51812163ef3bfaeed4f97e8085447fade17f16c6
[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 "TGeoCompositeShape.h"
35 #include "TGeoManager.h"
36 #include "TGeoMatrix.h"
37 #include "TGeoPcon.h"
38 #include "TGeoTube.h"
39 #include <TGeoGlobalMagField.h>
40 #include <TGraph.h>
41 #include <TLorentzVector.h>
42 #include <TMath.h>
43 #include <TVirtualMC.h>
44 #include <TString.h>
45
46 #include "AliLog.h"
47 #include "AliMagF.h"
48 #include "AliRun.h"
49
50 #include "AliT0hit.h"
51 #include "AliT0v1.h"
52 #include "AliT0Parameters.h"
53
54 #include "AliMC.h"
55 #include "AliCDBLocal.h"
56 #include "AliCDBStorage.h"
57 #include "AliCDBManager.h"
58 #include "AliCDBEntry.h"
59 #include "AliTrackReference.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   Double_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 , 4.45, 10.,  // -76.5+6.05+69.7
127                        //  1.25   , 4.45, 10.,  //-76.5+8.05+69.7
128                        -0.75 , 4.5, 10.,  // -76.5+6.05+69.7
129                        1.25   , 4.5, 10.,  //-76.5+8.05+69.7
130                        1.25 , 5.1, 10, //-76.5+8.05+69.7 
131                        6.8 , 5.1, 10.};  //-62.9+0.00+69.7
132   
133   Float_t pstart[3]={4., 12.5,6.8};
134   Float_t pinstart[3]={0.,1.45,6.5};
135   Float_t ppmt[3]={0.,1.4,3.5};
136   Float_t ptop[3]={0.,1.,1.0};
137   Float_t preg[3]={0., 1.0, 0.005}; //photcathode dobavil bogdanov
138   Float_t ptopout[3]={1.,1.01, 1.};  //metal air around raiator for photos reflection 
139   Float_t pbot[3]={0.6,1.2,0.1};
140   Float_t pglass[3]={1.2,1.3,2.};
141   Float_t pcer[3]={0.9,1.1,1.35};
142   Float_t psteel[3]={0.9,1.1,0.15};
143   Float_t psupport1[3] = {4.51,4.52,4.0};//C kozhuh vnutri
144   Float_t psupport2[3] = {9.5,9.6,4.0};// snaruzhi  C
145   Float_t psupport3[3] = {4.52,9.5, 0.05};//kryshki  C
146   Float_t psupport5[3] = {1.44,1.45,6.5}; // stakanchik dlai feu  C
147   Float_t psupport6[3] = {0,1.4,0.04}; //kryshechka stakanchika  Al
148   Float_t psupport7[3] = {1.44,1.45,0.4}; //kolechko snaruzhu stakanchika Al
149    
150   // Mother Volume katushka dlia krepezha vokrug truby k Absorbru
151     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
152   Float_t ppcon[70]; 
153     ppcon[0]  =   0;
154     ppcon[1]  = 360;
155     ppcon[2]  =  13;
156 //  1: 
157     ppcon[3]  =  7.2;
158     ppcon[4]  =   4.4;
159     ppcon[5]  =   4.5;
160 //  2
161     ppcon[6]  = 8.2;
162     ppcon[7]  = 4.4;
163     ppcon[8]  = 4.5;
164 //  3
165     ppcon[9]  = 8.2;
166     ppcon[10] = 4.4;
167     ppcon[11] = 5.1;
168
169 //  4
170
171     ppcon[12] = 8.3; 
172     ppcon[13] = 4.4;
173     ppcon[14] = 5.1;
174 //  5
175
176     ppcon[15] = 8.3;
177     ppcon[16] = 4.9;
178     ppcon[17] = 5.1;
179     
180 //  6
181     ppcon[18] = 15.; 
182     ppcon[19] = 4.9;
183     ppcon[20] = 5.1;
184     
185 //  7
186     ppcon[21] = 15.; 
187     ppcon[22] = 3.15  ;
188     ppcon[23] = 5.1;
189
190 /// 8
191     ppcon[24] = 15.01; 
192     ppcon[25] = 3.15;
193     ppcon[26] = 5.1;
194
195 /// 9
196     ppcon[27] = 15.01; 
197     ppcon[28] = 3.15;
198     ppcon[29] = 3.25;
199
200     
201 /// 9
202      ppcon[30] = 19.71;
203      ppcon[31] = 3.15;
204      ppcon[32] = 3.25; 
205 //  10
206     ppcon[33] = 19.8; 
207     ppcon[34] = 3.15;
208     ppcon[35] = 3.25;
209     //  11
210     ppcon[36] = 19.8;
211     ppcon[37] = 3.15;
212     ppcon[38] = 7.6;
213         
214    //  14
215
216     ppcon[39] =  19.99;
217     ppcon[40] =  3.15;
218     ppcon[41] =  7.6;
219
220
221     gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,42);
222     z = -zdetC;
223     gMC->Gspos("0SUP",1,"ALIC",0.,0.,z,idrotm[901],"ONLY");
224    
225 //-------------------------------------------------------------------
226  //  T0 volume 
227  //-------------------------------------------------------------------
228   
229     
230     gMC->Gsvolu("0STR","PCON",idtmed[kAir],pstartR,18);
231     gMC->Gspos("0STR",1,"ALIC",0.,0.,-zdetC+pstartR[3],idrotm[901],"ONLY");
232     // gMC->Gspos("0STL",1,"ALIC",0.,0.,zdetA+pstart[2],0,"ONLY");
233
234 //T0 interior
235    gMC->Gsvolu("0INS","TUBE",idtmed[kAir],pinstart,3);
236    gMC->Gsvolu("0PMT","TUBE",idtmed[kAir],ppmt,3);     
237           
238     gMC->Gsvolu("0SU1","TUBE",idtmed[kC],psupport1,3);//C kozhuh vnutri
239     gMC->Gsvolu("0SU2","TUBE",idtmed[kC],psupport2,3);// snaruzhi  C
240     gMC->Gsvolu("0SU3","TUBE",idtmed[kC],psupport3,3);//kryshka perednaiai  C
241     gMC->Gsvolu("0SU4","TUBE",idtmed[kC],psupport3,3);//kryshka zadnaiai  C
242     //    gMC->Gsvolu("0SU5","TUBE",idtmed[kAir],psupport4,3);// dyrki dlia feu v zadnej kryshke Air
243     gMC->Gsvolu("0SU6","TUBE",idtmed[kC],psupport5,3);// stakanchik dlai feu  C
244     gMC->Gsvolu("0SU7","TUBE",idtmed[kAl],psupport6,3);//kryshechka stakanchika  Al
245     gMC->Gsvolu("0SU8","TUBE",idtmed[kAl],psupport7,3);//kolechko snaruzhu stakanchika Al
246    
247  
248
249    //non-absorber side support  and T0A !!!!!!!!
250     
251     TGeoPcon * supPgon = new TGeoPcon("0supPgon",0.,360.,4);
252     supPgon->DefineSection(0, 0, 4.1, 5.5);
253     supPgon->DefineSection(1, 10.5 , 4.1, 5.5);
254     supPgon->DefineSection(2, 10.5 , 4.1, 4.9);
255     supPgon->DefineSection(3, 12.5 , 4.1, 4.9);
256     TGeoTranslation *trPgon = new TGeoTranslation("0trPgon",0,0,0);
257     trPgon->RegisterYourself();
258  
259     TGeoVolumeAssembly * stlin = new TGeoVolumeAssembly("0STL");//empty segment
260     TGeoVolume *ins = gGeoManager->GetVolume("0INS");
261
262     new TGeoTube("0HOLE", 0, 1.51, 6.5);
263     TGeoTranslation *tr [12];
264     Double_t angle  = 2 * TMath::Pi() / 12;
265     // Char_t nameTr[40];
266     TString nameTr;
267     for (Int_t itr=0; itr<12; itr++) {
268       //      sprintf (nameTr,"0TR%i",itr+1);
269       nameTr = Form("0TR%i",itr+1);
270       x = 6.5 * TMath::Sin(itr * angle);
271       y = 6.5 * TMath::Cos(itr * angle);
272       tr[itr] = new TGeoTranslation(nameTr.Data(),x,y,6.5);
273       tr[itr]->RegisterYourself();
274       stlin->AddNode(ins,itr+13,tr[itr]);
275     }
276     TGeoCompositeShape *supsh = new TGeoCompositeShape("0supsh","0supPgon:0trPgon-(0HOLE:0TR1+0HOLE:0TR2+0HOLE:0TR3+0HOLE:0TR4+0HOLE:0TR5+0HOLE:0TR6+0HOLE:0TR7+0HOLE:0TR8+0HOLE:0TR9+0HOLE:0TR10+0HOLE:0TR11+0HOLE:0TR12)");
277   
278     TGeoMedium *medal = gGeoManager->GetMedium("T0_Aluminium$");
279     TGeoVolume *supA = new TGeoVolume("0SUA",supsh,medal);
280     stlin->AddNode(supA,1,new TGeoTranslation(0,0,0));
281  
282     TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
283     alice->AddNode(stlin,1,new TGeoTranslation(0,0, zdetA ));
284             
285     // T0A finished
286
287     //T0C 
288 // first ring: 12 units of Scintillator+PMT+divider
289   Float_t  theta  = (180 / TMath::Pi()) * TMath::ATan(6.6 / zdetC);
290   Float_t phi[3];
291    for (is=0; is<12; is++)
292       {  
293
294         x = 6.6 * TMath::Sin(is * angle);
295         y = 6.6 * TMath::Cos(is * angle);
296         
297         phi[0] = -30 * is;
298         phi[1] = 90 - is * 30;
299         phi[2] = 90 - is * 30;
300         for (Int_t j = 0; j < 3; j++)
301           if (phi[j] < 0)  phi[j] += 360;
302         
303         AliMatrix (idrotm[902 + is], 90.,         phi[0],
304                    90. + theta, phi[1],
305                    theta,       phi[2]);  
306         z=-pstart[2]+pinstart[2]+0.3;
307         gMC->Gspos ("0INS", is + 1, "0STR", x, y, z, idrotm[902 + is], "ONLY");
308   }     
309      
310    x=0;
311    y=0;
312    //   z=-pinstart[2]+ppmt[2]+psupport6[2]*2;
313    z=-pinstart[2]+ppmt[2]+0.08; //+psupport6[2];
314    gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
315    // PMT
316    
317    // Entry window (glass)
318    gMC->Gsvolu("0TOP","TUBE",idtmed[kOpGlass],ptop,3); //glass
319    z=-ppmt[2]+ptop[2];
320    gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
321    //"metal" air volume to simulate reclection  
322    gMC->Gsvolu("0TOO","TUBE",idtmed[kOpAir],ptopout,3); 
323    gMC->Gspos("0TOO",1,"0PMT",0,0,z,0,"ONLY");
324
325    //Fotokatod
326    gMC->Gsvolu ("0REG", "TUBE", idtmed[kOpGlassCathode], preg, 3); 
327    z = -ppmt[2] + 2 * ptop[2] + preg[2]; 
328    gMC->Gspos ("0REG", 1, "0PMT", 0, 0, z, 0, "ONLY"); 
329   // Bottom glass
330    gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
331    z=ppmt[2]-pbot[2];
332    gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
333    // Side cylinder glass
334    gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
335    z=ppmt[2]-pglass[2];
336    gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
337    //PMT electrodes support structure
338    gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
339    gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
340    z=-ppmt[2]+2*ptop[2]+0.3 + pcer[2];
341    gMC->Gspos("0CER",1,"0PMT",0,0,z,0,"ONLY");
342    z +=psteel[2]+pcer[2];
343    gMC->Gspos("0STE",1,"0PMT",0,0,z,0,"ONLY");
344     
345    //Support absorber (C) side
346    z=-pstart[2]+psupport1[2];//  0.05; //0.1;
347    gMC->Gspos("0SU1",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
348    gMC->Gspos("0SU2",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh vnutri
349    z=-pstart[2]+psupport3[2];//  - 0.1;
350    gMC->Gspos("0SU3",1,"0STR",0,0,z,0,"ONLY"); //peredniaia kryshka
351    z=-pstart[2]+2.*psupport1[2];//+0.1;
352    gMC->Gspos("0SU4",1,"0STR",0,0,z,0,"MANY"); //zadnaiai kryshka
353    gMC->Gspos("0SU6",1,"0INS",0,0,0,0,"ONLY");//C stakanchik dlia feu 
354    z=-pinstart[2]+psupport6[2]; //-0.1;
355    gMC->Gspos("0SU7",1,"0INS",0,0,z,0,"ONLY"); //Al kryshechka 
356    
357    z=pinstart[2]-psupport7[2];
358    //  gMC->Gspos("0SU8",1,"0SU6",0,0,z,0,"ONLY"); //Al kolechko
359    
360    
361    Float_t par[3];
362    par[0]=4.4;
363    par[1]=4.5;
364    par[2]=0.5;
365    gMC->Gsvolu("0SC0","TUBE",idtmed[kC],par,3);
366    z=ppcon[3]+par[2];
367    gMC->Gspos("0SC0",1,"0SUP",0,0,z,0,"ONLY"); 
368    z += par[2];
369    par[0]=4.4;
370    par[1]=5.1;
371    par[2]=0.05;
372    gMC->Gsvolu("0SC1","TUBE",idtmed[kC],par,3);
373    z += par[2];
374    gMC->Gspos("0SC1",1,"0SUP",0,0,z,0,"ONLY"); 
375    z=z+par[2];
376    par[0]=4.9;
377    par[1]=5.0;
378    par[2]=6.7/2;
379     gMC->Gsvolu("0SC2","TUBE",idtmed[kC],par,3);
380     z += par[2];
381     gMC->Gspos("0SC2",1,"0SUP",0,0,z,0,"ONLY"); 
382     z += par[2];
383    
384     par[0]=3.15;
385     par[1]=4.9;
386     par[2]=0.01/2;
387
388     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
389     
390      z += par[2];
391      //  z -= par[2];
392     gMC->Gspos("0SA1",1,"0SUP",0,0,z,0,"ONLY"); 
393     z=z+par[2];
394     par[0]=3.15;
395     par[1]=3.16;
396     par[2]=4.7/2;
397     gMC->Gsvolu("0SA2","TUBE",idtmed[kAl],par,3);
398     z += par[2];
399     gMC->Gspos("0SA2",1,"0SUP",0,0,z,0,"ONLY"); 
400     z=z+par[2];
401     par[0]=3.16; // eta chast' prikruchena k absorberu
402     par[1]=7.4;
403     par[2]=0.01;
404     gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
405     //   z += par[2];
406    z = ppcon[39] - par[2];
407     gMC->Gspos("0SA3",1,"0SUP",0,0,z,0,"ONLY"); 
408     par[0]=3.16; // gvozdi eta chast' prikruchena k absorberu
409     par[1]=7.4;
410     par[2]=0.01;
411     gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
412     gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"MANY"); 
413  
414    
415
416  
417 }    
418 //------------------------------------------------------------------------
419 void AliT0v1::AddAlignableVolumes() const
420 {
421   //
422   // Create entries for alignable volumes associating the symbolic volume
423   // name with the corresponding volume path. Needs to be syncronized with
424   // eventual changes in the geometry.
425   //
426
427   // TString volPath;
428   // TString symName, sn;
429   
430
431
432
433   TString volPath;
434   TString symName, sn;
435
436   TString vpA  = "/ALIC_1/0STL_1/0INS_";
437   TString vpC  = "/ALIC_1/0STR_1/0INS_";
438   TString vpInside  = "/0PMT_1/0TOP_1";
439   TString vpAalign = "/ALIC_1/0STL_1";
440   TString vpCalign = "/ALIC_1/0STR_1";
441   
442   for (Int_t imod=0; imod<26; imod++)
443     {
444       if (imod < 24)
445       {
446        if (imod < 12)
447          { volPath  = vpC; sn="T0/C/PMT";}
448         else
449           { volPath  = vpA; sn="T0/A/PMT";}
450       volPath += imod+1;
451       volPath += vpInside;
452       symName = sn;
453      symName += imod+1;
454      }
455      else if (imod == 24)
456        {volPath  = vpCalign; symName="/ALIC_1/0STR_1";}
457      else
458        {volPath  = vpAalign; symName="/ALIC_1/0STL_1";}
459
460       AliDebug(2,"--------------------------------------------");
461       AliDebug(2,Form("Alignable object %d", imod));
462       AliDebug(2,Form("volPath=%s\n",volPath.Data()));
463       AliDebug(2,Form("symName=%s\n",symName.Data()));
464       AliDebug(2,"--------------------------------------------");
465       if(!gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data()))
466        AliFatal(Form("Alignable entry %s not created. Volume path %s not valid",
467 symName.Data(),volPath.Data()));
468    }
469 }   
470 //------------------------------------------------------------------------
471 void AliT0v1::CreateMaterials()
472 {
473    Int_t isxfld   = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Integ();
474    Float_t sxmgmx = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Max();
475    //   Float_t a,z,d,radl,absl,buf[1];
476    // Int_t nbuf;
477 // AIR
478                                                                                 
479    Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
480    Float_t zAir[4]={6.,7.,8.,18.};
481    Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
482    Float_t dAir = 1.20479E-3;
483    Float_t dAir1 = 1.20479E-11;
484                                                                                
485 // Scintillator CH
486    Float_t ascin[2]={1.01,12.01};
487    Float_t zscin[2]={1,6};
488    Float_t wscin[2]={1,1};
489    Float_t denscin=1.03;
490 //Lucite C(CH3)CO2CH3
491    Float_t alucite[3]={1.01,12.01,15.999};
492    Float_t zlucite[3]={1,6,8};
493    Float_t wlucite[3]={8,5,2};
494    Float_t denlucite=1.16;
495  // PMT glass SiO2
496    Float_t aglass[2]={28.0855,15.9994};
497    Float_t zglass[2]={14.,8.};
498    Float_t wglass[2]={1.,2.};
499    Float_t dglass=2.65;
500 // Ceramic   97.2% Al2O3 , 2.8% SiO2
501    // Float_t wcer[2]={0.972,0.028};
502    Float_t aCeramic[2]  = { 26.981539,15.9994 };
503    Float_t zCeramic[2]  = { 13.,8. };
504    Float_t wCeramic[2]  = { 2.,3. };
505    Float_t denscer  = 3.6;
506
507 // Brass 80% Cu, 20% Zn
508    Float_t abrass[2] = {63.546,65.39};
509    Float_t zbrass[2] = {29,30};
510    Float_t wbrass[2] = {0.8,0.2};
511    Float_t denbrass=8.96;
512
513 //Ribber C6H12S
514    Float_t aribber[3] = {12.,1.,32.};
515    Float_t zribber[3] = {6.,1.,16.};
516    Float_t wribber[3] = {6.,12.,1.};
517    Float_t denribber=0.8;
518 // Support inside 
519    Float_t asupport[2] = {12.,1.};
520    Float_t zsupport[2] = {6.,1.};
521    Float_t wsupport[2] = {1.,1.};
522    Float_t densupport=0.1;
523     
524 //*** Definition Of avaible T0 materials ***
525    AliMaterial(0, "Steel$", 55.850,26.,7.87,1.76,999);
526    AliMixture(1, "Vacuum$", aAir, zAir, dAir1,4,wAir);
527    AliMixture(2, "Air$", aAir, zAir, dAir,4,wAir);
528    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999); 
529    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999); 
530
531    AliMixture( 3, "Ceramic  $",aCeramic, zCeramic, denscer, -2, wCeramic);
532    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
533    /* 
534   char namate[21]="";
535   
536    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
537    acer[0]=a;  
538
539    zcer[0]=z;
540    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
541    acer[1]=a;
542    zcer[1]=z;
543    AliMixture( 11, "Ceramic    $", acer, zcer, denscer, 2, wcer);
544    */ 
545     AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
546    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
547    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
548    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
549    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
550    AliMixture( 21, "PMT Optical glass   $",aglass,zglass,dglass,-2,wglass);
551    AliMixture( 24, "PMT Optical glass cathode $",aglass,zglass,dglass,-2,wglass);
552     AliMixture(22, "T0 Opt Air$", aAir, zAir, dAir,4,wAir);
553    AliMixture(23, "T0 Opt Air Next$", aAir, zAir, dAir,4,wAir);
554    
555    AliMedium(1, "T0 Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
556    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
557    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
558    AliMedium(4, "Ceramic$", 3, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
559    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
560    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
561    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
562    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
563    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
564    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
565    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
566    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
567    AliMedium(16, "OpticalGlass$", 21, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
568    AliMedium(17, "T0 OpAir$", 22, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
569    AliMedium(18, "T0 OpAirNext$", 23, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
570     AliMedium(19, "OpticalGlassCathode$", 24, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
571    
572    AliDebugClass(1,": ++++++++++++++Medium set++++++++++");
573    
574    
575 }
576
577 //-------------------------------------------------------------------
578 void AliT0v1::DefineOpticalProperties()
579 {
580 // Optical properties definition.
581    Int_t *idtmed = fIdtmed->GetArray();
582 // Definition Cherenkov parameters
583    int i;
584    const Int_t kNbins=31;
585    
586    Float_t rindexSiO2[kNbins],  efficAll[kNbins], rindexAir[kNbins], absorAir[kNbins],rindexCathodeNext[kNbins], absorbCathodeNext[kNbins];
587    Double_t efficMet[kNbins], aReflMet[kNbins];
588            
589    // quartz 20mm
590    Float_t aAbsSiO2[kNbins]={29.0, 28.6, 28.3, 27.7, 27.3, 26.7, 26.4, 
591                              25.9, 25.3, 24.9, 24.5, 23.7, 
592                              23.2, 22.8, 22.4, 21.8, 21.3,
593                              22.8, 22.1, 21.7, 21.2, 20.5, 
594                              19.9, 19.3, 18.7, 18.0, 17.1, 
595                              16.3, 15.3, 14.3, 14.3   };
596           
597    Float_t aPckov[kNbins]  ={3.87, 3.94, 4.02, 4.11, 4.19, 4.29, 4.38,
598                              4.48, 4.58, 4.69, 4.81, 4.93, 
599                              5.05, 5.19, 5.33, 5.48, 5.63,
600                              5.8,  5.97, 6.16, 6.36, 6.57, 
601                              6.8,  7.04, 7.3,  7.58, 7.89, 
602                              8.22, 8.57, 8.97, 9.39 };  
603   Double_t dPckov[kNbins]  ={3.87, 3.94, 4.02, 4.11, 4.19, 4.29, 4.38,
604                              4.48, 4.58, 4.69, 4.81, 4.93,
605                              5.05, 5.19, 5.33, 5.48, 5.63,
606                              5.8,  5.97, 6.16, 6.36, 6.57,
607                              6.8,  7.04, 7.3,  7.58, 7.89,
608                              8.22, 8.57, 8.97, 9.39 };
609
610    /*     
611    Float_t effCathode[kNbins]={0.11, 0.13, 0.15, 0.16, 0.18, 0.19, 0.20,
612                               0.21, 0.22, 0.23, 0.24, 0.26, 
613                               0.27, 0.29, 0.30, 0.29, 0.29, 
614                               0.28, 0.28, 0.27, 0.26, 0.25, 
615                               0.25, 0.23, 0.20, 0.19, 0.17,
616                               0.17, 0.17, 0.2, 0.23};
617    */     
618    //  Float_t aAbsSiO2[kNbins]; //quartz 30mm
619  for(i=0;i<kNbins;i++)
620
621     {
622       aPckov[i]=aPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV
623       dPckov[i]=dPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV 
624       rindexAir[i]=0.0001;
625       rindexSiO2[i]=1.458; //refractive index for qwarts
626       rindexCathodeNext[i]=0;
627       efficAll[i]=1.;
628       efficMet[i]=0.;
629       aReflMet[i]=1.;
630       //      aAbsSiO2[i]=28.5; //quartz 30mm
631       absorAir[i]=0.3;      
632       absorbCathodeNext[i]=0;
633
634     }
635   
636   gMC->SetCerenkov (idtmed[kOpGlass], kNbins, aPckov, aAbsSiO2, efficAll, rindexSiO2 );
637    // gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2, effCathode, rindexSiO2 );
638    gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2,efficAll , rindexSiO2 );
639   gMC->SetCerenkov (idtmed[kOpAir], kNbins, aPckov,absorAir , efficAll,rindexAir );
640    gMC->SetCerenkov (idtmed[kOpAirNext], kNbins, aPckov,absorbCathodeNext , efficAll, rindexCathodeNext);
641
642    //Define a boarder for radiator optical properties
643    gMC->DefineOpSurface("surfRd", kUnified /*kGlisur*/,kDielectric_metal,kPolished, 0.);
644    gMC->SetMaterialProperty("surfRd", "EFFICIENCY", kNbins, dPckov, efficMet);
645    gMC->SetMaterialProperty("surfRd", "REFLECTIVITY", kNbins, dPckov, aReflMet);
646    gMC->SetBorderSurface("0TOPborder", "0TOP",1,"0TOO",1, "surfRd");
647
648
649 }
650
651 //-------------------------------------------------------------------
652 void AliT0v1::Init()
653 {
654 // Initialises version 0 of the Forward Multiplicity Detector
655 //
656   AliT0::Init();
657   fIdSens1=gMC->VolId("0REG");
658
659    AliDebug(1,Form("%s: *** T0 version 1 initialized ***\n",ClassName()));
660 }
661
662 //-------------------------------------------------------------------
663
664 void AliT0v1::StepManager()
665 {
666   //
667   // Called for every step in the T0 Detector
668   //
669   Int_t id,copy,copy1;
670   static Float_t hits[6];
671   static Int_t vol[2];
672   TLorentzVector pos;
673   TLorentzVector mom;
674   
675   //   TClonesArray &lhits = *fHits;
676   
677   if(!gMC->IsTrackAlive()) return; // particle has disappeared
678   
679   id=gMC->CurrentVolID(copy);
680   
681   // Check the sensetive volume
682   if(id==fIdSens1 ) { 
683     if(gMC->IsTrackEntering()) {
684       gMC->CurrentVolOffID(2,copy);
685       vol[1]=copy;
686       gMC->CurrentVolOffID(3,copy1);
687       vol[0]=copy1;
688       gMC->TrackPosition(pos);
689       hits[0] = pos[0];
690       hits[1] = pos[1];
691       hits[2] = pos[2];
692       if(pos[2]<0) vol[0] = 2;
693       if(pos[2]>=0) vol[0] = 1; 
694       
695       Float_t etot=gMC->Etot();
696       hits[3]=etot;
697       Int_t iPart= gMC->TrackPid();
698       Int_t partID=gMC->IdFromPDG(iPart);
699       hits[4]=partID;
700       Float_t ttime=gMC->TrackTime();
701       hits[5]=ttime*1e12;
702       if (gMC->TrackPid() == 50000050)   // If particles is photon then ...
703         {
704           if(RegisterPhotoE(vol[1]-1,hits[3])) {
705             AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(),vol,hits);
706             // Create a track reference at the exit of photocatode
707           }         
708         }
709
710       //charge particle 
711       if ( gMC->TrackCharge() )
712         AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kT0);
713       
714         /*              
715                 printf("track(%i) alive(%i) disap(%i) enter(%i) exit(%i) inside(%i) out(%i) stop(%i) new(%i) \n",
716                        gAlice->GetMCApp()->GetCurrentTrackNumber(),
717                gMC->IsTrackAlive(),
718                gMC->IsTrackDisappeared(),
719                gMC->IsTrackEntering(),
720                gMC->IsTrackExiting(),
721                gMC->IsTrackInside(),
722                gMC->IsTrackOut(),
723                gMC->IsTrackStop(),
724                gMC->IsNewTrack());
725         */
726     }// trck entering           
727   } //sensitive
728   
729 }
730
731
732
733 //------------------------------------------------------------------------
734 Bool_t AliT0v1::RegisterPhotoE(Int_t ipmt,Double_t energy)
735 {
736
737   
738   //  Float_t hc=197.326960*1.e6; //mev*nm
739   Double_t hc=1.973*1.e-6; //gev*nm
740   Float_t lambda=hc/energy;
741   Float_t eff = ((TGraph*) fEffPMT.At(ipmt))->Eval(lambda);
742   Double_t  p = gRandom->Rndm();
743
744   if (p > eff)
745     return kFALSE;
746   
747   return kTRUE;
748 }
749
750 //----------------------------------------------------------------------------
751
752
753
754
755
756