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 "TGeoPcon.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   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     for (Int_t itr=0; itr<12; itr++) {
 267       sprintf (nameTr,"0TR%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("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)");
 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(6.6 / zdetC);
 288   Float_t phi[3];
 289    for (is=0; is<12; is++)
 290       {
 291
 292         x = 6.6 * TMath::Sin(is * angle);
 293         y = 6.6 * TMath::Cos(is * angle);
 294
 295         phi[0] = -30 * is;
 296         phi[1] = 90 - is * 30;
 297         phi[2] = 90 - is * 30;
 298         for (Int_t j = 0; j < 3; j++)
 299           if (phi[j] < 0)  phi[j] += 360;
 300
 301         AliMatrix (idrotm[902 + is], 90.,         phi[0],
 302                    90. + theta, phi[1],
 303                    theta,       phi[2]);
 304         z=-pstart[2]+pinstart[2]+0.3;
 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    z=-pinstart[2]+ppmt[2]+0.08; //+psupport6[2];
 312    gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
 313    // PMT
 314
 315    // Entry window (glass)
 316    gMC->Gsvolu("0TOP","TUBE",idtmed[kOpGlass],ptop,3); //glass
 317    z=-ppmt[2]+ptop[2];
 318    gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
 319    //"metal" air volume to simulate reclection
 320    gMC->Gsvolu("0TOO","TUBE",idtmed[kOpAir],ptopout,3);
 321    gMC->Gspos("0TOO",1,"0PMT",0,0,z,0,"ONLY");
 322
 323    //Fotokatod
 324    gMC->Gsvolu ("0REG", "TUBE", idtmed[kOpGlassCathode], preg, 3);
 325    z = -ppmt[2] + 2 * ptop[2] + preg[2];
 326    gMC->Gspos ("0REG", 1, "0PMT", 0, 0, z, 0, "ONLY");
 327   // Bottom glass
 328    gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
 329    z=ppmt[2]-pbot[2];
 330    gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
 331    // Side cylinder glass
 332    gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
 333    z=ppmt[2]-pglass[2];
 334    gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
 335    //PMT electrodes support structure
 336    gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
 337    gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
 338    z=-ppmt[2]+2*ptop[2]+0.3 + pcer[2];
 339    gMC->Gspos("0CER",1,"0PMT",0,0,z,0,"ONLY");
 340    z +=psteel[2]+pcer[2];
 341    gMC->Gspos("0STE",1,"0PMT",0,0,z,0,"ONLY");
 342
 343    //Support absorber (C) side
 344    z=-pstart[2]+psupport1[2];//  0.05; //0.1;
 345    gMC->Gspos("0SU1",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
 346    gMC->Gspos("0SU2",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh vnutri
 347    z=-pstart[2]+psupport3[2];//  - 0.1;
 348    gMC->Gspos("0SU3",1,"0STR",0,0,z,0,"ONLY"); //peredniaia kryshka
 349    z=-pstart[2]+2.*psupport1[2];//+0.1;
 350    gMC->Gspos("0SU4",1,"0STR",0,0,z,0,"MANY"); //zadnaiai kryshka
 351    gMC->Gspos("0SU6",1,"0INS",0,0,0,0,"ONLY");//C stakanchik dlia feu
 352    z=-pinstart[2]+psupport6[2]; //-0.1;
 353    gMC->Gspos("0SU7",1,"0INS",0,0,z,0,"ONLY"); //Al kryshechka
 354
 355    z=pinstart[2]-psupport7[2];
 356    gMC->Gspos("0SU8",1,"0SU6",0,0,z,0,"ONLY"); //Al kolechko
 357
 358
 359    Float_t par[3];
 360    par[0]=4.4;
 361    par[1]=4.5;
 362    par[2]=0.5;
 363    gMC->Gsvolu("0SC0","TUBE",idtmed[kC],par,3);
 364    z=ppcon[3]+par[2];
 365    gMC->Gspos("0SC0",1,"0SUP",0,0,z,0,"ONLY");
 366    z += par[2];
 367    par[0]=4.4;
 368    par[1]=5.1;
 369    par[2]=0.05;
 370    gMC->Gsvolu("0SC1","TUBE",idtmed[kC],par,3);
 371    z += par[2];
 372    gMC->Gspos("0SC1",1,"0SUP",0,0,z,0,"ONLY");
 373    z=z+par[2];
 374    par[0]=4.9;
 375    par[1]=5.0;
 376    par[2]=6.7/2;
 377     gMC->Gsvolu("0SC2","TUBE",idtmed[kC],par,3);
 378     z += par[2];
 379     gMC->Gspos("0SC2",1,"0SUP",0,0,z,0,"ONLY");
 380     z += par[2];
 381
 382     par[0]=3.15;
 383     par[1]=4.9;
 384     par[2]=0.01/2;
 385
 386     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
 387
 388      z += par[2];
 389      //  z -= par[2];
 390     gMC->Gspos("0SA1",1,"0SUP",0,0,z,0,"ONLY");
 391     z=z+par[2];
 392     par[0]=3.15;
 393     par[1]=3.16;
 394     par[2]=4.7/2;
 395     gMC->Gsvolu("0SA2","TUBE",idtmed[kAl],par,3);
 396     z += par[2];
 397     gMC->Gspos("0SA2",1,"0SUP",0,0,z,0,"ONLY");
 398     z=z+par[2];
 399     par[0]=3.16; // eta chast' prikruchena k absorberu
 400     par[1]=7.4;
 401     par[2]=0.01;
 402     gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
 403     //   z += par[2];
 404    z = ppcon[39] - par[2];
 405     gMC->Gspos("0SA3",1,"0SUP",0,0,z,0,"ONLY");
 406     par[0]=3.16; // gvozdi eta chast' prikruchena k absorberu
 407     par[1]=7.4;
 408     par[2]=0.01;
 409     gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
 410     gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"MANY");
 411
 412
 413
 414
 415 }
 416 //------------------------------------------------------------------------
 417 void AliT0v1::AddAlignableVolumes() const
 418 {
 419   //
 420   // Create entries for alignable volumes associating the symbolic volume
 421   // name with the corresponding volume path. Needs to be syncronized with
 422   // eventual changes in the geometry.
 423   //
 424
 425   // TString volPath;
 426   // TString symName, sn;
 427
 428
 429
 430
 431   TString volPath;
 432   TString symName, sn;
 433
 434   TString vpA  = "/ALIC_1/0STL_1/0INS_";
 435   TString vpC  = "/ALIC_1/0STR_1/0INS_";
 436   TString vpInside  = "/0PMT_1/0TOP_1";
 437   TString vpAalign = "/ALIC_1/0STL_1";
 438   TString vpCalign = "/ALIC_1/0STR_1";
 439
 440   for (Int_t imod=0; imod<26; imod++)
 441     {
 442       if (imod < 24)
 443       {
 444        if (imod < 12)
 445          { volPath  = vpC; sn="T0/C/PMT";}
 446         else
 447           { volPath  = vpA; sn="T0/A/PMT";}
 448       volPath += imod+1;
 449       volPath += vpInside;
 450       symName = sn;
 451      symName += imod+1;
 452      }
 453      else if (imod == 24)
 454        {volPath  = vpCalign; symName="/ALIC_1/0STR_1";}
 455      else
 456        {volPath  = vpAalign; symName="/ALIC_1/0STL_1";}
 457
 458       AliDebug(2,"--------------------------------------------");
 459       AliDebug(2,Form("Alignable object %d", imod));
 460       AliDebug(2,Form("volPath=%s\n",volPath.Data()));
 461       AliDebug(2,Form("symName=%s\n",symName.Data()));
 462       AliDebug(2,"--------------------------------------------");
 463       if(!gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data()))
 464        AliFatal(Form("Alignable entry %s not created. Volume path %s not valid",
 465 symName.Data(),volPath.Data()));
 466    }
 467   /*
 468   for (Int_t imod=0; imod<24; imod++)
 469     {
 470        if (imod < 12)
 471          { volPath  = vpC; sn="T0/C/PMT";}
 472         else
 473           { volPath  = vpA; sn="T0/A/PMT";}
 474       volPath += imod+1;
 475       volPath += vpInside;
 476       symName = sn;
 477       symName += imod+1;
 478
 479
 480       AliDebug(2,"--------------------------------------------");
 481       AliDebug(2,Form("Alignable object %d", imod));
 482       AliDebug(2,Form("volPath=%s\n",volPath.Data()));
 483       AliDebug(2,Form("symName=%s\n",symName.Data()));
 484       AliDebug(2,"--------------------------------------------");
 485       if(!gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data()))
 486        AliFatal(Form("Alignable entry %s not created. Volume path %s not valid",
 487 symName.Data(),volPath.Data()));
 488    }
 489   */
 490 }
 491 //------------------------------------------------------------------------
 492 void AliT0v1::CreateMaterials()
 493 {
 494    Int_t isxfld   = gAlice->Field()->Integ();
 495    Float_t sxmgmx = gAlice->Field()->Max();
 496    //   Float_t a,z,d,radl,absl,buf[1];
 497    // Int_t nbuf;
 498 // AIR
 499
 500    Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
 501    Float_t zAir[4]={6.,7.,8.,18.};
 502    Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 503    Float_t dAir = 1.20479E-3;
 504
 505 // Scintillator CH
 506    Float_t ascin[2]={1.01,12.01};
 507    Float_t zscin[2]={1,6};
 508    Float_t wscin[2]={1,1};
 509    Float_t denscin=1.03;
 510 //Lucite C(CH3)CO2CH3
 511    Float_t alucite[3]={1.01,12.01,15.999};
 512    Float_t zlucite[3]={1,6,8};
 513    Float_t wlucite[3]={8,5,2};
 514    Float_t denlucite=1.16;
 515  // PMT glass SiO2
 516    Float_t aglass[2]={28.0855,15.9994};
 517    Float_t zglass[2]={14.,8.};
 518    Float_t wglass[2]={1.,2.};
 519    Float_t dglass=2.65;
 520 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 521    // Float_t wcer[2]={0.972,0.028};
 522    Float_t aCeramic[2]  = { 26.981539,15.9994 };
 523    Float_t zCeramic[2]  = { 13.,8. };
 524    Float_t wCeramic[2]  = { 2.,3. };
 525    Float_t denscer  = 3.6;
 526
 527 // Brass 80% Cu, 20% Zn
 528    Float_t abrass[2] = {63.546,65.39};
 529    Float_t zbrass[2] = {29,30};
 530    Float_t wbrass[2] = {0.8,0.2};
 531    Float_t denbrass=8.96;
 532
 533 //Ribber C6H12S
 534    Float_t aribber[3] = {12.,1.,32.};
 535    Float_t zribber[3] = {6.,1.,16.};
 536    Float_t wribber[3] = {6.,12.,1.};
 537    Float_t denribber=0.8;
 538 // Support inside
 539    Float_t asupport[2] = {12.,1.};
 540    Float_t zsupport[2] = {6.,1.};
 541    Float_t wsupport[2] = {1.,1.};
 542    Float_t densupport=0.1;
 543
 544 //*** Definition Of avaible T0 materials ***
 545    AliMaterial(0, "Steel$", 55.850,26.,7.87,1.76,999);
 546    AliMaterial(1, "Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 547    AliMixture(2, "Air$", aAir, zAir, dAir,4,wAir);
 548    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999);
 549    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999);
 550
 551    AliMixture( 3, "Ceramic  $",aCeramic, zCeramic, denscer, -2, wCeramic);
 552    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 553    /*
 554   char namate[21]="";
 555
 556    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 557    acer[0]=a;
 558
 559    zcer[0]=z;
 560    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 561    acer[1]=a;
 562    zcer[1]=z;
 563    AliMixture( 11, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 564    */
 565     AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 566    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 567    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 568    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
 569    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
 570    AliMixture( 21, "PMT Optical glass   $",aglass,zglass,dglass,-2,wglass);
 571    AliMixture( 24, "PMT Optical glass cathode $",aglass,zglass,dglass,-2,wglass);
 572     AliMixture(22, "T0 Opt Air$", aAir, zAir, dAir,4,wAir);
 573    AliMixture(23, "T0 Opt Air Next$", aAir, zAir, dAir,4,wAir);
 574
 575    AliMedium(1, "T0 Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 576    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 577    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 578    AliMedium(4, "Ceramic$", 3, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 579    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 580    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 581    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 582    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 583    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 584    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 585    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 586    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 587    AliMedium(16, "OpticalGlass$", 21, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 588    AliMedium(17, "T0 OpAir$", 22, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 589    AliMedium(18, "T0 OpAirNext$", 23, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 590     AliMedium(19, "OpticalGlassCathode$", 24, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 591
 592    AliDebugClass(1,": ++++++++++++++Medium set++++++++++");
 593
 594
 595 }
 596 //---------------------------------------------------------------------
 597 void AliT0v1::DrawDetector()
 598 {
 599 //
 600 // Draw a shaded view of the Forward multiplicity detector version 0
 601 //
 602
 603   //Set ALIC mother transparent
 604   gMC->Gsatt("ALIC","SEEN",0);
 605   //
 606   //Set volumes visible
 607   //  gMC->Gsatt("0STR","SEEN",0);
 608   //  gMC->Gsatt("0INS","SEEN",0);
 609   // gMC->Gsatt("0PMT","SEEN",1);
 610   // gMC->Gsatt("0DIV","SEEN",1);
 611   //
 612   gMC->Gdopt("hide","off");
 613   gMC->Gdopt("shad","on");
 614   gMC->SetClipBox(".");
 615   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 616   gMC->DefaultRange();
 617   gMC->Gdraw("alic",90,0,0,-35,9.5,.6,0.6);
 618   //gMC->Gdraw("alic",0,0,0,10,9.5,.8,0.8); //other side view
 619   gMC->Gdhead(1111,"T-Zero detector");
 620   gMC->Gdopt("hide","off");
 621 }
 622
 623 //-------------------------------------------------------------------
 624 void AliT0v1::DefineOpticalProperties()
 625 {
 626 // Optical properties definition.
 627    Int_t *idtmed = fIdtmed->GetArray();
 628 // Definition Cherenkov parameters
 629    int i;
 630    const Int_t kNbins=31;
 631
 632    Float_t rindexSiO2[kNbins],  efficAll[kNbins], rindexAir[kNbins], absorAir[kNbins],rindexCathodeNext[kNbins], absorbCathodeNext[kNbins];
 633
 634    // quartz 20mm
 635    Float_t aAbsSiO2[kNbins]={29.0, 28.6, 28.3, 27.7, 27.3, 26.7, 26.4,
 636                              25.9, 25.3, 24.9, 24.5, 23.7,
 637                              23.2, 22.8, 22.4, 21.8, 21.3,
 638                              22.8, 22.1, 21.7, 21.2, 20.5,
 639                              19.9, 19.3, 18.7, 18.0, 17.1,
 640                              16.3, 15.3, 14.3, 14.3   };
 641
 642    Float_t aPckov[kNbins]  ={3.87, 3.94, 4.02, 4.11, 4.19, 4.29, 4.38,
 643                              4.48, 4.58, 4.69, 4.81, 4.93,
 644                              5.05, 5.19, 5.33, 5.48, 5.63,
 645                              5.8,  5.97, 6.16, 6.36, 6.57,
 646                              6.8,  7.04, 7.3,  7.58, 7.89,
 647                              8.22, 8.57, 8.97, 9.39 };
 648    /*
 649    Float_t effCathode[kNbins]={0.11, 0.13, 0.15, 0.16, 0.18, 0.19, 0.20,
 650                               0.21, 0.22, 0.23, 0.24, 0.26,
 651                               0.27, 0.29, 0.30, 0.29, 0.29,
 652                               0.28, 0.28, 0.27, 0.26, 0.25,
 653                               0.25, 0.23, 0.20, 0.19, 0.17,
 654                               0.17, 0.17, 0.2, 0.23};
 655    */
 656    //  Float_t aAbsSiO2[kNbins]; //quartz 30mm
 657   for(i=0;i<kNbins;i++)
 658     {
 659       aPckov[i]=aPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV
 660       rindexAir[i]=0;
 661       rindexSiO2[i]=1.458; //refractive index for qwarts
 662       rindexCathodeNext[i]=0;
 663       efficAll[i]=1.;
 664
 665       //      aAbsSiO2[i]=28.5; //quartz 30mm
 666       absorAir[i]=0.3;
 667       absorbCathodeNext[i]=0;
 668
 669     }
 670
 671
 672    gMC->SetCerenkov (idtmed[kOpGlass], kNbins, aPckov, aAbsSiO2, efficAll, rindexSiO2 );
 673    // gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2, effCathode, rindexSiO2 );
 674    gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2,efficAll , rindexSiO2 );
 675   gMC->SetCerenkov (idtmed[kOpAir], kNbins, aPckov,absorAir , efficAll,rindexAir );
 676    gMC->SetCerenkov (idtmed[kOpAirNext], kNbins, aPckov,absorbCathodeNext , efficAll, rindexCathodeNext);
 677 }
 678
 679 //-------------------------------------------------------------------
 680 void AliT0v1::Init()
 681 {
 682 // Initialises version 0 of the Forward Multiplicity Detector
 683 //
 684   AliT0::Init();
 685   fIdSens1=gMC->VolId("0REG");
 686
 687    AliDebug(1,Form("%s: *** T0 version 1 initialized ***\n",ClassName()));
 688 }
 689
 690 //-------------------------------------------------------------------
 691
 692 void AliT0v1::StepManager()
 693 {
 694   //
 695   // Called for every step in the T0 Detector
 696   //
 697   Int_t id,copy,copy1;
 698   static Float_t hits[6];
 699   static Int_t vol[2];
 700   TLorentzVector pos;
 701
 702   //   TClonesArray &lhits = *fHits;
 703
 704   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 705
 706
 707     // If particles is photon then ...
 708
 709  if (gMC->TrackPid() == 50000050)
 710   {
 711       id=gMC->CurrentVolID(copy);
 712
 713
 714       // Check the sensetive volume
 715       if(id==fIdSens1 ) {
 716         if(gMC->IsTrackEntering()) {
 717             gMC->CurrentVolOffID(2,copy);
 718             vol[1]=copy;
 719             gMC->CurrentVolOffID(3,copy1);
 720             vol[0]=copy1;
 721             gMC->TrackPosition(pos);
 722             hits[0] = pos[0];
 723             hits[1] = pos[1];
 724             hits[2] = pos[2];
 725             if(pos[2]<0) vol[0]=2;
 726             if(pos[2]>=0) vol[0]=1;
 727
 728             Float_t etot=gMC->Etot();
 729             hits[3]=etot;
 730             Int_t iPart= gMC->TrackPid();
 731             Int_t partID=gMC->IdFromPDG(iPart);
 732             hits[4]=partID;
 733             Float_t ttime=gMC->TrackTime();
 734             hits[5]=ttime*1e12;
 735             if(RegisterPhotoE(vol[1]-1,hits[3]))
 736               AddHit(fIshunt,vol,hits);
 737
 738           }
 739           //  cout<< gAlice->GetMCApp()->GetCurrentTrackNumber()<<" hit added "<<endl;
 740
 741         /*
 742                 printf("track(%i) alive(%i) disap(%i) enter(%i) exit(%i) inside(%i) out(%i) stop(%i) new(%i) \n",
 743                        gAlice->GetMCApp()->GetCurrentTrackNumber(),
 744                gMC->IsTrackAlive(),
 745                gMC->IsTrackDisappeared(),
 746                gMC->IsTrackEntering(),
 747                gMC->IsTrackExiting(),
 748                gMC->IsTrackInside(),
 749                gMC->IsTrackOut(),
 750                gMC->IsTrackStop(),
 751                gMC->IsNewTrack());
 752         */
 753       } //sensitive
 754   } //photon
 755 }
 756
 757
 758
 759 //------------------------------------------------------------------------
 760 Bool_t AliT0v1::RegisterPhotoE(Int_t ipmt,Double_t energy)
 761 {
 762
 763
 764   //  Float_t hc=197.326960*1.e6; //mev*nm
 765   Double_t hc=1.973*1.e-6; //gev*nm
 766   Float_t lambda=hc/energy;
 767   Float_t eff = ((TGraph*) fEffPMT.At(ipmt))->Eval(lambda);
 768   Double_t  p = gRandom->Rndm();
 769
 770   if (p > eff)
 771     return kFALSE;
 772
 773   return kTRUE;
 774 }
 775
 776 //----------------------------------------------------------------------------
 777
 778
 779
 780
 781
 782