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c985a636 1/**************************************************************************
2 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3 * *
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 *
12 * about the suitability of this software for any purpose. It is *
13 * provided "as is" without express or implied warranty. *
14 **************************************************************************/
15
16/* $Id$ */
17
18//////////////////////////////////////////////////////////////////////
19// //
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 //
27// //
28//////////////////////////////////////////////////////////////////////
29
f7a1cc68 30#include <TGeoGlobalMagField.h>
31
c985a636 32#include "AliVZEROv6.h"
c985a636 33
34ClassImp(AliVZEROv6)
35
36//_____________________________________________________________________________
0b2bea8b 37AliVZEROv6:: AliVZEROv6():AliVZERO(),
38 fCellId(0),
39 fTrackPosition(),
40 fTrackMomentum(),
41 fV0CHeight1(2.5),
42 fV0CHeight2(4.4),
43 fV0CHeight3(7.4),
44 fV0CHeight4(12.5),
45 fV0CRMin(4.6),
46 fV0CRBox(38.0),
47 fV0CLidThickness(0.30),
48 fV0CCellThickness(2.00),
49 fV0CBoxThickness(4.70),
50 fV0COffsetFibers(1.0),
51 fV0AHeight1(3.3),
52 fV0AHeight2(6.2),
53 fV0AHeight3(8.9),
54 fV0AHeight4(20.9),
55 fV0ARMin(4.30),
56 fV0ACellThickness(2.00),
57 fLightYield(93.75),
58 fLightAttenuation(0.05),
59 fnMeters(15.0),
60 fFibToPhot(0.3),
61 fVersion(6)
c985a636 62{
63// Standard default constructor
64}
65
66//_____________________________________________________________________________
67AliVZEROv6::AliVZEROv6(const char *name, const char *title):
0b2bea8b 68 AliVZERO(name,title),
69 fCellId(0),
70 fTrackPosition(),
71 fTrackMomentum(),
72 fV0CHeight1(2.5),
73 fV0CHeight2(4.4),
74 fV0CHeight3(7.4),
75 fV0CHeight4(12.5),
76 fV0CRMin(4.6),
77 fV0CRBox(38.0),
78 fV0CLidThickness(0.30),
79 fV0CCellThickness(2.00),
80 fV0CBoxThickness(4.70),
81 fV0COffsetFibers(1.0),
82 fV0AHeight1(3.3),
83 fV0AHeight2(6.2),
84 fV0AHeight3(8.9),
85 fV0AHeight4(20.9),
86 fV0ARMin(4.30),
87 fV0ACellThickness(2.00),
88 fLightYield(93.75),
89 fLightAttenuation(0.05),
90 fnMeters(15.0),
91 fFibToPhot(0.3),
92 fVersion(6)
c985a636 93{
94
95// Standard constructor for V-zero Detector version 6
96
97 AliDebug(2,"Create VZERO object ");
98
99 fVersion = 6; // version number
100
101// Parameters related to geometry :
102// V0 part in front of muon arm absorber
103
0b2bea8b 104// fV0CHeight1 = 2.5; // height of cell 1, in cm
105// fV0CHeight2 = 4.4; // height of cell 2, in cm
106// fV0CHeight3 = 7.4; // height of cell 3, in cm
107// fV0CHeight4 = 12.5; // height of cell 4, in cm
108// fV0CRMin = 4.6;
109// fV0CRBox = 38.0; // outer radius of box, in cm
110// fV0CLidThickness = 0.30; // thickness of Carbon lid
111// fV0CCellThickness = 2.00; // thickness of elementary cell
112// fV0CBoxThickness = 4.70; // thickness of V0C Box
113// fV0COffsetFibers = 1.0; // offset to output fibers, in cm
c985a636 114
115// V0 part on the other side with respect to Interaction Point
116
0b2bea8b 117// fV0AHeight1 = 3.3; // height of cell 1, in cm
118// fV0AHeight2 = 6.2; // height of cell 2, in cm
119// fV0AHeight3 = 8.9; // height of cell 3, in cm
120// fV0AHeight4 = 20.9; // height of cell 4, in cm
121// fV0ARMin = 4.30;
122// fV0ACellThickness = 2.00; // thickness of elementary cell
123//
c985a636 124// Parameters related to light output :
125
0b2bea8b 126// fLightYield = 93.75; // Light yield in BC408 (93.75 eV per photon)
127// fLightAttenuation = 0.05; // Light attenuation in fiber (0.05 per meter)
128// fnMeters = 15.0; // Number of meters of clear fibers to PM
129// fFibToPhot = 0.3; // Attenuation at fiber-photocathode interface
c985a636 130}
131
c985a636 132//_____________________________________________________________________________
133void AliVZEROv6::CreateGeometry()
134{
135
136// Constructs TGeo geometry
137
138 const int kColorVZERO = kGreen;
139
140 AliDebug(2,"VZERO ConstructGeometry");
141
54aa7396 142// TGeoMedium *medAir = gGeoManager->GetMedium("VZERO_Air");
c985a636 143 TGeoMedium *medAlu = gGeoManager->GetMedium("VZERO_Aluminum");
144 TGeoMedium *medCar = gGeoManager->GetMedium("VZERO_Carbon");
145 TGeoMedium *medSci = gGeoManager->GetMedium("VZERO_Scintillator");
146
147 TGeoVolume *top = gGeoManager->GetVolume("ALIC");
148
c985a636 149 Float_t heightRight, r4Right;
150
151 Float_t zdet = 90.0 - 0.5 - fV0CBoxThickness/2.0;
152 heightRight = fV0CHeight1 + fV0CHeight2 + fV0CHeight3 + fV0CHeight4;
153 r4Right = fV0CRMin + heightRight + 3.0*0.2; // 3 spacings of 2mm between rings
c985a636 154
54aa7396 155// Creation of assembly V0RI - right part - :
c985a636 156
54aa7396 157 TGeoVolume *v0RI = new TGeoVolumeAssembly("V0RI");
c985a636 158 TGeoTranslation *tr1 = new TGeoTranslation(0.,0.,-zdet);
159 top->AddNode(v0RI,1,tr1);
c985a636 160
161// Creation of carbon lids (3.0 mm thick) to keep V0C box shut :
54aa7396 162
163 Float_t partube[3];
c985a636 164
165 partube[0] = fV0CRMin;
166 partube[1] = fV0CRBox;
167 partube[2] = fV0CLidThickness/2.0;
168
169 TGeoTube *sV0CA = new TGeoTube("V0CA", partube[0], partube[1], partube[2]);
170 TGeoVolume *v0CA = new TGeoVolume("V0CA",sV0CA,medCar);
171 TGeoTranslation *tr2 = new TGeoTranslation(0.,0., fV0CBoxThickness/2.0-partube[2]);
172 TGeoTranslation *tr3 = new TGeoTranslation(0.,0.,-fV0CBoxThickness/2.0+partube[2]);
173 v0RI->AddNode(v0CA,1,tr2);
174 v0RI->AddNode(v0CA,2,tr3);
175 v0CA->SetLineColor(kYellow);
176
177// Creation of aluminum rings 3.0 mm thick to maintain the v0RI pieces :
178
179 partube[0] = fV0CRMin - 0.3;
180 partube[1] = fV0CRMin;
181 partube[2] = fV0CBoxThickness/2.0;
182
183 TGeoTube *sV0IR = new TGeoTube("V0IR", partube[0], partube[1], partube[2]);
184 TGeoVolume *v0IR = new TGeoVolume("V0IR",sV0IR,medAlu);
185 v0RI->AddNode(v0IR,1,0);
186 v0IR->SetLineColor(kYellow);
187
188 partube[0] = fV0CRBox;
189 partube[1] = fV0CRBox + 0.3;
190 partube[2] = fV0CBoxThickness/2.0;
191
192 TGeoTube *sV0ER = new TGeoTube("V0ER", partube[0], partube[1], partube[2]);
193 TGeoVolume *v0ER = new TGeoVolume("V0ER",sV0ER,medAlu);
194 v0RI->AddNode(v0ER,1,0);
195 v0ER->SetLineColor(kYellow);
196
54aa7396 197// Creation of assembly V0R0 of scintillator cells within one sector
c985a636 198
54aa7396 199 TGeoVolume *v0R0 = new TGeoVolumeAssembly("V0R0");
c985a636 200
201// Elementary cell of ring 1 - right part - :
202// (cells of ring 1 will be shifted by 2.0 cm backwards to output fibers)
203
204 Float_t r1Right = fV0CRMin + fV0CHeight1;
54aa7396 205 Float_t offset = fV0CBoxThickness/2.0 - fV0CLidThickness - fV0CCellThickness/2.0;
206
207 Float_t partubs[5];
208
c985a636 209 partubs[0] = fV0CRMin;
210 partubs[1] = r1Right;
211 partubs[2] = fV0CCellThickness/2.0;
54aa7396 212 partubs[3] = 90.0-22.5;
213 partubs[4] = 135.0-22.5;
214
c985a636 215 TGeoTubeSeg *sV0R1 = new TGeoTubeSeg("V0R1", partubs[0], partubs[1], partubs[2],
216 partubs[3], partubs[4]);
217 TGeoVolume *v0R1 = new TGeoVolume("V0R1",sV0R1,medSci);
218 TGeoTranslation *tr4 = new TGeoTranslation(0.,0.,-offset);
219 v0R0->AddNode(v0R1,1,tr4);
220 v0R1->SetLineColor(kColorVZERO);
221
222// Elementary cell of ring 2 - right part - :
223// (cells of ring 2 will be shifted by 1.0 cm backwards to output fibers)
224
225 Float_t r2Right = r1Right + fV0CHeight2;
226
227 partubs[0] = r1Right; // must be equal to 7.1
228 partubs[1] = r2Right; // must be equal to 11.5
229 TGeoTubeSeg *sV0R2 = new TGeoTubeSeg("V0R2", partubs[0], partubs[1], partubs[2],
230 partubs[3], partubs[4]);
231 TGeoVolume *v0R2 = new TGeoVolume("V0R2",sV0R2,medSci);
232 TGeoTranslation *tr5 = new TGeoTranslation(0.0,0.2,-offset + fV0COffsetFibers);
233 v0R0->AddNode(v0R2,1,tr5);
234 v0R2->SetLineColor(kColorVZERO);
235
236// Ring 3 - right part - :
237
238// Float_t x = TMath::ATan(1.0/156.0) * ((180./TMath::Pi()));
239
240 r2Right = r2Right + 0.2;
241 Float_t r3Right = r2Right + fV0CHeight3;
54aa7396 242// printf(" r2 = %f, r3 = %f \n\n", r2Right,r3Right);
c985a636 243
244 partubs[0] = r2Right; // must be equal to 11.7
245 partubs[1] = r3Right; // must be equal to 19.1
246 partubs[3] = 90.0-22.5;
247 partubs[4] = 112.5-22.5;
248
249 TGeoTubeSeg *sV0R3 = new TGeoTubeSeg("V0R3", partubs[0], partubs[1], partubs[2],
250 partubs[3], partubs[4]);
251 TGeoVolume *v0R3 = new TGeoVolume("V0R3",sV0R3,medSci);
252 TGeoTranslation *tr6 = new TGeoTranslation(0.,0.2,-offset + 2.0*fV0COffsetFibers);
253 v0R0->AddNode(v0R3,1,tr6);
254 v0R3->SetLineColor(kColorVZERO);
255
256 partubs[3] = 112.5-22.5;
257 partubs[4] = 135.0-22.5;
258
259 TGeoTubeSeg *sV0R4 = new TGeoTubeSeg("V0R4", partubs[0], partubs[1], partubs[2],
260 partubs[3], partubs[4]);
261 TGeoVolume *v0R4 = new TGeoVolume("V0R4",sV0R4,medSci);
262 v0R0->AddNode(v0R4,1,tr6);
263 v0R4->SetLineColor(kColorVZERO);
264
265// Ring 4 - right part - :
266
267 Float_t x = TMath::ATan(3.5/257.5) * ((180./TMath::Pi()));
268 r3Right = r3Right + 0.2 + 0.2; // + 0.2 because no shift in translation here !!
269
270 partubs[0] = r3Right; // must be equal to 19.5
271 partubs[1] = r4Right; // must be equal to 32.0
272 partubs[3] = 90.0-22.5+x;
273 partubs[4] = 112.5-22.5-x;
274
275 TGeoTubeSeg *sV0R5 = new TGeoTubeSeg("V0R5", partubs[0], partubs[1], partubs[2],
276 partubs[3], partubs[4]);
277 TGeoVolume *v0R5 = new TGeoVolume("V0R5",sV0R5,medSci);
278 TGeoTranslation *tr7 = new TGeoTranslation(0.,0.0,-offset + 2.0*fV0COffsetFibers);
279 v0R0->AddNode(v0R5,1,tr7);
280 v0R5->SetLineColor(kColorVZERO);
281
282 partubs[3] = 112.5-22.5+x;
283 partubs[4] = 135.0-22.5-x;
284
285 TGeoTubeSeg *sV0R6 = new TGeoTubeSeg("V0R6", partubs[0], partubs[1], partubs[2],
286 partubs[3], partubs[4]);
287 TGeoVolume *v0R6 = new TGeoVolume("V0R6",sV0R6,medSci);
288 v0R0->AddNode(v0R6,1,tr7);
289 v0R6->SetLineColor(kColorVZERO);
290
291 Float_t phi;
292 Float_t phiDeg= 180./4.;
293
294 Int_t nsecR = 1; // number of sectors in right part of V0
295 Int_t ncellsR; // number of scintillating cells
296
297 for (phi = 22.5; phi < 360.0; phi = phi + phiDeg)
298
299 {
300 TGeoRotation *rot1 = new TGeoRotation("rot1", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
301
302 v0RI->AddNode(v0R0,nsecR,rot1);
303 nsecR++;
304 }
305
306 ncellsR = (nsecR - 1) * 6; // 6 cells per sector (2 cells in ring 3 and 4)
307 AliInfo(Form("Number of cells on Right side - V0C = %d", ncellsR));
308
54aa7396 309// Creation of assembly v0LE - left part - :
c985a636 310// Entrance face at +339.0 cm (new coordinate system) ...
311
312 Float_t heightLeft = fV0AHeight1 + fV0AHeight2 + fV0AHeight3 + fV0AHeight4;
313 Float_t r4Left = fV0ARMin + heightLeft;
54aa7396 314
315 TGeoVolume *v0LE = new TGeoVolumeAssembly("V0LE");
316
c985a636 317 TGeoTranslation *tr8 = new TGeoTranslation(0.,0.,339.0 + fV0ACellThickness/2.0);
318 top->AddNode(v0LE,1,tr8);
54aa7396 319
320// Creation of assembly V0L0 of scintillator cells within one sector
321
322 TGeoVolume *v0L0 = new TGeoVolumeAssembly("V0L0");
c985a636 323
324 Float_t offsetLeft;
325 offsetLeft = - fV0ACellThickness/2.0;
326
327 Float_t r1Left = fV0ARMin + fV0AHeight1;
328
329 partubs[0] = fV0ARMin;
330 partubs[1] = r1Left;
54aa7396 331 partubs[2] = fV0ACellThickness/2.0;
332 partubs[3] = 90.0-22.5;
333 partubs[4] = 135.0-22.5;
334
c985a636 335 TGeoTubeSeg *sV0L1 = new TGeoTubeSeg("V0L1", partubs[0], partubs[1], partubs[2],
336 partubs[3], partubs[4]);
337 TGeoVolume *v0L1 = new TGeoVolume("V0L1",sV0L1,medSci);
338 v0L0->AddNode(v0L1,1,gGeoIdentity);
339 v0L1->SetLineColor(kColorVZERO);
340 v0L1->SetVisibility(kTRUE);
341
342 Float_t r2Left = r1Left + fV0AHeight2;
343
344 partubs[0] = r1Left;
345 partubs[1] = r2Left;
346
347 TGeoTubeSeg *sV0L2 = new TGeoTubeSeg("V0L2", partubs[0], partubs[1], partubs[2],
348 partubs[3], partubs[4]);
349 TGeoVolume *v0L2 = new TGeoVolume("V0L2",sV0L2,medSci);
350 v0L0->AddNode(v0L2,1,gGeoIdentity);
351 v0L2->SetLineColor(kColorVZERO);
352 v0L2->SetVisibility(kTRUE);
353
354 Float_t r3Left = r2Left + fV0AHeight3;
355
356 partubs[0] = r2Left;
357 partubs[1] = r3Left;
358
359 TGeoTubeSeg *sV0L3 = new TGeoTubeSeg("V0L3", partubs[0], partubs[1], partubs[2],
360 partubs[3], partubs[4]);
361 TGeoVolume *v0L3 = new TGeoVolume("V0L3",sV0L3,medSci);
362 v0L0->AddNode(v0L3,1,gGeoIdentity);
363 v0L3->SetLineColor(kColorVZERO);
364 v0L3->SetVisibility(kTRUE);
365
366 partubs[0] = r3Left;
367 partubs[1] = r4Left;
368
369 TGeoTubeSeg *sV0L4 = new TGeoTubeSeg("V0L4", partubs[0], partubs[1], partubs[2],
370 partubs[3], partubs[4]);
371 TGeoVolume *v0L4 = new TGeoVolume("V0L4",sV0L4,medSci);
372 v0L0->AddNode(v0L4,1,gGeoIdentity);
373 v0L4->SetLineColor(kColorVZERO);
374 v0L4->SetVisibility(kTRUE);
375
376 Int_t nsecL = 1; // number of sectors in left part of V0
377 Int_t ncellsL; // number of scintillating cells
378
379 for (phi = 22.5; phi < 360.0; phi = phi + phiDeg)
380
381 {
382 TGeoRotation *rot1 = new TGeoRotation("rot1", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );
383 v0LE->AddNode(v0L0,nsecL,rot1);
384 nsecL++;
385 }
386
387 ncellsL = (nsecL - 1) * 4; // 4 cells per sector
388 AliInfo(Form("Number of cells on Left side - V0A = %d\n", ncellsL));
16056ba5 389
390 gGeoManager->SetTopVolume(top);
c985a636 391 gGeoManager->CloseGeometry();
392// gGeoManager-> SetVisLevel(4);
c985a636 393}
394
395//_____________________________________________________________________________
396void AliVZEROv6::CreateMaterials()
397{
398
399// Creates materials used for geometry
400
401 AliDebug(2,"Create materials");
402
403// Int_t *idtmed = fIdtmed->GetArray()-2999;
404
f7a1cc68 405 Int_t fieldType = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Integ(); // Field type
406 Double_t maxField = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Max(); // Field max.
c985a636 407 Double_t maxBending = 0; // Max Angle
408 Double_t maxStepSize = 0.001; // Max step size
409 Double_t maxEnergyLoss = 1; // Max Delta E
410 Double_t precision = 0.001; // Precision
411 Double_t minStepSize = 0.001; // Minimum step size
412 Int_t id;
413 Double_t a, z, density, radLength, absLength;
414 Float_t tmaxfd, stemax, deemax, epsil, stmin;
415
416 a = 0.0; z = 0.0;
54aa7396 417 density = 0.0;
418 radLength = 0.0;
419 absLength = 999.0;
420 tmaxfd = 10.;
421 stemax = 0.1;
422 deemax = 0.1;
423 epsil = 0.001;
424 stmin = 0.001;
c985a636 425
426// Parameters for Air (= 0.01% C + 75% N + 23% O + 1% Ar )
427
428 Float_t aa[] = { 12.0107, 14.0067, 15.9994, 39.948 };
429 Float_t za[] = { 6., 7., 8., 18. };
430 Float_t wa[] = { 0.000124, 0.755267, 0.231781, 0.012827 };
431 density = 0.00120479;
432 maxBending = 1;
433 maxStepSize = .001;
434 precision = .001;
435 minStepSize = .001;
436 id = 1;
437 AliMixture(id, "Air", aa, za, density, 4, wa);
438 AliMedium(id, "Air", id, 1, fieldType, maxField, maxBending,
439 maxStepSize, maxEnergyLoss, precision, minStepSize);
440
441// Parameters for Aluminum
442
443 a = 26.98;
444 z = 13.00;
445 density = 2.7;
446 radLength = 8.9;
447 maxBending = 10;
448 maxStepSize = .01;
449 precision = .003;
450 minStepSize = .003;
451 id = 2;
452 AliMaterial( id, "Aluminum", a, z, density, radLength, 37.2, 0, 0);
453 AliMedium(id, "Aluminum", id, 1, fieldType, maxField, maxBending,
454 maxStepSize, maxEnergyLoss, precision, minStepSize);
455
456// Parameters for Carbon
457
458 a = 12.01;
459 z = 6.00;
460 density = 2.265;
461 radLength = 18.8;
462 id = 3;
463 AliMaterial(id, "Carbon", a, z, density, radLength, 49.9, 0, 0);
464 AliMedium(id, "Carbon", id, 1, fieldType, maxField, maxBending,
465 maxStepSize, maxEnergyLoss, precision, minStepSize);
466
467// Parameters for scintillator
468
469 Float_t as[] = { 1.00794, 12.011};
470 Float_t zs[] = { 1., 6.};
471 Float_t ws[] = { 1., 1.};
472 density = 1.032;
473 maxBending = 10;
474 maxStepSize = .01;
475 precision = .003;
476 minStepSize = .003;
477 id = 4;
478 AliMixture(id, "Scintillator", as, zs, density, -2, ws);
479 AliMedium(id, "Scintillator", id, 1, fieldType, maxField, maxBending,
480 maxStepSize,maxEnergyLoss,precision,minStepSize);
481
482
483}
484
485//_____________________________________________________________________________
486void AliVZEROv6::DrawModule() const
487{
488
489// Drawing is done in DrawVZERO.C
490
491 AliDebug(2,"DrawModule");
492}
493
494
495//_____________________________________________________________________________
496void AliVZEROv6::DrawGeometry()
497{
498
499// Drawing of V0 geometry done in DrawV0.C
500
501 AliDebug(2,"DrawGeometry");
502
503// Here is DrawV0.C :
504
505// void DrawV0()
506// {
507// TGeoVolume *top = gGeoManager->GetMasterVolume();
508// gGeoManager->SetNsegments(80);
509// Int_t nd = top->GetNdaughters();
510// for (Int_t i=0; i<nd; i++) top->GetNode(i)->GetVolume()->InvisibleAll();
511// TGeoVolume *v0ri = gGeoManager->GetVolume("V0RI");
512// TGeoVolume *v0le = gGeoManager->GetVolume("V0LE");
513// v0ri->SetVisibility(kTRUE);
514// v0ri->VisibleDaughters(kTRUE);
515// v0le->SetVisibility(kTRUE);
516// v0le->VisibleDaughters(kTRUE);
517// top->SetVisibility(kTRUE);
518// top->Draw();
519// }
520
521}
522
523//_____________________________________________________________________________
524void AliVZEROv6::Init()
525{
526// Initialises version of the VZERO Detector given in Config
527// Just prints an information message
528
529 AliInfo(Form("VZERO version %d initialized \n",IsVersion()));
530
531 AliVZERO::Init();
532}
533
534//_____________________________________________________________________________
535void AliVZEROv6::StepManager()
536{
537
538// Step Manager, called at each step
539
540 Int_t copy;
541 static Int_t vol[4];
542 static Float_t hits[21];
543 static Float_t eloss, tlength;
544 static Int_t nPhotonsInStep;
545 static Int_t nPhotons;
546 static Int_t numStep;
547 Float_t ringNumber;
548 Float_t destep, step;
549
550 numStep += 1;
551
552// We keep only charged tracks :
553
554 if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return;
555
556 vol[0] = gMC->CurrentVolOffID(1, vol[1]);
557 vol[2] = gMC->CurrentVolID(copy);
558 vol[3] = copy;
559
560 static Int_t idV0R1 = gMC->VolId("V0R1");
561 static Int_t idV0L1 = gMC->VolId("V0L1");
562 static Int_t idV0R2 = gMC->VolId("V0R2");
563 static Int_t idV0L2 = gMC->VolId("V0L2");
564 static Int_t idV0R3 = gMC->VolId("V0R3");
565 static Int_t idV0L3 = gMC->VolId("V0L3");
566 static Int_t idV0R4 = gMC->VolId("V0R4");
567 static Int_t idV0L4 = gMC->VolId("V0L4");
568 static Int_t idV0R5 = gMC->VolId("V0R5");
569 static Int_t idV0R6 = gMC->VolId("V0R6");
570
571 if ( gMC->CurrentVolID(copy) == idV0R1 ||
572 gMC->CurrentVolID(copy) == idV0L1 )
573 ringNumber = 1.0;
574 else if ( gMC->CurrentVolID(copy) == idV0R2 ||
575 gMC->CurrentVolID(copy) == idV0L2 )
576 ringNumber = 2.0;
577 else if ( gMC->CurrentVolID(copy) == idV0R3 ||
578 gMC->CurrentVolID(copy) == idV0R4 ||
579 gMC->CurrentVolID(copy) == idV0L3 )
580 ringNumber = 3.0;
581 else if ( gMC->CurrentVolID(copy) == idV0R5 ||
582 gMC->CurrentVolID(copy) == idV0R6 ||
583 gMC->CurrentVolID(copy) == idV0L4 )
584 ringNumber = 4.0;
585 else
586 ringNumber = 0.0;
587
588
589 if ( ringNumber > 0.5 ) {
590
591 destep = gMC->Edep();
592 step = gMC->TrackStep();
593
594 nPhotonsInStep = Int_t(destep / (fLightYield *1e-9) );
595 nPhotonsInStep = gRandom->Poisson(nPhotonsInStep);
596
597 eloss += destep;
598 tlength += step;
599
600 if ( gMC->IsTrackEntering() ) {
601
602 nPhotons = nPhotonsInStep;
603 gMC->TrackPosition(fTrackPosition);
604 gMC->TrackMomentum(fTrackMomentum);
605
606 Float_t pt = TMath::Sqrt( fTrackMomentum.Px() * fTrackMomentum.Px() +
607 fTrackMomentum.Py() * fTrackMomentum.Py() );
608
609 hits[0] = fTrackPosition.X();
610 hits[1] = fTrackPosition.Y();
611 hits[2] = fTrackPosition.Z();
612 hits[3] = Float_t (gMC->TrackPid());
613
614 hits[4] = gMC->TrackTime();
615 hits[5] = gMC->TrackCharge();
616 hits[6] = fTrackMomentum.Theta()*TMath::RadToDeg();
617 hits[7] = fTrackMomentum.Phi()*TMath::RadToDeg();
618 hits[8] = ringNumber;
619
620 hits[9] = pt;
621 hits[10] = fTrackMomentum.P();
622 hits[11] = fTrackMomentum.Px();
623 hits[12] = fTrackMomentum.Py();
624 hits[13] = fTrackMomentum.Pz();
625
626 TParticle *par = gAlice->GetMCApp()->Particle(gAlice->GetMCApp()->GetCurrentTrackNumber());
627 hits[14] = par->Vx();
628 hits[15] = par->Vy();
629 hits[16] = par->Vz();
630
631 tlength = 0.0;
632 eloss = 0.0;
633 }
634
635 nPhotons = nPhotons + nPhotonsInStep;
636
637 if( gMC->IsTrackExiting() || gMC->IsTrackStop() || gMC->IsTrackDisappeared()){
638
639 nPhotons = nPhotons - Int_t((Float_t(nPhotons) * fLightAttenuation * fnMeters));
640 nPhotons = nPhotons - Int_t( Float_t(nPhotons) * fFibToPhot);
641
642 hits[17] = eloss;
643 hits[18] = tlength;
644 hits[19] = nPhotons;
645 hits[20] = GetCellId (vol, hits);
54aa7396 646
c985a636 647 AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(), vol, hits);
648
649 tlength = 0.0;
650 eloss = 0.0;
651 nPhotons = 0;
652 nPhotonsInStep = 0;
653
654 numStep = 0;
655 }
656 }
657
658}
659
660//_____________________________________________________________________________
661void AliVZEROv6::AddHit(Int_t track, Int_t *vol, Float_t *hits)
662{
663
664// Adds a VZERO hit
665
666 TClonesArray &lhits = *fHits;
667 new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
668}
669
670//_____________________________________________________________________________
671void AliVZEROv6::AddDigits(Int_t *tracks, Int_t* digits)
672{
673
674// Adds a VZERO digit
675
676 TClonesArray &ldigits = *fDigits;
677 new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
678}
679
680//_____________________________________________________________________________
681void AliVZEROv6::MakeBranch(Option_t *option)
682{
683
684// Creates new branches in the current Root Tree
685
686 char branchname[10];
687 sprintf(branchname,"%s",GetName());
688 AliDebug(2,Form("fBufferSize = %d",fBufferSize));
689
690 const char *cH = strstr(option,"H");
691
cb5b8b21 692 if (fHits && fLoader->TreeH() && cH) {
693 fLoader->TreeH()->Branch(branchname,&fHits, fBufferSize);
c985a636 694 AliDebug(2,Form("Making Branch %s for hits",branchname));
695 }
696
697 const char *cD = strstr(option,"D");
698
699 if (fDigits && fLoader->TreeD() && cD) {
700 fLoader->TreeD()->Branch(branchname,&fDigits, fBufferSize);
701 AliDebug(2,Form("Making Branch %s for digits",branchname));
702 }
703
704}
705
706//_____________________________________________________________________________
707Int_t AliVZEROv6::GetCellId(Int_t *vol, Float_t *hits)
708{
709
710 // Returns Id of scintillator cell
711 // Right side from 0 to 47
712 // Left side from 48 to 95
713
714 // hits[8] = ring number (1 to 4)
715 // vol[1] = copy number (1 to 8)
716
717 Int_t index = vol[1];
83f1e436 718 Int_t ringNumber = Int_t(hits[8]);
c985a636 719 fCellId = 0;
720
721// cout << "volID = " << vol[0] << " copy = " << vol[1] << endl;
722// cout << "X = " << hits[0] << " Y = " << hits[1] << endl;
723
724 Float_t phi = Float_t(TMath::ATan2(Double_t(hits[1]),Double_t(hits[0])) );
c985a636 725 phi = kRaddeg * phi;
726
727 if (index < 7) index = index + 8;
728
729 if (hits[2] < 0.0) {
83f1e436 730 if(ringNumber < 3) {
731 index = (index - 7) + ( ( ringNumber - 1 ) * 8);}
732 else if(ringNumber >= 3){
c985a636 733 if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R3")||
734 gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R5") )
83f1e436 735 {index = (index*2 - 14) + ( ( ringNumber - 2 ) * 16); }
c985a636 736 if(gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R4")||
737 gMC->CurrentVolID(vol[1]) == gMC->VolId("V0R6") )
83f1e436 738 {index = (index*2 - 13) + ( ( ringNumber - 2 ) * 16); }
c985a636 739 }
740 fCellId = index;
741 }
742
743 else if (hits[2] > 0.0){
83f1e436 744 index = (index - 7 + 48) + ( ( ringNumber - 1 ) * 8);
c985a636 745 fCellId = index;}
746
83f1e436 747// cout << " ring = " << ringNumber << " phi = "<< phi << endl;
c985a636 748// cout << " cellID = " << fCellId << endl;
749// cout << "**********" << endl;
750
751 return fCellId;
752
753
754}