New coordinate system
[u/mrichter/AliRoot.git] / VZERO / AliVZEROv0.cxx
1 /**************************************************************************
2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3  *                                                                        *
4  * Author: The ALICE Off-line Project.                                    *
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15
16 /* $Id$ */
17
18 //////////////////////////////////////////////////////////////////////
19 //                                                                  //
20 //  (V-zero) detector  version 0  as designed by the Lyon group     //
21 //   All comments should be sent to Brigitte CHEYNIS :              //
22 //                                  b.cheynis@ipnl.in2p3.fr         // 
23 //   Geometrie      du 25/02/2002                                   //
24 //                                                                  //
25 //////////////////////////////////////////////////////////////////////
26
27 #include <stdlib.h>
28 #include <string.h>
29 #include <Riostream.h>
30
31 #include <TBRIK.h>
32 #include <TBox.h>
33 #include <TCONE.h>
34 #include <TClonesArray.h>
35 #include <TGeometry.h>
36 #include <TH1.h>
37 #include <TLorentzVector.h>
38 #include <TMath.h>
39 #include <TNode.h>
40 #include <TObjectTable.h>
41 #include <TPCON.h>
42 #include <TPGON.h>
43 #include <TSPHE.h>
44 #include <TShape.h>
45 #include <TTRAP.h>
46 #include <TTRD2.h>
47 #include <TVirtualMC.h>
48
49 #include "ABSOConst.h"
50 #include "ABSOSHILConst.h"
51 #include "AliMagF.h"
52 #include "AliRun.h"
53 #include "AliVZEROdigit.h"
54 #include "AliVZEROhit.h"
55 #include "AliVZEROv0.h"
56 #include "AliMC.h"
57
58 ClassImp(AliVZEROv0)
59
60 //--------------------------------------------------------------------
61 AliVZEROv0:: AliVZEROv0():AliVZERO()
62 {
63
64
65 }
66 //--------------------------------------------------------------------
67 AliVZEROv0::AliVZEROv0(const char *name, const char *title):
68  AliVZERO(name,title)
69 {
70
71 // Standard constructor for V-zeroR Detector (right part)  version 0
72
73
74   Int_t i;
75
76   printf("\n");
77   for(i=0;i<30;i++) printf("*");
78   printf(" Create VZERO object ");
79   for(i=0;i<30;i++) printf("*");
80   printf("\n");
81   
82 }
83
84 //-------------------------------------------------------------------------
85 void AliVZEROv0::CreateGeometry()
86 {
87
88 // Creates the Geant geometry of the V-zero Detector  version 0
89
90   
91   Int_t i;
92   
93   printf("\n");
94   for(i=0;i<30;i++) printf("*");
95   printf(" Create VZERO Geometry ");
96   for(i=0;i<30;i++) printf("*");
97   printf("\n");
98     
99   
100   Int_t    *idtmed = fIdtmed->GetArray()-2999;
101
102   Int_t    n_detec_R = 1;
103   Int_t    n_detec_L = 1;
104  
105   Int_t    n_cells_R = 1;
106   Int_t    n_cells_L = 1;
107   
108   Int_t    idrotm[999];
109  
110   Float_t  height1, height2, height3, height4, height5; 
111   Float_t  height;
112   Float_t  theta;  
113   Float_t  half_thick_alu;
114   Float_t  half_thick_qua1,half_thick_qua2,half_thick_qua3;
115   Float_t  half_thick_qua4,half_thick_qua5;
116   Float_t  zdet;
117   Float_t  r0, r5;
118   Float_t  pi = TMath::Pi();
119   Float_t  thick_alu;
120   
121   height1           =     2.0;           // height of cell 1, in cm
122   height2           =     3.2;           // height of cell 2, in cm
123   height3           =     4.9;           // height of cell 3, in cm
124   height4           =     7.5;           // height of cell 4, in cm
125   height5           =    12.0;           // height of cell 5, in cm
126   
127   theta             = pi/6.0/2.0;       // half angular opening = 15 degrees
128   half_thick_alu    = 0.0025;            // half thickness of aluminum foil, in cm
129   thick_alu         = 2.0 * half_thick_alu; 
130   fThickness1       = 2.5;
131   half_thick_qua1   = fThickness1/2.0;   // half thickness of WRAPPED quartz cell (inner ring)
132   half_thick_qua2   = half_thick_qua1  - 0.25;
133   half_thick_qua3   = half_thick_qua2  - 0.25;
134   half_thick_qua4   = half_thick_qua3  - 0.25;
135   half_thick_qua5   = half_thick_qua4  - 0.25;
136   
137   zdet              =    86.9 +fThickness/2.0;  // distance to vertex (along Z axis)
138   r0                =    4.0;            // closest distance to center of the beam pipe
139   height            =    height1 + height2 + height3 + height4 + height5;
140   r5                =    r0 + height;
141
142 //............................................................................
143
144 // Here I add the flange which is sitting on beam line 
145 // right in front of V0R detector, and which I found on CERN drawing 
146 // entitled : ALICE BEAM VACCUM CHAMBER - RB26 version III :  
147    
148 //     Float_t   pflange[3];
149 //     
150 //     pflange[0] = 3.0;
151 //     pflange[1] = 5.675;
152 //     pflange[2] = 0.9;        
153 // 
154 //     gMC->Gsvolu("QFA0","TUBE", idtmed[3003], pflange, 3);
155 //     gMC->Gspos("QFA0", 1 ,"ALIC", 0.0, 0.0, 85.0+0.9, 0, "ONLY");
156      
157 //............................................................................
158
159
160 // Creation of mother volume V0LE - left part - :
161 // Face entree a -350.0 cm ...
162
163    Float_t   partube[3];
164    
165    partube[0] =  4.3;
166    partube[1] = 45.0;
167    partube[2] = fThickness1/2.0;   
168     
169    gMC->Gsvolu("V0LE","TUBE",idtmed[3002],partube,3);
170   
171    
172 // Creation of five rings - left part - :
173 // Face entree a -350.0 cm ... 
174
175 // Mother volume V0L0 in which will be set 5 quartz cells 
176
177
178   Float_t   par[11];
179   
180   Float_t   dist0_left;   
181   Float_t   r0_left      =   4.3;   
182   Float_t   height1_left =   2.6; 
183   Float_t   height2_left =   4.1;
184   Float_t   height3_left =   6.4;
185   Float_t   height4_left =  10.2;
186   Float_t   height5_left =  16.9;
187   Float_t   height_left  = height1_left + height2_left + height3_left 
188                                         + height4_left + height5_left;
189   Float_t   r5_left      = r0_left  + height_left; 
190   
191    
192   dist0_left  =  r0_left + height_left / 2.0;
193   thick_alu   =  2.0*half_thick_alu;
194   
195   par[0]      =  half_thick_qua1;
196   par[1]      =  0.0;
197   par[2]      =  0.0;
198   par[3]      =  height_left / 2.0 ;
199   par[4]      =  TMath::Tan(theta) * r0_left;
200   par[5]      =  TMath::Tan(theta) * r5_left;
201   par[6]      =  0.0;
202   par[7]      =  height_left / 2.0 ;
203   par[8]      =  TMath::Tan(theta) * r0_left;
204   par[9]      =  TMath::Tan(theta) * r5_left;
205   par[10]     =  0.0;
206   
207
208   gMC->Gsvolu("V0L0","TRAP",idtmed[3010],par,11);  // air volume
209   
210   Float_t   dist1_left;
211   Float_t   r1_left;
212   Float_t   offset_left;
213      
214   dist1_left     =  (- height_left + height1_left) /2.0; 
215   r1_left        =  r0_left + height1_left;
216   offset_left    = - fThickness1/2.0 + 0.1; 
217    
218   par[0]    =  half_thick_qua1 - thick_alu;
219   par[3]    =  height1_left / 2.0 - thick_alu;
220   par[4]    =  TMath::Tan(theta) * r0_left - thick_alu;
221   par[5]    =  TMath::Tan(theta) * r1_left- thick_alu;
222   par[7]    =  height1_left / 2.0 - thick_alu;
223   par[8]    =  TMath::Tan(theta) * r0_left - thick_alu;
224   par[9]    =  TMath::Tan(theta) * r1_left - thick_alu;
225
226
227   gMC->Gsvolu("V0L1","TRAP",idtmed[3002],par,11);  // quartz volume
228   gMC->Gspos("V0L1",1,"V0L0", 0.0, dist1_left , 0.0, 0,"ONLY"); 
229   
230   Float_t   dist2_left;
231   Float_t   r2_left; 
232     
233   dist2_left     =    (- height_left + height2_left) /2.0 + height1_left;
234   r2_left        =       r1_left + height2_left; 
235   
236   par[0]    =  half_thick_qua1 - thick_alu;   
237   par[3]    =  height2_left / 2.0 - thick_alu;
238   par[4]    =  TMath::Tan(theta) * r1_left - thick_alu;
239   par[5]    =  TMath::Tan(theta) * r2_left - thick_alu;
240   par[7]    =  height2_left / 2.0 - thick_alu;
241   par[8]    =  TMath::Tan(theta) * r1_left - thick_alu;
242   par[9]    =  TMath::Tan(theta) * r2_left - thick_alu;
243
244   gMC->Gsvolu("V0L2","TRAP",idtmed[3002],par,11);  // quartz volume
245   gMC->Gspos("V0L2",1,"V0L0", 0.0, dist2_left , 0.0, 0,"ONLY"); 
246   
247   
248   Float_t   dist3_left;
249   Float_t   r3_left;
250      
251   dist3_left     =    (- height_left + height3_left) /2.0 + height1_left + height2_left;
252   r3_left        =       r2_left + height3_left; 
253    
254   par[0]    =  half_thick_qua1 - thick_alu;   
255   par[3]    =  height3_left / 2.0 - thick_alu;
256   par[4]    =  TMath::Tan(theta) * r2_left - thick_alu;
257   par[5]    =  TMath::Tan(theta) * r3_left - thick_alu;
258   par[7]    =  height3_left / 2.0 - thick_alu;
259   par[8]    =  TMath::Tan(theta) * r2_left - thick_alu;
260   par[9]    =  TMath::Tan(theta) * r3_left - thick_alu;
261
262   gMC->Gsvolu("V0L3","TRAP",idtmed[3002],par,11);  // quartz volume
263   gMC->Gspos("V0L3",1,"V0L0", 0.0, dist3_left , 0.0, 0,"ONLY");
264     
265   Float_t   dist4_left;
266   Float_t   r4_left;
267        
268   dist4_left     =    (- height_left + height4_left) /2.0 + height1_left 
269                                      + height2_left + height3_left;
270   r4_left        =       r3_left + height4_left; 
271    
272   par[0]    =  half_thick_qua1 - thick_alu;   
273   par[3]    =  height4_left / 2.0 - thick_alu;
274   par[4]    =  TMath::Tan(theta) * r3_left - thick_alu;
275   par[5]    =  TMath::Tan(theta) * r4_left - thick_alu;
276   par[7]    =  height4_left / 2.0 - thick_alu;
277   par[8]    =  TMath::Tan(theta) * r3_left - thick_alu;
278   par[9]    =  TMath::Tan(theta) * r4_left - thick_alu;
279
280   gMC->Gsvolu("V0L4","TRAP",idtmed[3002],par,11);  // quartz volume
281   gMC->Gspos("V0L4",1,"V0L0", 0.0, dist4_left , 0.0, 0,"ONLY");
282
283
284   Float_t   dist5_left;
285
286          
287   dist5_left     =    (- height_left + height5_left) /2.0 + height1_left 
288                                      + height2_left + height3_left + height4_left;
289
290    
291   par[0]    =  half_thick_qua1 - thick_alu;   
292   par[3]    =  height5_left / 2.0 - thick_alu;
293   par[4]    =  TMath::Tan(theta) * r4_left - thick_alu;
294   par[5]    =  TMath::Tan(theta) * r5_left - thick_alu;
295   par[7]    =  height5_left / 2.0 - thick_alu;
296   par[8]    =  TMath::Tan(theta) * r4_left - thick_alu;
297   par[9]    =  TMath::Tan(theta) * r5_left - thick_alu;
298
299   gMC->Gsvolu("V0L5","TRAP",idtmed[3002],par,11);  // quartz volume
300   gMC->Gspos("V0L5",1,"V0L0", 0.0, dist5_left , 0.0, 0,"ONLY");
301   
302   
303 //............................................................................
304
305 // Creation of mother volume V0RI - right part - :
306
307   
308   partube[0] = r0 - 0.2;
309   partube[1] = (r5 + 1.0) / TMath::Cos(theta);
310   partube[2] = fThickness/2.0; 
311   
312     
313   gMC->Gsvolu("V0RI","TUBE",idtmed[3010],partube,3);
314   
315 // Creation of  carbon lids (1 mm thick) to keep V0RI box shut...
316
317   Float_t   parbox[10];
318   
319   parbox[0] =    0.;
320   parbox[1] =  360.;
321   parbox[2] =    12;
322   parbox[3] =     2;
323   parbox[4] =  -0.1/2.0;
324   parbox[5] =  r0;
325   parbox[6] =  r5;     
326   parbox[7] =  +0.1/2.0;
327   parbox[8] =  r0;
328   parbox[9] =  r5;  
329   
330   
331   gMC->Gsvolu("V0CA","PGON",idtmed[3001],parbox,10); 
332   gMC->Gspos("V0CA",1,"V0RI",0.0,0.0, fThickness/2.0-parbox[7],0,"ONLY");
333   gMC->Gspos("V0CA",2,"V0RI",0.0,0.0,-fThickness/2.0+parbox[7],0,"ONLY");
334   
335 // Creation of aluminum rings to maintain the V0RI pieces ...
336
337   parbox[4] =  -fThickness/2.0;
338   parbox[5] =  r0 -0.2;
339   parbox[6] =  r0;     
340   parbox[7] =  +fThickness/2.0;
341   parbox[8] =  r0 -0.2;
342   parbox[9] =  r0; 
343   
344   gMC->Gsvolu("V0IR","PGON",idtmed[3003],parbox,10);    
345   gMC->Gspos("V0IR",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
346   
347   parbox[4] =  -fThickness/2.0;
348   parbox[5] =  r5;
349   parbox[6] =  r5 + 1.0;     
350   parbox[7] =  +fThickness/2.0;
351   parbox[8] =  r5;
352   parbox[9] =  r5 + 1.0; 
353  
354   gMC->Gsvolu("V0ER","PGON",idtmed[3003],parbox,10);    
355   gMC->Gspos("V0ER",1,"V0RI",0.0,0.0,0.0,0,"ONLY");
356   
357 // Mother volume V0R0 in which will be set 5  quartz cells 
358 // each one  WRAPPED in reflecting aluminum : 
359   
360   Float_t   dist0;   
361     
362   dist0     =  r0 + height / 2.0;
363   thick_alu =  2.0*half_thick_alu;
364   
365   par[0]    =  half_thick_qua1;
366   par[1]    =  0.0;
367   par[2]    =  0.0;
368   par[3]    =  height / 2.0 ;
369   par[4]    =  TMath::Tan(theta) * r0;
370   par[5]    =  TMath::Tan(theta) * r5;
371   par[6]    =  0.0;
372   par[7]    =  height / 2.0 ;
373   par[8]    =  TMath::Tan(theta) * r0;
374   par[9]    =  TMath::Tan(theta) * r5;
375   par[10]   =  0.0;
376
377
378   gMC->Gsvolu("V0R0","TRAP",idtmed[3010],par,11);  // air volume
379
380 // Elementary cell of ring 1 :
381  
382   Float_t   dist1;
383   Float_t   r1;
384   Float_t   offset;
385      
386   dist1     =  (- height + height1) /2.0; 
387   r1        =  r0 + height1;
388   offset    = - fThickness/2.0 + 0.1; 
389    
390   par[0]    =  half_thick_qua1 - thick_alu;
391   par[3]    =  height1 / 2.0 - thick_alu;
392   par[4]    =  TMath::Tan(theta) * r0 - thick_alu;
393   par[5]    =  TMath::Tan(theta) * r1- thick_alu;
394   par[7]    =  height1 / 2.0 - thick_alu;
395   par[8]    =  TMath::Tan(theta) * r0 - thick_alu;
396   par[9]    =  TMath::Tan(theta) * r1 - thick_alu;
397
398
399   gMC->Gsvolu("V0R1","TRAP",idtmed[3002],par,11);  // quartz volume
400   gMC->Gspos("V0R1",1,"V0R0", 0.0, dist1 , 0.0, 0,"ONLY");
401   
402   par[0]    =  half_thick_alu;
403
404   gMC->Gsvolu("V0A1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
405   gMC->Gspos("V0A1",1,"V0R1",0.0,0.0, - half_thick_qua1 + half_thick_alu,0,"ONLY");  
406   gMC->Gspos("V0A1",2,"V0R1",0.0,0.0, + half_thick_qua1 - half_thick_alu,0,"ONLY");  
407
408   parbox[0] = half_thick_alu;
409   parbox[1] = height1 / TMath::Cos(theta)/ 2.0;
410   parbox[2] = half_thick_qua1;
411   
412   gMC->Gsvolu("V0A2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
413   Float_t  theta_deg = 180./6./2.0; 
414   Float_t h1;
415   h1 = TMath::Tan(theta) * (r0 + height1/2.0);  
416   AliMatrix(idrotm[911],90.0,+theta_deg,90.0,90.+theta_deg,0.0,0.);  
417   gMC->Gspos("V0A2",1,"V0R1",-h1 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY"); 
418   AliMatrix(idrotm[912],90.0,-theta_deg,90.0,90.-theta_deg,0.0,0.);  
419   gMC->Gspos("V0A2",2,"V0R1",+h1 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY"); 
420
421   parbox[0] = TMath::Tan(theta) * r0;
422   parbox[1] = half_thick_alu;
423   parbox[2] = half_thick_qua1;
424   gMC->Gsvolu("V0A3","BOX",idtmed[3004],parbox,3);
425   gMC->Gspos("V0A3",1,"V0R1",0.0, - (height1/2.0) + half_thick_alu ,0.0,0,"ONLY");
426     
427
428   parbox[0] = TMath::Tan(theta) * (r0 + height1);
429   parbox[1] = half_thick_alu;
430   parbox[2] = half_thick_qua1;
431   gMC->Gsvolu("V0A4","BOX",idtmed[3004],parbox,3);
432   gMC->Gspos("V0A4",1,"V0R1",0.0, (height1/2.0) - half_thick_alu,0.0,0,"ONLY");
433
434   
435 //  Elementary cell of ring 2 : 
436  
437   Float_t   dist2;
438   Float_t   r2; 
439     
440   dist2     =    (- height + height2) /2.0 + height1;
441   r2        =       r1 + height2; 
442   
443   par[0]    =  half_thick_qua2 - thick_alu;   
444   par[3]    =  height2 / 2.0 - thick_alu;
445   par[4]    =  TMath::Tan(theta) * r1 - thick_alu;
446   par[5]    =  TMath::Tan(theta) * r2 - thick_alu;
447   par[7]    =  height2 / 2.0 - thick_alu;
448   par[8]    =  TMath::Tan(theta) * r1 - thick_alu;
449   par[9]    =  TMath::Tan(theta) * r2 - thick_alu;
450
451   gMC->Gsvolu("V0R2","TRAP",idtmed[3002],par,11);  // quartz volume
452   gMC->Gspos("V0R2",1,"V0R0", 0.0, dist2 , - half_thick_qua1 + half_thick_qua2, 0,"ONLY");
453
454   par[0]    =  half_thick_alu;
455
456   gMC->Gsvolu("V0B1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
457   gMC->Gspos("V0B1",1,"V0R2",0.0,0.0, - half_thick_qua2 + half_thick_alu,0,"ONLY");  
458   gMC->Gspos("V0B1",2,"V0R2",0.0,0.0, + half_thick_qua2 - half_thick_alu,0,"ONLY");  
459
460   parbox[0] = half_thick_alu;
461   parbox[1] = height2 / TMath::Cos(theta)/ 2.0;
462   parbox[2] = half_thick_qua2;
463   
464   gMC->Gsvolu("V0B2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
465   Float_t h2;
466   h2 = TMath::Tan(theta) * (r0  + height1 + height2/2.0);  
467   gMC->Gspos("V0B2",1,"V0R2",-h2 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY"); 
468   gMC->Gspos("V0B2",2,"V0R2",+h2 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY"); 
469
470   parbox[0] = TMath::Tan(theta) * (r0 + height1);
471   parbox[1] = half_thick_alu;
472   parbox[2] = half_thick_qua2;
473   gMC->Gsvolu("V0B3","BOX",idtmed[3004],parbox,3);
474   gMC->Gspos("V0B3",1,"V0R2",0.0, - (height2/2.0) + half_thick_alu ,0.0,0,"ONLY");
475     
476
477   parbox[0] = TMath::Tan(theta) * (r0 + height1 +  height2);
478   parbox[1] = half_thick_alu;
479   parbox[2] = half_thick_qua2;
480   gMC->Gsvolu("V0B4","BOX",idtmed[3004],parbox,3);
481   gMC->Gspos("V0B4",1,"V0R2",0.0, (height2/2.0) - half_thick_alu,0.0,0,"ONLY");
482   
483
484 // Elementary cell  ring 3 :   
485   
486   Float_t   dist3;
487   Float_t   r3; 
488     
489   dist3     =    (- height + height3) /2.0 + height1 + height2;
490   r3        =       r2 + height3; 
491    
492   par[0]    =  half_thick_qua3 - thick_alu;   
493   par[3]    =  height3 / 2.0 - thick_alu;
494   par[4]    =  TMath::Tan(theta) * r2 - thick_alu;
495   par[5]    =  TMath::Tan(theta) * r3 - thick_alu;
496   par[7]    =  height3 / 2.0 - thick_alu;
497   par[8]    =  TMath::Tan(theta) * r2 - thick_alu;
498   par[9]    =  TMath::Tan(theta) * r3 - thick_alu;
499
500   gMC->Gsvolu("V0R3","TRAP",idtmed[3002],par,11);  // quartz volume
501   gMC->Gspos("V0R3",1,"V0R0", 0.0, dist3 , - half_thick_qua1 +  half_thick_qua3, 0,"ONLY");
502
503
504   par[0]    =  half_thick_alu;
505
506   gMC->Gsvolu("V0C1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
507   gMC->Gspos("V0C1",1,"V0R3",0.0,0.0, - half_thick_qua3 + half_thick_alu,0,"ONLY");  
508   gMC->Gspos("V0C1",2,"V0R3",0.0,0.0, + half_thick_qua3 - half_thick_alu,0,"ONLY");  
509
510   parbox[0] = half_thick_alu;
511   parbox[1] = height3 / TMath::Cos(theta)/ 2.0;
512   parbox[2] = half_thick_qua3;
513   
514   gMC->Gsvolu("V0C2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
515   Float_t h3;
516   h3 = TMath::Tan(theta) * (r0  + height1 + height2 + height3/2.0);  
517   gMC->Gspos("V0C2",1,"V0R3",-h3 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY"); 
518   gMC->Gspos("V0C2",2,"V0R3",+h3 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY"); 
519
520   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2);
521   parbox[1] = half_thick_alu;
522   parbox[2] = half_thick_qua3;
523   gMC->Gsvolu("V0C3","BOX",idtmed[3004],parbox,3);
524   gMC->Gspos("V0C3",1,"V0R3",0.0, - (height3/2.0) + half_thick_alu ,0.0,0,"ONLY");
525     
526
527   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3);
528   parbox[1] = half_thick_alu;
529   parbox[2] = half_thick_qua3;
530   gMC->Gsvolu("V0C4","BOX",idtmed[3004],parbox,3);
531   gMC->Gspos("V0C4",1,"V0R3",0.0, (height3/2.0) - half_thick_alu,0.0,0,"ONLY");
532
533
534 // Elementary cell  ring 4 :  
535
536   Float_t   dist4;
537   Float_t   r4; 
538     
539   dist4     =    (- height + height4) /2.0 + height1 + height2 + height3;
540   r4        =       r3 + height4; 
541    
542   par[0]    =  half_thick_qua4 - thick_alu;   
543   par[3]    =  height4 / 2.0 - thick_alu;
544   par[4]    =  TMath::Tan(theta) * r3 - thick_alu;
545   par[5]    =  TMath::Tan(theta) * r4 - thick_alu;
546   par[7]    =  height4 / 2.0 - thick_alu;
547   par[8]    =  TMath::Tan(theta) * r3 - thick_alu;
548   par[9]    =  TMath::Tan(theta) * r4 - thick_alu;
549
550   gMC->Gsvolu("V0R4","TRAP",idtmed[3002],par,11);  // quartz volume
551   gMC->Gspos("V0R4",1,"V0R0", 0.0, dist4 , - half_thick_qua1 + half_thick_qua4, 0,"ONLY"); 
552
553
554   par[0]    =  half_thick_alu;
555
556   gMC->Gsvolu("V0D1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
557   gMC->Gspos("V0D1",1,"V0R4",0.0,0.0, - half_thick_qua4 + half_thick_alu,0,"ONLY");  
558   gMC->Gspos("V0D1",2,"V0R4",0.0,0.0, + half_thick_qua4 - half_thick_alu,0,"ONLY");  
559
560   parbox[0] = half_thick_alu;
561   parbox[1] = height4 / TMath::Cos(theta)/ 2.0;
562   parbox[2] = half_thick_qua4;
563   
564   gMC->Gsvolu("V0D2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
565   Float_t h4;
566   h4 = TMath::Tan(theta) * (r0  + height1 + height2 + height3 + height4/2.0);  
567   gMC->Gspos("V0D2",1,"V0R4",-h4 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY"); 
568   gMC->Gspos("V0D2",2,"V0R4",+h4 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY"); 
569
570   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3);
571   parbox[1] = half_thick_alu;
572   parbox[2] = half_thick_qua4;
573   gMC->Gsvolu("V0D3","BOX",idtmed[3004],parbox,3);
574   gMC->Gspos("V0D3",1,"V0R4",0.0, - (height4/2.0) + half_thick_alu ,0.0,0,"ONLY");
575     
576
577   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3 + height4);
578   parbox[1] = half_thick_alu;
579   parbox[2] = half_thick_qua4;
580   gMC->Gsvolu("V0D4","BOX",idtmed[3004],parbox,3);
581   gMC->Gspos("V0D4",1,"V0R4",0.0, (height4/2.0) - half_thick_alu,0.0,0,"ONLY");
582
583
584 // Elementary cell  ring 5 :  
585
586   Float_t   dist5;
587       
588   dist5     =    (- height + height5) /2.0 + height1 + height2 + height3 + height4;
589   
590   par[0]    =  half_thick_qua5 - thick_alu;      
591   par[3]    =  height5 / 2.0 - thick_alu;
592   par[4]    =  TMath::Tan(theta) * r4 - thick_alu;
593   par[5]    =  TMath::Tan(theta) * r5 - thick_alu;
594   par[7]    =  height5 / 2.0 - thick_alu;
595   par[8]    =  TMath::Tan(theta) * r4 - thick_alu;
596   par[9]    =  TMath::Tan(theta) * r5 - thick_alu;
597
598   gMC->Gsvolu("V0R5","TRAP",idtmed[3002],par,11);  // quartz volume
599   gMC->Gspos("V0R5",1,"V0R0", 0.0, dist5 , - half_thick_qua1 +  half_thick_qua5, 0,"ONLY"); 
600
601
602   par[0]    =  half_thick_alu;
603
604   gMC->Gsvolu("V0E1","TRAP",idtmed[3004],par,11);  // aluminum trap-shaped foil
605   gMC->Gspos("V0E1",1,"V0R5",0.0,0.0, - half_thick_qua5 + half_thick_alu,0,"ONLY");  
606   gMC->Gspos("V0E1",2,"V0R5",0.0,0.0, + half_thick_qua5 - half_thick_alu,0,"ONLY");  
607
608   parbox[0] = half_thick_alu;
609   parbox[1] = height5 / TMath::Cos(theta)/ 2.0;
610   parbox[2] = half_thick_qua5;
611   
612   gMC->Gsvolu("V0E2","BOX",idtmed[3004],parbox,3);   // aluminum rectangular foil
613   Float_t h5;
614   h5 = TMath::Tan(theta) * (r0  + height1 + height2 + height3 + height4 + height5/2.0);  
615   gMC->Gspos("V0E2",1,"V0R5",-h5 + half_thick_alu,0.0,0.0,idrotm[911],"ONLY"); 
616   gMC->Gspos("V0E2",2,"V0R5",+h5 - half_thick_alu,0.0,0.0,idrotm[912],"ONLY"); 
617
618   parbox[0] = TMath::Tan(theta) * (r0 + height1 + height2 + height3 + height4);
619   parbox[1] = half_thick_alu;
620   parbox[2] = half_thick_qua5;
621   gMC->Gsvolu("V0E3","BOX",idtmed[3004],parbox,3);
622   gMC->Gspos("V0E3",1,"V0R5",0.0, - (height5/2.0) + half_thick_alu ,0.0,0,"ONLY");
623     
624
625   parbox[0] = TMath::Tan(theta) * r5;
626   parbox[1] = half_thick_alu;
627   parbox[2] = half_thick_qua5;
628   gMC->Gsvolu("V0E4","BOX",idtmed[3004],parbox,3);
629   gMC->Gspos("V0E4",1,"V0R5",0.0, (height5/2.0) - half_thick_alu,0.0,0,"ONLY");
630
631
632   Float_t  phi_rad ;  
633   Float_t  phi_deg = 180./6.; 
634
635  // Partie de droite : 
636  
637   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phi_deg)
638       {
639         phi_rad = phi*pi/180.;
640         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
641         gMC->Gspos("V0R0",n_detec_R,"V0RI",-dist0*TMath::Sin(phi_rad),
642                           dist0*TMath::Cos(phi_rad),offset + half_thick_qua1,idrotm[902],"ONLY");
643         n_detec_R++;
644        }
645
646   gMC->Gspos("V0RI",1,"ALIC",0.0,0.0,zdet,0,"ONLY");
647  
648   n_cells_R = (n_detec_R - 1) * 5;
649   printf(" \n\n\n"); 
650   printf("    Number of cells on Right side =   %d\n",  n_cells_R);    
651
652 // Partie de gauche :
653
654   for(Float_t  phi = 15.0; phi < 360.0; phi = phi + phi_deg)
655       {
656         phi_rad = phi*pi/180.;
657         AliMatrix(idrotm[902], 90.0, phi, 90.0, 90.0 +phi, 0.0 , 0.0);
658         gMC->Gspos("V0L0",n_detec_L,"V0LE",-dist0_left*TMath::Sin(phi_rad),
659                           dist0_left*TMath::Cos(phi_rad),offset_left + half_thick_qua1,idrotm[902],"ONLY");
660         n_detec_L++;
661        }
662
663
664   gMC->Gspos("V0LE",1,"ALIC",0.0,0.0,-350.0-fThickness1/2.0,0,"ONLY");
665  
666   n_cells_L = (n_detec_L - 1) * 5;
667   printf(" \n\n\n"); 
668   printf("    Number of cells on Left side  =   %d\n\n",  n_cells_L);    
669
670          
671 }
672     
673     
674     
675 //_____________________________________________________________________________
676 void AliVZEROv0::BuildGeometry()
677 {
678   
679   // Builds simple ROOT TNode geometry for event display
680
681   
682   Int_t i;
683
684   printf("\n");
685   for(i=0;i<30;i++) printf("*");
686   printf(" VZERO BuildGeometry ");
687   for(i=0;i<30;i++) printf("*");
688   printf("\n");
689   
690   TNode *Top; 
691
692   TNode *V0Rnode, *V0Rnode0, *V0Rnode6 , *V0Rnode7, *V0Rnode8, *V0Rnode9;
693   TNode *V0Rnode1, *V0Rnode2, *V0Rnode3, *V0Rnode4, *V0Rnode5;
694   TNode *V0Lnode, *V0Lnode0;
695   TNode *V0Lnode1, *V0Lnode2, *V0Lnode3, *V0Lnode4, *V0Lnode5;
696    
697   const int kColorVZERO  = kGreen;
698  
699   Top = gAlice->GetGeometry()->GetNode("alice");
700
701   Float_t  height1, height2, height3, height4, height5; 
702   Float_t  height;
703   Float_t  theta;  
704   Float_t  half_thick_alu;
705   Float_t  half_thick_qua1,half_thick_qua2,half_thick_qua3;
706   Float_t  half_thick_qua4,half_thick_qua5;
707   Float_t  zdet;
708   Float_t  r0, r5;
709   Float_t  pi = TMath::Pi();
710   Float_t  thick_alu;
711   
712 //   height1           =     1.9;         
713 //   height2           =     3.7; 
714 //   height3           =     6.2;
715 //   height4           =    10.5;
716 //   height5           =    10.5;
717
718   height1           =     2.0;           // height of cell 1, in cm
719   height2           =     3.2;           // height of cell 2, in cm
720   height3           =     4.9;           // height of cell 3, in cm
721   height4           =     7.5;           // height of cell 4, in cm
722   height5           =    12.0;           // height of cell 5, in cm
723   
724   theta             = pi/6.0/2.0;    
725   half_thick_alu    = 0.0025;        
726   thick_alu         = 2.0 * half_thick_alu; 
727   half_thick_qua1   = fThickness1/2.0; 
728   half_thick_qua2   = half_thick_qua1  - 0.25;
729   half_thick_qua3   = half_thick_qua2  - 0.25;
730   half_thick_qua4   = half_thick_qua3  - 0.25;
731   half_thick_qua5   = half_thick_qua4  - 0.25;
732   
733   zdet              =    86.9 +fThickness/2.0;   
734   r0                =    4.0;         
735   height            =    height1 + height2 + height3 + height4 + height5;
736   r5                =    r0 + height;
737
738   Float_t   partube[3];
739
740   partube[0] =  r0 - 0.2;
741   partube[1] = (r5 + 1.0) / TMath::Cos(theta);
742   partube[2] = fThickness/2.0;   
743   
744   TTUBE *V0RI = new TTUBE("V0RI", "V0RI", "void", partube[0], partube[1], partube[2]);
745                 
746   Top->cd();
747   
748   V0Rnode = new TNode("V0RI","V0RI",V0RI,0.0,0.0,+zdet,0);
749   
750   V0Rnode->SetLineColor(kBlue);
751   fNodes->Add(V0Rnode);
752   
753   V0Rnode->SetVisibility(2);
754      
755  
756 // Rondelles de carbone (epaisseur 1 mm) de maintien des cellules ...
757  
758
759   Float_t   parbox[10];
760  
761   parbox[0] =    0.;
762   parbox[1] =  360.;
763   parbox[2] =   12.;
764   parbox[3] =    2.;
765   parbox[4] =  -0.1/2.0;
766   parbox[5] =  r0;
767   parbox[6] =  r5;     
768   parbox[7] =  +0.1/2.0;
769   parbox[8] =  r0;
770   parbox[9] =  r5;  
771   
772   
773   TPGON *V0CA = new TPGON("V0CA", "V0CA", "void",parbox[0], parbox[1],
774                           static_cast<Int_t>(parbox[2]),
775                           static_cast<Int_t>(parbox[3]));
776                             
777   V0CA->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
778   V0CA->DefineSection( 1, parbox[7], parbox[8], parbox[9] ); 
779    
780   V0Rnode->cd();
781   V0Rnode6 = new TNode("V0CA", "V0CA",V0CA,0.0,0.0, fThickness/2.0-parbox[7],0);         
782   V0Rnode6->SetLineColor(kYellow);
783   fNodes->Add(V0Rnode6); 
784   V0Rnode->cd();
785   V0Rnode7 = new TNode("V0CA", "V0CA",V0CA,0.0,0.0,-fThickness/2.0+parbox[7],0);         
786   V0Rnode7->SetLineColor(kYellow);
787   fNodes->Add(V0Rnode7);
788   
789   parbox[4] =  -fThickness/2.0;
790   parbox[5] =  r0 - 0.2;
791   parbox[6] =  r0;     
792   parbox[7] =  +fThickness/2.0;
793   parbox[8] =  r0 - 0.2;
794   parbox[9] =  r0; 
795
796   TPGON  *V0IR = new TPGON("V0IR","V0IR","void",  parbox[0], parbox[1],
797                           static_cast<Int_t>(parbox[2]),
798                           static_cast<Int_t>(parbox[3]));
799   V0IR->DefineSection( 0, parbox[4], parbox[5], parbox[6] );
800   V0IR->DefineSection( 1, parbox[7], parbox[8], parbox[9] );
801   
802   V0Rnode->cd();
803   V0Rnode8 = new TNode("V0IR", "V0IR",V0IR,0.0,0.0,0.0,0);
804   V0Rnode8->SetLineColor(kYellow);
805   fNodes->Add(V0Rnode8);
806  
807   parbox[4] =  -fThickness/2.0;
808   parbox[5] =  r5;
809   parbox[6] =  r5 + 1.0;     
810   parbox[7] =  +fThickness/2.0;
811   parbox[8] =  r5;
812   parbox[9] =  r5 + 1.0; 
813
814   TPGON  *V0ER = new TPGON("V0ER","V0ER","void",  parbox[0], parbox[1],
815                           static_cast<Int_t>(parbox[2]),
816                           static_cast<Int_t>(parbox[3]));
817
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->GetMCApp()->GetCurrentTrackNumber(), 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   const char *H = strstr(option,"H");
1534   
1535   if (fHits   && TreeH() && H) {
1536     TreeH()->Branch(branchname,&fHits, fBufferSize);
1537     printf("* AliDetector::MakeBranch * Making Branch %s for hits\n",branchname);
1538   }     
1539
1540   const 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 }