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 #include <TString.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 #include "AliTrackReference.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     TString nameTr;
 267     for (Int_t itr=0; itr<12; itr++) {
 268       //      sprintf (nameTr,"0TR%i",itr+1);
 269       nameTr = Form("0TR%i",itr+1);
 270       x = 6.5 * TMath::Sin(itr * angle);
 271       y = 6.5 * TMath::Cos(itr * angle);
 272       tr[itr] = new TGeoTranslation(nameTr.Data(),x,y,6.5);
 273       tr[itr]->RegisterYourself();
 274       stlin->AddNode(ins,itr+13,tr[itr]);
 275     }
 276     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)");
 277
 278     TGeoMedium *medal = gGeoManager->GetMedium("T0_Aluminium$");
 279     TGeoVolume *supA = new TGeoVolume("0SUA",supsh,medal);
 280     stlin->AddNode(supA,1,new TGeoTranslation(0,0,0));
 281
 282     TGeoVolume *alice = gGeoManager->GetVolume("ALIC");
 283     alice->AddNode(stlin,1,new TGeoTranslation(0,0, zdetA ));
 284
 285     // T0A finished
 286
 287     //T0C
 288 // first ring: 12 units of Scintillator+PMT+divider
 289   Float_t  theta  = (180 / TMath::Pi()) * TMath::ATan(6.6 / zdetC);
 290   Float_t phi[3];
 291    for (is=0; is<12; is++)
 292       {
 293
 294         x = 6.6 * TMath::Sin(is * angle);
 295         y = 6.6 * TMath::Cos(is * angle);
 296
 297         phi[0] = -30 * is;
 298         phi[1] = 90 - is * 30;
 299         phi[2] = 90 - is * 30;
 300         for (Int_t j = 0; j < 3; j++)
 301           if (phi[j] < 0)  phi[j] += 360;
 302
 303         AliMatrix (idrotm[902 + is], 90.,         phi[0],
 304                    90. + theta, phi[1],
 305                    theta,       phi[2]);
 306         z=-pstart[2]+pinstart[2]+0.3;
 307         gMC->Gspos ("0INS", is + 1, "0STR", x, y, z, idrotm[902 + is], "ONLY");
 308   }
 309
 310    x=0;
 311    y=0;
 312    //   z=-pinstart[2]+ppmt[2]+psupport6[2]*2;
 313    z=-pinstart[2]+ppmt[2]+0.08; //+psupport6[2];
 314    gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
 315    // PMT
 316
 317    // Entry window (glass)
 318    gMC->Gsvolu("0TOP","TUBE",idtmed[kOpGlass],ptop,3); //glass
 319    z=-ppmt[2]+ptop[2];
 320    gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
 321    //"metal" air volume to simulate reclection
 322    gMC->Gsvolu("0TOO","TUBE",idtmed[kOpAir],ptopout,3);
 323    gMC->Gspos("0TOO",1,"0PMT",0,0,z,0,"ONLY");
 324
 325    //Fotokatod
 326    gMC->Gsvolu ("0REG", "TUBE", idtmed[kOpGlassCathode], preg, 3);
 327    z = -ppmt[2] + 2 * ptop[2] + preg[2];
 328    gMC->Gspos ("0REG", 1, "0PMT", 0, 0, z, 0, "ONLY");
 329   // Bottom glass
 330    gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
 331    z=ppmt[2]-pbot[2];
 332    gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
 333    // Side cylinder glass
 334    gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
 335    z=ppmt[2]-pglass[2];
 336    gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
 337    //PMT electrodes support structure
 338    gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
 339    gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
 340    z=-ppmt[2]+2*ptop[2]+0.3 + pcer[2];
 341    gMC->Gspos("0CER",1,"0PMT",0,0,z,0,"ONLY");
 342    z +=psteel[2]+pcer[2];
 343    gMC->Gspos("0STE",1,"0PMT",0,0,z,0,"ONLY");
 344
 345    //Support absorber (C) side
 346    z=-pstart[2]+psupport1[2];//  0.05; //0.1;
 347    gMC->Gspos("0SU1",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
 348    gMC->Gspos("0SU2",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh vnutri
 349    z=-pstart[2]+psupport3[2];//  - 0.1;
 350    gMC->Gspos("0SU3",1,"0STR",0,0,z,0,"ONLY"); //peredniaia kryshka
 351    z=-pstart[2]+2.*psupport1[2];//+0.1;
 352    gMC->Gspos("0SU4",1,"0STR",0,0,z,0,"MANY"); //zadnaiai kryshka
 353    gMC->Gspos("0SU6",1,"0INS",0,0,0,0,"ONLY");//C stakanchik dlia feu
 354    z=-pinstart[2]+psupport6[2]; //-0.1;
 355    gMC->Gspos("0SU7",1,"0INS",0,0,z,0,"ONLY"); //Al kryshechka
 356
 357    z=pinstart[2]-psupport7[2];
 358    //  gMC->Gspos("0SU8",1,"0SU6",0,0,z,0,"ONLY"); //Al kolechko
 359
 360
 361    Float_t par[3];
 362    par[0]=4.4;
 363    par[1]=4.5;
 364    par[2]=0.5;
 365    gMC->Gsvolu("0SC0","TUBE",idtmed[kC],par,3);
 366    z=ppcon[3]+par[2];
 367    gMC->Gspos("0SC0",1,"0SUP",0,0,z,0,"ONLY");
 368    z += par[2];
 369    par[0]=4.4;
 370    par[1]=5.1;
 371    par[2]=0.05;
 372    gMC->Gsvolu("0SC1","TUBE",idtmed[kC],par,3);
 373    z += par[2];
 374    gMC->Gspos("0SC1",1,"0SUP",0,0,z,0,"ONLY");
 375    z=z+par[2];
 376    par[0]=4.9;
 377    par[1]=5.0;
 378    par[2]=6.7/2;
 379     gMC->Gsvolu("0SC2","TUBE",idtmed[kC],par,3);
 380     z += par[2];
 381     gMC->Gspos("0SC2",1,"0SUP",0,0,z,0,"ONLY");
 382     z += par[2];
 383
 384     par[0]=3.15;
 385     par[1]=4.9;
 386     par[2]=0.01/2;
 387
 388     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
 389
 390      z += par[2];
 391      //  z -= par[2];
 392     gMC->Gspos("0SA1",1,"0SUP",0,0,z,0,"ONLY");
 393     z=z+par[2];
 394     par[0]=3.15;
 395     par[1]=3.16;
 396     par[2]=4.7/2;
 397     gMC->Gsvolu("0SA2","TUBE",idtmed[kAl],par,3);
 398     z += par[2];
 399     gMC->Gspos("0SA2",1,"0SUP",0,0,z,0,"ONLY");
 400     z=z+par[2];
 401     par[0]=3.16; // eta chast' prikruchena k absorberu
 402     par[1]=7.4;
 403     par[2]=0.01;
 404     gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
 405     //   z += par[2];
 406    z = ppcon[39] - par[2];
 407     gMC->Gspos("0SA3",1,"0SUP",0,0,z,0,"ONLY");
 408     par[0]=3.16; // gvozdi eta chast' prikruchena k absorberu
 409     par[1]=7.4;
 410     par[2]=0.01;
 411     gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
 412     gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"MANY");
 413
 414
 415
 416
 417 }
 418 //------------------------------------------------------------------------
 419 void AliT0v1::AddAlignableVolumes() const
 420 {
 421   //
 422   // Create entries for alignable volumes associating the symbolic volume
 423   // name with the corresponding volume path. Needs to be syncronized with
 424   // eventual changes in the geometry.
 425   //
 426
 427   // TString volPath;
 428   // TString symName, sn;
 429
 430
 431
 432
 433   TString volPath;
 434   TString symName, sn;
 435
 436   TString vpA  = "/ALIC_1/0STL_1/0INS_";
 437   TString vpC  = "/ALIC_1/0STR_1/0INS_";
 438   TString vpInside  = "/0PMT_1/0TOP_1";
 439   TString vpAalign = "/ALIC_1/0STL_1";
 440   TString vpCalign = "/ALIC_1/0STR_1";
 441
 442   for (Int_t imod=0; imod<26; imod++)
 443     {
 444       if (imod < 24)
 445       {
 446        if (imod < 12)
 447          { volPath  = vpC; sn="T0/C/PMT";}
 448         else
 449           { volPath  = vpA; sn="T0/A/PMT";}
 450       volPath += imod+1;
 451       volPath += vpInside;
 452       symName = sn;
 453      symName += imod+1;
 454      }
 455      else if (imod == 24)
 456        {volPath  = vpCalign; symName="/ALIC_1/0STR_1";}
 457      else
 458        {volPath  = vpAalign; symName="/ALIC_1/0STL_1";}
 459
 460       AliDebug(2,"--------------------------------------------");
 461       AliDebug(2,Form("Alignable object %d", imod));
 462       AliDebug(2,Form("volPath=%s\n",volPath.Data()));
 463       AliDebug(2,Form("symName=%s\n",symName.Data()));
 464       AliDebug(2,"--------------------------------------------");
 465       if(!gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data()))
 466        AliFatal(Form("Alignable entry %s not created. Volume path %s not valid",
 467 symName.Data(),volPath.Data()));
 468    }
 469 }
 470 //------------------------------------------------------------------------
 471 void AliT0v1::CreateMaterials()
 472 {
 473    Int_t isxfld   = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Integ();
 474    Float_t sxmgmx = ((AliMagF*)TGeoGlobalMagField::Instance()->GetField())->Max();
 475    //   Float_t a,z,d,radl,absl,buf[1];
 476    // Int_t nbuf;
 477 // AIR
 478
 479    Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
 480    Float_t zAir[4]={6.,7.,8.,18.};
 481    Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 482    Float_t dAir = 1.20479E-3;
 483    Float_t dAir1 = 1.20479E-11;
 484
 485 // Scintillator CH
 486    Float_t ascin[2]={1.01,12.01};
 487    Float_t zscin[2]={1,6};
 488    Float_t wscin[2]={1,1};
 489    Float_t denscin=1.03;
 490 //Lucite C(CH3)CO2CH3
 491    Float_t alucite[3]={1.01,12.01,15.999};
 492    Float_t zlucite[3]={1,6,8};
 493    Float_t wlucite[3]={8,5,2};
 494    Float_t denlucite=1.16;
 495  // PMT glass SiO2
 496    Float_t aglass[2]={28.0855,15.9994};
 497    Float_t zglass[2]={14.,8.};
 498    Float_t wglass[2]={1.,2.};
 499    Float_t dglass=2.65;
 500 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 501    // Float_t wcer[2]={0.972,0.028};
 502    Float_t aCeramic[2]  = { 26.981539,15.9994 };
 503    Float_t zCeramic[2]  = { 13.,8. };
 504    Float_t wCeramic[2]  = { 2.,3. };
 505    Float_t denscer  = 3.6;
 506
 507 // Brass 80% Cu, 20% Zn
 508    Float_t abrass[2] = {63.546,65.39};
 509    Float_t zbrass[2] = {29,30};
 510    Float_t wbrass[2] = {0.8,0.2};
 511    Float_t denbrass=8.96;
 512
 513 //Ribber C6H12S
 514    Float_t aribber[3] = {12.,1.,32.};
 515    Float_t zribber[3] = {6.,1.,16.};
 516    Float_t wribber[3] = {6.,12.,1.};
 517    Float_t denribber=0.8;
 518 // Support inside
 519    Float_t asupport[2] = {12.,1.};
 520    Float_t zsupport[2] = {6.,1.};
 521    Float_t wsupport[2] = {1.,1.};
 522    Float_t densupport=0.1;
 523
 524 //*** Definition Of avaible T0 materials ***
 525    AliMaterial(0, "Steel$", 55.850,26.,7.87,1.76,999);
 526    AliMixture(1, "Vacuum$", aAir, zAir, dAir1,4,wAir);
 527    AliMixture(2, "Air$", aAir, zAir, dAir,4,wAir);
 528    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999);
 529    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999);
 530
 531    AliMixture( 3, "Ceramic  $",aCeramic, zCeramic, denscer, -2, wCeramic);
 532    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 533    /*
 534   char namate[21]="";
 535
 536    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 537    acer[0]=a;
 538
 539    zcer[0]=z;
 540    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 541    acer[1]=a;
 542    zcer[1]=z;
 543    AliMixture( 11, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 544    */
 545     AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 546    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 547    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 548    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
 549    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
 550    AliMixture( 21, "PMT Optical glass   $",aglass,zglass,dglass,-2,wglass);
 551    AliMixture( 24, "PMT Optical glass cathode $",aglass,zglass,dglass,-2,wglass);
 552     AliMixture(22, "T0 Opt Air$", aAir, zAir, dAir,4,wAir);
 553    AliMixture(23, "T0 Opt Air Next$", aAir, zAir, dAir,4,wAir);
 554
 555    AliMedium(1, "T0 Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 556    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 557    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 558    AliMedium(4, "Ceramic$", 3, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 559    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 560    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 561    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 562    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 563    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 564    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 565    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 566    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 567    AliMedium(16, "OpticalGlass$", 21, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 568    AliMedium(17, "T0 OpAir$", 22, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 569    AliMedium(18, "T0 OpAirNext$", 23, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 570     AliMedium(19, "OpticalGlassCathode$", 24, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 571
 572    AliDebugClass(1,": ++++++++++++++Medium set++++++++++");
 573
 574
 575 }
 576
 577 //-------------------------------------------------------------------
 578 void AliT0v1::DefineOpticalProperties()
 579 {
 580 // Optical properties definition.
 581    Int_t *idtmed = fIdtmed->GetArray();
 582 // Definition Cherenkov parameters
 583    int i;
 584    const Int_t kNbins=31;
 585
 586    Float_t rindexSiO2[kNbins],  efficAll[kNbins], rindexAir[kNbins], absorAir[kNbins],rindexCathodeNext[kNbins], absorbCathodeNext[kNbins];
 587    Double_t efficMet[kNbins], aReflMet[kNbins];
 588
 589    // quartz 20mm
 590    Float_t aAbsSiO2[kNbins]={29.0, 28.6, 28.3, 27.7, 27.3, 26.7, 26.4,
 591                              25.9, 25.3, 24.9, 24.5, 23.7,
 592                              23.2, 22.8, 22.4, 21.8, 21.3,
 593                              22.8, 22.1, 21.7, 21.2, 20.5,
 594                              19.9, 19.3, 18.7, 18.0, 17.1,
 595                              16.3, 15.3, 14.3, 14.3   };
 596
 597    Float_t aPckov[kNbins]  ={3.87, 3.94, 4.02, 4.11, 4.19, 4.29, 4.38,
 598                              4.48, 4.58, 4.69, 4.81, 4.93,
 599                              5.05, 5.19, 5.33, 5.48, 5.63,
 600                              5.8,  5.97, 6.16, 6.36, 6.57,
 601                              6.8,  7.04, 7.3,  7.58, 7.89,
 602                              8.22, 8.57, 8.97, 9.39 };
 603   Double_t dPckov[kNbins]  ={3.87, 3.94, 4.02, 4.11, 4.19, 4.29, 4.38,
 604                              4.48, 4.58, 4.69, 4.81, 4.93,
 605                              5.05, 5.19, 5.33, 5.48, 5.63,
 606                              5.8,  5.97, 6.16, 6.36, 6.57,
 607                              6.8,  7.04, 7.3,  7.58, 7.89,
 608                              8.22, 8.57, 8.97, 9.39 };
 609
 610    /*
 611    Float_t effCathode[kNbins]={0.11, 0.13, 0.15, 0.16, 0.18, 0.19, 0.20,
 612                               0.21, 0.22, 0.23, 0.24, 0.26,
 613                               0.27, 0.29, 0.30, 0.29, 0.29,
 614                               0.28, 0.28, 0.27, 0.26, 0.25,
 615                               0.25, 0.23, 0.20, 0.19, 0.17,
 616                               0.17, 0.17, 0.2, 0.23};
 617    */
 618    //  Float_t aAbsSiO2[kNbins]; //quartz 30mm
 619  for(i=0;i<kNbins;i++)
 620
 621     {
 622       aPckov[i]=aPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV
 623       dPckov[i]=dPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV
 624       //      rindexAir[i]=0.0001;
 625       rindexAir[i] = 1.;
 626       rindexSiO2[i]=1.458; //refractive index for qwarts
 627       rindexCathodeNext[i]=0;
 628       efficAll[i]=1.;
 629       efficMet[i]=0.;
 630       aReflMet[i]=1.;
 631       //      aAbsSiO2[i]=28.5; //quartz 30mm
 632       absorAir[i]=0.3;
 633       absorbCathodeNext[i]=0;
 634
 635     }
 636
 637   gMC->SetCerenkov (idtmed[kOpGlass], kNbins, aPckov, aAbsSiO2, efficAll, rindexSiO2 );
 638    // gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2, effCathode, rindexSiO2 );
 639    gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2,efficAll , rindexSiO2 );
 640   gMC->SetCerenkov (idtmed[kOpAir], kNbins, aPckov,absorAir , efficAll,rindexAir );
 641    gMC->SetCerenkov (idtmed[kOpAirNext], kNbins, aPckov,absorbCathodeNext , efficAll, rindexCathodeNext);
 642
 643    //Define a boarder for radiator optical properties
 644    gMC->DefineOpSurface("surfRd", kUnified /*kGlisur*/,kDielectric_metal,kPolished, 0.);
 645    gMC->SetMaterialProperty("surfRd", "EFFICIENCY", kNbins, dPckov, efficMet);
 646    gMC->SetMaterialProperty("surfRd", "REFLECTIVITY", kNbins, dPckov, aReflMet);
 647    gMC->SetBorderSurface("0TOPborder", "0TOP",1,"0TOO",1, "surfRd");
 648
 649
 650 }
 651
 652 //-------------------------------------------------------------------
 653 void AliT0v1::Init()
 654 {
 655 // Initialises version 0 of the Forward Multiplicity Detector
 656 //
 657   AliT0::Init();
 658   fIdSens1=gMC->VolId("0REG");
 659
 660    AliDebug(1,Form("%s: *** T0 version 1 initialized ***\n",ClassName()));
 661 }
 662
 663 //-------------------------------------------------------------------
 664
 665 void AliT0v1::StepManager()
 666 {
 667   //
 668   // Called for every step in the T0 Detector
 669   //
 670   Int_t id,copy,copy1;
 671   static Float_t hits[6];
 672   static Int_t vol[2];
 673   TLorentzVector pos;
 674   TLorentzVector mom;
 675
 676   //   TClonesArray &lhits = *fHits;
 677
 678   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 679
 680   id=gMC->CurrentVolID(copy);
 681
 682   // Check the sensetive volume
 683   if(id==fIdSens1 ) {
 684     if(gMC->IsTrackEntering()) {
 685       gMC->CurrentVolOffID(2,copy);
 686       vol[1]=copy;
 687       gMC->CurrentVolOffID(3,copy1);
 688       vol[0]=copy1;
 689       gMC->TrackPosition(pos);
 690       hits[0] = pos[0];
 691       hits[1] = pos[1];
 692       hits[2] = pos[2];
 693       if(pos[2]<0) vol[0] = 2;
 694       if(pos[2]>=0) vol[0] = 1;
 695
 696       Float_t etot=gMC->Etot();
 697       hits[3]=etot;
 698       Int_t iPart= gMC->TrackPid();
 699       Int_t partID=gMC->IdFromPDG(iPart);
 700       hits[4]=partID;
 701       Float_t ttime=gMC->TrackTime();
 702       hits[5]=ttime*1e12;
 703       if (gMC->TrackPid() == 50000050)   // If particles is photon then ...
 704         {
 705           if(RegisterPhotoE(vol[1]-1,hits[3])) {
 706             AddHit(gAlice->GetMCApp()->GetCurrentTrackNumber(),vol,hits);
 707             // Create a track reference at the exit of photocatode
 708           }
 709         }
 710
 711       //charge particle
 712       if ( gMC->TrackCharge() )
 713         AddTrackReference(gAlice->GetMCApp()->GetCurrentTrackNumber(), AliTrackReference::kT0);
 714
 715         /*
 716                 printf("track(%i) alive(%i) disap(%i) enter(%i) exit(%i) inside(%i) out(%i) stop(%i) new(%i) \n",
 717                        gAlice->GetMCApp()->GetCurrentTrackNumber(),
 718                gMC->IsTrackAlive(),
 719                gMC->IsTrackDisappeared(),
 720                gMC->IsTrackEntering(),
 721                gMC->IsTrackExiting(),
 722                gMC->IsTrackInside(),
 723                gMC->IsTrackOut(),
 724                gMC->IsTrackStop(),
 725                gMC->IsNewTrack());
 726         */
 727     }// trck entering
 728   } //sensitive
 729
 730 }
 731
 732
 733
 734 //------------------------------------------------------------------------
 735 Bool_t AliT0v1::RegisterPhotoE(Int_t ipmt,Double_t energy)
 736 {
 737
 738
 739   //  Float_t hc=197.326960*1.e6; //mev*nm
 740   Double_t hc=1.973*1.e-6; //gev*nm
 741   Float_t lambda=hc/energy;
 742   Float_t eff = ((TGraph*) fEffPMT.At(ipmt))->Eval(lambda);
 743   Double_t  p = gRandom->Rndm();
 744
 745   if (p > eff)
 746     return kFALSE;
 747
 748   return kTRUE;
 749 }
 750
 751 //----------------------------------------------------------------------------
 752
 753
 754
 755
 756
 757