ae47b1a54ab33ead3f7516870ad33eb03695bff4
[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  *                                                                        *
7  * Permission to use, copy, modify and distribute this software and its   *
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 "TGeoPgon.h"
42 #include "TGeoTube.h"
43 #include "TGeoCompositeShape.h"
44 #include <TGraph.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
60 ClassImp(AliT0v1)
61
62
63 //--------------------------------------------------------------------
64 AliT0v1::AliT0v1():  AliT0(),
65                      fIdSens1(0),
66                      fEffPMT(0x0)
67
68 {
69   //
70   // Standart constructor for T0 Detector version 0
71 }
72 //--------------------------------------------------------------------
73 AliT0v1::AliT0v1(const char *name, const char *title):
74   AliT0(name,title),
75   fIdSens1(0),
76   fEffPMT(0x0)
77
78 {
79   //
80   // Standart constructor for T0 Detector version 0
81   //
82   fIshunt = 2;
83   AliT0Parameters* param = AliT0Parameters::Instance();
84   for (Int_t i=0; i<24; i++){
85     TGraph* grEff = param ->GetPMTeff(i);
86     fEffPMT.AddAtAndExpand(grEff,i);
87   }
88 }
89 //_____________________________________________________________________________
90
91 AliT0v1::~AliT0v1() 
92 {
93   // desctructor  
94 }
95
96 //-------------------------------------------------------------------------
97 void AliT0v1::CreateGeometry()
98 {
99   //
100   // Create the geometry of T0 Detector version 0
101   //
102   // begin Html
103   /*
104    <img src="gif/AliT0v0.gif">
105   */
106   //
107
108
109    Int_t *idtmed = fIdtmed->GetArray();
110    /*
111    AliT0Parameters* param = AliT0Parameters::Instance();
112    param->Init();
113   Float_t zdetC = param->GetZposition(0);
114   Float_t zdetA = param->GetZposition(1);
115    */
116    Float_t zdetC = 69.7;
117    Float_t zdetA = 373.;
118
119   Int_t is;
120   Int_t idrotm[999];
121   Float_t x,y,z;
122   //C T0 mother volume
123   Float_t pstartR[18]={0., 360., 5., 
124                        -6.8, 4.25, 10., //-76.5+0.00+69.7
125                        -0.75 , 4.5, 10.,  // -76.5+6.05+69.7
126                        1.25   , 4.5, 10.,  //-76.5+8.05+69.7
127                        1.25 , 5.1, 10., //-76.5+8.05+69.7 
128                        6.8 , 5.1, 10.};  //-62.9+0.00+69.7
129   
130   Float_t pstart[3]={4., 12.5,6.8};
131   Float_t pinstart[3]={0.,1.6,6.5};
132   Float_t ppmt[3]={0.,1.5,3.5};
133   Float_t ptop[3]={0.,1.,1.0};
134   Float_t preg[3]={0., 1.0, 0.005}; //photcathode dobavil bogdanov
135   Float_t ptopout[3]={1.,1.01, 1.};  //metal air around raiator for photos reflection 
136   Float_t pbot[3]={0.6,1.2,0.1};
137   Float_t pglass[3]={1.2,1.3,2.};
138   Float_t pcer[3]={0.9,1.1,1.35};
139   Float_t psteel[3]={0.9,1.1,0.15};
140   Float_t psupport1[3] = {4.51,4.6,4.0};//C kozhuh vnutri
141   Float_t psupport2[3] = {9.4,9.5,4.0};// snaruzhi  C
142   Float_t psupport3[3] = {4.51,9.5,0.05};//kryshki  C
143   Float_t psupport5[3] = {1.44,1.5,6.5}; // stakanchik dlai feu  C
144   Float_t psupport6[3] = {0,1.4,0.04}; //kryshechka stakanchika  Al
145   Float_t psupport7[3] = {1.5,1.6,0.4}; //kolechko snaruzhu stakanchika Al
146    
147   // Mother Volume katushka dlia krepezha vokrug truby k Absorbru
148     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
149   Float_t ppcon[70]; 
150     ppcon[0]  =   0;
151     ppcon[1]  = 360;
152     ppcon[2]  =  13;
153 //  1: 
154     ppcon[3]  =  7.2;
155     ppcon[4]  =   4.4;
156     ppcon[5]  =   4.5;
157 //  2
158     ppcon[6]  = 8.2;
159     ppcon[7]  = 4.4;
160     ppcon[8]  = 4.5;
161 //  3
162     ppcon[9]  = 8.2;
163     ppcon[10] = 4.4;
164     ppcon[11] = 5.1;
165
166 //  4
167
168     ppcon[12] = 8.3; 
169     ppcon[13] = 4.4;
170     ppcon[14] = 5.1;
171 //  5
172
173     ppcon[15] = 8.3;
174     ppcon[16] = 4.9;
175     ppcon[17] = 5.1;
176     
177 //  6
178     ppcon[18] = 15.; 
179     ppcon[19] = 4.9;
180     ppcon[20] = 5.1;
181     
182 //  7
183     ppcon[21] = 15.; 
184     ppcon[22] = 3.15  ;
185     ppcon[23] = 5.1;
186
187 /// 8
188     ppcon[24] = 15.01; 
189     ppcon[25] = 3.15;
190     ppcon[26] = 5.1;
191
192 /// 9
193     ppcon[27] = 15.01; 
194     ppcon[28] = 3.15;
195     ppcon[29] = 3.25;
196
197     
198 /// 9
199      ppcon[30] = 19.71;
200      ppcon[31] = 3.15;
201      ppcon[32] = 3.25; 
202 //  10
203     ppcon[33] = 19.8; 
204     ppcon[34] = 3.15;
205     ppcon[35] = 3.25;
206     //  11
207     ppcon[36] = 19.8;
208     ppcon[37] = 3.15;
209     ppcon[38] = 7.6;
210         
211    //  14
212
213     ppcon[39] =  19.91;
214     ppcon[40] =  3.15;
215     ppcon[41] =  7.6;
216
217
218     gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,42);
219     z = -zdetC;
220     gMC->Gspos("0SUP",1,"ALIC",0.,0.,z,idrotm[901],"ONLY");
221    
222 //-------------------------------------------------------------------
223  //  T0 volume 
224  //-------------------------------------------------------------------
225   
226     
227     gMC->Gsvolu("0STR","PCON",idtmed[kAir],pstartR,18);
228     gMC->Gspos("0STR",1,"ALIC",0.,0.,-zdetC+pstartR[3],idrotm[901],"ONLY");
229     // gMC->Gspos("0STL",1,"ALIC",0.,0.,zdetA+pstart[2],0,"ONLY");
230
231 //T0 interior
232    gMC->Gsvolu("0INS","TUBE",idtmed[kAir],pinstart,3);
233    gMC->Gsvolu("0PMT","TUBE",idtmed[kAir],ppmt,3);     
234           
235     gMC->Gsvolu("0SU1","TUBE",idtmed[kC],psupport1,3);//C kozhuh vnutri
236     gMC->Gsvolu("0SU2","TUBE",idtmed[kC],psupport2,3);// snaruzhi  C
237     gMC->Gsvolu("0SU3","TUBE",idtmed[kC],psupport3,3);//kryshka perednaiai  C
238     gMC->Gsvolu("0SU4","TUBE",idtmed[kC],psupport3,3);//kryshka zadnaiai  C
239     //    gMC->Gsvolu("0SU5","TUBE",idtmed[kAir],psupport4,3);// dyrki dlia feu v zadnej kryshke Air
240     gMC->Gsvolu("0SU6","TUBE",idtmed[kC],psupport5,3);// stakanchik dlai feu  C
241     gMC->Gsvolu("0SU7","TUBE",idtmed[kAl],psupport6,3);//kryshechka stakanchika  Al
242     gMC->Gsvolu("0SU8","TUBE",idtmed[kAl],psupport7,3);//kolechko snaruzhu stakanchika Al
243    
244  
245
246    //non-absorber side support  and T0A !!!!!!!!
247     
248     TGeoPgon * supPgon = new TGeoPgon("supPgon",0.,360.,360,4);
249     supPgon->DefineSection(0, 0, 4.1, 5.5);
250     supPgon->DefineSection(1, 10.5 , 4.1, 5.5);
251     supPgon->DefineSection(2, 10.5 , 4.1, 4.9);
252     supPgon->DefineSection(3, 12.5 , 4.1, 4.9);
253     TGeoTranslation *trPgon = new TGeoTranslation("trPgon",0,0,0);
254     trPgon->RegisterYourself();
255  
256     TGeoVolumeAssembly * stlin = new TGeoVolumeAssembly("0STL");//empty segment
257     TGeoVolume *ins = gGeoManager->GetVolume("0INS");
258
259     //   Double_t phimin = TMath::ACos((16-4.8)/16.) * (180 / TMath::Pi()) ;
260     //  TGeoTubeSeg *hole = new TGeoTubeSeg("hole", 0, 1.6, 0, -phimin+90, phimin+90);
261     new TGeoTube("hole", 0, 1.61, 6.5);
262     TGeoTranslation *tr [12];
263     Float_t angle  = 2 * TMath::Pi() / 12;
264     Char_t nameTr[40];
265     for (Int_t itr=0; itr<12; itr++) {
266       sprintf (nameTr,"tr%i",itr+1);
267       x = 6.5 * TMath::Sin(itr * angle);
268       y = 6.5 * TMath::Cos(itr * angle);
269       tr[itr] = new TGeoTranslation(nameTr,x,y,6.5);
270       tr[itr]->RegisterYourself();
271        stlin->AddNode(ins,itr+13,tr[itr]);
272     }
273     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)");
274   
275     TGeoMedium *medal = gGeoManager->GetMedium("T0_Aluminium$");
276     TGeoVolume *supA = new TGeoVolume("0SUA",supsh,medal);
277     stlin->AddNode(supA,1,new TGeoTranslation(0,0,0));
278  
279     TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
280     alice->AddNode(stlin,1,new TGeoTranslation(0,0, zdetA ));
281             
282     // T0A finished
283
284     //T0C 
285 // first ring: 12 units of Scintillator+PMT+divider
286   Float_t  theta  = (180 / TMath::Pi()) * TMath::ATan(6.5 / zdetC);
287   Float_t phi[3];
288    for (is=0; is<12; is++)
289       {  
290
291         x = 6.5 * TMath::Sin(is * angle);
292         y = 6.5 * TMath::Cos(is * angle);
293         
294         phi[0] = -30 * is;
295         phi[1] = 90 - is * 30;
296         phi[2] = 90 - is * 30;
297         for (Int_t j = 0; j < 3; j++)
298           if (phi[j] < 0)  phi[j] += 360;
299         
300         AliMatrix (idrotm[902 + is], 90.,         phi[0],
301                    90. + theta, phi[1],
302                    theta,       phi[2]);  
303         z=-pstart[2]+pinstart[2]+0.2;
304         gMC->Gspos ("0INS", is + 1, "0STR", x, y, z, idrotm[902 + is], "ONLY");
305   }     
306      
307    x=0;
308    y=0;
309     z=-pinstart[2]+ppmt[2]+psupport6[2]*2;
310    gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
311    // PMT
312    
313    // Entry window (glass)
314    gMC->Gsvolu("0TOP","TUBE",idtmed[kOpGlass],ptop,3); //glass
315    z=-ppmt[2]+ptop[2];
316    gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
317    //"metal" air volume to simulate reclection  
318    gMC->Gsvolu("0TOO","TUBE",idtmed[kOpAir],ptopout,3); 
319    gMC->Gspos("0TOO",1,"0PMT",0,0,z,0,"ONLY");
320
321    //Fotokatod
322    gMC->Gsvolu ("0REG", "TUBE", idtmed[kOpGlassCathode], preg, 3); 
323    z = -ppmt[2] + 2 * ptop[2] + preg[2]; 
324    gMC->Gspos ("0REG", 1, "0PMT", 0, 0, z, 0, "ONLY"); 
325   // Bottom glass
326    gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
327    z=ppmt[2]-pbot[2];
328    gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
329    // Side cylinder glass
330    gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
331    z=ppmt[2]-pglass[2];
332    gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
333    //PMT electrodes support structure
334    gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
335    gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
336    z=-ppmt[2]+2*ptop[2]+0.3 + pcer[2];
337    gMC->Gspos("0CER",1,"0PMT",0,0,z,0,"ONLY");
338    z +=psteel[2]+pcer[2];
339    gMC->Gspos("0STE",1,"0PMT",0,0,z,0,"ONLY");
340     
341    //Support absorber (C) side
342    z=-pstart[2]+psupport1[2]+0.1;
343    gMC->Gspos("0SU1",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
344    gMC->Gspos("0SU2",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh vnutri
345    z=-pstart[2]+psupport3[2]+0.1;
346    gMC->Gspos("0SU3",1,"0STR",0,0,z,0,"ONLY"); //peredniaia kryshka
347    z=-pstart[2]+2.*psupport1[2]-0.05;//+0.1;
348    gMC->Gspos("0SU4",1,"0STR",0,0,z,0,"MANY"); //zadnaiai kryshka
349    gMC->Gspos("0SU6",1,"0INS",0,0,0,0,"ONLY");//C stakanchik dlia feu 
350    z=-pinstart[2]+psupport6[2];
351    gMC->Gspos("0SU7",1,"0INS",0,0,z,0,"ONLY"); //Al kryshechka 
352    
353    z=pinstart[2]-psupport7[2];
354    gMC->Gspos("0SU8",1,"0INS",0,0,z,0,"ONLY"); //Al kolechko
355    
356    
357    Float_t par[3];
358    par[0]=4.4;
359    par[1]=4.5;
360    par[2]=0.5;
361    gMC->Gsvolu("0SC0","TUBE",idtmed[kC],par,3);
362    z=ppcon[3]+par[2];
363    gMC->Gspos("0SC0",1,"0SUP",0,0,z,0,"ONLY"); 
364    z += par[2];
365    par[0]=4.4;
366    par[1]=5.1;
367    par[2]=0.05;
368    gMC->Gsvolu("0SC1","TUBE",idtmed[kC],par,3);
369    z += par[2];
370    gMC->Gspos("0SC1",1,"0SUP",0,0,z,0,"ONLY"); 
371    z=z+par[2];
372    par[0]=4.9;
373    par[1]=5.0;
374    par[2]=6.7/2;
375     gMC->Gsvolu("0SC2","TUBE",idtmed[kC],par,3);
376     z += par[2];
377     gMC->Gspos("0SC2",1,"0SUP",0,0,z,0,"ONLY"); 
378     z += par[2];
379    
380     par[0]=3.15;
381     par[1]=4.9;
382     par[2]=0.1/2;
383     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
384     
385     z += par[2];
386     gMC->Gspos("0SA1",1,"0SUP",0,0,z,0,"ONLY"); 
387     z=z+par[2];
388     par[0]=3.15;
389     par[1]=3.16;
390     par[2]=4.7/2;
391     gMC->Gsvolu("0SA2","TUBE",idtmed[kAl],par,3);
392     z += par[2];
393     gMC->Gspos("0SA2",1,"0SUP",0,0,z,0,"ONLY"); 
394     z=z+par[2];
395     par[0]=3.16; // eta chast' prikruchena k absorberu
396     par[1]=7.5;
397     par[2]=0.1;
398     gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
399     z += par[2];
400     gMC->Gspos("0SA3",1,"0SUP",0,0,z,0,"ONLY"); 
401     par[0]=3.16; // gvozdi eta chast' prikruchena k absorberu
402     par[1]=7.5;
403     par[2]=0.01;
404     gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
405     gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"ONLY"); 
406  
407    
408
409  
410 }    
411 //------------------------------------------------------------------------
412 void AliT0v1::AddAlignableVolumes() const
413 {
414   //
415   // Create entries for alignable volumes associating the symbolic volume
416   // name with the corresponding volume path. Needs to be syncronized with
417   // eventual changes in the geometry.
418   //
419
420   TString volPath;
421   TString symName, sn;
422
423   TString vpA  = "/ALIC_1/0STL_1/0INS_";
424   TString vpC  = "/ALIC_1/0STR_1/0INS_";
425   TString vpInside  = "/0PMT_1/0TOP_1";
426
427   for (Int_t imod=0; imod<24; imod++)
428     {
429       if (imod < 12) 
430         {volPath  = vpC; sn="T0/C/PMT";} 
431      else  
432        {volPath  = vpA; sn="T0/A/PMT";}
433       volPath += imod+1;
434       volPath += vpInside;
435       
436       symName = sn;
437       symName += imod+1;
438       
439       AliDebug(2,"--------------------------------------------");
440       AliDebug(2,Form("Alignable object %d", imod));
441       AliDebug(2,Form("volPath=%s\n",volPath.Data()));
442       AliDebug(2,Form("symName=%s\n",symName.Data()));
443       AliDebug(2,"--------------------------------------------");
444       if(!gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data()))
445         AliFatal(Form("Alignable entry %s not created. Volume path %s not valid",   symName.Data(),volPath.Data()));
446       
447     }
448 }   
449 //------------------------------------------------------------------------
450 void AliT0v1::CreateMaterials()
451 {
452    Int_t isxfld   = gAlice->Field()->Integ();
453    Float_t sxmgmx = gAlice->Field()->Max();
454    //   Float_t a,z,d,radl,absl,buf[1];
455    // Int_t nbuf;
456 // AIR
457                                                                                 
458    Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
459    Float_t zAir[4]={6.,7.,8.,18.};
460    Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
461    Float_t dAir = 1.20479E-3;
462                                                                                 
463 // Scintillator CH
464    Float_t ascin[2]={1.01,12.01};
465    Float_t zscin[2]={1,6};
466    Float_t wscin[2]={1,1};
467    Float_t denscin=1.03;
468 //Lucite C(CH3)CO2CH3
469    Float_t alucite[3]={1.01,12.01,15.999};
470    Float_t zlucite[3]={1,6,8};
471    Float_t wlucite[3]={8,5,2};
472    Float_t denlucite=1.16;
473  // PMT glass SiO2
474    Float_t aglass[2]={28.0855,15.9994};
475    Float_t zglass[2]={14.,8.};
476    Float_t wglass[2]={1.,2.};
477    Float_t dglass=2.65;
478 // Ceramic   97.2% Al2O3 , 2.8% SiO2
479    // Float_t wcer[2]={0.972,0.028};
480    Float_t aCeramic[2]  = { 26.981539,15.9994 };
481    Float_t zCeramic[2]  = { 13.,8. };
482    Float_t wCeramic[2]  = { 2.,3. };
483    Float_t denscer  = 3.6;
484
485 // Brass 80% Cu, 20% Zn
486    Float_t abrass[2] = {63.546,65.39};
487    Float_t zbrass[2] = {29,30};
488    Float_t wbrass[2] = {0.8,0.2};
489    Float_t denbrass=8.96;
490
491 //Ribber C6H12S
492    Float_t aribber[3] = {12.,1.,32.};
493    Float_t zribber[3] = {6.,1.,16.};
494    Float_t wribber[3] = {6.,12.,1.};
495    Float_t denribber=0.8;
496 // Support inside 
497    Float_t asupport[2] = {12.,1.};
498    Float_t zsupport[2] = {6.,1.};
499    Float_t wsupport[2] = {1.,1.};
500    Float_t densupport=0.1;
501     
502 //*** Definition Of avaible T0 materials ***
503    AliMaterial(0, "Steel$", 55.850,26.,7.87,1.76,999);
504    AliMaterial(1, "Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
505    AliMixture(2, "Air$", aAir, zAir, dAir,4,wAir);
506    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999); 
507    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999); 
508
509    AliMixture( 3, "Ceramic  $",aCeramic, zCeramic, denscer, -2, wCeramic);
510    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
511    /* 
512   char namate[21]="";
513   
514    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
515    acer[0]=a;  
516
517    zcer[0]=z;
518    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
519    acer[1]=a;
520    zcer[1]=z;
521    AliMixture( 11, "Ceramic    $", acer, zcer, denscer, 2, wcer);
522    */ 
523     AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
524    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
525    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
526    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
527    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
528    AliMixture( 21, "PMT Optical glass   $",aglass,zglass,dglass,-2,wglass);
529    AliMixture( 24, "PMT Optical glass cathode $",aglass,zglass,dglass,-2,wglass);
530     AliMixture(22, "T0 Opt Air$", aAir, zAir, dAir,4,wAir);
531    AliMixture(23, "T0 Opt Air Next$", aAir, zAir, dAir,4,wAir);
532    
533    AliMedium(1, "T0 Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
534    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
535    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
536    AliMedium(4, "Ceramic$", 3, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
537    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
538    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
539    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
540    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
541    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
542    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
543    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
544    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);  
545    AliMedium(16, "OpticalGlass$", 21, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
546    AliMedium(17, "T0 OpAir$", 22, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
547    AliMedium(18, "T0 OpAirNext$", 23, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
548     AliMedium(19, "OpticalGlassCathode$", 24, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
549    
550    AliDebugClass(1,": ++++++++++++++Medium set++++++++++");
551    
552    
553 }
554 //---------------------------------------------------------------------
555 void AliT0v1::DrawDetector()
556 {
557 //
558 // Draw a shaded view of the Forward multiplicity detector version 0
559 //
560   
561   //Set ALIC mother transparent
562   gMC->Gsatt("ALIC","SEEN",0);
563   //
564   //Set volumes visible
565   //  gMC->Gsatt("0STR","SEEN",0);
566   //  gMC->Gsatt("0INS","SEEN",0);
567   // gMC->Gsatt("0PMT","SEEN",1);
568   // gMC->Gsatt("0DIV","SEEN",1);
569   //
570   gMC->Gdopt("hide","off");
571   gMC->Gdopt("shad","on");
572   gMC->SetClipBox(".");
573   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
574   gMC->DefaultRange();
575   gMC->Gdraw("alic",90,0,0,-35,9.5,.6,0.6);
576   //gMC->Gdraw("alic",0,0,0,10,9.5,.8,0.8); //other side view
577   gMC->Gdhead(1111,"T-Zero detector");
578   gMC->Gdopt("hide","off");
579 }
580
581 //-------------------------------------------------------------------
582 void AliT0v1::DefineOpticalProperties()
583 {
584 // Optical properties definition.
585    Int_t *idtmed = fIdtmed->GetArray();
586 // Definition Cherenkov parameters
587    int i;
588    const Int_t kNbins=31;
589    
590    Float_t rindexSiO2[kNbins],  efficAll[kNbins], rindexAir[kNbins], absorAir[kNbins],rindexCathodeNext[kNbins], absorbCathodeNext[kNbins];
591             
592    // quartz 20mm
593    Float_t aAbsSiO2[kNbins]={29.0, 28.6, 28.3, 27.7, 27.3, 26.7, 26.4, 
594                              25.9, 25.3, 24.9, 24.5, 23.7, 
595                              23.2, 22.8, 22.4, 21.8, 21.3,
596                              22.8, 22.1, 21.7, 21.2, 20.5, 
597                              19.9, 19.3, 18.7, 18.0, 17.1, 
598                              16.3, 15.3, 14.3, 14.3   };
599           
600    Float_t aPckov[kNbins]  ={3.87, 3.94, 4.02, 4.11, 4.19, 4.29, 4.38,
601                              4.48, 4.58, 4.69, 4.81, 4.93, 
602                              5.05, 5.19, 5.33, 5.48, 5.63,
603                              5.8,  5.97, 6.16, 6.36, 6.57, 
604                              6.8,  7.04, 7.3,  7.58, 7.89, 
605                              8.22, 8.57, 8.97, 9.39 };  
606    /*     
607    Float_t effCathode[kNbins]={0.11, 0.13, 0.15, 0.16, 0.18, 0.19, 0.20,
608                               0.21, 0.22, 0.23, 0.24, 0.26, 
609                               0.27, 0.29, 0.30, 0.29, 0.29, 
610                               0.28, 0.28, 0.27, 0.26, 0.25, 
611                               0.25, 0.23, 0.20, 0.19, 0.17,
612                               0.17, 0.17, 0.2, 0.23};
613    */     
614    //  Float_t aAbsSiO2[kNbins]; //quartz 30mm
615   for(i=0;i<kNbins;i++)
616     {
617       aPckov[i]=aPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV   
618       rindexAir[i]=0;
619       rindexSiO2[i]=1.458; //refractive index for qwarts
620       rindexCathodeNext[i]=0;
621       efficAll[i]=1.;
622
623       //      aAbsSiO2[i]=28.5; //quartz 30mm
624       absorAir[i]=0.3;      
625       absorbCathodeNext[i]=0;
626
627     }
628   
629   
630    gMC->SetCerenkov (idtmed[kOpGlass], kNbins, aPckov, aAbsSiO2, efficAll, rindexSiO2 );
631    // gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2, effCathode, rindexSiO2 );
632    gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2,efficAll , rindexSiO2 );
633   gMC->SetCerenkov (idtmed[kOpAir], kNbins, aPckov,absorAir , efficAll,rindexAir );
634    gMC->SetCerenkov (idtmed[kOpAirNext], kNbins, aPckov,absorbCathodeNext , efficAll, rindexCathodeNext);
635 }
636
637 //-------------------------------------------------------------------
638 void AliT0v1::Init()
639 {
640 // Initialises version 0 of the Forward Multiplicity Detector
641 //
642   AliT0::Init();
643   fIdSens1=gMC->VolId("0REG");
644
645    AliDebug(1,Form("%s: *** T0 version 1 initialized ***\n",ClassName()));
646 }
647
648 //-------------------------------------------------------------------
649
650 void AliT0v1::StepManager()
651 {
652   //
653   // Called for every step in the T0 Detector
654   //
655   Int_t id,copy,copy1;
656   static Float_t hits[6];
657   static Int_t vol[2];
658   TLorentzVector pos;
659   
660   //   TClonesArray &lhits = *fHits;
661   
662   if(!gMC->IsTrackAlive()) return; // particle has disappeared
663   
664   
665     // If particles is photon then ...
666   
667  if (gMC->TrackPid() == 50000050)
668   {
669       id=gMC->CurrentVolID(copy);
670       
671       
672       // Check the sensetive volume
673       if(id==fIdSens1 ) { 
674         if(gMC->IsTrackEntering()) {
675             gMC->CurrentVolOffID(2,copy);
676             vol[1]=copy;
677             gMC->CurrentVolOffID(3,copy1);
678             vol[0]=copy1;
679             gMC->TrackPosition(pos);
680             hits[0] = pos[0];
681             hits[1] = pos[1];
682             hits[2] = pos[2];
683             if(pos[2]<0) vol[0]=2;
684             if(pos[2]>=0) vol[0]=1; 
685             
686             Float_t etot=gMC->Etot();
687             hits[3]=etot;
688             Int_t iPart= gMC->TrackPid();
689             Int_t partID=gMC->IdFromPDG(iPart);
690             hits[4]=partID;
691             Float_t ttime=gMC->TrackTime();
692             hits[5]=ttime*1e12;
693             if(RegisterPhotoE(vol[1]-1,hits[3])) 
694               AddHit(fIshunt,vol,hits);
695             
696           }
697           //  cout<< gAlice->GetMCApp()->GetCurrentTrackNumber()<<" hit added "<<endl;
698         
699         /*              
700                 printf("track(%i) alive(%i) disap(%i) enter(%i) exit(%i) inside(%i) out(%i) stop(%i) new(%i) \n",
701                        gAlice->GetMCApp()->GetCurrentTrackNumber(),
702                gMC->IsTrackAlive(),
703                gMC->IsTrackDisappeared(),
704                gMC->IsTrackEntering(),
705                gMC->IsTrackExiting(),
706                gMC->IsTrackInside(),
707                gMC->IsTrackOut(),
708                gMC->IsTrackStop(),
709                gMC->IsNewTrack());
710         */              
711       } //sensitive
712   } //photon
713 }
714
715
716
717 //------------------------------------------------------------------------
718 Bool_t AliT0v1::RegisterPhotoE(Int_t ipmt,Double_t energy)
719 {
720
721   
722   //  Float_t hc=197.326960*1.e6; //mev*nm
723   Double_t hc=1.973*1.e-6; //gev*nm
724   Float_t lambda=hc/energy;
725   Float_t eff = ((TGraph*) fEffPMT.At(ipmt))->Eval(lambda);
726   Double_t  p = gRandom->Rndm();
727
728   if (p > eff)
729     return kFALSE;
730   
731   return kTRUE;
732 }
733
734 //----------------------------------------------------------------------------
735
736
737
738
739
740