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
  45 ClassImp(AliSTARTv1)
  46
  47 //--------------------------------------------------------------------
  48 AliSTARTv1::AliSTARTv1(const char *name, const char *title):
  49  AliSTART(name,title)
  50 {
  51   //
  52   // Standart constructor for START Detector version 0
  53   //
  54   fIdSens1=0;
  55 //  setBufferSize(128000);
  56 }
  57 //-------------------------------------------------------------------------
  58 void AliSTARTv1::CreateGeometry()
  59 {
  60   //
  61   // Create the geometry of START Detector version 0
  62   //
  63   // begin Html
  64   /*
  65    <img src="gif/AliSTARTv0.gif">
  66   */
  67   //
  68
  69
  70   Int_t *idtmed = fIdtmed->GetArray();
  71
  72   Int_t is;
  73   Int_t idrotm[999];
  74   Float_t x,y,z;
  75
  76   Float_t pstart[3]={4.5,10.,4.0};
  77   Float_t pinstart[3]={0.,1.6,6.5};
  78   Float_t ppmt[3]={0.,1.3,3.5};
  79   Float_t pdivider[3]={0.,1.2,1.75};
  80   Float_t pdiv2[3]={0.,1.2,1.25};
  81   Float_t pdiv1[3]={0.6,1.2,0.5};
  82   Float_t ptop[3]={0.,1.3,1.5};
  83   Float_t pbot[3]={0.6,1.2,0.1};
  84   Float_t pglass[3]={1.2,1.3,2.};
  85   Float_t pcer[3]={0.9,1.1,0.09};
  86   Float_t psteel[3]={0.9,1.1,0.01};
  87   Float_t ppins[3]={0.6,1.2,0.014};
  88   Float_t phole[3]={0.6,1.2,0.015};
  89   Float_t pknob[3]={0.5,0.6,0.4};
  90   Float_t pknob_vac[3]={0.,0.5,0.4};
  91   Float_t pknob_bot[3]={0.,0.6,0.05};
  92   Float_t pribber[3] = {0.,1.2,2.413/2.};
  93   Float_t presist[3] = {0.,1.2,0.087/2.};
  94   Float_t psupport1[3] = {4.5,4.6,4.0};//C kozhuh vnutri
  95   Float_t psupport2[3] = {9.4,9.5,4.0};// snaruzhi  C
  96   Float_t psupport3[3] = {4.5,9.5,0.05};//kryshki  C
  97   Float_t psupport4[3] = {0,1.6,0.05};// dyrki dlia feu v zadnej kryshke Air
  98   Float_t psupport5[3] = {1.54,1.6,6.5}; // stakanchik dlai feu  C
  99   Float_t psupport6[3] = {0,1.6,0.05}; //kryshechka stakanchika  Al
 100   Float_t psupport7[3] = {1.5,1.6,0.6}; //kolechko snaruzhu stakanchika Al
 101   // Mother Volume katushka dlia krepezha vokrug truby k Absorbru
 102   Float_t ppcon[70];
 103     ppcon[0]  =   0;
 104     ppcon[1]  = 360;
 105     ppcon[2]  =  15;
 106 //  1:
 107     ppcon[3]  =  14.1/2;
 108     ppcon[4]  =   4.4;
 109     ppcon[5]  =   4.5;
 110 //  2
 111     ppcon[6]  = ppcon[3]+1.;
 112     ppcon[7]  =   4.4;
 113     ppcon[8]  =   4.5;
 114 //  3
 115     ppcon[9]  = ppcon[6];
 116     ppcon[10] =   4.4;
 117     ppcon[11] =   5.3;
 118
 119 //  4
 120
 121     ppcon[12]  = ppcon[9]+0.1;
 122     ppcon[13] =   4.4;
 123     ppcon[14] =   5.3;
 124 //  5
 125
 126     ppcon[15]  = ppcon[12];
 127     ppcon[16] =   5.1;
 128     ppcon[17] =   5.3;
 129
 130 //  6
 131     ppcon[18]  = ppcon[12]+5.8;
 132     ppcon[19] =   5.1;
 133     ppcon[20] =   5.3;
 134
 135 //  7
 136     ppcon[21]  = ppcon[18];
 137     ppcon[22] =   5.1;
 138     ppcon[23] =   5.9;
 139
 140 //  8
 141     ppcon[24]  = ppcon[21]+1.5;
 142     ppcon[25] =   5.1;
 143     ppcon[26] =   5.9;
 144 //  9
 145     ppcon[27]  = ppcon[24]+0.5;
 146     ppcon[28] =   5.1;
 147     ppcon[29] =   5.9;
 148
 149 //  10
 150     ppcon[30]  = ppcon[24]+0.5;
 151     ppcon[31] =   3.15;
 152     ppcon[32] =   5.9;
 153
 154 //  11
 155     ppcon[33]  = ppcon[30];
 156     ppcon[34] =   3.15;
 157     ppcon[35] =   5.9;
 158 //  12
 159     ppcon[36]  = ppcon[30];
 160     ppcon[37] =   3.15;
 161     ppcon[38] =   3.25;
 162
 163 //  13
 164     ppcon[39]  = ppcon[36]+4.5;
 165     ppcon[40] =   3.15;
 166     ppcon[41] =   3.25;
 167 //  14
 168     ppcon[42]  = ppcon[36]+4.5;
 169     ppcon[43] =   3.15;
 170     ppcon[44] =   7.6;
 171 //  15
 172     ppcon[45]  = ppcon[42]+0.9;
 173     ppcon[46] =   3.15;
 174     ppcon[47] =   7.6;
 175
 176     gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,48);
 177     z=69.7; //+14.1/2;
 178     gMC->Gspos("0SUP",1, "ALIC", 0,0,z,0,"ONLY");
 179
 180   Float_t zdetRight=69.7,zdetLeft=350;
 181  //-------------------------------------------------------------------
 182  //  START volume
 183  //-------------------------------------------------------------------
 184
 185     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
 186
 187     gMC->Gsvolu("0STR","TUBE",idtmed[kAir],pstart,3);
 188     gMC->Gsvolu("0STL","TUBE",idtmed[kAir],pstart,3);
 189     gMC->Gspos("0STR",1,"ALIC",0.,0.,zdetRight+pstart[2],0,"ONLY");
 190     gMC->Gspos("0STL",1,"ALIC",0.,0.,-zdetLeft-pstart[2],idrotm[901],"ONLY");
 191
 192 //START interior
 193     gMC->Gsvolu("0INS","TUBE",idtmed[kAir],pinstart,3);
 194     gMC->Gsvolu("0PMT","TUBE",idtmed[kVac],ppmt,3);
 195     gMC->Gsvolu("0DIV","TUBE",idtmed[kVac],pdivider,3);
 196     gMC->Gsvolu("0SU1","TUBE",idtmed[kC],psupport1,3);//C kozhuh vnutri
 197     gMC->Gsvolu("0SU2","TUBE",idtmed[kC],psupport2,3);// snaruzhi  C
 198     gMC->Gsvolu("0SU3","TUBE",idtmed[kC],psupport3,3);//kryshka perednaiai  C
 199     gMC->Gsvolu("0SU4","TUBE",idtmed[kC],psupport3,3);//kryshka zadnaiai  C
 200     gMC->Gsvolu("0SU5","TUBE",idtmed[kAir],psupport4,3);// dyrki dlia feu v zadnej kryshke Air
 201     cout<<" 0Su6 >> "<<psupport5[0]<<" "<<psupport5[1]<<" "<<psupport5[2]<<endl;
 202     gMC->Gsvolu("0SU6","TUBE",idtmed[kC],psupport5,3);// stakanchik dlai feu  C
 203     gMC->Gsvolu("0SU7","TUBE",idtmed[kAl],psupport6,3);//kryshechka stakanchika  Al
 204     gMC->Gsvolu("0SU8","TUBE",idtmed[kAl],psupport7,3);//kolechko snaruzhu stakanchika Al
 205
 206 // first ring: 12 units of Scintillator+PMT+divider
 207   Float_t  theta  = (180 / TMath::Pi()) * TMath::ATan(6.5 / zdetRight);
 208   Float_t angel  = 2 * TMath::Pi() / 12;
 209   Float_t phi[3];
 210    for (is=0; is<12; is++)
 211       {
 212
 213         x = 6.5 * TMath::Sin(is * angel);
 214         y = 6.5 * TMath::Cos(is * angel);
 215
 216      phi[0] = -30 * is;
 217      phi[1] = 90 - is * 30;
 218      phi[2] = 90 - is * 30;
 219      for (Int_t j = 0; j < 3; j++)
 220         if (phi[j] < 0)  phi[j] += 360;
 221
 222      AliMatrix (idrotm[902 + is], 90.,         phi[0],
 223                                  90. + theta, phi[1],
 224                                  theta,       phi[2]);
 225         z=-pstart[2]+pinstart[2]+0.2;
 226      gMC->Gspos ("0INS", is + 1, "0STR", x, y, z, idrotm[902 + is], "ONLY");
 227      gMC->Gspos ("0INS", is + 13, "0STL", x, y, z, 0, "ONLY");
 228       }
 229
 230
 231       x=0;
 232     y=0;
 233     z=-pinstart[2]+ppmt[2]+2.*psupport6[2];
 234     gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
 235     z=z+pdivider[2]+ppmt[2];
 236     gMC->Gspos("0DIV",1,"0INS",x,y,z,0,"ONLY");
 237
 238 // PMT
 239
 240     // Entry window (glass)
 241     gMC->Gsvolu("0TOP","TUBE",idtmed[kGlass],ptop,3); //glass
 242      //   gMC->Gsvolu("0TOP","TUBE",idtmed[12],ptop,3); //lucite
 243      z=-ppmt[2]+ptop[2];
 244     gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
 245     //     printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
 246
 247     // Bottom glass
 248     gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
 249     z=ppmt[2]-pbot[2];
 250     if(fDebug) printf("%s: Z bottom %f\n",ClassName(),z);
 251     gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
 252     // Side cylinder glass
 253     gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
 254     z=ppmt[2]-pglass[2];
 255     //      printf("Z glass %f\n",z);
 256     gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
 257     //PMT electrodes support structure
 258     gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
 259     gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
 260     z=-ppmt[2]+2*ptop[2]+0.3;;
 261     //      printf("Z Cer 1 %f\n",z);
 262     for (is=1; is<=15; is++)
 263       {
 264         z=z+psteel[2]+pcer[2];
 265         gMC->Gspos("0CER",is,"0PMT",0,0,z,0,"ONLY");
 266         z=z+psteel[2]+pcer[2];
 267         gMC->Gspos("0STE",is,"0PMT",0,0,z,0,"ONLY");
 268       }
 269
 270     // Divider
 271     // Knob at the bottom of PMT baloon
 272
 273     gMC->Gsvolu("0NB","TUBE",idtmed[6],pknob,3);
 274     z=-pdivider[2]+pknob[2];
 275     //      printf("zknob %f\n",z);
 276     gMC->Gspos("0NB",1,"0DIV",0,0,z,0,"ONLY");
 277     gMC->Gsvolu("0KB","TUBE",idtmed[kGlass],pknob_bot,3);
 278     z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
 279     //      printf(knobbot %f\n",z);
 280     gMC->Gspos("0KB",1,"0DIV ",0,0,z,0,"ONLY");
 281     gMC->Gsvolu("0VAC","TUBE",idtmed[kVac],pknob_vac,3);
 282     z=-pdivider[2]+pknob_vac[2];
 283     //      printf("knobvac %f\n",z);
 284     gMC->Gspos("0VAC",1,"0DIV",0,0,z,0,"ONLY");
 285     //Steel pins + pin holes
 286     gMC->Gsvolu("0PIN","TUBE",idtmed[kSteel],ppins,3);
 287     z=-pdivider[2]+ppins[2];
 288     gMC->Gspos("0PIN",1,"0DIV",0,0,z,0,"ONLY");
 289     gMC->Gsvolu("0HOL","TUBE",idtmed[kBrass],phole,3);
 290     z=-pdivider[2]+2*ppins[2]+phole[2];
 291     gMC->Gspos("0HOL",1,"0DIV",0,0,z,0,"ONLY");
 292
 293     //Socket
 294     gMC->Gsvolu("0V1","TUBE",idtmed[kCer],pdiv1,3);
 295     z=-pdivider[2]+pdiv1[2];
 296     gMC->Gspos("0V1",1,"0DIV",0,0,z,0,"ONLY");
 297     //Resistors
 298     gMC->Gsvolu("0V2","TUBE",idtmed[kAir],pdiv2,3);
 299     z=pdivider[2]-pdiv2[2];
 300     gMC->Gspos("0V2",1,"0DIV",0,0,z,0,"ONLY");
 301     gMC->Gsvolu("0RS","TUBE",idtmed[kCer],presist,3);
 302     z=-pdiv2[2]+presist[2];
 303     gMC->Gspos("0RS",1,"0V2",0,0,z,0,"ONLY");
 304     gMC->Gsvolu("0RB","TUBE",idtmed[kRibber],pribber,3);
 305     z=pdiv2[2]-pribber[2];
 306     gMC->Gspos("0RB",1,"0V2",0,0,z,0,"ONLY");
 307
 308
 309     //Support  left side
 310
 311     z=-pstart[2]+psupport1[2];
 312     gMC->Gspos("0SU1",2,"0STL",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
 313     gMC->Gspos("0SU2",2,"0STL",0,0,z,0,"ONLY"); //C kozhuh vnutri
 314     z=-pstart[2]+psupport3[2];
 315     gMC->Gspos("0SU3",2,"0STL",0,0,z,0,"ONLY"); //peredniaia kryshka
 316     z=-pstart[2]+2.*psupport1[2];
 317     gMC->Gspos("0SU4",2,"0STL",0,0,z,0,"ONLY"); //zadnaiai kryshka
 318     //Dyrki dlia feu v zadnej kryshke
 319     z=0;
 320
 321     for (is=1; is<=12; is++)
 322       {
 323         x=6.5*TMath::Sin(is*angel);
 324         y=6.5 *TMath::Cos(is*angel);
 325         gMC->Gspos("0SU5",is+12,"0SU4",x,y,z,0,"ONLY");
 326
 327       }
 328
 329     //Support  right side
 330
 331     z=-pstart[2]+psupport1[2];
 332     gMC->Gspos("0SU1",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
 333     gMC->Gspos("0SU2",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh vnutri
 334     z=-pstart[2]+psupport3[2];
 335     gMC->Gspos("0SU3",1,"0STR",0,0,z,0,"ONLY"); //peredniaia kryshka
 336     z=-pstart[2]+2.*psupport1[2];
 337     gMC->Gspos("0SU4",1,"0STR",0,0,z,0,"ONLY"); //zadnaiai kryshka
 338     //Dyrki dlia feu v zadnej kryshke
 339     z=0;
 340
 341     for (is=1; is<=12; is++)
 342       {
 343         x=(6.5+7.8*TMath::Tan(5.4*3.1415/180)) *TMath::Sin(is*angel);
 344         y=(6.5+7.8*TMath::Tan(5.4*3.1415/180)) *TMath::Cos(is*angel);
 345         gMC->Gspos("0SU5",is,"0SU4",x,y,z,0,"ONLY");
 346
 347       }
 348
 349     gMC->Gspos("0SU6",1,"0INS",0,0,0,0,"ONLY");//C stakanchik dlia feu
 350     z=-psupport5[2]+psupport6[2];
 351     gMC->Gspos("0SU7",1,"0SU6",0,0,z,0,"ONLY"); //Al kryshechka
 352
 353     z=pinstart[2]-psupport7[2];
 354     gMC->Gspos("0SU8",1,"0SU6",0,0,z,0,"ONLY"); //Al kolechko
 355
 356
 357     Float_t par[3];
 358     par[0]=4.4;
 359     par[1]=4.5;
 360     par[2]=0.5;
 361     gMC->Gsvolu("0SC0","TUBE",idtmed[kC],par,3);
 362     z=ppcon[3]+par[2];
 363     gMC->Gspos("0SC0",1,"0SUP",0,0,z,0,"ONLY");
 364     z += par[2];
 365     par[0]=4.4;
 366     par[1]=5.1;
 367     par[2]=0.05;
 368     gMC->Gsvolu("0SC1","TUBE",idtmed[kC],par,3);
 369     z += par[2];
 370     gMC->Gspos("0SC1",1,"0SUP",0,0,z,0,"ONLY");
 371     z=z+par[2];
 372     par[0]=5.1;
 373     par[1]=5.2;
 374     par[2]=5.8/2;
 375     gMC->Gsvolu("0SC2","TUBE",idtmed[kC],par,3);
 376     z += par[2];
 377     gMC->Gspos("0SC2",1,"0SUP",0,0,z,0,"ONLY");
 378     z += par[2];
 379     Float_t parC[5];
 380     parC[0]=0.25;
 381     parC[1]=5.1;
 382     parC[2]=5.2;
 383     parC[3]=5.5;
 384     parC[4]=5.6;
 385     gMC->Gsvolu("0SC3","CONE",idtmed[kC],parC,5);
 386     z += parC[0];
 387     gMC->Gspos("0SC3",1,"0SUP",0,0,z,0,"ONLY");
 388     z += parC[0];
 389     par[0]=5.5;
 390     par[1]=5.6;
 391     par[2]=1.2/2;
 392     gMC->Gsvolu("0SC4","TUBE",idtmed[kC],par,3);
 393     z += par[2];
 394     gMC->Gspos("0SC4",1,"0SUP",0,0,z,0,"ONLY");
 395     par[0]=5.1;
 396     par[1]=5.5;
 397     par[2]=1.2/2;
 398     gMC->Gsvolu("0SA0","TUBE",idtmed[kAl],par,3);
 399     gMC->Gspos("0SA0",1,"0SUP",0,0,z,0,"ONLY");
 400     //gvozdi dlia skruchivaniia Al i C parts
 401     par[0]=5.75;
 402     par[1]=5.78;
 403     gMC->Gsvolu("0SN1","TUBE",idtmed[kSteel],par,3);
 404     gMC->Gspos("0SN1",1,"0SUP",0,0,z,0,"ONLY");
 405     z += par[2];
 406     par[0]=3.15;
 407     par[1]=5.5;
 408     par[2]=0.1;
 409     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
 410     z += par[2];
 411     gMC->Gspos("0SA1",1,"0SUP",0,0,z,0,"ONLY");
 412     z=z+par[2];
 413     par[0]=3.15;
 414     par[1]=3.16;
 415     par[2]=4.7/2;
 416     gMC->Gsvolu("0SA2","TUBE",idtmed[kAl],par,3);
 417     z += par[2];
 418     gMC->Gspos("0SA2",1,"0SUP",0,0,z,0,"ONLY");
 419     z=z+par[2];
 420     par[0]=3.16; // eta chast' prikruchena k absorberu
 421     par[1]=7.5;
 422     par[2]=0.3;
 423     gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
 424     z += par[2];
 425     gMC->Gspos("0SA3",1,"0SUP",0,0,z,0,"ONLY");
 426     par[0]=3.16; // gvozdi eta chast' prikruchena k absorberu
 427     par[1]=7.5;
 428     par[2]=0.01;
 429     gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
 430     gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"ONLY");
 431
 432
 433 }
 434 //------------------------------------------------------------------------
 435 void AliSTARTv1::CreateMaterials()
 436 {
 437    Int_t isxfld   = gAlice->Field()->Integ();
 438    Float_t sxmgmx = gAlice->Field()->Max();
 439    Float_t a,z,d,radl,absl,buf[1];
 440    Int_t nbuf;
 441
 442 // Scintillator CH
 443    Float_t ascin[2]={1.01,12.01};
 444    Float_t zscin[2]={1,6};
 445    Float_t wscin[2]={1,1};
 446    Float_t denscin=1.03;
 447 //Lucite C(CH3)CO2CH3
 448    Float_t alucite[3]={1.01,12.01,15.999};
 449    Float_t zlucite[3]={1,6,8};
 450    Float_t wlucite[3]={8,5,2};
 451    Float_t denlucite=1.16;
 452  // PMT glass SiO2
 453    Float_t aglass[2]={28.0855,15.9994};
 454    Float_t zglass[2]={14.,8.};
 455    Float_t wglass[2]={1.,2.};
 456    Float_t dglass=2.65;
 457 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 458    Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
 459    Float_t aal2o3[2]  = { 26.981539,15.9994 };
 460    Float_t zal2o3[2]  = { 13.,8. };
 461    Float_t wal2o3[2]  = { 2.,3. };
 462    Float_t denscer  = 3.6;
 463
 464 // Brass 80% Cu, 20% Zn
 465    Float_t abrass[2] = {63.546,65.39};
 466    Float_t zbrass[2] = {29,30};
 467    Float_t wbrass[2] = {0.8,0.2};
 468    Float_t denbrass=8.96;
 469
 470 //Ribber C6H12S
 471    Float_t aribber[3] = {12.,1.,32.};
 472    Float_t zribber[3] = {6.,1.,16.};
 473    Float_t wribber[3] = {6.,12.,1.};
 474    Float_t denribber=0.8;
 475 // Support inside
 476    Float_t asupport[2] = {12.,1.};
 477    Float_t zsupport[2] = {6.,1.};
 478    Float_t wsupport[2] = {1.,1.};
 479    Float_t densupport=0.1;
 480
 481 //*** Definition Of avaible START materials ***
 482    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
 483    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 484    AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999);
 485    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999);
 486    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999);
 487
 488    AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wal2o3);
 489    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 490    char namate[21];
 491    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 492    acer[0]=a;
 493    zcer[0]=z;
 494    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 495    acer[1]=a;
 496    zcer[1]=z;
 497
 498    AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 499    AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 500    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 501
 502    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 503    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
 504    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
 505
 506
 507    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 508    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 509    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 510    AliMedium(4, "Ceramic$", 9, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 511    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 512    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 513    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 514    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 515    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 516    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 517    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 518    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 519
 520    if(fDebug) cout<<ClassName()<<": ++++++++++++++Medium set++++++++++"<<endl;
 521
 522 }
 523 //---------------------------------------------------------------------
 524 void AliSTARTv1::DrawDetector()
 525 {
 526 //
 527 // Draw a shaded view of the Forward multiplicity detector version 0
 528 //
 529
 530   //Set ALIC mother transparent
 531   gMC->Gsatt("ALIC","SEEN",0);
 532   //
 533   //Set volumes visible
 534   //  gMC->Gsatt("0ST","SEEN",0);
 535   gMC->Gsatt("0INS","SEEN",0);
 536   gMC->Gsatt("0PMT","SEEN",1);
 537   gMC->Gsatt("0DIV","SEEN",1);
 538   //
 539   gMC->Gdopt("hide","off");
 540   gMC->Gdopt("shad","on");
 541   gMC->SetClipBox(".");
 542   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 543   gMC->DefaultRange();
 544   gMC->Gdraw("alic",40,30,0,12,9.5,.7,0.7);
 545   gMC->Gdhead(1111,"T-Zero detector");
 546   gMC->Gdopt("hide","off");
 547 }
 548
 549 //-------------------------------------------------------------------
 550 void AliSTARTv1::Init()
 551 {
 552 // Initialises version 0 of the Forward Multiplicity Detector
 553 //
 554 //Int_t *idtmed  = gAlice->Idtmed();
 555   AliSTART::Init();
 556   fIdSens1=gMC->VolId("0TOP");
 557   if(fDebug) printf("%s: *** START version 0 initialized ***\n",ClassName());
 558
 559 }
 560
 561 //-------------------------------------------------------------------
 562
 563 void AliSTARTv1::StepManager()
 564 {
 565   //
 566   // Called for every step in the START Detector
 567   //
 568   Int_t id,copy,copy1;
 569   static Float_t hits[7];
 570   static Float_t edep;
 571   static Int_t vol[2];
 572   TLorentzVector pos;
 573
 574   TClonesArray &lhits = *fHits;
 575
 576   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 577   //  Float_t charge = gMC->TrackCharge();
 578   //  if(TMath::Abs(charge)<=0.) return; //take only charged particles
 579   id=gMC->CurrentVolID(copy);
 580
 581
 582    // Check the sensetive volume
 583   if(id==fIdSens1 ) {
 584     if(gMC->IsTrackEntering()) {
 585       gMC->CurrentVolOffID(2,copy);
 586       vol[1]=copy;
 587       gMC->CurrentVolOffID(3,copy1);
 588       vol[0]=copy1;
 589
 590       gMC->TrackPosition(pos);
 591       hits[0] = pos[0];
 592       hits[1] = pos[1];
 593       hits[2] = pos[2];
 594       if(pos[2]<0) vol[0]=2;
 595       if(pos[2]>=0) vol[0]=1;
 596
 597       Float_t etot=gMC->Etot();
 598       hits[4]=etot;
 599       Int_t iPart= gMC->TrackPid();
 600       Int_t partID=gMC->IdFromPDG(iPart);
 601       hits[5]=partID;
 602       Float_t ttime=gMC->TrackTime();
 603       hits[6]=ttime*1e9;
 604       edep=0;
 605     }
 606     if(gMC->IsTrackInside())    {
 607       Float_t de=gMC->Edep();
 608       edep=edep+de;
 609     }
 610
 611     if(gMC->IsTrackExiting())   {
 612       Float_t de=gMC->Edep();
 613       edep=edep+de;
 614       hits[3]=edep*1e3;
 615       new(lhits[fNhits++]) AliSTARThit(fIshunt,gAlice->CurrentTrack(),vol,hits);
 616     }
 617   }
 618 //---------------------------------------------------------------------
 619 }
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