Use SetCerenkov to eliminate TGeant3 dependence.
[u/mrichter/AliRoot.git] / VZERO / AliVZEROv0.cxx
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3  *                                                                        *
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15
16
17 //////////////////////////////////////////////////////////////////////
18 //                                                                  //
19 //  (V-zero) detector  version 0  as designed by the Lyon group     //
20 //   All comments should be sent to Brigitte CHEYNIS :              //
21 //                                  b.cheynis@ipnl.in2p3.fr         // 
22 //   Geometrie      du 25/02/2002                                   //
23 //                                                                  //
24 //////////////////////////////////////////////////////////////////////
25
26 #include <TMath.h>
27 #include <TGeometry.h>
28 #include <TTRD2.h>
29 #include <TCONE.h>
30 #include <TPGON.h>
31 #include <TPCON.h>
32 #include <TSPHE.h>
33 #include <TTRAP.h>
34 #include <TBRIK.h>
35 #include <TBox.h>
36
37 #include <TShape.h>
38 #include <TNode.h>
39 #include <TClonesArray.h>
40 #include <TH1.h>
41 #include <string.h>
42 #include <iostream.h>
43
44 #include "AliVZEROv0.h"
45 #include "AliRun.h"
46 #include "AliMagF.h"
47 #include "AliMC.h"
48 #include "AliVZEROhit.h"
49 #include "AliVZEROdigit.h"
50 #include <iostream.h>
51 #include <fstream.h>
52
53 #include <stdlib.h>
54 #include "TObjectTable.h"
55
56 #include "AliConst.h"
57 #include "ABSOSHILConst.h"
58 #include "ABSOConst.h"
59 #include "TLorentzVector.h"
60
61 ClassImp(AliVZEROv0)
62
63 //--------------------------------------------------------------------
64 AliVZEROv0:: AliVZEROv0():AliVZERO()
65 {
66
67
68 }
69 //--------------------------------------------------------------------
70 AliVZEROv0::AliVZEROv0(const char *name, const char *title):
71  AliVZERO(name,title)
72 {
73
74 // Standard constructor for V-zeroR Detector (right part)  version 0
75
76
77   Int_t i;
78
79   printf("\n");
80   for(i=0;i<30;i++) printf("*");
81   printf(" Create VZERO object ");
82   for(i=0;i<30;i++) printf("*");
83   printf("\n");
84   
85 }
86
87 //-------------------------------------------------------------------------
88 void AliVZEROv0::CreateGeometry()
89 {
90
91 // Creates the Geant geometry of the V-zero Detector  version 0
92
93   
94   Int_t i;
95   
96   printf("\n");
97   for(i=0;i<30;i++) printf("*");
98   printf(" Create VZERO Geometry ");
99   for(i=0;i<30;i++) printf("*");
100   printf("\n");
101     
102   
103   Int_t    *idtmed = fIdtmed->GetArray()-2999;
104
105   Int_t    n_detec_R = 1;
106   Int_t    n_detec_L = 1;
107  
108   Int_t    n_cells_R = 1;
109   Int_t    n_cells_L = 1;
110   
111   Int_t    idrotm[999];
112  
113   Float_t  height1, height2, height3, height4, height5; 
114   Float_t  height;
115   Float_t  theta;  
116   Float_t  half_thick_alu;
117   Float_t  half_thick_qua1,half_thick_qua2,half_thick_qua3;
118   Float_t  half_thick_qua4,half_thick_qua5;
119   Float_t  zdet;
120   Float_t  r0, r5;
121   Float_t  pi = TMath::Pi();
122   Float_t  thick_alu;
123   
124   height1           =     2.0;           // height of cell 1, in cm
125   height2           =     3.2;           // height of cell 2, in cm
126   height3           =     4.9;           // height of cell 3, in cm
127   height4           =     7.5;           // height of cell 4, in cm
128   height5           =    12.0;           // height of cell 5, in cm
129   
130   theta             = pi/6.0/2.0;       // half angular opening = 15 degrees
131   half_thick_alu    = 0.0025;            // half thickness of aluminum foil, in cm
132   thick_alu         = 2.0 * half_thick_alu; 
133   fThickness1       = 2.5;
134   half_thick_qua1   = fThickness1/2.0;   // half thickness of WRAPPED quartz cell (inner ring)
135   half_thick_qua2   = half_thick_qua1  - 0.25;
136   half_thick_qua3   = half_thick_qua2  - 0.25;
137   half_thick_qua4   = half_thick_qua3  - 0.25;
138   half_thick_qua5   = half_thick_qua4  - 0.25;
139   
140   zdet              =    86.9 +fThickness/2.0;  // distance to vertex (along Z axis)
141   r0                =    4.0;            // closest distance to center of the beam pipe
142   height            =    height1 + height2 + height3 + height4 + height5;
143   r5                =    r0 + height;
144
145 //............................................................................
146
147 // Here I add the flange which is sitting on beam line 
148 // right in front of V0R detector, and which I found on CERN drawing 
149 // entitled : ALICE BEAM VACCUM CHAMBER - RB26 version III :  
150    
151 //     Float_t   pflange[3];
152 //     
153 //     pflange[0] = 3.0;
154 //     pflange[1] = 5.675;
155 //     pflange[2] = 0.9;        
156 // 
157 //     gMC->Gsvolu("QFA0","TUBE", idtmed[3003], pflange, 3);
158 //     gMC->Gspos("QFA0", 1 ,"alic", 0.0, 0.0, 85.0+0.9, 0, "ONLY");
159      
160 //............................................................................
161
162
163 // Creation of mother volume V0LE - left part - :
164 // Face entree a -350.0 cm ...
165
166    Float_t   partube[3];
167    
168    partube[0] =  4.3;
169    partube[1] = 45.0;
170    partube[2] = fThickness1/2.0;   
171     
172    gMC->Gsvolu("V0LE","TUBE",idtmed[3002],partube,3);
173   
174    
175 // Creation of five rings - left part - :
176 // Face entree a -350.0 cm ... 
177
178 // Mother volume V0L0 in which will be set 5 quartz cells 
179
180
181   Float_t   par[11];
182   
183   Float_t   dist0_left;   
184   Float_t   r0_left      =   4.3;   
185   Float_t   height1_left =   2.6; 
186   Float_t   height2_left =   4.1;
187   Float_t   height3_left =   6.4;
188   Float_t   height4_left =  10.2;
189   Float_t   height5_left =  16.9;
190   Float_t   height_left  = height1_left + height2_left + height3_left 
191                                         + height4_left + height5_left;
192   Float_t   r5_left      = r0_left  + height_left; 
193   
194    
195   dist0_left  =  r0_left + height_left / 2.0;
196   thick_alu   =  2.0*half_thick_alu;
197   
198   par[0]      =  half_thick_qua1;
199   par[1]      =  0.0;
200   par[2]      =  0.0;
201   par[3]      =  height_left / 2.0 ;
202   par[4]      =  TMath::Tan(theta) * r0_left;
203   par[5]      =  TMath::Tan(theta) * r5_left;
204   par[6]      =  0.0;
205   par[7]      =  height_left / 2.0 ;
206   par[8]      =  TMath::Tan(theta) * r0_left;
207   par[9]      =  TMath::Tan(theta) * r5_left;
208   par[10]     =  0.0;
209   
210
211   gMC->Gsvolu("V0L0","TRAP",idtmed[3010],par,11);  // air volume
212   
213   Float_t   dist1_left;
214   Float_t   r1_left;
215   Float_t   offset_left;
216      
217   dist1_left     =  (- height_left + height1_left) /2.0; 
218   r1_left        =  r0_left + height1_left;
219   offset_left    = - fThickness1/2.0 + 0.1; 
220    
221   par[0]    =  half_thick_qua1 - thick_alu;
222   par[3]    =  height1_left / 2.0 - thick_alu;
223   par[4]    =  TMath::Tan(theta) * r0_left - thick_alu;
224   par[5]    =  TMath::Tan(theta) * r1_left- thick_alu;
225   par[7]    =  height1_left / 2.0 - thick_alu;
226   par[8]    =  TMath::Tan(theta) * r0_left - thick_alu;
227   par[9]    =  TMath::Tan(theta) * r1_left - thick_alu;
228
229
230   gMC->Gsvolu("V0L1","TRAP",idtmed[3002],par,11);  // quartz volume
231   gMC->Gspos("V0L1",1,"V0L0", 0.0, dist1_left , 0.0, 0,"ONLY"); 
232   
233   Float_t   dist2_left;
234   Float_t   r2_left; 
235     
236   dist2_left     =    (- height_left + height2_left) /2.0 + height1_left;
237   r2_left        =       r1_left + height2_left; 
238   
239   par[0]    =  half_thick_qua1 - thick_alu;   
240   par[3]    =  height2_left / 2.0 - thick_alu;
241   par[4]    =  TMath::Tan(theta) * r1_left - thick_alu;
242   par[5]    =  TMath::Tan(theta) * r2_left - thick_alu;
243   par[7]    =  height2_left / 2.0 - thick_alu;
244   par[8]    =  TMath::Tan(theta) * r1_left - thick_alu;
245   par[9]    =  TMath::Tan(theta) * r2_left - thick_alu;
246
247   gMC->Gsvolu("V0L2","TRAP",idtmed[3002],par,11);  // quartz volume
248   gMC->Gspos("V0L2",1,"V0L0", 0.0, dist2_left , 0.0, 0,"ONLY"); 
249   
250   
251   Float_t   dist3_left;
252   Float_t   r3_left;
253      
254   dist3_left     =    (- height_left + height3_left) /2.0 + height1_left + height2_left;
255   r3_left        =       r2_left + height3_left; 
256    
257   par[0]    =  half_thick_qua1 - thick_alu;   
258   par[3]    =  height3_left / 2.0 - thick_alu;
259   par[4]    =  TMath::Tan(theta) * r2_left - thick_alu;
260   par[5]    =  TMath::Tan(theta) * r3_left - thick_alu;
261   par[7]    =  height3_left / 2.0 - thick_alu;
262   par[8]    =  TMath::Tan(theta) * r2_left - thick_alu;
263   par[9]    =  TMath::Tan(theta) * r3_left - thick_alu;
264
265   gMC->Gsvolu("V0L3","TRAP",idtmed[3002],par,11);  // quartz volume
266   gMC->Gspos("V0L3",1,"V0L0", 0.0, dist3_left , 0.0, 0,"ONLY");
267     
268   Float_t   dist4_left;
269   Float_t   r4_left;
270        
271   dist4_left     =    (- height_left + height4_left) /2.0 + height1_left 
272                                      + height2_left + height3_left;
273   r4_left        =       r3_left + height4_left; 
274    
275   par[0]    =  half_thick_qua1 - thick_alu;   
276   par[3]    =  height4_left / 2.0 - thick_alu;
277   par[4]    =  TMath::Tan(theta) * r3_left - thick_alu;
278   par[5]    =  TMath::Tan(theta) * r4_left - thick_alu;
279   par[7]    =  height4_left / 2.0 - thick_alu;
280   par[8]    =  TMath::Tan(theta) * r3_left - thick_alu;
281   par[9]    =  TMath::Tan(theta) * r4_left - thick_alu;
282
283   gMC->Gsvolu("V0L4","TRAP",idtmed[3002],par,11);  // quartz volume
284   gMC->Gspos("V0L4",1,"V0L0", 0.0, dist4_left , 0.0, 0,"ONLY");
285
286
287   Float_t   dist5_left;
288
289          
290   dist5_left     =    (- height_left + height5_left) /2.0 + height1_left 
291                                      + height2_left + height3_left + height4_left;
292
293    
294   par[0]    =  half_thick_qua1 - thick_alu;   
295   par[3]    =  height5_left / 2.0 - thick_alu;
296   par[4]    =  TMath::Tan(theta) * r4_left - thick_alu;
297   par[5]    =  TMath::Tan(theta) * r5_left - thick_alu;
298   par[7]    =  height5_left / 2.0 - thick_alu;
299   par[8]    =  TMath::Tan(theta) * r4_left - thick_alu;
300   par[9]    =  TMath::Tan(theta) * r5_left - thick_alu;
301
302   gMC->Gsvolu("V0L5","TRAP",idtmed[3002],par,11);  // quartz volume
303   gMC->Gspos("V0L5",1,"V0L0", 0.0, dist5_left , 0.0, 0,"ONLY");
304   
305   
306 //............................................................................
307
308 // Creation of mother volume V0RI - right part - :
309
310   
311   partube[0] = r0 - 0.2;
312   partube[1] = (r5 + 1.0) / TMath::Cos(theta);
313   partube[2] = fThickness/2.0; 
314   
315     
316   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
317   
318 // Creation of  carbon lids (1 mm thick) to keep V0RI box shut...
319
320   Float_t   parbox[10];
321   
322   parbox[0] =    0.;
323   parbox[1] =  360.;
324   parbox[2] =    12;
325   parbox[3] =     2;
326   parbox[4] =  -0.1/2.0;
327   parbox[5] =  r0;
328   parbox[6] =  r5;     
329   parbox[7] =  +0.1/2.0;
330   parbox[8] =  r0;
331   parbox[9] =  r5;  
332   
333   
334   gMC->Gsvolu("V0CA","PGON",idtmed[3001],parbox,10); 
335   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-parbox[7],0,"ONLY");
336   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+parbox[7],0,"ONLY");
337   
338 // Creation of aluminum rings to maintain the V0RI pieces ...
339
340   parbox[4] =  -fThickness/2.0;
341   parbox[5] =  r0 -0.2;
342   parbox[6] =  r0;     
343   parbox[7] =  +fThickness/2.0;
344   parbox[8] =  r0 -0.2;
345   parbox[9] =  r0; 
346   
347   gMC->Gsvolu("V0IR","PGON",idtmed[3003],parbox,10);    
348   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
349   
350   parbox[4] =  -fThickness/2.0;
351   parbox[5] =  r5;
352   parbox[6] =  r5 + 1.0;     
353   parbox[7] =  +fThickness/2.0;
354   parbox[8] =  r5;
355   parbox[9] =  r5 + 1.0; 
356  
357   gMC->Gsvolu("V0ER","PGON",idtmed[3003],parbox,10);    
358   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
359   
360 // Mother volume V0R0 in which will be set 5  quartz cells 
361 // each one  WRAPPED in reflecting aluminum : 
362   
363   Float_t   dist0;   
364     
365   dist0     =  r0 + height / 2.0;
366   thick_alu =  2.0*half_thick_alu;
367   
368   par[0]    =  half_thick_qua1;
369   par[1]    =  0.0;
370   par[2]    =  0.0;
371   par[3]    =  height / 2.0 ;
372   par[4]    =  TMath::Tan(theta) * r0;
373   par[5]    =  TMath::Tan(theta) * r5;
374   par[6]    =  0.0;
375   par[7]    =  height / 2.0 ;
376   par[8]    =  TMath::Tan(theta) * r0;
377   par[9]    =  TMath::Tan(theta) * r5;
378   par[10]   =  0.0;
379
380
381   gMC->Gsvolu("V0R0","TRAP",idtmed[3010],par,11);  // air volume
382
383 // Elementary cell of ring 1 :
384  
385   Float_t   dist1;
386   Float_t   r1;
387   Float_t   offset;
388      
389   dist1     =  (- height + height1) /2.0; 
390   r1        =  r0 + height1;
391   offset    = - fThickness/2.0 + 0.1; 
392    
393   par[0]    =  half_thick_qua1 - thick_alu;
394   par[3]    =  height1 / 2.0 - thick_alu;
395   par[4]    =  TMath::Tan(theta) * r0 - thick_alu;
396   par[5]    =  TMath::Tan(theta) * r1- thick_alu;
397   par[7]    =  height1 / 2.0 - thick_alu;
398   par[8]    =  TMath::Tan(theta) * r0 - thick_alu;
399   par[9]    =  TMath::Tan(theta) * r1 - thick_alu;
400
401
402   gMC->Gsvolu("V0R1","TRAP",idtmed[3002],par,11);  // quartz volume
403   gMC->Gspos("V0R1",1,"V0R0", 0.0, dist1 , 0.0, 0,"ONLY");
404   
405   par[0]    =  half_thick_alu;
406
407   gMC->Gsvolu("V0A1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
408   gMC->Gspos("V0A1",1,"V0R1",0.0,0.0, - half_thick_qua1 + half_thick_alu,0,"ONLY");  
409   gMC->Gspos("V0A1",2,"V0R1",0.0,0.0, + half_thick_qua1 - half_thick_alu,0,"ONLY");  
410
411   parbox[0] = half_thick_alu;
412   parbox[1] = height1 / TMath::Cos(theta)/ 2.0;
413   parbox[2] = half_thick_qua1;
414   
415   gMC->Gsvolu("V0A2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
416   Float_t  theta_deg = 180./6./2.0; 
417   Float_t h1;
418   h1 = TMath::Tan(theta) * (r0 + height1/2.0);  
419   AliMatrix(idrotm[911],90.0,+theta_deg,90.0,90.+theta_deg,0.0,0.);  
420   gMC->Gspos("V0A2",1,"V0R1",-h1 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY"); 
421   AliMatrix(idrotm[912],90.0,-theta_deg,90.0,90.-theta_deg,0.0,0.);  
422   gMC->Gspos("V0A2",2,"V0R1",+h1 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY"); 
423
424   parbox[0] = TMath::Tan(theta) * r0;
425   parbox[1] = half_thick_alu;
426   parbox[2] = half_thick_qua1;
427   gMC->Gsvolu("V0A3","BOX",idtmed[3004],parbox,3);
428   gMC->Gspos("V0A3",1,"V0R1",0.0, - (height1/2.0) + half_thick_alu ,0.0,0,"ONLY");
429     
430
431   parbox[0] = TMath::Tan(theta) * (r0 + height1);
432   parbox[1] = half_thick_alu;
433   parbox[2] = half_thick_qua1;
434   gMC->Gsvolu("V0A4","BOX",idtmed[3004],parbox,3);
435   gMC->Gspos("V0A4",1,"V0R1",0.0, (height1/2.0) - half_thick_alu,0.0,0,"ONLY");
436
437   
438 //  Elementary cell of ring 2 : 
439  
440   Float_t   dist2;
441   Float_t   r2; 
442     
443   dist2     =    (- height + height2) /2.0 + height1;
444   r2        =       r1 + height2; 
445   
446   par[0]    =  half_thick_qua2 - thick_alu;   
447   par[3]    =  height2 / 2.0 - thick_alu;
448   par[4]    =  TMath::Tan(theta) * r1 - thick_alu;
449   par[5]    =  TMath::Tan(theta) * r2 - thick_alu;
450   par[7]    =  height2 / 2.0 - thick_alu;
451   par[8]    =  TMath::Tan(theta) * r1 - thick_alu;
452   par[9]    =  TMath::Tan(theta) * r2 - thick_alu;
453
454   gMC->Gsvolu("V0R2","TRAP",idtmed[3002],par,11);  // quartz volume
455   gMC->Gspos("V0R2",1,"V0R0", 0.0, dist2 , - half_thick_qua1 + half_thick_qua2, 0,"ONLY");
456
457   par[0]    =  half_thick_alu;
458
459   gMC->Gsvolu("V0B1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
460   gMC->Gspos("V0B1",1,"V0R2",0.0,0.0, - half_thick_qua2 + half_thick_alu,0,"ONLY");  
461   gMC->Gspos("V0B1",2,"V0R2",0.0,0.0, + half_thick_qua2 - half_thick_alu,0,"ONLY");  
462
463   parbox[0] = half_thick_alu;
464   parbox[1] = height2 / TMath::Cos(theta)/ 2.0;
465   parbox[2] = half_thick_qua2;
466   
467   gMC->Gsvolu("V0B2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
468   Float_t h2;
469   h2 = TMath::Tan(theta) * (r0  + height1 + height2/2.0);  
470   gMC->Gspos("V0B2",1,"V0R2",-h2 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY"); 
471   gMC->Gspos("V0B2",2,"V0R2",+h2 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY"); 
472
473   parbox[0] = TMath::Tan(theta) * (r0 + height1);
474   parbox[1] = half_thick_alu;
475   parbox[2] = half_thick_qua2;
476   gMC->Gsvolu("V0B3","BOX",idtmed[3004],parbox,3);
477   gMC->Gspos("V0B3",1,"V0R2",0.0, - (height2/2.0) + half_thick_alu ,0.0,0,"ONLY");
478     
479
480   parbox[0] = TMath::Tan(theta) * (r0 + height1 +  height2);
481   parbox[1] = half_thick_alu;
482   parbox[2] = half_thick_qua2;
483   gMC->Gsvolu("V0B4","BOX",idtmed[3004],parbox,3);
484   gMC->Gspos("V0B4",1,"V0R2",0.0, (height2/2.0) - half_thick_alu,0.0,0,"ONLY");
485   
486
487 // Elementary cell  ring 3 :   
488   
489   Float_t   dist3;
490   Float_t   r3; 
491     
492   dist3     =    (- height + height3) /2.0 + height1 + height2;
493   r3        =       r2 + height3; 
494    
495   par[0]    =  half_thick_qua3 - thick_alu;   
496   par[3]    =  height3 / 2.0 - thick_alu;
497   par[4]    =  TMath::Tan(theta) * r2 - thick_alu;
498   par[5]    =  TMath::Tan(theta) * r3 - thick_alu;
499   par[7]    =  height3 / 2.0 - thick_alu;
500   par[8]    =  TMath::Tan(theta) * r2 - thick_alu;
501   par[9]    =  TMath::Tan(theta) * r3 - thick_alu;
502
503   gMC->Gsvolu("V0R3","TRAP",idtmed[3002],par,11);  // quartz volume
504   gMC->Gspos("V0R3",1,"V0R0", 0.0, dist3 , - half_thick_qua1 +  half_thick_qua3, 0,"ONLY");
505
506
507   par[0]    =  half_thick_alu;
508
509   gMC->Gsvolu("V0C1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
510   gMC->Gspos("V0C1",1,"V0R3",0.0,0.0, - half_thick_qua3 + half_thick_alu,0,"ONLY");  
511   gMC->Gspos("V0C1",2,"V0R3",0.0,0.0, + half_thick_qua3 - half_thick_alu,0,"ONLY");  
512
513   parbox[0] = half_thick_alu;
514   parbox[1] = height3 / TMath::Cos(theta)/ 2.0;
515   parbox[2] = half_thick_qua3;
516   
517   gMC->Gsvolu("V0C2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
518   Float_t h3;
519   h3 = TMath::Tan(theta) * (r0  + height1 + height2 + height3/2.0);  
520   gMC->Gspos("V0C2",1,"V0R3",-h3 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY"); 
521   gMC->Gspos("V0C2",2,"V0R3",+h3 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY"); 
522
523   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2);
524   parbox[1] = half_thick_alu;
525   parbox[2] = half_thick_qua3;
526   gMC->Gsvolu("V0C3","BOX",idtmed[3004],parbox,3);
527   gMC->Gspos("V0C3",1,"V0R3",0.0, - (height3/2.0) + half_thick_alu ,0.0,0,"ONLY");
528     
529
530   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3);
531   parbox[1] = half_thick_alu;
532   parbox[2] = half_thick_qua3;
533   gMC->Gsvolu("V0C4","BOX",idtmed[3004],parbox,3);
534   gMC->Gspos("V0C4",1,"V0R3",0.0, (height3/2.0) - half_thick_alu,0.0,0,"ONLY");
535
536
537 // Elementary cell  ring 4 :  
538
539   Float_t   dist4;
540   Float_t   r4; 
541     
542   dist4     =    (- height + height4) /2.0 + height1 + height2 + height3;
543   r4        =       r3 + height4; 
544    
545   par[0]    =  half_thick_qua4 - thick_alu;   
546   par[3]    =  height4 / 2.0 - thick_alu;
547   par[4]    =  TMath::Tan(theta) * r3 - thick_alu;
548   par[5]    =  TMath::Tan(theta) * r4 - thick_alu;
549   par[7]    =  height4 / 2.0 - thick_alu;
550   par[8]    =  TMath::Tan(theta) * r3 - thick_alu;
551   par[9]    =  TMath::Tan(theta) * r4 - thick_alu;
552
553   gMC->Gsvolu("V0R4","TRAP",idtmed[3002],par,11);  // quartz volume
554   gMC->Gspos("V0R4",1,"V0R0", 0.0, dist4 , - half_thick_qua1 + half_thick_qua4, 0,"ONLY"); 
555
556
557   par[0]    =  half_thick_alu;
558
559   gMC->Gsvolu("V0D1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
560   gMC->Gspos("V0D1",1,"V0R4",0.0,0.0, - half_thick_qua4 + half_thick_alu,0,"ONLY");  
561   gMC->Gspos("V0D1",2,"V0R4",0.0,0.0, + half_thick_qua4 - half_thick_alu,0,"ONLY");  
562
563   parbox[0] = half_thick_alu;
564   parbox[1] = height4 / TMath::Cos(theta)/ 2.0;
565   parbox[2] = half_thick_qua4;
566   
567   gMC->Gsvolu("V0D2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
568   Float_t h4;
569   h4 = TMath::Tan(theta) * (r0  + height1 + height2 + height3 + height4/2.0);  
570   gMC->Gspos("V0D2",1,"V0R4",-h4 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY"); 
571   gMC->Gspos("V0D2",2,"V0R4",+h4 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY"); 
572
573   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3);
574   parbox[1] = half_thick_alu;
575   parbox[2] = half_thick_qua4;
576   gMC->Gsvolu("V0D3","BOX",idtmed[3004],parbox,3);
577   gMC->Gspos("V0D3",1,"V0R4",0.0, - (height4/2.0) + half_thick_alu ,0.0,0,"ONLY");
578     
579
580   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3 + height4);
581   parbox[1] = half_thick_alu;
582   parbox[2] = half_thick_qua4;
583   gMC->Gsvolu("V0D4","BOX",idtmed[3004],parbox,3);
584   gMC->Gspos("V0D4",1,"V0R4",0.0, (height4/2.0) - half_thick_alu,0.0,0,"ONLY");
585
586
587 // Elementary cell  ring 5 :  
588
589   Float_t   dist5;
590       
591   dist5     =    (- height + height5) /2.0 + height1 + height2 + height3 + height4;
592   
593   par[0]    =  half_thick_qua5 - thick_alu;      
594   par[3]    =  height5 / 2.0 - thick_alu;
595   par[4]    =  TMath::Tan(theta) * r4 - thick_alu;
596   par[5]    =  TMath::Tan(theta) * r5 - thick_alu;
597   par[7]    =  height5 / 2.0 - thick_alu;
598   par[8]    =  TMath::Tan(theta) * r4 - thick_alu;
599   par[9]    =  TMath::Tan(theta) * r5 - thick_alu;
600
601   gMC->Gsvolu("V0R5","TRAP",idtmed[3002],par,11);  // quartz volume
602   gMC->Gspos("V0R5",1,"V0R0", 0.0, dist5 , - half_thick_qua1 +  half_thick_qua5, 0,"ONLY"); 
603
604
605   par[0]    =  half_thick_alu;
606
607   gMC->Gsvolu("V0E1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
608   gMC->Gspos("V0E1",1,"V0R5",0.0,0.0, - half_thick_qua5 + half_thick_alu,0,"ONLY");  
609   gMC->Gspos("V0E1",2,"V0R5",0.0,0.0, + half_thick_qua5 - half_thick_alu,0,"ONLY");  
610
611   parbox[0] = half_thick_alu;
612   parbox[1] = height5 / TMath::Cos(theta)/ 2.0;
613   parbox[2] = half_thick_qua5;
614   
615   gMC->Gsvolu("V0E2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
616   Float_t h5;
617   h5 = TMath::Tan(theta) * (r0  + height1 + height2 + height3 + height4 + height5/2.0);  
618   gMC->Gspos("V0E2",1,"V0R5",-h5 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY"); 
619   gMC->Gspos("V0E2",2,"V0R5",+h5 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY"); 
620
621   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3 + height4);
622   parbox[1] = half_thick_alu;
623   parbox[2] = half_thick_qua5;
624   gMC->Gsvolu("V0E3","BOX",idtmed[3004],parbox,3);
625   gMC->Gspos("V0E3",1,"V0R5",0.0, - (height5/2.0) + half_thick_alu ,0.0,0,"ONLY");
626     
627
628   parbox[0] = TMath::Tan(theta) * r5;
629   parbox[1] = half_thick_alu;
630   parbox[2] = half_thick_qua5;
631   gMC->Gsvolu("V0E4","BOX",idtmed[3004],parbox,3);
632   gMC->Gspos("V0E4",1,"V0R5",0.0, (height5/2.0) - half_thick_alu,0.0,0,"ONLY");
633
634
635   Float_t  phi_rad ;  
636   Float_t  phi_deg = 180./6.; 
637
638  // Partie de droite : 
639  
640   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phi_deg)
641       {
642         phi_rad = phi*pi/180.;
643         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
644         gMC->Gspos("V0R0",n_detec_R,"V0RI",-dist0*TMath::Sin(phi_rad),
645                           dist0*TMath::Cos(phi_rad),offset + half_thick_qua1,idrotm[902],"ONLY");
646         n_detec_R++;
647        }
648
649
650   gMC->Gspos("V0RI",1,"alic",0.0,0.0,zdet,0,"ONLY");
651  
652   n_cells_R = (n_detec_R - 1) * 5;
653   printf(" \n\n\n"); 
654   printf("    Number of cells on Right side =   %d\n",  n_cells_R);    
655
656 // Partie de gauche :
657
658   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phi_deg)
659       {
660         phi_rad = phi*pi/180.;
661         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
662         gMC->Gspos("V0L0",n_detec_L,"V0LE",-dist0_left*TMath::Sin(phi_rad),
663                           dist0_left*TMath::Cos(phi_rad),offset_left + half_thick_qua1,idrotm[902],"ONLY");
664         n_detec_L++;
665        }
666
667
668   gMC->Gspos("V0LE",1,"alic",0.0,0.0,-350.0-fThickness1/2.0,0,"ONLY");
669  
670   n_cells_L = (n_detec_L - 1) * 5;
671   printf(" \n\n\n"); 
672   printf("    Number of cells on Left side  =   %d\n\n",  n_cells_L);    
673
674          
675 }
676     
677     
678     
679 //_____________________________________________________________________________
680 void AliVZEROv0::BuildGeometry()
681 {
682   
683   // Builds simple ROOT TNode geometry for event display
684
685   
686   Int_t i;
687
688   printf("\n");
689   for(i=0;i<30;i++) printf("*");
690   printf(" VZERO BuildGeometry ");
691   for(i=0;i<30;i++) printf("*");
692   printf("\n");
693   
694   TNode *Top; 
695
696   TNode *V0Rnode, *V0Rnode0, *V0Rnode6 , *V0Rnode7, *V0Rnode8, *V0Rnode9;
697   TNode *V0Rnode1, *V0Rnode2, *V0Rnode3, *V0Rnode4, *V0Rnode5;
698   TNode *V0Lnode, *V0Lnode0;
699   TNode *V0Lnode1, *V0Lnode2, *V0Lnode3, *V0Lnode4, *V0Lnode5;
700    
701   const int kColorVZERO  = kGreen;
702  
703   Top = gAlice->GetGeometry()->GetNode("alice");
704
705   Float_t  height1, height2, height3, height4, height5; 
706   Float_t  height;
707   Float_t  theta;  
708   Float_t  half_thick_alu;
709   Float_t  half_thick_qua1,half_thick_qua2,half_thick_qua3;
710   Float_t  half_thick_qua4,half_thick_qua5;
711   Float_t  zdet;
712   Float_t  r0, r5;
713   Float_t  pi = TMath::Pi();
714   Float_t  thick_alu;
715   
716 //   height1           =     1.9;         
717 //   height2           =     3.7; 
718 //   height3           =     6.2;
719 //   height4           =    10.5;
720 //   height5           =    10.5;
721
722   height1           =     2.0;           // height of cell 1, in cm
723   height2           =     3.2;           // height of cell 2, in cm
724   height3           =     4.9;           // height of cell 3, in cm
725   height4           =     7.5;           // height of cell 4, in cm
726   height5           =    12.0;           // height of cell 5, in cm
727   
728   theta             = pi/6.0/2.0;    
729   half_thick_alu    = 0.0025;        
730   thick_alu         = 2.0 * half_thick_alu; 
731   half_thick_qua1   = fThickness1/2.0; 
732   half_thick_qua2   = half_thick_qua1  - 0.25;
733   half_thick_qua3   = half_thick_qua2  - 0.25;
734   half_thick_qua4   = half_thick_qua3  - 0.25;
735   half_thick_qua5   = half_thick_qua4  - 0.25;
736   
737   zdet              =    86.9 +fThickness/2.0;   
738   r0                =    4.0;         
739   height            =    height1 + height2 + height3 + height4 + height5;
740   r5                =    r0 + height;
741
742   Float_t   partube[3];
743
744   partube[0] =  r0 - 0.2;
745   partube[1] = (r5 + 1.0) / TMath::Cos(theta);
746   partube[2] = fThickness/2.0;   
747   
748   TTUBE *V0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
749                 
750   Top->cd();
751   
752   V0Rnode = new TNode("V0RI","V0RI",V0RI,0.0,0.0,+zdet,0);
753   
754   V0Rnode->SetLineColor(kBlue);
755   fNodes->Add(V0Rnode);
756   
757   V0Rnode->SetVisibility(2);
758      
759  
760 // Rondelles de carbone (epaisseur 1 mm) de maintien des cellules ...
761  
762
763   Float_t   parbox[10];
764  
765   parbox[0] =    0.;
766   parbox[1] =  360.;
767   parbox[2] =    12;
768   parbox[3] =     2;
769   parbox[4] =  -0.1/2.0;
770   parbox[5] =  r0;
771   parbox[6] =  r5;     
772   parbox[7] =  +0.1/2.0;
773   parbox[8] =  r0;
774   parbox[9] =  r5;  
775   
776   
777   TPGON *V0CA = new TPGON("V0CA", "V0CA", "void",parbox[0], parbox[1],
778                             parbox[2],parbox[3]);
779                             
780   V0CA->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
781   V0CA->DefineSection( 1, parbox[7], parbox[8], parbox[9] ); 
782    
783   V0Rnode->cd();
784   V0Rnode6 = new TNode("V0CA", "V0CA",V0CA,0.0,0.0, fThickness/2.0-parbox[7],0);         
785   V0Rnode6->SetLineColor(kYellow);
786   fNodes->Add(V0Rnode6); 
787   V0Rnode->cd();
788   V0Rnode7 = new TNode("V0CA", "V0CA",V0CA,0.0,0.0,-fThickness/2.0+parbox[7],0);         
789   V0Rnode7->SetLineColor(kYellow);
790   fNodes->Add(V0Rnode7);
791   
792   parbox[4] =  -fThickness/2.0;
793   parbox[5] =  r0 - 0.2;
794   parbox[6] =  r0;     
795   parbox[7] =  +fThickness/2.0;
796   parbox[8] =  r0 - 0.2;
797   parbox[9] =  r0; 
798
799   TPGON  *V0IR = new TPGON("V0IR","V0IR","void",  parbox[0], parbox[1],
800                             parbox[2],parbox[3]);
801   V0IR->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
802   V0IR->DefineSection( 1, parbox[7], parbox[8], parbox[9] );
803   
804   V0Rnode->cd();
805   V0Rnode8 = new TNode("V0IR", "V0IR",V0IR,0.0,0.0,0.0,0);
806   V0Rnode8->SetLineColor(kYellow);
807   fNodes->Add(V0Rnode8);
808  
809   parbox[4] =  -fThickness/2.0;
810   parbox[5] =  r5;
811   parbox[6] =  r5 + 1.0;     
812   parbox[7] =  +fThickness/2.0;
813   parbox[8] =  r5;
814   parbox[9] =  r5 + 1.0; 
815
816   TPGON  *V0ER = new TPGON("V0ER","V0ER","void",  parbox[0], parbox[1],
817                             parbox[2],parbox[3]);
818   V0ER->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
819   V0ER->DefineSection( 1, parbox[7], parbox[8], parbox[9] );
820   
821   V0Rnode->cd();
822   V0Rnode9 = new TNode("V0ER", "V0ER",V0ER,0.0,0.0,0.0,0);
823   V0Rnode9->SetLineColor(kYellow);
824   fNodes->Add(V0Rnode9);
825
826   Float_t   dist0; 
827   Float_t   par[11];   
828     
829   dist0     =  r0 + height / 2.0;
830   thick_alu =  2.0*half_thick_alu;
831   
832   par[0]    =  half_thick_qua1;
833   par[1]    =  0.0;
834   par[2]    =  0.0;
835   par[3]    =  height / 2.0 ;
836   par[4]    =  TMath::Tan(theta) * r0;
837   par[5]    =  TMath::Tan(theta) * r5;
838   par[6]    =  0.0;
839   par[7]    =  height / 2.0 ;
840   par[8]    =  TMath::Tan(theta) * r0;
841   par[9]    =  TMath::Tan(theta) * r5;
842   par[10]   =  0.0;
843     
844   TTRAP *V0R0 = new TTRAP("V0R0", "V0R0", "void", par[0], par[1], par[2], par[3],
845                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
846                 
847   Float_t   dist1;
848   Float_t   r1;
849   Float_t   offset; 
850     
851   dist1     =  (- height + height1) /2.0; 
852   r1        =  r0 + height1;
853   offset    = - fThickness/2.0 + 0.1; 
854    
855   par[0]    =  half_thick_qua1 - thick_alu;
856   par[3]    =  height1 / 2.0 - thick_alu;
857   par[4]    =  TMath::Tan(theta) * r0 - thick_alu;
858   par[5]    =  TMath::Tan(theta) * r1- thick_alu;
859   par[7]    =  height1 / 2.0 - thick_alu;
860   par[8]    =  TMath::Tan(theta) * r0 - thick_alu;
861   par[9]    =  TMath::Tan(theta) * r1 - thick_alu;
862   
863   TTRAP *V0R1 = new TTRAP("V0R1", "V0R1", "void", par[0], par[1], par[2], par[3],
864                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
865                 
866
867   Float_t   dist2;
868   Float_t   r2; 
869     
870   dist2     =    (- height + height2) /2.0 + height1;
871   r2        =       r1 + height2; 
872   
873   par[0]    =  half_thick_qua2 - thick_alu;   
874   par[3]    =  height2 / 2.0 - thick_alu;
875   par[4]    =  TMath::Tan(theta) * r1 - thick_alu;
876   par[5]    =  TMath::Tan(theta) * r2 - thick_alu;
877   par[7]    =  height2 / 2.0 - thick_alu;
878   par[8]    =  TMath::Tan(theta) * r1 - thick_alu;
879   par[9]    =  TMath::Tan(theta) * r2 - thick_alu;
880
881
882   TTRAP *V0R2 = new TTRAP("V0R2", "V0R2", "void", par[0], par[1], par[2], par[3],
883                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
884  
885
886   Float_t   dist3;
887   Float_t   r3; 
888     
889   dist3     =    (- height + height3) /2.0 + height1 + height2;
890   r3        =       r2 + height3; 
891    
892   par[0]    =  half_thick_qua3 - thick_alu;   
893   par[3]    =  height3 / 2.0 - thick_alu;
894   par[4]    =  TMath::Tan(theta) * r2 - thick_alu;
895   par[5]    =  TMath::Tan(theta) * r3 - thick_alu;
896   par[7]    =  height3 / 2.0 - thick_alu;
897   par[8]    =  TMath::Tan(theta) * r2 - thick_alu;
898   par[9]    =  TMath::Tan(theta) * r3 - thick_alu;
899
900
901   TTRAP *V0R3 = new TTRAP("V0R3", "V0R3", "void", par[0], par[1], par[2], par[3],
902                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
903  
904
905   Float_t   dist4;
906   Float_t   r4; 
907     
908   dist4     =    (- height + height4) /2.0 + height1 + height2 + height3;
909   r4        =       r3 + height4; 
910    
911   par[0]    =  half_thick_qua4 - thick_alu;   
912   par[3]    =  height4 / 2.0 - thick_alu;
913   par[4]    =  TMath::Tan(theta) * r3 - thick_alu;
914   par[5]    =  TMath::Tan(theta) * r4 - thick_alu;
915   par[7]    =  height4 / 2.0 - thick_alu;
916   par[8]    =  TMath::Tan(theta) * r3 - thick_alu;
917   par[9]    =  TMath::Tan(theta) * r4 - thick_alu;
918
919
920   TTRAP *V0R4 = new TTRAP("V0R4", "V0R4", "void", par[0], par[1], par[2], par[3],
921                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
922
923
924   Float_t   dist5;
925     
926   dist5     =    (- height + height5) /2.0 + height1 + height2 + height3 + height4;
927   
928   par[0]    =  half_thick_qua5 - thick_alu;      
929   par[3]    =  height5 / 2.0 - thick_alu;
930   par[4]    =  TMath::Tan(theta) * r4 - thick_alu;
931   par[5]    =  TMath::Tan(theta) * r5 - thick_alu;
932   par[7]    =  height5 / 2.0 - thick_alu;
933   par[8]    =  TMath::Tan(theta) * r4 - thick_alu;
934   par[9]    =  TMath::Tan(theta) * r5 - thick_alu;
935
936
937   TTRAP *V0R5 = new TTRAP("V0R5", "V0R5", "void", par[0], par[1], par[2], par[3],
938                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
939
940                 
941   Float_t  phi;
942   Float_t  phi_deg= 180./6.;
943   Float_t  phi_rad;
944   Float_t  xdet,ydet;
945   Int_t    n_detec_R = 1; 
946
947   char     NameNode[12];  
948
949  
950   for (phi = 15.0; phi < 360.0; phi = phi + phi_deg) 
951   {
952      
953     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );        
954     
955     phi_rad = phi*pi/180.;
956     xdet = dist0*TMath::Sin(phi_rad);
957     ydet = dist0*TMath::Cos(phi_rad);
958     
959   
960     sprintf(NameNode,"SUBDER%d",n_detec_R);
961     
962     V0Rnode->cd();
963     V0Rnode0 = new TNode(NameNode,NameNode,V0R0,-xdet,ydet, offset + half_thick_qua1,mat920);    
964     V0Rnode0->SetLineColor(kColorVZERO);
965     fNodes->Add(V0Rnode0);
966     n_detec_R++;
967     
968     sprintf(NameNode,"SUBDER%d",n_detec_R);
969     V0Rnode0->cd();    
970     V0Rnode1 = new TNode(NameNode,NameNode,V0R1,0.0,dist1, 0.0,0);       
971     V0Rnode1->SetLineColor(kColorVZERO);
972     fNodes->Add(V0Rnode1);
973     n_detec_R++;
974     
975     sprintf(NameNode,"SUBDER%d",n_detec_R);
976     V0Rnode0->cd();    
977     V0Rnode2 = new TNode(NameNode,NameNode,V0R2,0.0,dist2, - half_thick_qua1 + half_thick_qua2,0);       
978     V0Rnode2->SetLineColor(kColorVZERO);
979     fNodes->Add(V0Rnode2);
980     n_detec_R++;
981
982
983     sprintf(NameNode,"SUBDER%d",n_detec_R);
984     V0Rnode0->cd();    
985     V0Rnode3 = new TNode(NameNode,NameNode,V0R3,0.0,dist3, - half_thick_qua1 + half_thick_qua3,0);       
986     V0Rnode3->SetLineColor(kColorVZERO);
987     fNodes->Add(V0Rnode3);
988     n_detec_R++;
989
990     sprintf(NameNode,"SUBDER%d",n_detec_R);
991     V0Rnode0->cd();    
992     V0Rnode4 = new TNode(NameNode,NameNode,V0R4,0.0,dist4, - half_thick_qua1 + half_thick_qua4,0);       
993     V0Rnode4->SetLineColor(kColorVZERO);
994     fNodes->Add(V0Rnode4);
995     n_detec_R++;
996      
997     sprintf(NameNode,"SUBDER%d",n_detec_R);
998     V0Rnode0->cd();    
999     V0Rnode5 = new TNode(NameNode,NameNode,V0R5,0.0,dist5, - half_thick_qua1 + half_thick_qua5,0);       
1000     V0Rnode5->SetLineColor(kColorVZERO);
1001     fNodes->Add(V0Rnode5);
1002     n_detec_R++;
1003        
1004     V0Rnode0->SetVisibility(2);
1005     
1006   }  
1007
1008
1009 // Left side of VZERO :
1010   
1011   
1012   Float_t   dist0_left;   
1013   Float_t   r0_left      =   4.3;   
1014   Float_t   height1_left =   2.6; 
1015   Float_t   height2_left =   4.1;
1016   Float_t   height3_left =   6.4;
1017   Float_t   height4_left =  10.2;
1018   Float_t   height5_left =  16.9;
1019   Float_t   height_left  = height1_left + height2_left + height3_left 
1020                                         + height4_left + height5_left;
1021   Float_t   r5_left      = r0_left  + height_left; 
1022
1023   partube[0] =  r0_left;
1024   partube[1] = (r5_left) / TMath::Cos(theta);
1025   partube[2] = fThickness1/2.0; 
1026   
1027   TTUBE *V0LE = new TTUBE("V0LE", "V0LE", "void", partube[0], partube[1], partube[2]);
1028                 
1029   Top->cd();
1030   
1031   V0Lnode = new TNode("V0LE","V0LE",V0LE,0.0,0.0,-350.0-fThickness1/2.0,0);
1032   
1033   V0Lnode->SetLineColor(kBlue);
1034   fNodes->Add(V0Lnode);
1035   
1036   V0Lnode->SetVisibility(2);
1037   
1038   dist0_left  =  r0_left + height_left / 2.0;
1039   thick_alu   =  2.0*half_thick_alu;
1040   
1041   par[0]      =  half_thick_qua1;
1042   par[1]      =  0.0;
1043   par[2]      =  0.0;
1044   par[3]      =  height_left / 2.0 ;
1045   par[4]      =  TMath::Tan(theta) * r0_left;
1046   par[5]      =  TMath::Tan(theta) * r5_left;
1047   par[6]      =  0.0;
1048   par[7]      =  height_left / 2.0 ;
1049   par[8]      =  TMath::Tan(theta) * r0_left;
1050   par[9]      =  TMath::Tan(theta) * r5_left;
1051   par[10]     =  0.0;
1052   
1053   TTRAP *V0L0 = new TTRAP("V0L0", "V0L0", "void", par[0], par[1], par[2], par[3],
1054                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1055                 
1056   
1057   Float_t   dist1_left;
1058   Float_t   r1_left;
1059   Float_t   offset_left;
1060      
1061   dist1_left     =  (- height_left + height1_left) /2.0; 
1062   r1_left        =  r0_left + height1_left;
1063   offset_left    = - fThickness1/2.0 + 0.1; 
1064    
1065   par[0]    =  half_thick_qua1 - thick_alu;
1066   par[3]    =  height1_left / 2.0 - thick_alu;
1067   par[4]    =  TMath::Tan(theta) * r0_left - thick_alu;
1068   par[5]    =  TMath::Tan(theta) * r1_left- thick_alu;
1069   par[7]    =  height1_left / 2.0 - thick_alu;
1070   par[8]    =  TMath::Tan(theta) * r0_left - thick_alu;
1071   par[9]    =  TMath::Tan(theta) * r1_left - thick_alu;
1072
1073   TTRAP *V0L1 = new TTRAP("V0L1", "V0L1", "void", par[0], par[1], par[2], par[3],
1074                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1075  
1076   Float_t   dist2_left;
1077   Float_t   r2_left; 
1078     
1079   dist2_left     =    (- height_left + height2_left) /2.0 + height1_left;
1080   r2_left        =       r1_left + height2_left; 
1081   
1082   par[0]    =  half_thick_qua1 - thick_alu;   
1083   par[3]    =  height2_left / 2.0 - thick_alu;
1084   par[4]    =  TMath::Tan(theta) * r1_left - thick_alu;
1085   par[5]    =  TMath::Tan(theta) * r2_left - thick_alu;
1086   par[7]    =  height2_left / 2.0 - thick_alu;
1087   par[8]    =  TMath::Tan(theta) * r1_left - thick_alu;
1088   par[9]    =  TMath::Tan(theta) * r2_left - thick_alu;
1089
1090   TTRAP *V0L2 = new TTRAP("V0L2", "V0L2", "void", par[0], par[1], par[2], par[3],
1091                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1092  
1093
1094   
1095   Float_t   dist3_left;
1096   Float_t   r3_left;
1097      
1098   dist3_left     =    (- height_left + height3_left) /2.0 + height1_left + height2_left;
1099   r3_left        =       r2_left + height3_left; 
1100    
1101   par[0]    =  half_thick_qua1 - thick_alu;   
1102   par[3]    =  height3_left / 2.0 - thick_alu;
1103   par[4]    =  TMath::Tan(theta) * r2_left - thick_alu;
1104   par[5]    =  TMath::Tan(theta) * r3_left - thick_alu;
1105   par[7]    =  height3_left / 2.0 - thick_alu;
1106   par[8]    =  TMath::Tan(theta) * r2_left - thick_alu;
1107   par[9]    =  TMath::Tan(theta) * r3_left - thick_alu;
1108   
1109   TTRAP *V0L3 = new TTRAP("V0L3", "V0L3", "void", par[0], par[1], par[2], par[3],
1110                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1111  
1112    
1113   Float_t   dist4_left;
1114   Float_t   r4_left;
1115        
1116   dist4_left     =    (- height_left + height4_left) /2.0 + height1_left 
1117                                      + height2_left + height3_left;
1118   r4_left        =       r3_left + height4_left; 
1119    
1120   par[0]    =  half_thick_qua1 - thick_alu;   
1121   par[3]    =  height4_left / 2.0 - thick_alu;
1122   par[4]    =  TMath::Tan(theta) * r3_left - thick_alu;
1123   par[5]    =  TMath::Tan(theta) * r4_left - thick_alu;
1124   par[7]    =  height4_left / 2.0 - thick_alu;
1125   par[8]    =  TMath::Tan(theta) * r3_left - thick_alu;
1126   par[9]    =  TMath::Tan(theta) * r4_left - thick_alu;
1127   
1128   TTRAP *V0L4 = new TTRAP("V0L4", "V0L4", "void", par[0], par[1], par[2], par[3],
1129                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1130                 
1131
1132   Float_t   dist5_left;
1133
1134          
1135   dist5_left     =    (- height_left + height5_left) /2.0 + height1_left 
1136                                      + height2_left + height3_left + height4_left;
1137
1138    
1139   par[0]    =  half_thick_qua1 - thick_alu;   
1140   par[3]    =  height5_left / 2.0 - thick_alu;
1141   par[4]    =  TMath::Tan(theta) * r4_left - thick_alu;
1142   par[5]    =  TMath::Tan(theta) * r5_left - thick_alu;
1143   par[7]    =  height5_left / 2.0 - thick_alu;
1144   par[8]    =  TMath::Tan(theta) * r4_left - thick_alu;
1145   par[9]    =  TMath::Tan(theta) * r5_left - thick_alu;
1146   
1147   TTRAP *V0L5 = new TTRAP("V0L5", "V0L5", "void", par[0], par[1], par[2], par[3],
1148                 par[4], par[5], par[6], par[7], par[8], par[9], par[10]);
1149
1150
1151   Int_t    n_detec_L = 1;
1152  
1153   for (phi = 15.0; phi < 360.0; phi = phi + phi_deg) 
1154   {
1155      
1156     TRotMatrix* mat920 = new TRotMatrix("rot920","rot920", 90.0, +phi, 90., 90.+phi, 0.0, 0.0 );        
1157     
1158     phi_rad = phi*pi/180.;
1159     xdet = dist0_left*TMath::Sin(phi_rad);
1160     ydet = dist0_left*TMath::Cos(phi_rad);
1161     
1162   
1163     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1164     
1165     V0Lnode->cd();
1166     V0Lnode0 = new TNode(NameNode,NameNode,V0L0,-xdet,ydet, offset_left + half_thick_qua1,mat920);       
1167     V0Lnode0->SetLineColor(kColorVZERO);
1168     fNodes->Add(V0Lnode0);
1169     n_detec_L++;
1170     
1171     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1172     V0Lnode0->cd();    
1173     V0Lnode1 = new TNode(NameNode,NameNode,V0L1,0.0,dist1_left, 0.0,0);  
1174     V0Lnode1->SetLineColor(kColorVZERO);
1175     fNodes->Add(V0Lnode1);
1176     n_detec_L++;
1177     
1178     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1179     V0Lnode0->cd();    
1180     V0Lnode2 = new TNode(NameNode,NameNode,V0L2,0.0,dist2_left, 0.0,0);  
1181     V0Lnode2->SetLineColor(kColorVZERO);
1182     fNodes->Add(V0Lnode2);
1183     n_detec_L++;
1184
1185
1186     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1187     V0Lnode0->cd();    
1188     V0Lnode3 = new TNode(NameNode,NameNode,V0L3,0.0,dist3_left, 0.0,0);  
1189     V0Lnode3->SetLineColor(kColorVZERO);
1190     fNodes->Add(V0Lnode3);
1191     n_detec_L++;
1192
1193     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1194     V0Lnode0->cd();    
1195     V0Lnode4 = new TNode(NameNode,NameNode,V0L4,0.0,dist4_left, 0.0,0);  
1196     V0Lnode4->SetLineColor(kColorVZERO);
1197     fNodes->Add(V0Lnode4);
1198     n_detec_L++;
1199      
1200     sprintf(NameNode,"SUBDEL%d",n_detec_L);
1201     V0Lnode0->cd();    
1202     V0Lnode5 = new TNode(NameNode,NameNode,V0L5,0.0,dist5_left, 0.0,0);  
1203     V0Lnode5->SetLineColor(kColorVZERO);
1204     fNodes->Add(V0Lnode5);
1205     n_detec_L++;
1206        
1207     V0Lnode0->SetVisibility(2);
1208     
1209   }    
1210
1211         
1212 }  
1213     
1214
1215 //------------------------------------------------------------------------
1216 void AliVZEROv0::CreateMaterials()
1217 {
1218     Int_t i;
1219
1220     printf("\n");
1221     for(i=0;i<30;i++) printf("*");
1222     printf(" VZERO create materials ");
1223     for(i=0;i<30;i++) printf("*");
1224     printf("\n");
1225     
1226
1227     Float_t ppckov[14] = { 5.5e-9, 5.7e-9, 5.9e-9, 6.1e-9, 6.3e-9, 6.5e-9, 6.7e-9, 
1228                            6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
1229
1230            
1231     Float_t ppckov_alu[14] = { 5.5e-9, 5.7e-9, 5.9e-9, 6.1e-9, 6.3e-9, 6.5e-9, 6.7e-9, 
1232                                6.9e-9, 7.1e-9, 7.3e-9, 7.5e-9, 7.7e-9, 7.9e-9, 8.1e-9 };
1233                            
1234     Float_t rindex_quarz[14] = { 1.52398,  1.53090, 1.53835, 1.54641, 1.55513, 1.56458, 
1235                                  1.57488,  1.58611, 1.59842, 1.61197, 1.62696, 1.64362, 
1236                                  1.662295, 1.68337 };
1237                                  
1238     Float_t absco_quarz[14] = { 105.8,  45.656, 35.665, 28.598, 25.007, 21.04, 17.525, 
1239                                 14.177, 9.282, 4.0925, 1.149, 0.3627, 0.1497, 0.05 };   
1240                                                                                         
1241     Float_t effic_all[14]   = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
1242     
1243         
1244     Float_t rindex_alu[14] = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. }; 
1245     
1246     
1247     Float_t absco_alu[14]  = { 1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,1e-4,
1248                                1e-4,1e-4,1e-4,1e-4 };
1249     Float_t effic_alu[14]  = { 1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1.,1. };
1250
1251
1252     Int_t *idtmed = fIdtmed->GetArray()-2999;
1253     
1254     
1255 //  Parameters related to Quarz (SiO2) :
1256  
1257     Float_t aqua[2], zqua[2], densqua, wmatqua[2];
1258     Int_t nlmatqua;
1259     
1260     aqua[0]    = 28.09;
1261     aqua[1]    = 16.;
1262     zqua[0]    = 14.;
1263     zqua[1]    = 8.;
1264     densqua    = 2.64;
1265     nlmatqua   = -2;
1266     wmatqua[0] = 1.;
1267     wmatqua[1] = 2.;
1268
1269 // Parameters  related to aluminum sheets :
1270     
1271     Float_t  aal   = 26.98;
1272     Float_t  zal   = 13.00; 
1273     Float_t  densal=   2.7; 
1274     Float_t  radlal=   8.9;
1275        
1276 // Parameters  related to scintillator CH :
1277     
1278     Float_t ascin[2] = {1.01,12.01};
1279     Float_t zscin[2] = {1,6};
1280     Float_t wscin[2] = {1,1};
1281     Float_t denscin  = 1.03;
1282     
1283 //  Definition of materials :
1284        
1285     AliMaterial( 1, "AIR A$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
1286     AliMaterial(11, "AIR I$", 14.61, 7.3, .001205, 30420., 67500, 0, 0);
1287     AliMaterial( 2, "CARBON$"  , 12.01, 6.0, 2.265, 18.8, 49.9, 0, 0);
1288     AliMixture(  3, "QUA", aqua, zqua, densqua, nlmatqua, wmatqua);
1289     AliMaterial( 4, "ALUMINIUM1$", 26.98, 13., 2.7, 8.9, 37.2, 0, 0);
1290     AliMaterial( 5, "ALUMINIUM2$", aal, zal, densal, radlal, 0, 0, 0);
1291     
1292     
1293     AliMixture( 6, "Scintillator$",ascin,zscin,denscin,-2,wscin);
1294     
1295      
1296     Int_t   ISXFLD = gAlice->Field()->Integ();
1297     Float_t SXMGMX = gAlice->Field()->Max();
1298     
1299     Float_t tmaxfd, stemax, deemax, epsil, stmin;
1300     
1301     tmaxfd = 10.;
1302     stemax = 0.1;
1303     deemax = 0.1;     
1304     epsil  = 0.001;
1305     stmin  = 0.001;
1306               
1307     printf(" \n");
1308     printf(" StepQua,    StepAlu    = %f %f \n",fMaxStepQua,fMaxStepAlu);
1309     printf(" DeStepQua,  DeStepAlu  = %f %f \n",fMaxDestepQua,fMaxDestepAlu);
1310     printf(" \n");    
1311
1312
1313 //  Active Air :    
1314     AliMedium(1, "ACTIVE AIR$", 1, 1, ISXFLD, SXMGMX,
1315               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
1316
1317 //  Inactive air : 
1318   
1319     AliMedium(11, "INACTIVE AIR$", 11, 0, ISXFLD, SXMGMX,
1320               10.0, 1.0, 0.1, 0.1, 10.0, 0, 0) ;
1321     
1322     AliMedium(2, "CARBON$ ", 2,  1, ISXFLD, SXMGMX,
1323               tmaxfd, stemax, deemax, epsil, stmin, 0, 0);   
1324
1325     AliMedium(3, "QUARZ$", 3, 1, ISXFLD, SXMGMX,
1326               tmaxfd, fMaxStepQua, fMaxDestepQua, epsil, stmin, 0, 0);
1327     
1328     AliMedium(4,"ALUMINUM1$",4, 1, ISXFLD, SXMGMX,
1329               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);
1330               
1331
1332     AliMedium(5,"ALUMINUM2$",5, 1, ISXFLD, SXMGMX,
1333               tmaxfd, fMaxStepAlu, fMaxDestepAlu, epsil, stmin, 0, 0);    
1334
1335     AliMedium(6,"SCINTILLATOR$",6, 1, ISXFLD, SXMGMX, 10., .01, 1., .003, .003, 0, 0);
1336
1337     gMC->Gstpar(idtmed[3000], "LOSS", 1.);  //  [3000] = air ACTIF  [3010] = air INACTIF
1338     gMC->Gstpar(idtmed[3000], "HADR", 1.);
1339     gMC->Gstpar(idtmed[3000], "DCAY", 1.);
1340     gMC->Gstpar(idtmed[3000], "DRAY", 1.);
1341     
1342     gMC->Gstpar(idtmed[3001], "LOSS", 1.);  //  [3001] = carbon
1343     gMC->Gstpar(idtmed[3001], "HADR", 1.);
1344     gMC->Gstpar(idtmed[3001], "DCAY", 1.);
1345     gMC->Gstpar(idtmed[3001], "DRAY", 1.);
1346
1347     gMC->Gstpar(idtmed[3002], "LOSS", 1.);  //  [3002] = quartz
1348     gMC->Gstpar(idtmed[3002], "HADR", 1.);
1349     gMC->Gstpar(idtmed[3002], "DCAY", 1.);
1350     gMC->Gstpar(idtmed[3002], "DRAY", 1.);  
1351     gMC->Gstpar(idtmed[3002], "CUTGAM",0.5E-4) ; 
1352     gMC->Gstpar(idtmed[3002], "CUTELE",1.0E-4) ;
1353     
1354     gMC->Gstpar(idtmed[3003], "LOSS", 1.);  //  [3003] = normal aluminum
1355     gMC->Gstpar(idtmed[3003], "HADR", 1.);
1356     gMC->Gstpar(idtmed[3003], "DCAY", 1.);
1357     gMC->Gstpar(idtmed[3003], "DRAY", 1.);
1358     
1359     gMC->Gstpar(idtmed[3004], "LOSS", 1.);  //  [3004] = reflecting aluminum
1360     gMC->Gstpar(idtmed[3004], "HADR", 1.);
1361     gMC->Gstpar(idtmed[3004], "DCAY", 1.);
1362     gMC->Gstpar(idtmed[3004], "DRAY", 1.);
1363     gMC->Gstpar(idtmed[3004], "CUTGAM",0.5E-4) ; 
1364     gMC->Gstpar(idtmed[3004], "CUTELE",1.0E-4) ;
1365     
1366     gMC->Gstpar(idtmed[3005], "LOSS", 1.);  //  [3005] = scintillator
1367     gMC->Gstpar(idtmed[3005], "HADR", 1.);
1368     gMC->Gstpar(idtmed[3005], "DCAY", 1.);
1369     gMC->Gstpar(idtmed[3005], "DRAY", 1.);    
1370     
1371     gMC->SetCerenkov(idtmed[3002], 14, ppckov, absco_quarz, effic_all,rindex_quarz);    
1372     gMC->SetCerenkov(idtmed[3004], 14, ppckov_alu, absco_alu, effic_alu, rindex_alu);
1373
1374     
1375 }
1376 //---------------------------------------------------------------------
1377 void AliVZEROv0::DrawModule()
1378 {
1379
1380 //  Drawing is done in DrawVZERO.C
1381
1382    Int_t i;
1383
1384    printf("\n");
1385    for(i=0;i<30;i++) printf("*");
1386    printf(" VZERO DrawModule ");
1387    for(i=0;i<30;i++) printf("*");
1388    printf("\n");
1389
1390
1391 }
1392
1393 //-------------------------------------------------------------------
1394 void AliVZEROv0::Init()
1395 {
1396 // Initialises version 0 of the VZERO Detector
1397 // Just prints an information message
1398   
1399    printf(" VZERO version %d initialized \n",IsVersion());
1400    
1401 //   gMC->SetMaxStep(fMaxStepAlu);
1402 //   gMC->SetMaxStep(fMaxStepQua);
1403    
1404 //   AliVZERO::Init();
1405   
1406 }
1407
1408 //-------------------------------------------------------------------
1409
1410 void AliVZEROv0::StepManager()
1411 {
1412   
1413 //   (Very)Minimal version of StepManager 
1414
1415     
1416      Int_t  copy;
1417      static Int_t vol[4];
1418      static Float_t hits[15];
1419      
1420      TLorentzVector pos;
1421      
1422      TLorentzVector mom;
1423      Float_t        theta;
1424      Float_t        phi;
1425      Float_t        kRaddeg = 180/TMath::Pi();
1426      Float_t        RingNumber;
1427
1428      Int_t ipart;
1429      
1430           
1431 //     TGeant3 *geant3 = (TGeant3*) gMC;     
1432 //     Int_t  Nphot = geant3->Gckin2()->ngphot;
1433      
1434
1435 //   Only charged tracks :
1436      
1437      if ( !gMC->TrackCharge() || !gMC->IsTrackAlive() ) return; 
1438
1439
1440      vol[0]    = gMC->CurrentVolOffID(1, vol[1]);
1441      vol[2]    = gMC->CurrentVolID(copy);
1442      vol[3]    = copy;
1443
1444      if      ( gMC->CurrentVolID(copy) == gMC->VolId("V0R1") ||
1445                gMC->CurrentVolID(copy) == gMC->VolId("V0L1") )
1446                RingNumber = 1.0;
1447      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R2") ||
1448                gMC->CurrentVolID(copy) == gMC->VolId("V0L2") ) 
1449                RingNumber = 2.0;  
1450      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R3") ||
1451                gMC->CurrentVolID(copy) == gMC->VolId("V0L3") )
1452                RingNumber = 3.0;
1453      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R4") ||
1454                gMC->CurrentVolID(copy) == gMC->VolId("V0L4") )   
1455                RingNumber = 4.0; 
1456      else if ( gMC->CurrentVolID(copy) == gMC->VolId("V0R5") ||
1457                gMC->CurrentVolID(copy) == gMC->VolId("V0L5") )    
1458                RingNumber = 5.0; 
1459      else
1460                RingNumber = 0.0;
1461
1462      if (gMC->IsTrackEntering() && RingNumber > 0.5) {
1463        
1464          gMC->TrackPosition(pos);
1465      
1466          gMC->TrackMomentum(mom);      
1467          Double_t tc   = mom[0]*mom[0]+mom[1]*mom[1];
1468          Double_t Pt   = TMath::Sqrt(tc);
1469          Double_t Pmom = TMath::Sqrt(tc+mom[2]*mom[2]);
1470
1471          theta   = Float_t(TMath::ATan2(Pt,Double_t(mom[2])))*kRaddeg;
1472          phi     = Float_t(TMath::ATan2(Double_t(mom[1]),Double_t(mom[0])))*kRaddeg;
1473      
1474          ipart  = gMC->TrackPid();
1475
1476          hits[0]  = pos[0];
1477          hits[1]  = pos[1];
1478          hits[2]  = pos[2];              
1479          hits[3]  =  ipart; 
1480          
1481 //         Float_t ttime = gMC->TrackTime();
1482 //         hits[4] = ttime*1e9;
1483
1484          hits[4]  = gMC->TrackTime();
1485          hits[5]  = gMC->TrackCharge();
1486          hits[6]  = theta;
1487          hits[7]  = phi;
1488          hits[8]  = RingNumber;
1489          
1490          hits[9]  = Pt;
1491          hits[10] = Pmom;
1492          hits[11] = mom[0];
1493          hits[12] = mom[1];
1494          hits[13] = mom[2];
1495          
1496
1497          AddHit(gAlice->CurrentTrack(), vol, hits);
1498          
1499          }
1500      
1501 }
1502
1503 //_____________________________________________________________________________
1504 void AliVZEROv0::AddHit(Int_t track, Int_t *vol, Float_t *hits)
1505 {
1506   //
1507   // Add a VZERO hit
1508   //
1509
1510   TClonesArray &lhits = *fHits;
1511   new(lhits[fNhits++]) AliVZEROhit(fIshunt,track,vol,hits);
1512 }
1513
1514 //---------------------------------------------------------------------
1515 void AliVZEROv0::AddDigits(Int_t *tracks, Int_t* digits) 
1516 {
1517
1518    TClonesArray  &ldigits = *fDigits;
1519    new(ldigits[fNdigits++]) AliVZEROdigit(tracks, digits);
1520 }
1521
1522 //---------------------------------------------------------------------
1523 void AliVZEROv0::MakeBranch(Option_t *option)
1524 {
1525   
1526   // Creates new branches in the current Root Tree
1527   
1528   
1529   char branchname[10];
1530   sprintf(branchname,"%s",GetName());
1531   printf(" fBufferSize = %d \n",fBufferSize);
1532   
1533   char *H = strstr(option,"H");
1534   
1535   if (fHits   && gAlice->TreeH() && H) {
1536     gAlice->TreeH()->Branch(branchname,&fHits, fBufferSize);
1537     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
1538   }     
1539
1540   char *D = strstr(option,"D");
1541   //
1542   if (fDigits   && gAlice->TreeD() && D) {
1543     gAlice->TreeD()->Branch(branchname,&fDigits, fBufferSize);
1544     printf("* AliDetector::MakeBranch * Making Branch %s for digits\n",branchname);
1545   }  
1546    
1547 }