geometry without overlaps
[u/mrichter/AliRoot.git] / T0 / AliT0v1.cxx
1 /**************************************************************************
2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
3  *                                                                        *
4  * Author: The ALICE Off-line Project.                                    *
5  * Contributors are mentioned in the code where appropriate.              *
6  *                                                                        *
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8  * documentation strictly for non-commercial purposes is hereby granted   *
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10  * copies and that both the copyright notice and this permission notice   *
11  * appear in the supporting documentation. The authors make no claims     *
12  * about the suitability of this software for any purpose. It is          *
13  * provided "as is" without express or implied warranty.                  *
14  **************************************************************************/
15
16 /* $Id$ */
17
18 /////////////////////////////////////////////////////////////////////
19 //                                                                 //
20 // T0 ( T-zero) detector  version 1                             //
21 //
22 //Begin Html       
23 /*
24 <img src="gif/AliT0v1Class.gif">
25 */
26 //End Html
27 //                                                                  //
28 //                                                                  //
29 //////////////////////////////////////////////////////////////////////
30
31 #include <Riostream.h>
32 #include <stdlib.h>
33
34 #include <TGeometry.h>
35 #include <TLorentzVector.h>
36 #include <TMath.h>
37 #include <TNode.h>
38 #include <TTUBE.h>
39 #include <TVirtualMC.h>
40 #include "TGeoManager.h"
41 #include "TGeoMatrix.h"
42 #include "TGeoPgon.h"
43 #include "TGeoTube.h"
44 #include "TGeoCompositeShape.h"
45 #include <TGraph.h>
46
47 #include "AliLog.h"
48 #include "AliMagF.h"
49 #include "AliRun.h"
50
51 #include "AliT0hit.h"
52 #include "AliT0v1.h"
53 #include "AliT0Parameters.h"
54
55 #include "AliMC.h"
56 #include "AliCDBLocal.h"
57 #include "AliCDBStorage.h"
58 #include "AliCDBManager.h"
59 #include "AliCDBEntry.h"
60
61 ClassImp(AliT0v1)
62
63
64 //--------------------------------------------------------------------
65 AliT0v1::AliT0v1():  AliT0(),
66                      fIdSens1(0),
67                      fEffPMT(0x0)
68
69 {
70   //
71   // Standart constructor for T0 Detector version 0
72 }
73 //--------------------------------------------------------------------
74 AliT0v1::AliT0v1(const char *name, const char *title):
75   AliT0(name,title),
76   fIdSens1(0),
77   fEffPMT(0x0)
78
79 {
80   //
81   // Standart constructor for T0 Detector version 0
82   //
83   fIshunt = 2;
84   AliT0Parameters* param = AliT0Parameters::Instance();
85   for (Int_t i=0; i<24; i++){
86     TGraph* grEff = param ->GetPMTeff(i);
87     fEffPMT.AddAtAndExpand(grEff,i);
88   }
89 }
90 //_____________________________________________________________________________
91
92 AliT0v1::~AliT0v1() 
93 {
94   // desctructor  
95 }
96
97 //-------------------------------------------------------------------------
98 void AliT0v1::CreateGeometry()
99 {
100   //
101   // Create the geometry of T0 Detector version 0
102   //
103   // begin Html
104   /*
105    <img src="gif/AliT0v0.gif">
106   */
107   //
108
109
110    Int_t *idtmed = fIdtmed->GetArray();
111    /*
112    AliT0Parameters* param = AliT0Parameters::Instance();
113    param->Init();
114   Float_t zdetC = param->GetZposition(0);
115   Float_t zdetA = param->GetZposition(1);
116    */
117    Float_t zdetC = 69.7;
118    Float_t zdetA = 373.;
119
120   Int_t is;
121   Int_t idrotm[999];
122   Float_t x,y,z;
123   //C T0 mother volume
124   Float_t pstartR[18]={0., 360., 5., 
125                        -6.8, 4.25, 10., //-76.5+0.00+69.7
126                        -0.75 , 4.5, 10.,  // -76.5+6.05+69.7
127                        1.25   , 4.5, 10.,  //-76.5+8.05+69.7
128                        1.25 , 5.1, 10., //-76.5+8.05+69.7 
129                        6.8 , 5.1, 10.};  //-62.9+0.00+69.7
130   
131   Float_t pstart[3]={4., 12.5,6.8};
132   Float_t pinstart[3]={0.,1.51,6.5};
133   Float_t ppmt[3]={0.,1.5,3.5};
134   Float_t ptop[3]={0.,1.,1.0};
135   Float_t preg[3]={0., 1.0, 0.005}; //photcathode dobavil bogdanov
136   Float_t ptopout[3]={1.,1.01, 1.};  //metal air around raiator for photos reflection 
137   Float_t pbot[3]={0.6,1.2,0.1};
138   Float_t pglass[3]={1.2,1.3,2.};
139   Float_t pcer[3]={0.9,1.1,1.35};
140   Float_t psteel[3]={0.9,1.1,0.15};
141   Float_t psupport1[3] = {4.51,4.52,4.0};//C kozhuh vnutri
142   Float_t psupport2[3] = {9.4,9.5,4.0};// snaruzhi  C
143   Float_t psupport3[3] = {4.51,9.5,0.05};//kryshki  C
144   Float_t psupport5[3] = {1.44,1.49,6.5}; // stakanchik dlai feu  C
145   Float_t psupport6[3] = {0,1.4,0.04}; //kryshechka stakanchika  Al
146   Float_t psupport7[3] = {1.5,1.51,0.4}; //kolechko snaruzhu stakanchika Al
147    
148   // Mother Volume katushka dlia krepezha vokrug truby k Absorbru
149     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
150   Float_t ppcon[70]; 
151     ppcon[0]  =   0;
152     ppcon[1]  = 360;
153     ppcon[2]  =  13;
154 //  1: 
155     ppcon[3]  =  7.2;
156     ppcon[4]  =   4.4;
157     ppcon[5]  =   4.5;
158 //  2
159     ppcon[6]  = 8.2;
160     ppcon[7]  = 4.4;
161     ppcon[8]  = 4.5;
162 //  3
163     ppcon[9]  = 8.2;
164     ppcon[10] = 4.4;
165     ppcon[11] = 5.1;
166
167 //  4
168
169     ppcon[12] = 8.3; 
170     ppcon[13] = 4.4;
171     ppcon[14] = 5.1;
172 //  5
173
174     ppcon[15] = 8.3;
175     ppcon[16] = 4.9;
176     ppcon[17] = 5.1;
177     
178 //  6
179     ppcon[18] = 15.; 
180     ppcon[19] = 4.9;
181     ppcon[20] = 5.1;
182     
183 //  7
184     ppcon[21] = 15.; 
185     ppcon[22] = 3.15  ;
186     ppcon[23] = 5.1;
187
188 /// 8
189     ppcon[24] = 15.01; 
190     ppcon[25] = 3.15;
191     ppcon[26] = 5.1;
192
193 /// 9
194     ppcon[27] = 15.01; 
195     ppcon[28] = 3.15;
196     ppcon[29] = 3.25;
197
198     
199 /// 9
200      ppcon[30] = 19.71;
201      ppcon[31] = 3.15;
202      ppcon[32] = 3.25; 
203 //  10
204     ppcon[33] = 19.8; 
205     ppcon[34] = 3.15;
206     ppcon[35] = 3.25;
207     //  11
208     ppcon[36] = 19.8;
209     ppcon[37] = 3.15;
210     ppcon[38] = 7.6;
211         
212    //  14
213
214     ppcon[39] =  19.91;
215     ppcon[40] =  3.15;
216     ppcon[41] =  7.6;
217
218
219     gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,42);
220     z = -zdetC;
221     gMC->Gspos("0SUP",1,"ALIC",0.,0.,z,idrotm[901],"ONLY");
222    
223 //-------------------------------------------------------------------
224  //  T0 volume 
225  //-------------------------------------------------------------------
226   
227     
228     gMC->Gsvolu("0STR","PCON",idtmed[kAir],pstartR,18);
229     gMC->Gspos("0STR",1,"ALIC",0.,0.,-zdetC+pstartR[3],idrotm[901],"ONLY");
230     // gMC->Gspos("0STL",1,"ALIC",0.,0.,zdetA+pstart[2],0,"ONLY");
231
232 //T0 interior
233    gMC->Gsvolu("0INS","TUBE",idtmed[kAir],pinstart,3);
234    gMC->Gsvolu("0PMT","TUBE",idtmed[kAir],ppmt,3);     
235           
236     gMC->Gsvolu("0SU1","TUBE",idtmed[kC],psupport1,3);//C kozhuh vnutri
237     gMC->Gsvolu("0SU2","TUBE",idtmed[kC],psupport2,3);// snaruzhi  C
238     gMC->Gsvolu("0SU3","TUBE",idtmed[kC],psupport3,3);//kryshka perednaiai  C
239     gMC->Gsvolu("0SU4","TUBE",idtmed[kC],psupport3,3);//kryshka zadnaiai  C
240     //    gMC->Gsvolu("0SU5","TUBE",idtmed[kAir],psupport4,3);// dyrki dlia feu v zadnej kryshke Air
241     gMC->Gsvolu("0SU6","TUBE",idtmed[kC],psupport5,3);// stakanchik dlai feu  C
242     gMC->Gsvolu("0SU7","TUBE",idtmed[kAl],psupport6,3);//kryshechka stakanchika  Al
243     gMC->Gsvolu("0SU8","TUBE",idtmed[kAl],psupport7,3);//kolechko snaruzhu stakanchika Al
244    
245  
246
247    //non-absorber side support  and T0A !!!!!!!!
248     
249     TGeoPgon * supPgon = new TGeoPgon("supPgon",0.,360.,360,4);
250     supPgon->DefineSection(0, 0, 4.1, 5.5);
251     supPgon->DefineSection(1, 10.5 , 4.1, 5.5);
252     supPgon->DefineSection(2, 10.5 , 4.1, 4.9);
253     supPgon->DefineSection(3, 12.5 , 4.1, 4.9);
254     TGeoTranslation *trPgon = new TGeoTranslation("trPgon",0,0,0);
255     trPgon->RegisterYourself();
256  
257     TGeoVolumeAssembly * stlin = new TGeoVolumeAssembly("0STL");//empty segment
258     TGeoVolume *ins = gGeoManager->GetVolume("0INS");
259
260     //   Double_t phimin = TMath::ACos((16-4.8)/16.) * (180 / TMath::Pi()) ;
261     //  TGeoTubeSeg *hole = new TGeoTubeSeg("hole", 0, 1.6, 0, -phimin+90, phimin+90);
262     new TGeoTube("hole", 0, 1.61, 6.5);
263     TGeoTranslation *tr [12];
264     Float_t angle  = 2 * TMath::Pi() / 12;
265     Char_t nameTr[40];
266     for (Int_t itr=0; itr<12; itr++) {
267       sprintf (nameTr,"tr%i",itr+1);
268       x = 6.5 * TMath::Sin(itr * angle);
269       y = 6.5 * TMath::Cos(itr * angle);
270       tr[itr] = new TGeoTranslation(nameTr,x,y,6.5);
271       tr[itr]->RegisterYourself();
272        stlin->AddNode(ins,itr+13,tr[itr]);
273     }
274     TGeoCompositeShape *supsh = new TGeoCompositeShape("supsh","supPgon:trPgon-(hole:tr1+hole:tr2+hole:tr3+hole:tr4+hole:tr5+hole:tr6+hole:tr7+hole:tr8+hole:tr9+hole:tr10+hole:tr11+hole:tr12)");
275   
276     TGeoMedium *medal = gGeoManager->GetMedium("T0_Aluminium$");
277     TGeoVolume *supA = new TGeoVolume("0SUA",supsh,medal);
278     stlin->AddNode(supA,1,new TGeoTranslation(0,0,0));
279  
280     TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
281     alice->AddNode(stlin,1,new TGeoTranslation(0,0, zdetA ));
282             
283     // T0A finished
284
285     //T0C 
286 // first ring: 12 units of Scintillator+PMT+divider
287   Float_t  theta  = (180 / TMath::Pi()) * TMath::ATan(6.5 / zdetC);
288   Float_t phi[3];
289    for (is=0; is<12; is++)
290       {  
291
292         x = 6.6 * TMath::Sin(is * angle);
293         y = 6.6 * TMath::Cos(is * angle);
294         
295         phi[0] = -30 * is;
296         phi[1] = 90 - is * 30;
297         phi[2] = 90 - is * 30;
298         for (Int_t j = 0; j < 3; j++)
299           if (phi[j] < 0)  phi[j] += 360;
300         
301         AliMatrix (idrotm[902 + is], 90.,         phi[0],
302                    90. + theta, phi[1],
303                    theta,       phi[2]);  
304         z=-pstart[2]+pinstart[2]+0.2;
305         gMC->Gspos ("0INS", is + 1, "0STR", x, y, z, idrotm[902 + is], "ONLY");
306   }     
307      
308    x=0;
309    y=0;
310     z=-pinstart[2]+ppmt[2]+psupport6[2]*2;
311    gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
312    // PMT
313    
314    // Entry window (glass)
315    gMC->Gsvolu("0TOP","TUBE",idtmed[kOpGlass],ptop,3); //glass
316    z=-ppmt[2]+ptop[2];
317    gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
318    //"metal" air volume to simulate reclection  
319    gMC->Gsvolu("0TOO","TUBE",idtmed[kOpAir],ptopout,3); 
320    gMC->Gspos("0TOO",1,"0PMT",0,0,z,0,"ONLY");
321
322    //Fotokatod
323    gMC->Gsvolu ("0REG", "TUBE", idtmed[kOpGlassCathode], preg, 3); 
324    z = -ppmt[2] + 2 * ptop[2] + preg[2]; 
325    gMC->Gspos ("0REG", 1, "0PMT", 0, 0, z, 0, "ONLY"); 
326   // Bottom glass
327    gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
328    z=ppmt[2]-pbot[2];
329    gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
330    // Side cylinder glass
331    gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
332    z=ppmt[2]-pglass[2];
333    gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
334    //PMT electrodes support structure
335    gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
336    gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
337    z=-ppmt[2]+2*ptop[2]+0.3 + pcer[2];
338    gMC->Gspos("0CER",1,"0PMT",0,0,z,0,"ONLY");
339    z +=psteel[2]+pcer[2];
340    gMC->Gspos("0STE",1,"0PMT",0,0,z,0,"ONLY");
341     
342    //Support absorber (C) side
343    z=-pstart[2]+psupport1[2]+0.1;
344    gMC->Gspos("0SU1",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
345    gMC->Gspos("0SU2",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh vnutri
346    z=-pstart[2]+psupport3[2]; //+0.01;
347    gMC->Gspos("0SU3",1,"0STR",0,0,z,0,"ONLY"); //peredniaia kryshka
348    z=-pstart[2]+2.*psupport1[2]-0.05;//+0.1;
349    gMC->Gspos("0SU4",1,"0STR",0,0,z,0,"MANY"); //zadnaiai kryshka
350    gMC->Gspos("0SU6",1,"0INS",0,0,0,0,"ONLY");//C stakanchik dlia feu 
351    z=-pinstart[2]+psupport6[2];
352    gMC->Gspos("0SU7",1,"0INS",0,0,z,0,"ONLY"); //Al kryshechka 
353    
354    z=pinstart[2]-psupport7[2];
355    gMC->Gspos("0SU8",1,"0INS",0,0,z,0,"ONLY"); //Al kolechko
356    
357    
358    Float_t par[3];
359    par[0]=4.4;
360    par[1]=4.5;
361    par[2]=0.5;
362    gMC->Gsvolu("0SC0","TUBE",idtmed[kC],par,3);
363    z=ppcon[3]+par[2];
364    gMC->Gspos("0SC0",1,"0SUP",0,0,z,0,"ONLY"); 
365    z += par[2];
366    par[0]=4.4;
367    par[1]=5.1;
368    par[2]=0.05;
369    gMC->Gsvolu("0SC1","TUBE",idtmed[kC],par,3);
370    z += par[2];
371    gMC->Gspos("0SC1",1,"0SUP",0,0,z,0,"ONLY"); 
372    z=z+par[2];
373    par[0]=4.9;
374    par[1]=5.0;
375    par[2]=6.7/2;
376     gMC->Gsvolu("0SC2","TUBE",idtmed[kC],par,3);
377     z += par[2];
378     gMC->Gspos("0SC2",1,"0SUP",0,0,z,0,"ONLY"); 
379     z += par[2];
380    
381     par[0]=3.15;
382     par[1]=4.9;
383     par[2]=0.1/2;
384     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
385     
386     z += par[2];
387     gMC->Gspos("0SA1",1,"0SUP",0,0,z,0,"ONLY"); 
388     z=z+par[2];
389     par[0]=3.15;
390     par[1]=3.16;
391     par[2]=4.7/2;
392     gMC->Gsvolu("0SA2","TUBE",idtmed[kAl],par,3);
393     z += par[2];
394     gMC->Gspos("0SA2",1,"0SUP",0,0,z,0,"ONLY"); 
395     z=z+par[2];
396     par[0]=3.16; // eta chast' prikruchena k absorberu
397     par[1]=7.5;
398     par[2]=0.1;
399     gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
400     z += par[2];
401     gMC->Gspos("0SA3",1,"0SUP",0,0,z,0,"ONLY"); 
402     par[0]=3.16; // gvozdi eta chast' prikruchena k absorberu
403     par[1]=7.5;
404     par[2]=0.01;
405     gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
406     gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"ONLY"); 
407  
408    
409
410  
411 }    
412 //------------------------------------------------------------------------
413 void AliT0v1::AddAlignableVolumes() const
414 {
415   //
416   // Create entries for alignable volumes associating the symbolic volume
417   // name with the corresponding volume path. Needs to be syncronized with
418   // eventual changes in the geometry.
419   //
420
421   TString volPath;
422   TString symName, sn;
423
424   TString vpA  = "/ALIC_1/0STL_1/0INS_";
425   TString vpC  = "/ALIC_1/0STR_1/0INS_";
426   TString vpInside  = "/0PMT_1/0TOP_1";
427
428   for (Int_t imod=0; imod<24; imod++)
429     {
430       if (imod < 12) 
431         {volPath  = vpC; sn="T0/C/PMT";} 
432      else  
433        {volPath  = vpA; sn="T0/A/PMT";}
434       volPath += imod+1;
435       volPath += vpInside;
436       
437       symName = sn;
438       symName += imod+1;
439       
440       AliDebug(2,"--------------------------------------------");
441       AliDebug(2,Form("Alignable object %d", imod));
442       AliDebug(2,Form("volPath=%s\n",volPath.Data()));
443       AliDebug(2,Form("symName=%s\n",symName.Data()));
444       AliDebug(2,"--------------------------------------------");
445       if(!gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data()))
446         AliFatal(Form("Alignable entry %s not created. Volume path %s not valid",   symName.Data(),volPath.Data()));
447       
448     }
449 }   
450 //------------------------------------------------------------------------
451 void AliT0v1::CreateMaterials()
452 {
453    Int_t isxfld   = gAlice->Field()->Integ();
454    Float_t sxmgmx = gAlice->Field()->Max();
455    //   Float_t a,z,d,radl,absl,buf[1];
456    // Int_t nbuf;
457 // AIR
458                                                                                 
459    Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
460    Float_t zAir[4]={6.,7.,8.,18.};
461    Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
462    Float_t dAir = 1.20479E-3;
463                                                                                 
464 // Scintillator CH
465    Float_t ascin[2]={1.01,12.01};
466    Float_t zscin[2]={1,6};
467    Float_t wscin[2]={1,1};
468    Float_t denscin=1.03;
469 //Lucite C(CH3)CO2CH3
470    Float_t alucite[3]={1.01,12.01,15.999};
471    Float_t zlucite[3]={1,6,8};
472    Float_t wlucite[3]={8,5,2};
473    Float_t denlucite=1.16;
474  // PMT glass SiO2
475    Float_t aglass[2]={28.0855,15.9994};
476    Float_t zglass[2]={14.,8.};
477    Float_t wglass[2]={1.,2.};
478    Float_t dglass=2.65;
479 // Ceramic   97.2% Al2O3 , 2.8% SiO2
480    // Float_t wcer[2]={0.972,0.028};
481    Float_t aCeramic[2]  = { 26.981539,15.9994 };
482    Float_t zCeramic[2]  = { 13.,8. };
483    Float_t wCeramic[2]  = { 2.,3. };
484    Float_t denscer  = 3.6;
485
486 // Brass 80% Cu, 20% Zn
487    Float_t abrass[2] = {63.546,65.39};
488    Float_t zbrass[2] = {29,30};
489    Float_t wbrass[2] = {0.8,0.2};
490    Float_t denbrass=8.96;
491
492 //Ribber C6H12S
493    Float_t aribber[3] = {12.,1.,32.};
494    Float_t zribber[3] = {6.,1.,16.};
495    Float_t wribber[3] = {6.,12.,1.};
496    Float_t denribber=0.8;
497 // Support inside 
498    Float_t asupport[2] = {12.,1.};
499    Float_t zsupport[2] = {6.,1.};
500    Float_t wsupport[2] = {1.,1.};
501    Float_t densupport=0.1;
502     
503 //*** Definition Of avaible T0 materials ***
504    AliMaterial(0, "Steel$", 55.850,26.,7.87,1.76,999);
505    AliMaterial(1, "Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
506    AliMixture(2, "Air$", aAir, zAir, dAir,4,wAir);
507    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999); 
508    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999); 
509
510    AliMixture( 3, "Ceramic  $",aCeramic, zCeramic, denscer, -2, wCeramic);
511    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
512    /* 
513   char namate[21]="";
514   
515    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
516    acer[0]=a;  
517
518    zcer[0]=z;
519    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
520    acer[1]=a;
521    zcer[1]=z;
522    AliMixture( 11, "Ceramic    $", acer, zcer, denscer, 2, wcer);
523    */ 
524     AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
525    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
526    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
527    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
528    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
529    AliMixture( 21, "PMT Optical glass   $",aglass,zglass,dglass,-2,wglass);
530    AliMixture( 24, "PMT Optical glass cathode $",aglass,zglass,dglass,-2,wglass);
531     AliMixture(22, "T0 Opt Air$", aAir, zAir, dAir,4,wAir);
532    AliMixture(23, "T0 Opt Air Next$", aAir, zAir, dAir,4,wAir);
533    
534    AliMedium(1, "T0 Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
535    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
536    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
537    AliMedium(4, "Ceramic$", 3, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
538    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
539    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
540    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
541    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
542    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
543    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
544    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
545    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
546    AliMedium(16, "OpticalGlass$", 21, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
547    AliMedium(17, "T0 OpAir$", 22, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
548    AliMedium(18, "T0 OpAirNext$", 23, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
549     AliMedium(19, "OpticalGlassCathode$", 24, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
550    
551    AliDebugClass(1,": ++++++++++++++Medium set++++++++++");
552    
553    
554 }
555 //---------------------------------------------------------------------
556 void AliT0v1::DrawDetector()
557 {
558 //
559 // Draw a shaded view of the Forward multiplicity detector version 0
560 //
561   
562   //Set ALIC mother transparent
563   gMC->Gsatt("ALIC","SEEN",0);
564   //
565   //Set volumes visible
566   //  gMC->Gsatt("0STR","SEEN",0);
567   //  gMC->Gsatt("0INS","SEEN",0);
568   // gMC->Gsatt("0PMT","SEEN",1);
569   // gMC->Gsatt("0DIV","SEEN",1);
570   //
571   gMC->Gdopt("hide","off");
572   gMC->Gdopt("shad","on");
573   gMC->SetClipBox(".");
574   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
575   gMC->DefaultRange();
576   gMC->Gdraw("alic",90,0,0,-35,9.5,.6,0.6);
577   //gMC->Gdraw("alic",0,0,0,10,9.5,.8,0.8); //other side view
578   gMC->Gdhead(1111,"T-Zero detector");
579   gMC->Gdopt("hide","off");
580 }
581
582 //-------------------------------------------------------------------
583 void AliT0v1::DefineOpticalProperties()
584 {
585 // Optical properties definition.
586    Int_t *idtmed = fIdtmed->GetArray();
587 // Definition Cherenkov parameters
588    int i;
589    const Int_t kNbins=31;
590    
591    Float_t rindexSiO2[kNbins],  efficAll[kNbins], rindexAir[kNbins], absorAir[kNbins],rindexCathodeNext[kNbins], absorbCathodeNext[kNbins];
592             
593    // quartz 20mm
594    Float_t aAbsSiO2[kNbins]={29.0, 28.6, 28.3, 27.7, 27.3, 26.7, 26.4, 
595                              25.9, 25.3, 24.9, 24.5, 23.7, 
596                              23.2, 22.8, 22.4, 21.8, 21.3,
597                              22.8, 22.1, 21.7, 21.2, 20.5, 
598                              19.9, 19.3, 18.7, 18.0, 17.1, 
599                              16.3, 15.3, 14.3, 14.3   };
600           
601    Float_t aPckov[kNbins]  ={3.87, 3.94, 4.02, 4.11, 4.19, 4.29, 4.38,
602                              4.48, 4.58, 4.69, 4.81, 4.93, 
603                              5.05, 5.19, 5.33, 5.48, 5.63,
604                              5.8,  5.97, 6.16, 6.36, 6.57, 
605                              6.8,  7.04, 7.3,  7.58, 7.89, 
606                              8.22, 8.57, 8.97, 9.39 };  
607    /*     
608    Float_t effCathode[kNbins]={0.11, 0.13, 0.15, 0.16, 0.18, 0.19, 0.20,
609                               0.21, 0.22, 0.23, 0.24, 0.26, 
610                               0.27, 0.29, 0.30, 0.29, 0.29, 
611                               0.28, 0.28, 0.27, 0.26, 0.25, 
612                               0.25, 0.23, 0.20, 0.19, 0.17,
613                               0.17, 0.17, 0.2, 0.23};
614    */     
615    //  Float_t aAbsSiO2[kNbins]; //quartz 30mm
616   for(i=0;i<kNbins;i++)
617     {
618       aPckov[i]=aPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV   
619       rindexAir[i]=0;
620       rindexSiO2[i]=1.458; //refractive index for qwarts
621       rindexCathodeNext[i]=0;
622       efficAll[i]=1.;
623
624       //      aAbsSiO2[i]=28.5; //quartz 30mm
625       absorAir[i]=0.3;      
626       absorbCathodeNext[i]=0;
627
628     }
629   
630   
631    gMC->SetCerenkov (idtmed[kOpGlass], kNbins, aPckov, aAbsSiO2, efficAll, rindexSiO2 );
632    // gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2, effCathode, rindexSiO2 );
633    gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2,efficAll , rindexSiO2 );
634   gMC->SetCerenkov (idtmed[kOpAir], kNbins, aPckov,absorAir , efficAll,rindexAir );
635    gMC->SetCerenkov (idtmed[kOpAirNext], kNbins, aPckov,absorbCathodeNext , efficAll, rindexCathodeNext);
636 }
637
638 //-------------------------------------------------------------------
639 void AliT0v1::Init()
640 {
641 // Initialises version 0 of the Forward Multiplicity Detector
642 //
643   AliT0::Init();
644   fIdSens1=gMC->VolId("0REG");
645
646    AliDebug(1,Form("%s: *** T0 version 1 initialized ***\n",ClassName()));
647 }
648
649 //-------------------------------------------------------------------
650
651 void AliT0v1::StepManager()
652 {
653   //
654   // Called for every step in the T0 Detector
655   //
656   Int_t id,copy,copy1;
657   static Float_t hits[6];
658   static Int_t vol[2];
659   TLorentzVector pos;
660   
661   //   TClonesArray &lhits = *fHits;
662   
663   if(!gMC->IsTrackAlive()) return; // particle has disappeared
664   
665   
666     // If particles is photon then ...
667   
668  if (gMC->TrackPid() == 50000050)
669   {
670       id=gMC->CurrentVolID(copy);
671       
672       
673       // Check the sensetive volume
674       if(id==fIdSens1 ) { 
675         if(gMC->IsTrackEntering()) {
676             gMC->CurrentVolOffID(2,copy);
677             vol[1]=copy;
678             gMC->CurrentVolOffID(3,copy1);
679             vol[0]=copy1;
680             gMC->TrackPosition(pos);
681             hits[0] = pos[0];
682             hits[1] = pos[1];
683             hits[2] = pos[2];
684             if(pos[2]<0) vol[0]=2;
685             if(pos[2]>=0) vol[0]=1; 
686             
687             Float_t etot=gMC->Etot();
688             hits[3]=etot;
689             Int_t iPart= gMC->TrackPid();
690             Int_t partID=gMC->IdFromPDG(iPart);
691             hits[4]=partID;
692             Float_t ttime=gMC->TrackTime();
693             hits[5]=ttime*1e12;
694             if(RegisterPhotoE(vol[1]-1,hits[3])) 
695               AddHit(fIshunt,vol,hits);
696             
697           }
698           //  cout<< gAlice->GetMCApp()->GetCurrentTrackNumber()<<" hit added "<<endl;
699         
700         /*              
701                 printf("track(%i) alive(%i) disap(%i) enter(%i) exit(%i) inside(%i) out(%i) stop(%i) new(%i) \n",
702                        gAlice->GetMCApp()->GetCurrentTrackNumber(),
703                gMC->IsTrackAlive(),
704                gMC->IsTrackDisappeared(),
705                gMC->IsTrackEntering(),
706                gMC->IsTrackExiting(),
707                gMC->IsTrackInside(),
708                gMC->IsTrackOut(),
709                gMC->IsTrackStop(),
710                gMC->IsNewTrack());
711         */              
712       } //sensitive
713   } //photon
714 }
715
716
717
718 //------------------------------------------------------------------------
719 Bool_t AliT0v1::RegisterPhotoE(Int_t ipmt,Double_t energy)
720 {
721
722   
723   //  Float_t hc=197.326960*1.e6; //mev*nm
724   Double_t hc=1.973*1.e-6; //gev*nm
725   Float_t lambda=hc/energy;
726   Float_t eff = ((TGraph*) fEffPMT.At(ipmt))->Eval(lambda);
727   Double_t  p = gRandom->Rndm();
728
729   if (p > eff)
730     return kFALSE;
731   
732   return kTRUE;
733 }
734
735 //----------------------------------------------------------------------------
736
737
738
739
740
741