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(),
45 fV0CLidThickness(0.30),
46 fV0CCellThickness(2.00),
47 fV0CBoxThickness(4.70),
48 fV0COffsetFibers(1.0),
54 fV0ACellThickness(2.00),
56 fLightAttenuation(0.05),
61 // Standard default constructor
64 //_____________________________________________________________________________
65 AliVZEROv6::AliVZEROv6(const char *name, const char *title):
76 fV0CLidThickness(0.30),
77 fV0CCellThickness(2.00),
78 fV0CBoxThickness(4.70),
79 fV0COffsetFibers(1.0),
85 fV0ACellThickness(2.00),
87 fLightAttenuation(0.05),
93 // Standard constructor for V-zero Detector version 6
95 AliDebug(2,"Create VZERO object ");
97 fVersion = 6; // version number
99 // Parameters related to geometry :
100 // V0 part in front of muon arm absorber
102 // fV0CHeight1 = 2.5; // height of cell 1, in cm
103 // fV0CHeight2 = 4.4; // height of cell 2, in cm
104 // fV0CHeight3 = 7.4; // height of cell 3, in cm
105 // fV0CHeight4 = 12.5; // height of cell 4, in cm
107 // fV0CRBox = 38.0; // outer radius of box, in cm
108 // fV0CLidThickness = 0.30; // thickness of Carbon lid
109 // fV0CCellThickness = 2.00; // thickness of elementary cell
110 // fV0CBoxThickness = 4.70; // thickness of V0C Box
111 // fV0COffsetFibers = 1.0; // offset to output fibers, in cm
113 // V0 part on the other side with respect to Interaction Point
115 // fV0AHeight1 = 3.3; // height of cell 1, in cm
116 // fV0AHeight2 = 6.2; // height of cell 2, in cm
117 // fV0AHeight3 = 8.9; // height of cell 3, in cm
118 // fV0AHeight4 = 20.9; // height of cell 4, in cm
120 // fV0ACellThickness = 2.00; // thickness of elementary cell
122 // Parameters related to light output :
124 // fLightYield = 93.75; // Light yield in BC408 (93.75 eV per photon)
125 // fLightAttenuation = 0.05; // Light attenuation in fiber (0.05 per meter)
126 // fnMeters = 15.0; // Number of meters of clear fibers to PM
127 // fFibToPhot = 0.3; // Attenuation at fiber-photocathode interface
130 //_____________________________________________________________________________
132 void AliVZEROv6::BuildGeometry()
137 //_____________________________________________________________________________
138 void AliVZEROv6::CreateGeometry()
141 // Constructs TGeo geometry
143 const int kColorVZERO = kGreen;
145 AliDebug(2,"VZERO ConstructGeometry");
147 // TGeoMedium *medAir = gGeoManager->GetMedium("VZERO_Air");
148 TGeoMedium *medAlu = gGeoManager->GetMedium("VZERO_Aluminum");
149 TGeoMedium *medCar = gGeoManager->GetMedium("VZERO_Carbon");
150 TGeoMedium *medSci = gGeoManager->GetMedium("VZERO_Scintillator");
152 TGeoVolume *top = gGeoManager->GetVolume("ALIC");
154 Float_t heightRight, r4Right;
156 Float_t zdet = 90.0 - 0.5 - fV0CBoxThickness/2.0;
157 heightRight = fV0CHeight1 + fV0CHeight2 + fV0CHeight3 + fV0CHeight4;
158 r4Right = fV0CRMin + heightRight + 3.0*0.2; // 3 spacings of 2mm between rings
160 // Creation of assembly V0RI - right part - :
162 TGeoVolume *v0RI = new TGeoVolumeAssembly("V0RI");
163 TGeoTranslation *tr1 = new TGeoTranslation(0.,0.,-zdet);
164 top->AddNode(v0RI,1,tr1);
166 // Creation of carbon lids (3.0 mm thick) to keep V0C box shut :
170 partube[0] = fV0CRMin;
171 partube[1] = fV0CRBox;
172 partube[2] = fV0CLidThickness/2.0;
174 TGeoTube *sV0CA = new TGeoTube("V0CA", partube[0], partube[1], partube[2]);
175 TGeoVolume *v0CA = new TGeoVolume("V0CA",sV0CA,medCar);
176 TGeoTranslation *tr2 = new TGeoTranslation(0.,0., fV0CBoxThickness/2.0-partube[2]);
177 TGeoTranslation *tr3 = new TGeoTranslation(0.,0.,-fV0CBoxThickness/2.0+partube[2]);
178 v0RI->AddNode(v0CA,1,tr2);
179 v0RI->AddNode(v0CA,2,tr3);
180 v0CA->SetLineColor(kYellow);
182 // Creation of aluminum rings 3.0 mm thick to maintain the v0RI pieces :
184 partube[0] = fV0CRMin - 0.3;
185 partube[1] = fV0CRMin;
186 partube[2] = fV0CBoxThickness/2.0;
188 TGeoTube *sV0IR = new TGeoTube("V0IR", partube[0], partube[1], partube[2]);
189 TGeoVolume *v0IR = new TGeoVolume("V0IR",sV0IR,medAlu);
190 v0RI->AddNode(v0IR,1,0);
191 v0IR->SetLineColor(kYellow);
193 partube[0] = fV0CRBox;
194 partube[1] = fV0CRBox + 0.3;
195 partube[2] = fV0CBoxThickness/2.0;
197 TGeoTube *sV0ER = new TGeoTube("V0ER", partube[0], partube[1], partube[2]);
198 TGeoVolume *v0ER = new TGeoVolume("V0ER",sV0ER,medAlu);
199 v0RI->AddNode(v0ER,1,0);
200 v0ER->SetLineColor(kYellow);
202 // Creation of assembly V0R0 of scintillator cells within one sector
204 TGeoVolume *v0R0 = new TGeoVolumeAssembly("V0R0");
206 // Elementary cell of ring 1 - right part - :
207 // (cells of ring 1 will be shifted by 2.0 cm backwards to output fibers)
209 Float_t r1Right = fV0CRMin + fV0CHeight1;
210 Float_t offset = fV0CBoxThickness/2.0 - fV0CLidThickness - fV0CCellThickness/2.0;
214 partubs[0] = fV0CRMin;
215 partubs[1] = r1Right;
216 partubs[2] = fV0CCellThickness/2.0;
217 partubs[3] = 90.0-22.5;
218 partubs[4] = 135.0-22.5;
220 TGeoTubeSeg *sV0R1 = new TGeoTubeSeg("V0R1", partubs[0], partubs[1], partubs[2],
221 partubs[3], partubs[4]);
222 TGeoVolume *v0R1 = new TGeoVolume("V0R1",sV0R1,medSci);
223 TGeoTranslation *tr4 = new TGeoTranslation(0.,0.,-offset);
224 v0R0->AddNode(v0R1,1,tr4);
225 v0R1->SetLineColor(kColorVZERO);
227 // Elementary cell of ring 2 - right part - :
228 // (cells of ring 2 will be shifted by 1.0 cm backwards to output fibers)
230 Float_t r2Right = r1Right + fV0CHeight2;
232 partubs[0] = r1Right; // must be equal to 7.1
233 partubs[1] = r2Right; // must be equal to 11.5
234 TGeoTubeSeg *sV0R2 = new TGeoTubeSeg("V0R2", partubs[0], partubs[1], partubs[2],
235 partubs[3], partubs[4]);
236 TGeoVolume *v0R2 = new TGeoVolume("V0R2",sV0R2,medSci);
237 TGeoTranslation *tr5 = new TGeoTranslation(0.0,0.2,-offset + fV0COffsetFibers);
238 v0R0->AddNode(v0R2,1,tr5);
239 v0R2->SetLineColor(kColorVZERO);
241 // Ring 3 - right part - :
243 // Float_t x = TMath::ATan(1.0/156.0) * ((180./TMath::Pi()));
245 r2Right = r2Right + 0.2;
246 Float_t r3Right = r2Right + fV0CHeight3;
247 // printf(" r2 = %f, r3 = %f \n\n", r2Right,r3Right);
249 partubs[0] = r2Right; // must be equal to 11.7
250 partubs[1] = r3Right; // must be equal to 19.1
251 partubs[3] = 90.0-22.5;
252 partubs[4] = 112.5-22.5;
254 TGeoTubeSeg *sV0R3 = new TGeoTubeSeg("V0R3", partubs[0], partubs[1], partubs[2],
255 partubs[3], partubs[4]);
256 TGeoVolume *v0R3 = new TGeoVolume("V0R3",sV0R3,medSci);
257 TGeoTranslation *tr6 = new TGeoTranslation(0.,0.2,-offset + 2.0*fV0COffsetFibers);
258 v0R0->AddNode(v0R3,1,tr6);
259 v0R3->SetLineColor(kColorVZERO);
261 partubs[3] = 112.5-22.5;
262 partubs[4] = 135.0-22.5;
264 TGeoTubeSeg *sV0R4 = new TGeoTubeSeg("V0R4", partubs[0], partubs[1], partubs[2],
265 partubs[3], partubs[4]);
266 TGeoVolume *v0R4 = new TGeoVolume("V0R4",sV0R4,medSci);
267 v0R0->AddNode(v0R4,1,tr6);
268 v0R4->SetLineColor(kColorVZERO);
270 // Ring 4 - right part - :
272 Float_t x = TMath::ATan(3.5/257.5) * ((180./TMath::Pi()));
273 r3Right = r3Right + 0.2 + 0.2; // + 0.2 because no shift in translation here !!
275 partubs[0] = r3Right; // must be equal to 19.5
276 partubs[1] = r4Right; // must be equal to 32.0
277 partubs[3] = 90.0-22.5+x;
278 partubs[4] = 112.5-22.5-x;
280 TGeoTubeSeg *sV0R5 = new TGeoTubeSeg("V0R5", partubs[0], partubs[1], partubs[2],
281 partubs[3], partubs[4]);
282 TGeoVolume *v0R5 = new TGeoVolume("V0R5",sV0R5,medSci);
283 TGeoTranslation *tr7 = new TGeoTranslation(0.,0.0,-offset + 2.0*fV0COffsetFibers);
284 v0R0->AddNode(v0R5,1,tr7);
285 v0R5->SetLineColor(kColorVZERO);
287 partubs[3] = 112.5-22.5+x;
288 partubs[4] = 135.0-22.5-x;
290 TGeoTubeSeg *sV0R6 = new TGeoTubeSeg("V0R6", partubs[0], partubs[1], partubs[2],
291 partubs[3], partubs[4]);
292 TGeoVolume *v0R6 = new TGeoVolume("V0R6",sV0R6,medSci);
293 v0R0->AddNode(v0R6,1,tr7);
294 v0R6->SetLineColor(kColorVZERO);
297 Float_t phiDeg= 180./4.;
299 Int_t nsecR = 1; // number of sectors in right part of V0
300 Int_t ncellsR; // number of scintillating cells
302 for (phi = 22.5; phi < 360.0; phi = phi + phiDeg)
305 TGeoRotation *rot1 = new TGeoRotation("rot1", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
307 v0RI->AddNode(v0R0,nsecR,rot1);
311 ncellsR = (nsecR - 1) * 6; // 6 cells per sector (2 cells in ring 3 and 4)
312 AliInfo(Form("Number of cells on Right side - V0C = %d", ncellsR));
314 // Creation of assembly v0LE - left part - :
315 // Entrance face at +339.0 cm (new coordinate system) ...
317 Float_t heightLeft = fV0AHeight1 + fV0AHeight2 + fV0AHeight3 + fV0AHeight4;
318 Float_t r4Left = fV0ARMin + heightLeft;
320 TGeoVolume *v0LE = new TGeoVolumeAssembly("V0LE");
322 TGeoTranslation *tr8 = new TGeoTranslation(0.,0.,339.0 + fV0ACellThickness/2.0);
323 top->AddNode(v0LE,1,tr8);
325 // Creation of assembly V0L0 of scintillator cells within one sector
327 TGeoVolume *v0L0 = new TGeoVolumeAssembly("V0L0");
330 offsetLeft = - fV0ACellThickness/2.0;
332 Float_t r1Left = fV0ARMin + fV0AHeight1;
334 partubs[0] = fV0ARMin;
336 partubs[2] = fV0ACellThickness/2.0;
337 partubs[3] = 90.0-22.5;
338 partubs[4] = 135.0-22.5;
340 TGeoTubeSeg *sV0L1 = new TGeoTubeSeg("V0L1", partubs[0], partubs[1], partubs[2],
341 partubs[3], partubs[4]);
342 TGeoVolume *v0L1 = new TGeoVolume("V0L1",sV0L1,medSci);
343 v0L0->AddNode(v0L1,1,gGeoIdentity);
344 v0L1->SetLineColor(kColorVZERO);
345 v0L1->SetVisibility(kTRUE);
347 Float_t r2Left = r1Left + fV0AHeight2;
352 TGeoTubeSeg *sV0L2 = new TGeoTubeSeg("V0L2", partubs[0], partubs[1], partubs[2],
353 partubs[3], partubs[4]);
354 TGeoVolume *v0L2 = new TGeoVolume("V0L2",sV0L2,medSci);
355 v0L0->AddNode(v0L2,1,gGeoIdentity);
356 v0L2->SetLineColor(kColorVZERO);
357 v0L2->SetVisibility(kTRUE);
359 Float_t r3Left = r2Left + fV0AHeight3;
364 TGeoTubeSeg *sV0L3 = new TGeoTubeSeg("V0L3", partubs[0], partubs[1], partubs[2],
365 partubs[3], partubs[4]);
366 TGeoVolume *v0L3 = new TGeoVolume("V0L3",sV0L3,medSci);
367 v0L0->AddNode(v0L3,1,gGeoIdentity);
368 v0L3->SetLineColor(kColorVZERO);
369 v0L3->SetVisibility(kTRUE);
374 TGeoTubeSeg *sV0L4 = new TGeoTubeSeg("V0L4", partubs[0], partubs[1], partubs[2],
375 partubs[3], partubs[4]);
376 TGeoVolume *v0L4 = new TGeoVolume("V0L4",sV0L4,medSci);
377 v0L0->AddNode(v0L4,1,gGeoIdentity);
378 v0L4->SetLineColor(kColorVZERO);
379 v0L4->SetVisibility(kTRUE);
381 Int_t nsecL = 1; // number of sectors in left part of V0
382 Int_t ncellsL; // number of scintillating cells
384 for (phi = 22.5; phi < 360.0; phi = phi + phiDeg)
387 TGeoRotation *rot1 = new TGeoRotation("rot1", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
388 v0LE->AddNode(v0L0,nsecL,rot1);
392 ncellsL = (nsecL - 1) * 4; // 4 cells per sector
393 AliInfo(Form("Number of cells on Left side - V0A = %d\n", ncellsL));
395 gGeoManager->SetTopVolume(top);
396 gGeoManager->CloseGeometry();
397 // gGeoManager-> SetVisLevel(4);
400 //_____________________________________________________________________________
401 void AliVZEROv6::CreateMaterials()
404 // Creates materials used for geometry
406 AliDebug(2,"Create materials");
408 // Int_t *idtmed = fIdtmed->GetArray()-2999;
410 Int_t fieldType = gAlice->Field()->Integ(); // Field type
411 Double_t maxField = gAlice->Field()->Max(); // Field max.
412 Double_t maxBending = 0; // Max Angle
413 Double_t maxStepSize = 0.001; // Max step size
414 Double_t maxEnergyLoss = 1; // Max Delta E
415 Double_t precision = 0.001; // Precision
416 Double_t minStepSize = 0.001; // Minimum step size
418 Double_t a, z, density, radLength, absLength;
419 Float_t tmaxfd, stemax, deemax, epsil, stmin;
431 // Parameters for Air (= 0.01% C + 75% N + 23% O + 1% Ar )
433 Float_t aa[] = { 12.0107, 14.0067, 15.9994, 39.948 };
434 Float_t za[] = { 6., 7., 8., 18. };
435 Float_t wa[] = { 0.000124, 0.755267, 0.231781, 0.012827 };
436 density = 0.00120479;
442 AliMixture(id, "Air", aa, za, density, 4, wa);
443 AliMedium(id, "Air", id, 1, fieldType, maxField, maxBending,
444 maxStepSize, maxEnergyLoss, precision, minStepSize);
446 // Parameters for Aluminum
457 AliMaterial( id, "Aluminum", a, z, density, radLength, 37.2, 0, 0);
458 AliMedium(id, "Aluminum", id, 1, fieldType, maxField, maxBending,
459 maxStepSize, maxEnergyLoss, precision, minStepSize);
461 // Parameters for Carbon
468 AliMaterial(id, "Carbon", a, z, density, radLength, 49.9, 0, 0);
469 AliMedium(id, "Carbon", id, 1, fieldType, maxField, maxBending,
470 maxStepSize, maxEnergyLoss, precision, minStepSize);
472 // Parameters for scintillator
474 Float_t as[] = { 1.00794, 12.011};
475 Float_t zs[] = { 1., 6.};
476 Float_t ws[] = { 1., 1.};
483 AliMixture(id, "Scintillator", as, zs, density, -2, ws);
484 AliMedium(id, "Scintillator", id, 1, fieldType, maxField, maxBending,
485 maxStepSize,maxEnergyLoss,precision,minStepSize);
490 //_____________________________________________________________________________
491 void AliVZEROv6::DrawModule() const
494 // Drawing is done in DrawVZERO.C
496 AliDebug(2,"DrawModule");
500 //_____________________________________________________________________________
501 void AliVZEROv6::DrawGeometry()
504 // Drawing of V0 geometry done in DrawV0.C
506 AliDebug(2,"DrawGeometry");
508 // Here is DrawV0.C :
512 // TGeoVolume *top = gGeoManager->GetMasterVolume();
513 // gGeoManager->SetNsegments(80);
514 // Int_t nd = top->GetNdaughters();
515 // for (Int_t i=0; i<nd; i++) top->GetNode(i)->GetVolume()->InvisibleAll();
516 // TGeoVolume *v0ri = gGeoManager->GetVolume("V0RI");
517 // TGeoVolume *v0le = gGeoManager->GetVolume("V0LE");
518 // v0ri->SetVisibility(kTRUE);
519 // v0ri->VisibleDaughters(kTRUE);
520 // v0le->SetVisibility(kTRUE);
521 // v0le->VisibleDaughters(kTRUE);
522 // top->SetVisibility(kTRUE);
528 //_____________________________________________________________________________
529 void AliVZEROv6::Init()
531 // Initialises version of the VZERO Detector given in Config
532 // Just prints an information message
534 AliInfo(Form("VZERO version %d initialized \n",IsVersion()));
539 //_____________________________________________________________________________
540 void AliVZEROv6::StepManager()
543 // Step Manager, called at each step
547 static Float_t hits[21];
548 static Float_t eloss, tlength;
549 static Int_t nPhotonsInStep;
550 static Int_t nPhotons;
551 static Int_t numStep;
553 Float_t destep, step;
557 // We keep only charged tracks :
559 if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
561 vol[0] = gMC->CurrentVolOffID(1, vol[1]);
562 vol[2] = gMC->CurrentVolID(copy);
565 static Int_t idV0R1 = gMC->VolId("V0R1");
566 static Int_t idV0L1 = gMC->VolId("V0L1");
567 static Int_t idV0R2 = gMC->VolId("V0R2");
568 static Int_t idV0L2 = gMC->VolId("V0L2");
569 static Int_t idV0R3 = gMC->VolId("V0R3");
570 static Int_t idV0L3 = gMC->VolId("V0L3");
571 static Int_t idV0R4 = gMC->VolId("V0R4");
572 static Int_t idV0L4 = gMC->VolId("V0L4");
573 static Int_t idV0R5 = gMC->VolId("V0R5");
574 static Int_t idV0R6 = gMC->VolId("V0R6");
576 if ( gMC->CurrentVolID(copy) == idV0R1 ||
577 gMC->CurrentVolID(copy) == idV0L1 )
579 else if ( gMC->CurrentVolID(copy) == idV0R2 ||
580 gMC->CurrentVolID(copy) == idV0L2 )
582 else if ( gMC->CurrentVolID(copy) == idV0R3 ||
583 gMC->CurrentVolID(copy) == idV0R4 ||
584 gMC->CurrentVolID(copy) == idV0L3 )
586 else if ( gMC->CurrentVolID(copy) == idV0R5 ||
587 gMC->CurrentVolID(copy) == idV0R6 ||
588 gMC->CurrentVolID(copy) == idV0L4 )
594 if ( ringNumber > 0.5 ) {
596 destep = gMC->Edep();
597 step = gMC->TrackStep();
599 nPhotonsInStep = Int_t(destep / (fLightYield *1e-9) );
600 nPhotonsInStep = gRandom->Poisson(nPhotonsInStep);
605 if ( gMC->IsTrackEntering() ) {
607 nPhotons = nPhotonsInStep;
608 gMC->TrackPosition(fTrackPosition);
609 gMC->TrackMomentum(fTrackMomentum);
611 Float_t pt = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
612 fTrackMomentum.Py() * fTrackMomentum.Py() );
614 hits[0] = fTrackPosition.X();
615 hits[1] = fTrackPosition.Y();
616 hits[2] = fTrackPosition.Z();
617 hits[3] = Float_t (gMC->TrackPid());
619 hits[4] = gMC->TrackTime();
620 hits[5] = gMC->TrackCharge();
621 hits[6] = fTrackMomentum.Theta()*TMath::RadToDeg();
622 hits[7] = fTrackMomentum.Phi()*TMath::RadToDeg();
623 hits[8] = ringNumber;
626 hits[10] = fTrackMomentum.P();
627 hits[11] = fTrackMomentum.Px();
628 hits[12] = fTrackMomentum.Py();
629 hits[13] = fTrackMomentum.Pz();
631 TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
632 hits[14] = par->Vx();
633 hits[15] = par->Vy();
634 hits[16] = par->Vz();
640 nPhotons = nPhotons + nPhotonsInStep;
642 if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
644 nPhotons = nPhotons - Int_t((Float_t(nPhotons) * fLightAttenuation * fnMeters));
645 nPhotons = nPhotons - Int_t( Float_t(nPhotons) * fFibToPhot);
650 hits[20] = GetCellId (vol, hits);
652 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
665 //_____________________________________________________________________________
666 void AliVZEROv6::AddHit(Int_t track, Int_t *vol, Float_t *hits)
671 TClonesArray &lhits = *fHits;
672 new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
675 //_____________________________________________________________________________
676 void AliVZEROv6::AddDigits(Int_t *tracks, Int_t* digits)
679 // Adds a VZERO digit
681 TClonesArray &ldigits = *fDigits;
682 new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
685 //_____________________________________________________________________________
686 void AliVZEROv6::MakeBranch(Option_t *option)
689 // Creates new branches in the current Root Tree
692 sprintf(branchname,"%s",GetName());
693 AliDebug(2,Form("fBufferSize = %d",fBufferSize));
695 const char *cH = strstr(option,"H");
697 if (fHits && TreeH() && cH) {
698 TreeH()->Branch(branchname,&fHits, fBufferSize);
699 AliDebug(2,Form("Making Branch %s for hits",branchname));
702 const char *cD = strstr(option,"D");
704 if (fDigits && fLoader->TreeD() && cD) {
705 fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
706 AliDebug(2,Form("Making Branch %s for digits",branchname));
711 //_____________________________________________________________________________
712 Int_t AliVZEROv6::GetCellId(Int_t *vol, Float_t *hits)
715 // Returns Id of scintillator cell
716 // Right side from 0 to 47
717 // Left side from 48 to 95
719 // hits[8] = ring number (1 to 4)
720 // vol[1] = copy number (1 to 8)
722 Int_t index = vol[1];
723 Int_t ringNumber = Int_t(hits[8]);
726 // cout << "volID = " << vol[0] << " copy = " << vol[1] << endl;
727 // cout << "X = " << hits[0] << " Y = " << hits[1] << endl;
729 Float_t phi = Float_t(TMath::ATan2(Double_t(hits[1]),Double_t(hits[0])) );
732 if (index < 7) index = index + 8;
736 index = (index - 7) + ( ( ringNumber - 1 ) * 8);}
737 else if(ringNumber >= 3){
738 if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R3")||
739 gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R5") )
740 {index = (index*2 - 14) + ( ( ringNumber - 2 ) * 16); }
741 if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R4")||
742 gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R6") )
743 {index = (index*2 - 13) + ( ( ringNumber - 2 ) * 16); }
748 else if (hits[2] > 0.0){
749 index = (index - 7 + 48) + ( ( ringNumber - 1 ) * 8);
752 // cout << " ring = " << ringNumber << " phi = "<< phi << endl;
753 // cout << " cellID = " << fCellId << endl;
754 // cout << "**********" << endl;