime();
572 hits[5] = gMC->TrackCharge();
573 hits[6] = fTrackMomentum.Theta()*TMath::RadToDeg();
574 hits[7] = fTrackMomentum.Phi()*TMath::RadToDeg();
575 hits[8] = ringNumber;
578 hits[10] = fTrackMomentum.P();
579 hits[11] = fTrackMomentum.Px();
580 hits[12] = fTrackMomentum.Py();
581 hits[13] = fTrackMomentum.Pz();
583 TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
584 hits[14] = par->Vx();
585 hits[15] = par->Vy();
586 hits[16] = par->Vz();
592 nPhotons = nPhotons + nPhotonsInStep;
594 if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
596 nPhotons = nPhotons - Int_t((Float_t(nPhotons) * fLightAttenuation * fnMeters));
597 nPhotons = nPhotons - Int_t( Float_t(nPhotons) * fFibToPhot);
602 hits[20] = GetCellId (vol, hits);
604 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
617 //_____________________________________________________________________________
618 void AliVZEROv6::AddHit(Int_t track, Int_t *vol, Float_t *hits)
623 TClonesArray &lhits = *fHits;
624 new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
627 //_____________________________________________________________________________
628 void AliVZEROv6::AddDigits(Int_t *tracks, Int_t* digits)
631 // Adds a VZERO digit
633 TClonesArray &ldigits = *fDigits;
634 new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
637 //_____________________________________________________________________________
638 void AliVZEROv6::MakeBranch(Option_t *option)
641 // Creates new branches in the current Root Tree
644 sprintf(branchname,"%s",GetName());
645 AliDebug(2,Form("fBufferSize = %d",fBufferSize));
647 const char *cH = strstr(option,"H");
649 if (fHits && TreeH() && cH) {
650 TreeH()->Branch(branchname,&fHits, fBufferSize);
651 AliDebug(2,Form("Making Branch %s for hits",branchname));
654 const char *cD = strstr(option,"D");
656 if (fDigits && fLoader->TreeD() && cD) {
657 fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
658 AliDebug(2,Form("Making Branch %s for digits",branchname));
663 //_____________________________________________________________________________
664 Int_t AliVZEROv6::GetCellId(Int_t *vol, Float_t *hits)
667 // Returns Id of scintillator cell
668 // Right side from 0 to 47
669 // Left side from 48 to 95
671 // hits[8] = ring number (1 to 4)
672 // vol[1] = copy number (1 to 8)
674 Int_t index = vol[1];
675 Int_t ringNumber = Int_t(hits[8]);
678 // cout << "volID = " << vol[0] << " copy = " << vol[1] << endl;
679 // cout << "X = " << hits[0] << " Y = " << hits[1] << endl;
681 Float_t phi = Float_t(TMath::ATan2(Double_t(hits[1]),Double_t(hits[0])) );
682 Float_t kRaddeg = 180.0/TMath::Pi();
685 if (index < 7) index = index + 8;
689 index = (index - 7) + ( ( ringNumber - 1 ) * 8);}
690 else if(ringNumber >= 3){
691 if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R3")||
692 gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R5") )
693 {index = (index*2 - 14) + ( ( ringNumber - 2 ) * 16); }
694 if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R4")||
695 gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R6") )
696 {index = (index*2 - 13) + ( ( ringNumber - 2 ) * 16); }
701 else if (hits[2] > 0.0){
702 index = (index - 7 + 48) + ( ( ringNumber - 1 ) * 8);
705 // cout << " ring = " << ringNumber << " phi = "<< phi << endl;
706 // cout << " cellID = " << fCellId << endl;
707 // cout << "**********" << endl;