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   *
   9  * without fee, provided that the above copyright notice appears in all   *
  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.,1.6,6.5};
 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] = {4.51,4.6,4.0};//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] = {1.44,1.5,6.5}; // stakanchik dlai feu  C
 145   Float_t psupport6[3] = {0,1.4,0.04}; //kryshechka stakanchika  Al
 146   Float_t psupport7[3] = {1.5,1.6,0.4}; //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 = 6.5 * TMath::Sin(is * angle);
 293         y = 6.5 * 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]+0.1;
 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