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 "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
  45 #include "AliLog.h"
  46 #include "AliMagF.h"
  47 #include "AliRun.h"
  48
  49 #include "AliT0hit.h"
  50 #include "AliT0v1.h"
  51 #include "AliT0Parameters.h"
  52
  53 #include "AliMC.h"
  54 #include "AliCDBLocal.h"
  55 #include "AliCDBStorage.h"
  56 #include "AliCDBManager.h"
  57 #include "AliCDBEntry.h"
  58 #include "AliTrackReference.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   Double_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 , 4.45, 10.,  // -76.5+6.05+69.7
 126                        //  1.25   , 4.45, 10.,  //-76.5+8.05+69.7
 127                        -0.75 , 4.5, 10.,  // -76.5+6.05+69.7
 128                        1.25   , 4.5, 10.,  //-76.5+8.05+69.7
 129                        1.25 , 5.1, 10, //-76.5+8.05+69.7
 130                        6.8 , 5.1, 10.};  //-62.9+0.00+69.7
 131
 132   Float_t pstart[3]={4., 12.5,6.8};
 133   Float_t pinstart[3]={0.,1.45,6.5};
 134   Float_t ppmt[3]={0.,1.4,3.5};
 135   Float_t ptop[3]={0.,1.,1.0};
 136   Float_t preg[3]={0., 1.0, 0.005}; //photcathode dobavil bogdanov
 137   Float_t ptopout[3]={1.,1.01, 1.};  //metal air around raiator for photos reflection
 138   Float_t pbot[3]={0.6,1.2,0.1};
 139   Float_t pglass[3]={1.2,1.3,2.};
 140   Float_t pcer[3]={0.9,1.1,1.35};
 141   Float_t psteel[3]={0.9,1.1,0.15};
 142   Float_t psupport1[3] = {4.51,4.52,4.0};//C kozhuh vnutri
 143   Float_t psupport2[3] = {9.5,9.6,4.0};// snaruzhi  C
 144   Float_t psupport3[3] = {4.52,9.5, 0.05};//kryshki  C
 145   Float_t psupport5[3] = {1.44,1.45,6.5}; // stakanchik dlai feu  C
 146   Float_t psupport6[3] = {0,1.4,0.04}; //kryshechka stakanchika  Al
 147   Float_t psupport7[3] = {1.44,1.45,0.4}; //kolechko snaruzhu stakanchika Al
 148
 149   // Mother Volume katushka dlia krepezha vokrug truby k Absorbru
 150     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
 151   Float_t ppcon[70];
 152     ppcon[0]  =   0;
 153     ppcon[1]  = 360;
 154     ppcon[2]  =  13;
 155 //  1:
 156     ppcon[3]  =  7.2;
 157     ppcon[4]  =   4.4;
 158     ppcon[5]  =   4.5;
 159 //  2
 160     ppcon[6]  = 8.2;
 161     ppcon[7]  = 4.4;
 162     ppcon[8]  = 4.5;
 163 //  3
 164     ppcon[9]  = 8.2;
 165     ppcon[10] = 4.4;
 166     ppcon[11] = 5.1;
 167
 168 //  4
 169
 170     ppcon[12] = 8.3;
 171     ppcon[13] = 4.4;
 172     ppcon[14] = 5.1;
 173 //  5
 174
 175     ppcon[15] = 8.3;
 176     ppcon[16] = 4.9;
 177     ppcon[17] = 5.1;
 178
 179 //  6
 180     ppcon[18] = 15.;
 181     ppcon[19] = 4.9;
 182     ppcon[20] = 5.1;
 183
 184 //  7
 185     ppcon[21] = 15.;
 186     ppcon[22] = 3.15  ;
 187     ppcon[23] = 5.1;
 188
 189 /// 8
 190     ppcon[24] = 15.01;
 191     ppcon[25] = 3.15;
 192     ppcon[26] = 5.1;
 193
 194 /// 9
 195     ppcon[27] = 15.01;
 196     ppcon[28] = 3.15;
 197     ppcon[29] = 3.25;
 198
 199
 200 /// 9
 201      ppcon[30] = 19.71;
 202      ppcon[31] = 3.15;
 203      ppcon[32] = 3.25;
 204 //  10
 205     ppcon[33] = 19.8;
 206     ppcon[34] = 3.15;
 207     ppcon[35] = 3.25;
 208     //  11
 209     ppcon[36] = 19.8;
 210     ppcon[37] = 3.15;
 211     ppcon[38] = 7.6;
 212
 213    //  14
 214
 215     ppcon[39] =  19.99;
 216     ppcon[40] =  3.15;
 217     ppcon[41] =  7.6;
 218
 219
 220     gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,42);
 221     z = -zdetC;
 222     gMC->Gspos("0SUP",1,"ALIC",0.,0.,z,idrotm[901],"ONLY");
 223
 224 //-------------------------------------------------------------------
 225  //  T0 volume
 226  //-------------------------------------------------------------------
 227
 228
 229     gMC->Gsvolu("0STR","PCON",idtmed[kAir],pstartR,18);
 230     gMC->Gspos("0STR",1,"ALIC",0.,0.,-zdetC+pstartR[3],idrotm[901],"ONLY");
 231     // gMC->Gspos("0STL",1,"ALIC",0.,0.,zdetA+pstart[2],0,"ONLY");
 232
 233 //T0 interior
 234    gMC->Gsvolu("0INS","TUBE",idtmed[kAir],pinstart,3);
 235    gMC->Gsvolu("0PMT","TUBE",idtmed[kAir],ppmt,3);
 236
 237     gMC->Gsvolu("0SU1","TUBE",idtmed[kC],psupport1,3);//C kozhuh vnutri
 238     gMC->Gsvolu("0SU2","TUBE",idtmed[kC],psupport2,3);// snaruzhi  C
 239     gMC->Gsvolu("0SU3","TUBE",idtmed[kC],psupport3,3);//kryshka perednaiai  C
 240     gMC->Gsvolu("0SU4","TUBE",idtmed[kC],psupport3,3);//kryshka zadnaiai  C
 241     //    gMC->Gsvolu("0SU5","TUBE",idtmed[kAir],psupport4,3);// dyrki dlia feu v zadnej kryshke Air
 242     gMC->Gsvolu("0SU6","TUBE",idtmed[kC],psupport5,3);// stakanchik dlai feu  C
 243     gMC->Gsvolu("0SU7","TUBE",idtmed[kAl],psupport6,3);//kryshechka stakanchika  Al
 244     gMC->Gsvolu("0SU8","TUBE",idtmed[kAl],psupport7,3);//kolechko snaruzhu stakanchika Al
 245
 246
 247
 248    //non-absorber side support  and T0A !!!!!!!!
 249
 250     TGeoPcon * supPgon = new TGeoPcon("0supPgon",0.,360.,4);
 251     supPgon->DefineSection(0, 0, 4.1, 5.5);
 252     supPgon->DefineSection(1, 10.5 , 4.1, 5.5);
 253     supPgon->DefineSection(2, 10.5 , 4.1, 4.9);
 254     supPgon->DefineSection(3, 12.5 , 4.1, 4.9);
 255     TGeoTranslation *trPgon = new TGeoTranslation("0trPgon",0,0,0);
 256     trPgon->RegisterYourself();
 257
 258     TGeoVolumeAssembly * stlin = new TGeoVolumeAssembly("0STL");//empty segment
 259     TGeoVolume *ins = gGeoManager->GetVolume("0INS");
 260
 261     new TGeoTube("0HOLE", 0, 1.51, 6.5);
 262     TGeoTranslation *tr [12];
 263     Double_t angle  = 2 * TMath::Pi() / 12;
 264     Char_t nameTr[40];
 265     for (Int_t itr=0; itr<12; itr++) {
 266       sprintf (nameTr,"0TR%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("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)");
 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(6.6 / zdetC);
 287   Float_t phi[3];
 288    for (is=0; is<12; is++)
 289       {
 290
 291         x = 6.6 * TMath::Sin(is * angle);
 292         y = 6.6 * 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]+0.3;
 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    z=-pinstart[2]+ppmt[2]+0.08; //+psupport6[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];//  0.05; //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];//+0.1;
 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]; //-0.1;
 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,"0SU6",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]=0.01/2;
 384
 385     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
 386
 387      z += par[2];
 388      //  z -= par[2];
 389     gMC->Gspos("0SA1",1,"0SUP",0,0,z,0,"ONLY");
 390     z=z+par[2];
 391     par[0]=3.15;
 392     par[1]=3.16;
 393     par[2]=4.7/2;
 394     gMC->Gsvolu("0SA2","TUBE",idtmed[kAl],par,3);
 395     z += par[2];
 396     gMC->Gspos("0SA2",1,"0SUP",0,0,z,0,"ONLY");
 397     z=z+par[2];
 398     par[0]=3.16; // eta chast' prikruchena k absorberu
 399     par[1]=7.4;
 400     par[2]=0.01;
 401     gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
 402     //   z += par[2];
 403    z = ppcon[39] - par[2];
 404     gMC->Gspos("0SA3",1,"0SUP",0,0,z,0,"ONLY");
 405     par[0]=3.16; // gvozdi eta chast' prikruchena k absorberu
 406     par[1]=7.4;
 407     par[2]=0.01;
 408     gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
 409     gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"MANY");
 410
 411
 412
 413
 414 }
 415 //------------------------------------------------------------------------
 416 void AliT0v1::AddAlignableVolumes() const
 417 {
 418   //
 419   // Create entries for alignable volumes associating the symbolic volume
 420   // name with the corresponding volume path. Needs to be syncronized with
 421   // eventual changes in the geometry.
 422   //
 423
 424   // TString volPath;
 425   // TString symName, sn;
 426
 427
 428
 429
 430   TString volPath;
 431   TString symName, sn;
 432
 433   TString vpA  = "/ALIC_1/0STL_1/0INS_";
 434   TString vpC  = "/ALIC_1/0STR_1/0INS_";
 435   TString vpInside  = "/0PMT_1/0TOP_1";
 436   TString vpAalign = "/ALIC_1/0STL_1";
 437   TString vpCalign = "/ALIC_1/0STR_1";
 438
 439   for (Int_t imod=0; imod<26; imod++)
 440     {
 441       if (imod < 24)
 442       {
 443        if (imod < 12)
 444          { volPath  = vpC; sn="T0/C/PMT";}
 445         else
 446           { volPath  = vpA; sn="T0/A/PMT";}
 447       volPath += imod+1;
 448       volPath += vpInside;
 449       symName = sn;
 450      symName += imod+1;
 451      }
 452      else if (imod == 24)
 453        {volPath  = vpCalign; symName="/ALIC_1/0STR_1";}
 454      else
 455        {volPath  = vpAalign; symName="/ALIC_1/0STL_1";}
 456
 457       AliDebug(2,"--------------------------------------------");
 458       AliDebug(2,Form("Alignable object %d", imod));
 459       AliDebug(2,Form("volPath=%s\n",volPath.Data()));
 460       AliDebug(2,Form("symName=%s\n",symName.Data()));
 461       AliDebug(2,"--------------------------------------------");
 462       if(!gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data()))
 463        AliFatal(Form("Alignable entry %s not created. Volume path %s not valid",
 464 symName.Data(),volPath.Data()));
 465    }
 466 }
 467 //------------------------------------------------------------------------
 468 void AliT0v1::CreateMaterials()
 469 {
 470    Int_t isxfld   = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Integ();
 471    Float_t sxmgmx = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Max();
 472    //   Float_t a,z,d,radl,absl,buf[1];
 473    // Int_t nbuf;
 474 // AIR
 475
 476    Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
 477    Float_t zAir[4]={6.,7.,8.,18.};
 478    Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 479    Float_t dAir = 1.20479E-3;
 480
 481 // Scintillator CH
 482    Float_t ascin[2]={1.01,12.01};
 483    Float_t zscin[2]={1,6};
 484    Float_t wscin[2]={1,1};
 485    Float_t denscin=1.03;
 486 //Lucite C(CH3)CO2CH3
 487    Float_t alucite[3]={1.01,12.01,15.999};
 488    Float_t zlucite[3]={1,6,8};
 489    Float_t wlucite[3]={8,5,2};
 490    Float_t denlucite=1.16;
 491  // PMT glass SiO2
 492    Float_t aglass[2]={28.0855,15.9994};
 493    Float_t zglass[2]={14.,8.};
 494    Float_t wglass[2]={1.,2.};
 495    Float_t dglass=2.65;
 496 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 497    // Float_t wcer[2]={0.972,0.028};
 498    Float_t aCeramic[2]  = { 26.981539,15.9994 };
 499    Float_t zCeramic[2]  = { 13.,8. };
 500    Float_t wCeramic[2]  = { 2.,3. };
 501    Float_t denscer  = 3.6;
 502
 503 // Brass 80% Cu, 20% Zn
 504    Float_t abrass[2] = {63.546,65.39};
 505    Float_t zbrass[2] = {29,30};
 506    Float_t wbrass[2] = {0.8,0.2};
 507    Float_t denbrass=8.96;
 508
 509 //Ribber C6H12S
 510    Float_t aribber[3] = {12.,1.,32.};
 511    Float_t zribber[3] = {6.,1.,16.};
 512    Float_t wribber[3] = {6.,12.,1.};
 513    Float_t denribber=0.8;
 514 // Support inside
 515    Float_t asupport[2] = {12.,1.};
 516    Float_t zsupport[2] = {6.,1.};
 517    Float_t wsupport[2] = {1.,1.};
 518    Float_t densupport=0.1;
 519
 520 //*** Definition Of avaible T0 materials ***
 521    AliMaterial(0, "Steel$", 55.850,26.,7.87,1.76,999);
 522    AliMaterial(1, "Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 523    AliMixture(2, "Air$", aAir, zAir, dAir,4,wAir);
 524    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999);
 525    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999);
 526
 527    AliMixture( 3, "Ceramic  $",aCeramic, zCeramic, denscer, -2, wCeramic);
 528    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 529    /*
 530   char namate[21]="";
 531
 532    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 533    acer[0]=a;
 534
 535    zcer[0]=z;
 536    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 537    acer[1]=a;
 538    zcer[1]=z;
 539    AliMixture( 11, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 540    */
 541     AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 542    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 543    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 544    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
 545    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
 546    AliMixture( 21, "PMT Optical glass   $",aglass,zglass,dglass,-2,wglass);
 547    AliMixture( 24, "PMT Optical glass cathode $",aglass,zglass,dglass,-2,wglass);
 548     AliMixture(22, "T0 Opt Air$", aAir, zAir, dAir,4,wAir);
 549    AliMixture(23, "T0 Opt Air Next$", aAir, zAir, dAir,4,wAir);
 550
 551    AliMedium(1, "T0 Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 552    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 553    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 554    AliMedium(4, "Ceramic$", 3, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 555    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 556    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 557    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 558    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 559    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 560    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 561    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 562    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 563    AliMedium(16, "OpticalGlass$", 21, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 564    AliMedium(17, "T0 OpAir$", 22, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 565    AliMedium(18, "T0 OpAirNext$", 23, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 566     AliMedium(19, "OpticalGlassCathode$", 24, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 567
 568    AliDebugClass(1,": ++++++++++++++Medium set++++++++++");
 569
 570
 571 }
 572 //---------------------------------------------------------------------
 573 void AliT0v1::DrawDetector()
 574 {
 575 //
 576 // Draw a shaded view of the Forward multiplicity detector version 0
 577 //
 578
 579   //Set ALIC mother transparent
 580   gMC->Gsatt("ALIC","SEEN",0);
 581   //
 582   //Set volumes visible
 583   //  gMC->Gsatt("0STR","SEEN",0);
 584   //  gMC->Gsatt("0INS","SEEN",0);
 585   // gMC->Gsatt("0PMT","SEEN",1);
 586   // gMC->Gsatt("0DIV","SEEN",1);
 587   //
 588   gMC->Gdopt("hide","off");
 589   gMC->Gdopt("shad","on");
 590   gMC->SetClipBox(".");
 591   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 592   gMC->DefaultRange();
 593   gMC->Gdraw("alic",90,0,0,-35,9.5,.6,0.6);
 594   //gMC->Gdraw("alic",0,0,0,10,9.5,.8,0.8); //other side view
 595   gMC->Gdhead(1111,"T-Zero detector");
 596   gMC->Gdopt("hide","off");
 597 }
 598
 599 //-------------------------------------------------------------------
 600 void AliT0v1::DefineOpticalProperties()
 601 {
 602 // Optical properties definition.
 603    Int_t *idtmed = fIdtmed->GetArray();
 604 // Definition Cherenkov parameters
 605    int i;
 606    const Int_t kNbins=31;
 607
 608    Float_t rindexSiO2[kNbins],  efficAll[kNbins], rindexAir[kNbins], absorAir[kNbins],rindexCathodeNext[kNbins], absorbCathodeNext[kNbins];
 609
 610    // quartz 20mm
 611    Float_t aAbsSiO2[kNbins]={29.0, 28.6, 28.3, 27.7, 27.3, 26.7, 26.4,
 612                              25.9, 25.3, 24.9, 24.5, 23.7,
 613                              23.2, 22.8, 22.4, 21.8, 21.3,
 614                              22.8, 22.1, 21.7, 21.2, 20.5,
 615                              19.9, 19.3, 18.7, 18.0, 17.1,
 616                              16.3, 15.3, 14.3, 14.3   };
 617
 618    Float_t aPckov[kNbins]  ={3.87, 3.94, 4.02, 4.11, 4.19, 4.29, 4.38,
 619                              4.48, 4.58, 4.69, 4.81, 4.93,
 620                              5.05, 5.19, 5.33, 5.48, 5.63,
 621                              5.8,  5.97, 6.16, 6.36, 6.57,
 622                              6.8,  7.04, 7.3,  7.58, 7.89,
 623                              8.22, 8.57, 8.97, 9.39 };
 624    /*
 625    Float_t effCathode[kNbins]={0.11, 0.13, 0.15, 0.16, 0.18, 0.19, 0.20,
 626                               0.21, 0.22, 0.23, 0.24, 0.26,
 627                               0.27, 0.29, 0.30, 0.29, 0.29,
 628                               0.28, 0.28, 0.27, 0.26, 0.25,
 629                               0.25, 0.23, 0.20, 0.19, 0.17,
 630                               0.17, 0.17, 0.2, 0.23};
 631    */
 632    //  Float_t aAbsSiO2[kNbins]; //quartz 30mm
 633   for(i=0;i<kNbins;i++)
 634     {
 635       aPckov[i]=aPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV
 636       rindexAir[i]=0;
 637       rindexSiO2[i]=1.458; //refractive index for qwarts
 638       rindexCathodeNext[i]=0;
 639       efficAll[i]=1.;
 640
 641       //      aAbsSiO2[i]=28.5; //quartz 30mm
 642       absorAir[i]=0.3;
 643       absorbCathodeNext[i]=0;
 644
 645     }
 646
 647
 648    gMC->SetCerenkov (idtmed[kOpGlass], kNbins, aPckov, aAbsSiO2, efficAll, rindexSiO2 );
 649    // gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2, effCathode, rindexSiO2 );
 650    gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2,efficAll , rindexSiO2 );
 651   gMC->SetCerenkov (idtmed[kOpAir], kNbins, aPckov,absorAir , efficAll,rindexAir );
 652    gMC->SetCerenkov (idtmed[kOpAirNext], kNbins, aPckov,absorbCathodeNext , efficAll, rindexCathodeNext);
 653 }
 654
 655 //-------------------------------------------------------------------
 656 void AliT0v1::Init()
 657 {
 658 // Initialises version 0 of the Forward Multiplicity Detector
 659 //
 660   AliT0::Init();
 661   fIdSens1=gMC->VolId("0REG");
 662
 663    AliDebug(1,Form("%s: *** T0 version 1 initialized ***\n",ClassName()));
 664 }
 665
 666 //-------------------------------------------------------------------
 667
 668 void AliT0v1::StepManager()
 669 {
 670   //
 671   // Called for every step in the T0 Detector
 672   //
 673   Int_t id,copy,copy1;
 674   static Float_t hits[6];
 675   static Int_t vol[2];
 676   TLorentzVector pos;
 677   TLorentzVector mom;
 678
 679   //   TClonesArray &lhits = *fHits;
 680
 681   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 682
 683   id=gMC->CurrentVolID(copy);
 684
 685   // Check the sensetive volume
 686   if(id==fIdSens1 ) {
 687     if(gMC->IsTrackEntering()) {
 688       gMC->CurrentVolOffID(2,copy);
 689       vol[1]=copy;
 690       gMC->CurrentVolOffID(3,copy1);
 691       vol[0]=copy1;
 692       gMC->TrackPosition(pos);
 693       hits[0] = pos[0];
 694       hits[1] = pos[1];
 695       hits[2] = pos[2];
 696       if(pos[2]<0) vol[0] = 2;
 697       if(pos[2]>=0) vol[0] = 1;
 698
 699       Float_t etot=gMC->Etot();
 700       hits[3]=etot;
 701       Int_t iPart= gMC->TrackPid();
 702       Int_t partID=gMC->IdFromPDG(iPart);
 703       hits[4]=partID;
 704       Float_t ttime=gMC->TrackTime();
 705       hits[5]=ttime*1e12;
 706       if (gMC->TrackPid() == 50000050)   // If particles is photon then ...
 707         {
 708           if(RegisterPhotoE(vol[1]-1,hits[3])) {
 709             AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(),vol,hits);
 710             // Create a track reference at the exit of photocatode
 711           }
 712         }
 713
 714       //charge particle
 715       if ( gMC->TrackCharge() )
 716         AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kT0);
 717
 718         /*
 719                 printf("track(%i) alive(%i) disap(%i) enter(%i) exit(%i) inside(%i) out(%i) stop(%i) new(%i) \n",
 720                        gAlice->GetMCApp()->GetCurrentTrackNumber(),
 721                gMC->IsTrackAlive(),
 722                gMC->IsTrackDisappeared(),
 723                gMC->IsTrackEntering(),
 724                gMC->IsTrackExiting(),
 725                gMC->IsTrackInside(),
 726                gMC->IsTrackOut(),
 727                gMC->IsTrackStop(),
 728                gMC->IsNewTrack());
 729         */
 730     }// trck entering
 731   } //sensitive
 732
 733 }
 734
 735
 736
 737 //------------------------------------------------------------------------
 738 Bool_t AliT0v1::RegisterPhotoE(Int_t ipmt,Double_t energy)
 739 {
 740
 741
 742   //  Float_t hc=197.326960*1.e6; //mev*nm
 743   Double_t hc=1.973*1.e-6; //gev*nm
 744   Float_t lambda=hc/energy;
 745   Float_t eff = ((TGraph*) fEffPMT.At(ipmt))->Eval(lambda);
 746   Double_t  p = gRandom->Rndm();
 747
 748   if (p > eff)
 749     return kFALSE;
 750
 751   return kTRUE;
 752 }
 753
 754 //----------------------------------------------------------------------------
 755
 756
 757
 758
 759
 760