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 "AliMagF.h"
  41 #include "AliRun.h"
  42 #include "AliSTARThit.h"
  43 #include "AliSTARTv1.h"
  44 #include "AliMC.h"
  45
  46 ClassImp(AliSTARTv1)
  47
  48 //--------------------------------------------------------------------
  49 AliSTARTv1::AliSTARTv1(const char *name, const char *title):
  50  AliSTART(name,title)
  51 {
  52   //
  53   // Standart constructor for START Detector version 0
  54   //
  55   fIdSens1=0;
  56 //  setBufferSize(128000);
  57 }
  58 //-------------------------------------------------------------------------
  59 void AliSTARTv1::CreateGeometry()
  60 {
  61   //
  62   // Create the geometry of START Detector version 0
  63   //
  64   // begin Html
  65   /*
  66    <img src="gif/AliSTARTv0.gif">
  67   */
  68   //
  69
  70
  71   Int_t *idtmed = fIdtmed->GetArray();
  72
  73   Int_t is;
  74   Int_t idrotm[999];
  75   Float_t x,y,z;
  76
  77   Float_t pstart[3]={4.2,11.,7.};
  78   Float_t pinstart[3]={0.,1.6,6.5};
  79   Float_t ppmt[3]={0.,1.3,3.5};
  80   Float_t pdivider[3]={0.,1.2,1.75};
  81   Float_t pdiv2[3]={0.,1.2,1.25};
  82   Float_t pdiv1[3]={0.6,1.2,0.5};
  83   Float_t ptop[3]={0.,1.3,1.5};
  84   Float_t pbot[3]={0.6,1.2,0.1};
  85   Float_t pglass[3]={1.2,1.3,2.};
  86   Float_t pcer[3]={0.9,1.1,0.09};
  87   Float_t psteel[3]={0.9,1.1,0.01};
  88   Float_t ppins[3]={0.6,1.2,0.014};
  89   Float_t phole[3]={0.6,1.2,0.015};
  90   Float_t pknob[3]={0.5,0.6,0.4};
  91   Float_t pknob_vac[3]={0.,0.5,0.4};
  92   Float_t pknob_bot[3]={0.,0.6,0.05};
  93   Float_t pribber[3] = {0.,1.2,2.413/2.};
  94   Float_t presist[3] = {0.,1.2,0.087/2.};
  95   Float_t psupport1[3] = {4.5,4.6,4.0};//C kozhuh vnutri
  96   Float_t psupport2[3] = {9.4,9.5,4.0};// snaruzhi  C
  97   Float_t psupport3[3] = {4.5,9.5,0.05};//kryshki  C
  98   Float_t psupport4[3] = {0,1.6,0.05};// dyrki dlia feu v zadnej kryshke Air
  99   Float_t psupport5[3] = {1.54,1.6,6.5}; // stakanchik dlai feu  C
 100   Float_t psupport6[3] = {0,1.6,0.05}; //kryshechka stakanchika  Al
 101   Float_t psupport7[3] = {1.5,1.6,0.6}; //kolechko snaruzhu stakanchika Al
 102   // Mother Volume katushka dlia krepezha vokrug truby k Absorbru
 103     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
 104   Float_t ppcon[70];
 105     ppcon[0]  =   0;
 106     ppcon[1]  = 360;
 107     ppcon[2]  =  15;
 108 //  1:
 109     ppcon[3]  =  14.1/2;
 110     ppcon[4]  =   4.4;
 111     ppcon[5]  =   4.6;
 112 //  2
 113     ppcon[6]  = ppcon[3]+0.9;
 114     ppcon[7]  =   4.4;
 115     ppcon[8]  =   4.6;
 116 //  3
 117     ppcon[9]  = ppcon[6];
 118     ppcon[10] =   4.4;
 119     ppcon[11] =   5.3;
 120
 121 //  4
 122
 123     ppcon[12]  = ppcon[9]+0.1;
 124     ppcon[13] =   4.4;
 125     ppcon[14] =   5.3;
 126 //  5
 127
 128     ppcon[15]  = ppcon[12];
 129     ppcon[16] =   5.1;
 130     ppcon[17] =   5.3;
 131
 132 //  6
 133     ppcon[18]  = ppcon[15]+5.8;
 134     ppcon[19] =   5.1;
 135     ppcon[20] =   5.3;
 136
 137 //  7
 138     ppcon[21]  = ppcon[18];
 139     ppcon[22] =   5.1;
 140     ppcon[23] =   5.9;
 141
 142 //  8
 143     ppcon[24]  = ppcon[21]+1.8;
 144     ppcon[25] =   5.1;
 145     ppcon[26] =   5.9;
 146 //  9
 147
 148    ppcon[27]  = ppcon[24];
 149     ppcon[28] =   3.15;
 150     ppcon[29] =   5.9;
 151
 152 //  10
 153     ppcon[30]  = ppcon[27]+0.3;
 154     ppcon[31] =   3.15;
 155     ppcon[32] =   5.9;
 156
 157 //  11
 158     ppcon[33]  = ppcon[30];
 159     ppcon[34] =   3.15;
 160     ppcon[35] =   5.9;
 161
 162 //  12
 163     ppcon[36]  = ppcon[33];
 164     ppcon[37] =   3.15;
 165     ppcon[38] =   3.25;
 166
 167 //  13
 168     ppcon[39]  = ppcon[36]+4.5;
 169     ppcon[40] =   3.15;
 170     ppcon[41] =   3.25;
 171 //  14
 172     ppcon[42]  = ppcon[39];
 173     ppcon[43] =   3.15;
 174     ppcon[44] =   7.6;
 175 //  15
 176     ppcon[45]  = ppcon[42]+1.;
 177     ppcon[46] =   3.15;
 178     ppcon[47] =   7.6;
 179
 180     gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,48);
 181     z=-69.7;//-14.1/2;
 182     gMC->Gspos("0SUP",1,"ALIC",0.,0.,z,idrotm[901],"ONLY");
 183
 184
 185    Float_t zdetRight=69.7,zdetLeft=350;
 186  //-------------------------------------------------------------------
 187  //  START volume
 188  //-------------------------------------------------------------------
 189
 190
 191     gMC->Gsvolu("0STR","TUBE",idtmed[kAir],pstart,3);
 192     gMC->Gsvolu("0STL","TUBE",idtmed[kAir],pstart,3);
 193     gMC->Gspos("0STR",1,"ALIC",0.,0.,-zdetRight-pstart[2],idrotm[901],"ONLY");
 194     gMC->Gspos("0STL",1,"ALIC",0.,0.,zdetLeft+pstart[2],0,"ONLY");
 195
 196 //START interior
 197     gMC->Gsvolu("0INS","TUBE",idtmed[kAir],pinstart,3);
 198     gMC->Gsvolu("0PMT","TUBE",idtmed[kVac],ppmt,3);
 199     gMC->Gsvolu("0DIV","TUBE",idtmed[kVac],pdivider,3);
 200     gMC->Gsvolu("0SU1","TUBE",idtmed[kC],psupport1,3);//C kozhuh vnutri
 201     gMC->Gsvolu("0SU2","TUBE",idtmed[kC],psupport2,3);// snaruzhi  C
 202     gMC->Gsvolu("0SU3","TUBE",idtmed[kC],psupport3,3);//kryshka perednaiai  C
 203     gMC->Gsvolu("0SU4","TUBE",idtmed[kC],psupport3,3);//kryshka zadnaiai  C
 204     gMC->Gsvolu("0SU5","TUBE",idtmed[kAir],psupport4,3);// dyrki dlia feu v zadnej kryshke Air
 205     cout<<" 0Su6 >> "<<psupport5[0]<<" "<<psupport5[1]<<" "<<psupport5[2]<<endl;
 206     gMC->Gsvolu("0SU6","TUBE",idtmed[kC],psupport5,3);// stakanchik dlai feu  C
 207     gMC->Gsvolu("0SU7","TUBE",idtmed[kAl],psupport6,3);//kryshechka stakanchika  Al
 208     gMC->Gsvolu("0SU8","TUBE",idtmed[kAl],psupport7,3);//kolechko snaruzhu stakanchika Al
 209
 210 // first ring: 12 units of Scintillator+PMT+divider
 211   Float_t  theta  = (180 / TMath::Pi()) * TMath::ATan(6.5 / zdetRight);
 212   Float_t angel  = 2 * TMath::Pi() / 12;
 213   Float_t phi[3];
 214    for (is=0; is<12; is++)
 215       {
 216
 217         x = 6.5 * TMath::Sin(is * angel);
 218         y = 6.5 * TMath::Cos(is * angel);
 219
 220      phi[0] = -30 * is;
 221      phi[1] = 90 - is * 30;
 222      phi[2] = 90 - is * 30;
 223      for (Int_t j = 0; j < 3; j++)
 224         if (phi[j] < 0)  phi[j] += 360;
 225
 226      AliMatrix (idrotm[902 + is], 90.,         phi[0],
 227                                  90. + theta, phi[1],
 228                                  theta,       phi[2]);
 229         z=-pstart[2]+pinstart[2]+0.2;
 230      gMC->Gspos ("0INS", is + 1, "0STR", x, y, z, idrotm[902 + is], "ONLY");
 231      gMC->Gspos ("0INS", is + 13, "0STL", x, y, z, 0, "ONLY");
 232       }
 233
 234
 235       x=0;
 236     y=0;
 237     z=-pinstart[2]+ppmt[2]+2.*psupport6[2];
 238     gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
 239     z=z+pdivider[2]+ppmt[2];
 240     gMC->Gspos("0DIV",1,"0INS",x,y,z,0,"ONLY");
 241
 242 // PMT
 243
 244     // Entry window (glass)
 245     gMC->Gsvolu("0TOP","TUBE",idtmed[kGlass],ptop,3); //glass
 246      //   gMC->Gsvolu("0TOP","TUBE",idtmed[12],ptop,3); //lucite
 247      z=-ppmt[2]+ptop[2];
 248     gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
 249     //     printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
 250
 251     // Bottom glass
 252     gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
 253     z=ppmt[2]-pbot[2];
 254     if(fDebug) printf("%s: Z bottom %f\n",ClassName(),z);
 255     gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
 256     // Side cylinder glass
 257     gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
 258     z=ppmt[2]-pglass[2];
 259     //      printf("Z glass %f\n",z);
 260     gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
 261     //PMT electrodes support structure
 262     gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
 263     gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
 264     z=-ppmt[2]+2*ptop[2]+0.3;;
 265     //      printf("Z Cer 1 %f\n",z);
 266     for (is=1; is<=15; is++)
 267       {
 268         z=z+psteel[2]+pcer[2];
 269         gMC->Gspos("0CER",is,"0PMT",0,0,z,0,"ONLY");
 270         z=z+psteel[2]+pcer[2];
 271         gMC->Gspos("0STE",is,"0PMT",0,0,z,0,"ONLY");
 272       }
 273
 274     // Divider
 275     // Knob at the bottom of PMT baloon
 276
 277     gMC->Gsvolu("0NB","TUBE",idtmed[6],pknob,3);
 278     z=-pdivider[2]+pknob[2];
 279     //      printf("zknob %f\n",z);
 280     gMC->Gspos("0NB",1,"0DIV",0,0,z,0,"ONLY");
 281     gMC->Gsvolu("0KB","TUBE",idtmed[kGlass],pknob_bot,3);
 282     z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
 283     //      printf(knobbot %f\n",z);
 284     gMC->Gspos("0KB",1,"0DIV ",0,0,z,0,"ONLY");
 285     gMC->Gsvolu("0VAC","TUBE",idtmed[kVac],pknob_vac,3);
 286     z=-pdivider[2]+pknob_vac[2];
 287     //      printf("knobvac %f\n",z);
 288     gMC->Gspos("0VAC",1,"0DIV",0,0,z,0,"ONLY");
 289     //Steel pins + pin holes
 290     gMC->Gsvolu("0PIN","TUBE",idtmed[kSteel],ppins,3);
 291     z=-pdivider[2]+ppins[2];
 292     gMC->Gspos("0PIN",1,"0DIV",0,0,z,0,"ONLY");
 293     gMC->Gsvolu("0HOL","TUBE",idtmed[kBrass],phole,3);
 294     z=-pdivider[2]+2*ppins[2]+phole[2];
 295     gMC->Gspos("0HOL",1,"0DIV",0,0,z,0,"ONLY");
 296
 297     //Socket
 298     gMC->Gsvolu("0V1","TUBE",idtmed[kCer],pdiv1,3);
 299     z=-pdivider[2]+pdiv1[2];
 300     gMC->Gspos("0V1",1,"0DIV",0,0,z,0,"ONLY");
 301     //Resistors
 302     gMC->Gsvolu("0V2","TUBE",idtmed[kAir],pdiv2,3);
 303     z=pdivider[2]-pdiv2[2];
 304     gMC->Gspos("0V2",1,"0DIV",0,0,z,0,"ONLY");
 305     gMC->Gsvolu("0RS","TUBE",idtmed[kCer],presist,3);
 306     z=-pdiv2[2]+presist[2];
 307     gMC->Gspos("0RS",1,"0V2",0,0,z,0,"ONLY");
 308     gMC->Gsvolu("0RB","TUBE",idtmed[kRibber],pribber,3);
 309     z=pdiv2[2]-pribber[2];
 310     gMC->Gspos("0RB",1,"0V2",0,0,z,0,"ONLY");
 311
 312
 313     //Support  left side
 314
 315     z=-pstart[2]+psupport1[2];
 316     gMC->Gspos("0SU1",2,"0STL",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
 317     gMC->Gspos("0SU2",2,"0STL",0,0,z,0,"ONLY"); //C kozhuh vnutri
 318     z=-pstart[2]+psupport3[2];
 319     gMC->Gspos("0SU3",2,"0STL",0,0,z,0,"ONLY"); //peredniaia kryshka
 320     z=-pstart[2]+2.*psupport1[2];
 321     gMC->Gspos("0SU4",2,"0STL",0,0,z,0,"ONLY"); //zadnaiai kryshka
 322     //Dyrki dlia feu v zadnej kryshke
 323     z=0;
 324
 325     for (is=1; is<=12; is++)
 326       {
 327         x=6.5*TMath::Sin(is*angel);
 328         y=6.5 *TMath::Cos(is*angel);
 329         gMC->Gspos("0SU5",is+12,"0SU4",x,y,z,0,"ONLY");
 330
 331       }
 332
 333     //Support  right side
 334
 335     z=-pstart[2]+psupport1[2];
 336     gMC->Gspos("0SU1",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
 337     gMC->Gspos("0SU2",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh vnutri
 338     z=-pstart[2]+psupport3[2];
 339     gMC->Gspos("0SU3",1,"0STR",0,0,z,0,"ONLY"); //peredniaia kryshka
 340     z=-pstart[2]+2.*psupport1[2];
 341     gMC->Gspos("0SU4",1,"0STR",0,0,z,0,"ONLY"); //zadnaiai kryshka
 342     //Dyrki dlia feu v zadnej kryshke
 343     z=0;
 344
 345     for (is=1; is<=12; is++)
 346       {
 347         x=(6.5+7.8*TMath::Tan(5.4*3.1415/180)) *TMath::Sin(is*angel);
 348         y=(6.5+7.8*TMath::Tan(5.4*3.1415/180)) *TMath::Cos(is*angel);
 349         gMC->Gspos("0SU5",is,"0SU4",x,y,z,0,"ONLY");
 350
 351       }
 352
 353     gMC->Gspos("0SU6",1,"0INS",0,0,0,0,"ONLY");//C stakanchik dlia feu
 354     z=-psupport5[2]+psupport6[2];
 355     gMC->Gspos("0SU7",1,"0SU6",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]=5.1;
 377     par[1]=5.2;
 378     par[2]=5.8/2;
 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     Float_t parC[5];
 384     parC[0]=0.25;
 385     parC[1]=5.1;
 386     parC[2]=5.2;
 387     parC[3]=5.5;
 388     parC[4]=5.6;
 389     gMC->Gsvolu("0SC3","CONE",idtmed[kC],parC,5);
 390     z += parC[0];
 391     gMC->Gspos("0SC3",1,"0SUP",0,0,z,0,"ONLY");
 392     z += parC[0];
 393     par[0]=5.5;
 394     par[1]=5.6;
 395     par[2]=1.2/2;
 396     gMC->Gsvolu("0SC4","TUBE",idtmed[kC],par,3);
 397     z += par[2];
 398     gMC->Gspos("0SC4",1,"0SUP",0,0,z,0,"ONLY");
 399     par[0]=5.1;
 400     par[1]=5.5;
 401     par[2]=1.2/2;
 402     gMC->Gsvolu("0SA0","TUBE",idtmed[kAl],par,3);
 403     gMC->Gspos("0SA0",1,"0SUP",0,0,z,0,"ONLY");
 404     //gvozdi dlia skruchivaniia Al i C parts
 405     par[0]=5.75;
 406     par[1]=5.78;
 407     gMC->Gsvolu("0SN1","TUBE",idtmed[kSteel],par,3);
 408     gMC->Gspos("0SN1",1,"0SUP",0,0,z,0,"ONLY");
 409     z += par[2];
 410     par[0]=3.15;
 411     par[1]=5.5;
 412     par[2]=0.1;
 413     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
 414     z += par[2];
 415     gMC->Gspos("0SA1",1,"0SUP",0,0,z,0,"ONLY");
 416     z=z+par[2];
 417     par[0]=3.15;
 418     par[1]=3.16;
 419     par[2]=4.7/2;
 420     gMC->Gsvolu("0SA2","TUBE",idtmed[kAl],par,3);
 421     z += par[2];
 422     gMC->Gspos("0SA2",1,"0SUP",0,0,z,0,"ONLY");
 423     z=z+par[2];
 424     par[0]=3.16; // eta chast' prikruchena k absorberu
 425     par[1]=7.5;
 426     par[2]=0.3;
 427     gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
 428     z += par[2];
 429     gMC->Gspos("0SA3",1,"0SUP",0,0,z,0,"ONLY");
 430     par[0]=3.16; // gvozdi eta chast' prikruchena k absorberu
 431     par[1]=7.5;
 432     par[2]=0.01;
 433     gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
 434     gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"ONLY");
 435
 436
 437 }
 438 //------------------------------------------------------------------------
 439 void AliSTARTv1::CreateMaterials()
 440 {
 441    Int_t isxfld   = gAlice->Field()->Integ();
 442    Float_t sxmgmx = gAlice->Field()->Max();
 443    Float_t a,z,d,radl,absl,buf[1];
 444    Int_t nbuf;
 445
 446 // Scintillator CH
 447    Float_t ascin[2]={1.01,12.01};
 448    Float_t zscin[2]={1,6};
 449    Float_t wscin[2]={1,1};
 450    Float_t denscin=1.03;
 451 //Lucite C(CH3)CO2CH3
 452    Float_t alucite[3]={1.01,12.01,15.999};
 453    Float_t zlucite[3]={1,6,8};
 454    Float_t wlucite[3]={8,5,2};
 455    Float_t denlucite=1.16;
 456  // PMT glass SiO2
 457    Float_t aglass[2]={28.0855,15.9994};
 458    Float_t zglass[2]={14.,8.};
 459    Float_t wglass[2]={1.,2.};
 460    Float_t dglass=2.65;
 461 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 462    Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
 463    Float_t aal2o3[2]  = { 26.981539,15.9994 };
 464    Float_t zal2o3[2]  = { 13.,8. };
 465    Float_t wal2o3[2]  = { 2.,3. };
 466    Float_t denscer  = 3.6;
 467
 468 // Brass 80% Cu, 20% Zn
 469    Float_t abrass[2] = {63.546,65.39};
 470    Float_t zbrass[2] = {29,30};
 471    Float_t wbrass[2] = {0.8,0.2};
 472    Float_t denbrass=8.96;
 473
 474 //Ribber C6H12S
 475    Float_t aribber[3] = {12.,1.,32.};
 476    Float_t zribber[3] = {6.,1.,16.};
 477    Float_t wribber[3] = {6.,12.,1.};
 478    Float_t denribber=0.8;
 479 // Support inside
 480    Float_t asupport[2] = {12.,1.};
 481    Float_t zsupport[2] = {6.,1.};
 482    Float_t wsupport[2] = {1.,1.};
 483    Float_t densupport=0.1;
 484
 485 //*** Definition Of avaible START materials ***
 486    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
 487    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 488    AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999);
 489    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999);
 490    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999);
 491
 492    AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wal2o3);
 493    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 494    char namate[21]="";
 495    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 496    acer[0]=a;
 497    zcer[0]=z;
 498    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 499    acer[1]=a;
 500    zcer[1]=z;
 501
 502    AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 503    AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 504    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 505
 506    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 507    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
 508    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
 509
 510
 511    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 512    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 513    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 514    AliMedium(4, "Ceramic$", 9, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 515    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 516    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 517    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 518    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 519    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 520    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 521    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 522    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 523
 524    if(fDebug) cout<<ClassName()<<": ++++++++++++++Medium set++++++++++"<<endl;
 525
 526 }
 527 //---------------------------------------------------------------------
 528 void AliSTARTv1::DrawDetector()
 529 {
 530 //
 531 // Draw a shaded view of the Forward multiplicity detector version 0
 532 //
 533
 534   //Set ALIC mother transparent
 535   gMC->Gsatt("ALIC","SEEN",0);
 536   //
 537   //Set volumes visible
 538   //  gMC->Gsatt("0ST","SEEN",0);
 539   gMC->Gsatt("0INS","SEEN",0);
 540   gMC->Gsatt("0PMT","SEEN",1);
 541   gMC->Gsatt("0DIV","SEEN",1);
 542   //
 543   gMC->Gdopt("hide","off");
 544   gMC->Gdopt("shad","on");
 545   gMC->SetClipBox(".");
 546   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 547   gMC->DefaultRange();
 548   gMC->Gdraw("alic",40,30,0,12,9.5,.7,0.7);
 549   gMC->Gdhead(1111,"T-Zero detector");
 550   gMC->Gdopt("hide","off");
 551 }
 552
 553 //-------------------------------------------------------------------
 554 void AliSTARTv1::Init()
 555 {
 556 // Initialises version 0 of the Forward Multiplicity Detector
 557 //
 558 //Int_t *idtmed  = gAlice->Idtmed();
 559   AliSTART::Init();
 560   fIdSens1=gMC->VolId("0TOP");
 561   if(fDebug) printf("%s: *** START version 0 initialized ***\n",ClassName());
 562
 563 }
 564
 565 //-------------------------------------------------------------------
 566
 567 void AliSTARTv1::StepManager()
 568 {
 569   //
 570   // Called for every step in the START Detector
 571   //
 572   Int_t id,copy,copy1;
 573   static Float_t hits[7];
 574   static Float_t edep;
 575   static Int_t vol[2];
 576   TLorentzVector pos;
 577
 578   TClonesArray &lhits = *fHits;
 579
 580   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 581   //  Float_t charge = gMC->TrackCharge();
 582   //  if(TMath::Abs(charge)<=0.) return; //take only charged particles
 583   id=gMC->CurrentVolID(copy);
 584
 585
 586    // Check the sensetive volume
 587   if(id==fIdSens1 ) {
 588     if(gMC->IsTrackEntering()) {
 589       gMC->CurrentVolOffID(2,copy);
 590       vol[1]=copy;
 591       gMC->CurrentVolOffID(3,copy1);
 592       vol[0]=copy1;
 593
 594       gMC->TrackPosition(pos);
 595       hits[0] = pos[0];
 596       hits[1] = pos[1];
 597       hits[2] = pos[2];
 598       if(pos[2]<0) vol[0]=2;
 599       if(pos[2]>=0) vol[0]=1;
 600
 601       Float_t etot=gMC->Etot();
 602       hits[4]=etot;
 603       Int_t iPart= gMC->TrackPid();
 604       Int_t partID=gMC->IdFromPDG(iPart);
 605       hits[5]=partID;
 606       Float_t ttime=gMC->TrackTime();
 607       hits[6]=ttime*1e9;
 608       edep=0;
 609     }
 610     if(gMC->IsTrackInside())    {
 611       Float_t de=gMC->Edep();
 612       edep=edep+de;
 613     }
 614
 615     if(gMC->IsTrackExiting())   {
 616       Float_t de=gMC->Edep();
 617       edep=edep+de;
 618       hits[3]=edep*1e3;
 619       new(lhits[fNhits++]) AliSTARThit(fIshunt,gAlice->GetMCApp()->GetCurrentTrackNumber(),vol,hits);
 620     }
 621   }
 622 //---------------------------------------------------------------------
 623 }
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