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