START/AliSTARTv1.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
  17 /////////////////////////////////////////////////////////////////////
  18 //                                                                 //
  19 // START ( T-zero) detector  version 1                             //
  20 //
  21 //Begin Html
  22 /*
  23 <img src="gif/AliSTARTv1Class.gif">
  24 */
  25 //End Html
  26 //                                                                  //
  27 //                                                                  //
  28 //////////////////////////////////////////////////////////////////////
  29
  30 #include <Riostream.h>
  31 #include <stdlib.h>
  32
  33 #include <TGeometry.h>
  34 #include <TLorentzVector.h>
  35 #include <TMath.h>
  36 #include <TNode.h>
  37 #include <TTUBE.h>
  38 #include <TVirtualMC.h>
  39
  40 #include "AliLog.h"
  41 #include "AliMagF.h"
  42 #include "AliRun.h"
  43 #include "AliSTARThit.h"
  44 #include "AliSTARTv1.h"
  45 #include "AliMC.h"
  46
  47 ClassImp(AliSTARTv1)
  48
  49 //--------------------------------------------------------------------
  50 AliSTARTv1::AliSTARTv1(const char *name, const char *title):
  51  AliSTART(name,title)
  52 {
  53   //
  54   // Standart constructor for START Detector version 0
  55   //
  56   fIdSens1=0;
  57   fIshunt = 2;
  58 }
  59 //_____________________________________________________________________________
  60
  61 AliSTARTv1::~AliSTARTv1()
  62 {
  63   // desctructor
  64 }
  65
  66 //-------------------------------------------------------------------------
  67 void AliSTARTv1::CreateGeometry()
  68 {
  69   //
  70   // Create the geometry of START Detector version 0
  71   //
  72   // begin Html
  73   /*
  74    <img src="gif/AliSTARTv0.gif">
  75   */
  76   //
  77
  78
  79
  80   Int_t *idtmed = fIdtmed->GetArray();
  81
  82   Int_t is;
  83   Int_t idrotm[999];
  84   Float_t x,y,z;
  85
  86   Float_t pstartR[18]={0., 360., 5.,
  87                        -76.5+0.00+69.7, 4.25, 10.,
  88                        -76.5+6.05+69.7, 4.5, 10.,
  89                        -76.5+8.05+69.7, 4.5, 10.,
  90                        -76.5+8.05+69.7, 5.1, 10.,
  91                        -62.9+0.00+69.7, 5.1, 10.};
  92
  93   Float_t pstart[3]={4.3, 12.,6.8};
  94   Float_t pinstart[3]={0.,1.6,6.5};
  95   Float_t ppmt[3]={0.,1.5,3.5};
  96   Float_t ptop[3]={0.,1.,1.5};
  97   Float_t preg[3]={0., 1.0, 0.005}; //photcathode dobavil bogdanov
  98   Float_t ptopout[3]={1.,1.01,1.5};
  99   //  Float_t pregafter[3]={0.,1.0,0.005};
 100   Float_t pdivider[3]={0.,1.2,1.75};
 101   Float_t pdiv2[3]={0.,1.2,1.25};
 102   Float_t pdiv1[3]={0.6,1.2,0.5};
 103   Float_t pbot[3]={0.6,1.2,0.1};
 104   Float_t pglass[3]={1.2,1.3,2.};
 105   Float_t pcer[3]={0.9,1.1,0.09};
 106   Float_t psteel[3]={0.9,1.1,0.01};
 107   Float_t ppins[3]={0.6,1.2,0.014};
 108   Float_t phole[3]={0.6,1.2,0.015};
 109   Float_t pknob[3]={0.5,0.6,0.4};
 110   Float_t pknob_vac[3]={0.,0.5,0.4};
 111   Float_t pknob_bot[3]={0.,0.6,0.05};
 112   Float_t pribber[3] = {0.,1.2,2.413/2.};
 113   Float_t presist[3] = {0.,1.2,0.087/2.};
 114   Float_t psupport1[3] = {4.51,4.6,4.0};//C kozhuh vnutri
 115   Float_t psupport2[3] = {9.4,9.5,4.0};// snaruzhi  C
 116   Float_t psupport3[3] = {4.51,9.5,0.05};//kryshki  C
 117   Float_t psupport5[3] = {1.44,1.5,6.5}; // stakanchik dlai feu  C
 118   Float_t psupport6[3] = {0,1.5,0.05}; //kryshechka stakanchika  Al
 119   Float_t psupport7[3] = {1.5,1.6,0.6}; //kolechko snaruzhu stakanchika Al
 120
 121   // Mother Volume katushka dlia krepezha vokrug truby k Absorbru
 122     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
 123   Float_t ppcon[70];
 124     ppcon[0]  =   0;
 125     ppcon[1]  = 360;
 126     ppcon[2]  =  13;
 127 //  1:
 128     ppcon[3]  =  14.1/2;
 129     ppcon[4]  =   4.4;
 130     ppcon[5]  =   4.5;
 131 //  2
 132     ppcon[6]  = ppcon[3]+1.;
 133     ppcon[7]  =   4.4;
 134     ppcon[8]  =   4.5;
 135 //  3
 136     ppcon[9]  = ppcon[6];
 137     ppcon[10] =   4.4;
 138     ppcon[11] =   5.1;
 139
 140 //  4
 141
 142     ppcon[12]  = ppcon[9]+0.1;
 143     ppcon[13] =   4.4;
 144     ppcon[14] =   5.1;
 145 //  5
 146
 147     ppcon[15]  = ppcon[12];
 148     ppcon[16] =   4.9;
 149     ppcon[17] =   5.1;
 150
 151 //  6
 152     ppcon[18]  = ppcon[15]+7.05;
 153     ppcon[19] =   4.9;
 154     ppcon[20] =   5.1;
 155
 156 //  7
 157     ppcon[21]  = ppcon[18];
 158     ppcon[22] =   4.9;
 159     ppcon[23] =   5.1;
 160
 161 /// 8
 162     ppcon[24]  = ppcon[21]+0.01;
 163     ppcon[25] =   3.15;
 164     ppcon[26] =   3.25;
 165
 166 /// 9
 167     ppcon[27]  = ppcon[24];
 168     ppcon[28] =   3.15;
 169     ppcon[29] =   3.25;
 170
 171 //  10
 172     ppcon[30]  = ppcon[27]+4.5;
 173     ppcon[31] =   3.15;
 174     ppcon[32] =   3.25;
 175
 176 //  11
 177     ppcon[33] = ppcon[30];
 178     ppcon[34] =   3.15;
 179     ppcon[35] =   3.25;
 180
 181 //  12
 182     ppcon[36]  = ppcon[33];
 183     ppcon[37] =   3.15;
 184     ppcon[38] =   7.6;
 185
 186 //  13
 187     ppcon[39]  = ppcon[33]+0.4;
 188     ppcon[40] =   3.15;
 189     ppcon[41] =   7.6;
 190
 191 //  14
 192 //    ppcon[39]  = ppcon[36];
 193 //    ppcon[40] =   3.15;
 194 //    ppcon[41] =   7.6;
 195
 196     gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,42);
 197     z=-69.7;//-14.1/2;
 198     gMC->Gspos("0SUP",1,"ALIC",0.,0.,z,idrotm[901],"ONLY");
 199
 200
 201    Float_t zdetRight=69.7,zdetLeft=350;
 202  //-------------------------------------------------------------------
 203  //  START volume
 204  //-------------------------------------------------------------------
 205
 206
 207     gMC->Gsvolu("0STR","PCON",idtmed[kAir],pstartR,18);
 208     gMC->Gsvolu("0STL","TUBE",idtmed[kAir],pstart,3);
 209     gMC->Gspos("0STR",1,"ALIC",0.,0.,-zdetRight-pstart[2],idrotm[901],"ONLY");
 210     gMC->Gspos("0STL",1,"ALIC",0.,0.,zdetLeft+pstart[2],0,"ONLY");
 211
 212 //START interior
 213    gMC->Gsvolu("0INS","TUBE",idtmed[kAir],pinstart,3);
 214    gMC->Gsvolu("0PMT","TUBE",idtmed[kAir],ppmt,3);
 215
 216     gMC->Gsvolu("0DIV","TUBE",idtmed[kVac],pdivider,3);
 217     gMC->Gsvolu("0SU1","TUBE",idtmed[kC],psupport1,3);//C kozhuh vnutri
 218     gMC->Gsvolu("0SU2","TUBE",idtmed[kC],psupport2,3);// snaruzhi  C
 219     gMC->Gsvolu("0SU3","TUBE",idtmed[kC],psupport3,3);//kryshka perednaiai  C
 220     gMC->Gsvolu("0SU4","TUBE",idtmed[kC],psupport3,3);//kryshka zadnaiai  C
 221     //    gMC->Gsvolu("0SU5","TUBE",idtmed[kAir],psupport4,3);// dyrki dlia feu v zadnej kryshke Air
 222     gMC->Gsvolu("0SU6","TUBE",idtmed[kC],psupport5,3);// stakanchik dlai feu  C
 223     gMC->Gsvolu("0SU7","TUBE",idtmed[kAl],psupport6,3);//kryshechka stakanchika  Al
 224     gMC->Gsvolu("0SU8","TUBE",idtmed[kAl],psupport7,3);//kolechko snaruzhu stakanchika Al
 225
 226 // first ring: 12 units of Scintillator+PMT+divider
 227   Float_t  theta  = (180 / TMath::Pi()) * TMath::ATan(6.5 / zdetRight);
 228   printf(" theta %f", theta);
 229   Float_t angle  = 2 * TMath::Pi() / 12;
 230   Float_t phi[3];
 231
 232    for (is=0; is<12; is++)
 233       {
 234
 235         x = 6.5 * TMath::Sin(is * angle);
 236         y = 6.5 * TMath::Cos(is * angle);
 237
 238         phi[0] = -30 * is;
 239         phi[1] = 90 - is * 30;
 240         phi[2] = 90 - is * 30;
 241         for (Int_t j = 0; j < 3; j++)
 242           if (phi[j] < 0)  phi[j] += 360;
 243
 244         AliMatrix (idrotm[902 + is], 90.,         phi[0],
 245                    90. + theta, phi[1],
 246                    theta,       phi[2]);
 247         z=-pstart[2]+pinstart[2]+0.2;
 248         gMC->Gspos ("0INS", is + 1, "0STR", x, y, z, idrotm[902 + is], "ONLY");
 249         gMC->Gspos ("0INS", is + 13, "0STL", x, y, z, 0, "ONLY");
 250         /*
 251         x = 9.1 * TMath::Sin(angle/2+is * angle);
 252         y = 9.1 * TMath::Cos(angle/2+is * angle);
 253
 254         gMC->Gspos ("0INS", is + 25, "0STL", x, y, z, 0, "ONLY");
 255         */
 256       }
 257
 258
 259    x=0;
 260    y=0;
 261    // z=-pinstart[2]+ppmt[2]+2.*psupport6[2]+0.1;
 262     z=-pinstart[2]+ppmt[2];
 263    gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
 264    //   z=z+pdivider[2]+ppmt[2];
 265    //  gMC->Gspos("0DIV",1,"0INS",x,y,z,0,"ONLY");
 266
 267    // PMT
 268
 269    // Entry window (glass)
 270    gMC->Gsvolu("0TOP","TUBE",idtmed[kOpGlass],ptop,3); //glass
 271    //   gMC->Gsvolu("0TOP","TUBE",idtmed[12],ptop,3); //lucite
 272    z=-ppmt[2]+ptop[2];
 273    gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
 274    //metal volume to simulate reclection
 275    gMC->Gsvolu("0TOO","TUBE",idtmed[kOpAir],ptopout,3); //glass
 276    //   gMC->Gsvolu("0TOP","TUBE",idtmed[12],ptop,3); //lucite
 277    gMC->Gspos("0TOO",1,"0PMT",0,0,z,0,"ONLY");
 278
 279    //Fotokatod
 280    gMC->Gsvolu ("0REG", "TUBE", idtmed[kOpGlassCathode], preg, 3);
 281    z = -ppmt[2] + 2 * ptop[2] + preg[2];
 282    gMC->Gspos ("0REG", 1, "0PMT", 0, 0, z, 0, "ONLY");
 283    //optical volume special to detect photons in cathode
 284    //   gMC->Gsvolu ("0RE1", "TUBE", idtmed[kOpAirNext], pregafter, 3);
 285    // z = -ppmt[2] + 2 * ptop[2] + 2*preg[2] + pregafter[2];
 286    // gMC->Gspos ("0RE1", 1, "0PMT", 0, 0, z, 0, "ONLY");
 287
 288    // Bottom glass
 289    gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
 290    z=ppmt[2]-pbot[2];
 291    if(fDebug) printf("%s: Z bottom %f\n",ClassName(),z);
 292    gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
 293    // Side cylinder glass
 294    gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
 295    z=ppmt[2]-pglass[2];
 296    gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
 297    //PMT electrodes support structure
 298    gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
 299    gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
 300    z=-ppmt[2]+2*ptop[2]+0.3;;
 301    for (is=1; is<=15; is++)
 302      {
 303        z=z+psteel[2]+pcer[2];
 304        gMC->Gspos("0CER",is,"0PMT",0,0,z,0,"ONLY");
 305        z=z+psteel[2]+pcer[2];
 306        gMC->Gspos("0STE",is,"0PMT",0,0,z,0,"ONLY");
 307      }
 308
 309    // Divider
 310    // Knob at the bottom of PMT baloon
 311
 312    gMC->Gsvolu("0NB","TUBE",idtmed[6],pknob,3);
 313    z=-pdivider[2]+pknob[2];
 314    gMC->Gspos("0NB",1,"0DIV",0,0,z,0,"ONLY");
 315    gMC->Gsvolu("0KB","TUBE",idtmed[kGlass],pknob_bot,3);
 316    z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
 317    gMC->Gspos("0KB",1,"0DIV ",0,0,z,0,"ONLY");
 318    gMC->Gsvolu("0VAC","TUBE",idtmed[kVac],pknob_vac,3);
 319    z=-pdivider[2]+pknob_vac[2];
 320    gMC->Gspos("0VAC",1,"0DIV",0,0,z,0,"ONLY");
 321    //Steel pins + pin holes
 322    gMC->Gsvolu("0PIN","TUBE",idtmed[kSteel],ppins,3);
 323    z=-pdivider[2]+ppins[2];
 324    gMC->Gspos("0PIN",1,"0DIV",0,0,z,0,"ONLY");
 325    gMC->Gsvolu("0HOL","TUBE",idtmed[kBrass],phole,3);
 326    z=-pdivider[2]+2*ppins[2]+phole[2];
 327    gMC->Gspos("0HOL",1,"0DIV",0,0,z,0,"ONLY");
 328
 329    //Socket
 330    gMC->Gsvolu("0V1","TUBE",idtmed[kCer],pdiv1,3);
 331    z=-pdivider[2]+pdiv1[2];
 332    gMC->Gspos("0V1",1,"0DIV",0,0,z,0,"ONLY");
 333    //Resistors
 334    gMC->Gsvolu("0V2","TUBE",idtmed[kAir],pdiv2,3);
 335    z=pdivider[2]-pdiv2[2];
 336    gMC->Gspos("0V2",1,"0DIV",0,0,z,0,"ONLY");
 337    gMC->Gsvolu("0RS","TUBE",idtmed[kCer],presist,3);
 338    z=-pdiv2[2]+presist[2];
 339    gMC->Gspos("0RS",1,"0V2",0,0,z,0,"ONLY");
 340    gMC->Gsvolu("0RB","TUBE",idtmed[kRibber],pribber,3);
 341    z=pdiv2[2]-pribber[2];
 342    gMC->Gspos("0RB",1,"0V2",0,0,z,0,"ONLY");
 343
 344
 345    //Support  left side
 346    z=-pstart[2]+psupport1[2]+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];
 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,"0INS",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]=6.9/2;
 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]=0.1/2;
 387     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
 388
 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]=4.5/2;
 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]=7.5;
 401     par[2]=0.2;
 402     gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
 403     z += 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]=7.5;
 407     par[2]=0.01;
 408     gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
 409     gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"ONLY");
 410
 411
 412 }
 413 //------------------------------------------------------------------------
 414 void AliSTARTv1::CreateMaterials()
 415 {
 416    Int_t isxfld   = gAlice->Field()->Integ();
 417    Float_t sxmgmx = gAlice->Field()->Max();
 418    //   Float_t a,z,d,radl,absl,buf[1];
 419    // Int_t nbuf;
 420    Int_t *idtmed = fIdtmed->GetArray();
 421
 422 // AIR
 423
 424    Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
 425    Float_t zAir[4]={6.,7.,8.,18.};
 426    Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 427    Float_t dAir = 1.20479E-3;
 428
 429 // Scintillator CH
 430    Float_t ascin[2]={1.01,12.01};
 431    Float_t zscin[2]={1,6};
 432    Float_t wscin[2]={1,1};
 433    Float_t denscin=1.03;
 434 //Lucite C(CH3)CO2CH3
 435    Float_t alucite[3]={1.01,12.01,15.999};
 436    Float_t zlucite[3]={1,6,8};
 437    Float_t wlucite[3]={8,5,2};
 438    Float_t denlucite=1.16;
 439  // PMT glass SiO2
 440    Float_t aglass[2]={28.0855,15.9994};
 441    Float_t zglass[2]={14.,8.};
 442    Float_t wglass[2]={1.,2.};
 443    Float_t dglass=2.65;
 444 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 445    // Float_t wcer[2]={0.972,0.028};
 446    Float_t aCeramic[2]  = { 26.981539,15.9994 };
 447    Float_t zCeramic[2]  = { 13.,8. };
 448    Float_t wCeramic[2]  = { 2.,3. };
 449    Float_t denscer  = 3.6;
 450
 451 // Brass 80% Cu, 20% Zn
 452    Float_t abrass[2] = {63.546,65.39};
 453    Float_t zbrass[2] = {29,30};
 454    Float_t wbrass[2] = {0.8,0.2};
 455    Float_t denbrass=8.96;
 456
 457 //Ribber C6H12S
 458    Float_t aribber[3] = {12.,1.,32.};
 459    Float_t zribber[3] = {6.,1.,16.};
 460    Float_t wribber[3] = {6.,12.,1.};
 461    Float_t denribber=0.8;
 462 // Support inside
 463    Float_t asupport[2] = {12.,1.};
 464    Float_t zsupport[2] = {6.,1.};
 465    Float_t wsupport[2] = {1.,1.};
 466    Float_t densupport=0.1;
 467
 468 //*** Definition Of avaible START materials ***
 469    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
 470    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 471    AliMixture(2, "START Air$", aAir, zAir, dAir,4,wAir);
 472    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999);
 473    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999);
 474
 475    AliMixture( 3, "Ceramic  $",aCeramic, zCeramic, denscer, -2, wCeramic);
 476    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 477    /*
 478   char namate[21]="";
 479
 480    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 481    acer[0]=a;
 482
 483    zcer[0]=z;
 484    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 485    acer[1]=a;
 486    zcer[1]=z;
 487    AliMixture( 11, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 488    */
 489     AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 490    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 491    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 492    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
 493    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
 494    AliMixture( 21, "PMT Optical glass   $",aglass,zglass,dglass,-2,wglass);
 495    AliMixture( 24, "PMT Optical glass cathode $",aglass,zglass,dglass,-2,wglass);
 496     AliMixture(22, "START Opt Air$", aAir, zAir, dAir,4,wAir);
 497    AliMixture(23, "START Opt Air Next$", aAir, zAir, dAir,4,wAir);
 498
 499    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 500    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 501    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 502    AliMedium(4, "Ceramic$", 3, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 503    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 504    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 505    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 506    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 507    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 508    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 509    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 510    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 511    AliMedium(16, "OpticalGlass$", 21, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 512    AliMedium(17, "START OpAir$", 22, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 513    AliMedium(18, "START OpAirNext$", 23, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 514     AliMedium(19, "OpticalGlassCathode$", 24, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 515
 516
 517 // Definition Cherenkov parameters
 518    int i;
 519    const Int_t kNbins=31;
 520
 521    Float_t rindexSiO2[kNbins],  efficAll[kNbins], rindexAir[kNbins], absorAir[kNbins],rindexCathodeNext[kNbins], absorbCathodeNext[kNbins];
 522
 523    // quartz 20mm
 524    Float_t aAbsSiO2[kNbins]={29.0, 28.6, 28.3, 27.7, 27.3, 26.7, 26.4,
 525                              25.9, 25.3, 24.9, 24.5, 23.7,
 526                              23.2, 22.8, 22.4, 21.8, 21.3,
 527                              22.8, 22.1, 21.7, 21.2, 20.5,
 528                              19.9, 19.3, 18.7, 18.0, 17.1,
 529                              16.3, 15.3, 14.3, 14.3   };
 530
 531    Float_t aPckov[kNbins]  ={3.87, 3.94, 4.02, 4.11, 4.19, 4.29, 4.38,
 532                              4.48, 4.58, 4.69, 4.81, 4.93,
 533                              5.05, 5.19, 5.33, 5.48, 5.63,
 534                              5.8,  5.97, 6.16, 6.36, 6.57,
 535                              6.8,  7.04, 7.3,  7.58, 7.89,
 536                              8.22, 8.57, 8.97, 9.39 };
 537    /*
 538    Float_t effCathode[kNbins]={0.11, 0.13, 0.15, 0.16, 0.18, 0.19, 0.20,
 539                               0.21, 0.22, 0.23, 0.24, 0.26,
 540                               0.27, 0.29, 0.30, 0.29, 0.29,
 541                               0.28, 0.28, 0.27, 0.26, 0.25,
 542                               0.25, 0.23, 0.20, 0.19, 0.17,
 543                               0.17, 0.17, 0.2, 0.23};
 544    */
 545    //  Float_t aAbsSiO2[kNbins]; //quartz 30mm
 546   for(i=0;i<kNbins;i++)
 547     {
 548       aPckov[i]=aPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV
 549       rindexAir[i]=0;
 550       rindexSiO2[i]=1.458; //refractive index for qwarts
 551       rindexCathodeNext[i]=0;
 552       efficAll[i]=1.;
 553
 554       //      aAbsSiO2[i]=28.5; //quartz 30mm
 555       absorAir[i]=0.3;
 556       absorbCathodeNext[i]=0;
 557
 558     }
 559
 560
 561    gMC->SetCerenkov (idtmed[kOpGlass], kNbins, aPckov, aAbsSiO2, efficAll, rindexSiO2 );
 562    // gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2, effCathode, rindexSiO2 );
 563    gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2,efficAll , rindexSiO2 );
 564   gMC->SetCerenkov (idtmed[kOpAir], kNbins, aPckov,absorAir , efficAll,rindexAir );
 565    gMC->SetCerenkov (idtmed[kOpAirNext], kNbins, aPckov,absorbCathodeNext , efficAll, rindexCathodeNext);
 566
 567    if(fDebug) cout<<ClassName()<<": ++++++++++++++Medium set++++++++++"<<endl;
 568
 569
 570 }
 571 //---------------------------------------------------------------------
 572 void AliSTARTv1::DrawDetector()
 573 {
 574 //
 575 // Draw a shaded view of the Forward multiplicity detector version 0
 576 //
 577
 578   //Set ALIC mother transparent
 579   gMC->Gsatt("ALIC","SEEN",0);
 580   //
 581   //Set volumes visible
 582   //  gMC->Gsatt("0STR","SEEN",0);
 583   //  gMC->Gsatt("0INS","SEEN",0);
 584   // gMC->Gsatt("0PMT","SEEN",1);
 585   // gMC->Gsatt("0DIV","SEEN",1);
 586   //
 587   gMC->Gdopt("hide","off");
 588   gMC->Gdopt("shad","on");
 589   gMC->SetClipBox(".");
 590   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 591   gMC->DefaultRange();
 592   gMC->Gdraw("alic",90,0,0,-35,9.5,.6,0.6);
 593   //gMC->Gdraw("alic",0,0,0,10,9.5,.8,0.8); //other side view
 594   gMC->Gdhead(1111,"T-Zero detector");
 595   gMC->Gdopt("hide","off");
 596 }
 597
 598 //-------------------------------------------------------------------
 599 void AliSTARTv1::Init()
 600 {
 601 // Initialises version 0 of the Forward Multiplicity Detector
 602 //
 603 //Int_t *idtmed  = gAlice->Idtmed();
 604   AliSTART::Init();
 605   fIdSens1=gMC->VolId("0REG");
 606
 607    AliDebug(1,Form("%s: *** START version 1 initialized ***\n",ClassName()));
 608
 609 }
 610
 611 //-------------------------------------------------------------------
 612
 613 void AliSTARTv1::StepManager()
 614 {
 615   //
 616   // Called for every step in the START Detector
 617   //
 618   Int_t id,copy,copy1;
 619   static Float_t hits[6];
 620   static Int_t vol[2];
 621   TLorentzVector pos;
 622
 623   //   TClonesArray &lhits = *fHits;
 624
 625   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 626
 627 // If particles is photon then ...
 628
 629  if (gMC->TrackPid() == 50000050)
 630   {
 631       id=gMC->CurrentVolID(copy);
 632
 633
 634       // Check the sensetive volume
 635       if(id==fIdSens1 ) {
 636         if(gMC->IsTrackEntering()) {
 637           gMC->CurrentVolOffID(2,copy);
 638           vol[1]=copy;
 639           gMC->CurrentVolOffID(3,copy1);
 640           vol[0]=copy1;
 641           gMC->TrackPosition(pos);
 642           hits[0] = pos[0];
 643           hits[1] = pos[1];
 644           hits[2] = pos[2];
 645           if(pos[2]<0) vol[0]=2;
 646           if(pos[2]>=0) vol[0]=1;
 647
 648           Float_t etot=gMC->Etot();
 649           hits[3]=etot;
 650           Int_t iPart= gMC->TrackPid();
 651           Int_t partID=gMC->IdFromPDG(iPart);
 652           hits[4]=partID;
 653           Float_t ttime=gMC->TrackTime();
 654           hits[5]=ttime*1e12;
 655           AddHit(fIshunt,vol,hits);
 656           //  cout<< gAlice->GetMCApp()->GetCurrentTrackNumber()<<" hit added "<<endl;
 657         }
 658         /*
 659                 printf("track(%i) alive(%i) disap(%i) enter(%i) exit(%i) inside(%i) out(%i) stop(%i) new(%i) \n",
 660                        gAlice->GetMCApp()->GetCurrentTrackNumber(),
 661                gMC->IsTrackAlive(),
 662                gMC->IsTrackDisappeared(),
 663                gMC->IsTrackEntering(),
 664                gMC->IsTrackExiting(),
 665                gMC->IsTrackInside(),
 666                gMC->IsTrackOut(),
 667                gMC->IsTrackStop(),
 668                gMC->IsNewTrack());
 669         */
 670       } //sensitive
 671   } //photon
 672 }
 673
 674
 675
 676
 677
 678
 679
 680