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 pstartR[18]={0., 360., 5.,
  78                        -76.5+0.00+69.7, 4.25, 10.,
  79                        -76.5+6.05+69.7, 4.5, 10.,
  80                        -76.5+8.05+69.7, 4.5, 10.,
  81                        -76.5+8.05+69.7, 5.1, 10.,
  82                        -62.9+0.00+69.7, 5.1, 10.};
  83
  84   Float_t pstart[3]={4.3, 10.,6.8};
  85   Float_t pinstart[3]={0.,1.6,6.5};
  86   Float_t ppmt[3]={0.,1.3,3.5};
  87   Float_t pdivider[3]={0.,1.2,1.75};
  88   Float_t pdiv2[3]={0.,1.2,1.25};
  89   Float_t pdiv1[3]={0.6,1.2,0.5};
  90   Float_t ptop[3]={0.,1.3,1.5};
  91   Float_t pbot[3]={0.6,1.2,0.1};
  92   Float_t pglass[3]={1.2,1.3,2.};
  93   Float_t pcer[3]={0.9,1.1,0.09};
  94   Float_t psteel[3]={0.9,1.1,0.01};
  95   Float_t ppins[3]={0.6,1.2,0.014};
  96   Float_t phole[3]={0.6,1.2,0.015};
  97   Float_t pknob[3]={0.5,0.6,0.4};
  98   Float_t pknob_vac[3]={0.,0.5,0.4};
  99   Float_t pknob_bot[3]={0.,0.6,0.05};
 100   Float_t pribber[3] = {0.,1.2,2.413/2.};
 101   Float_t presist[3] = {0.,1.2,0.087/2.};
 102   Float_t psupport1[3] = {4.51,4.6,4.0};//C kozhuh vnutri
 103   Float_t psupport2[3] = {9.4,9.5,4.0};// snaruzhi  C
 104   Float_t psupport3[3] = {4.51,9.5,0.05};//kryshki  C
 105   Float_t psupport4[3] = {0,1.6,0.05};// dyrki dlia feu v zadnej kryshke Air
 106   Float_t psupport5[3] = {1.44,1.5,6.5}; // stakanchik dlai feu  C
 107   Float_t psupport6[3] = {0,1.5,0.05}; //kryshechka stakanchika  Al
 108   Float_t psupport7[3] = {1.5,1.6,0.6}; //kolechko snaruzhu stakanchika Al
 109   // Mother Volume katushka dlia krepezha vokrug truby k Absorbru
 110     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
 111   Float_t ppcon[70];
 112     ppcon[0]  =   0;
 113     ppcon[1]  = 360;
 114     ppcon[2]  =  13;
 115 //  1:
 116     ppcon[3]  =  14.1/2;
 117     ppcon[4]  =   4.4;
 118     ppcon[5]  =   4.5;
 119 //  2
 120     ppcon[6]  = ppcon[3]+1.;
 121     ppcon[7]  =   4.4;
 122     ppcon[8]  =   4.5;
 123 //  3
 124     ppcon[9]  = ppcon[6];
 125     ppcon[10] =   4.4;
 126     ppcon[11] =   5.1;
 127
 128 //  4
 129
 130     ppcon[12]  = ppcon[9]+0.1;
 131     ppcon[13] =   4.4;
 132     ppcon[14] =   5.1;
 133 //  5
 134
 135     ppcon[15]  = ppcon[12];
 136     ppcon[16] =   4.9;
 137     ppcon[17] =   5.1;
 138
 139 //  6
 140     ppcon[18]  = ppcon[15]+7.05;
 141     ppcon[19] =   4.9;
 142     ppcon[20] =   5.1;
 143
 144 //  7
 145     ppcon[21]  = ppcon[18];
 146     ppcon[22] =   4.9;
 147     ppcon[23] =   5.1;
 148
 149 /// 8
 150     ppcon[24]  = ppcon[21]+0.01;
 151     ppcon[25] =   3.15;
 152     ppcon[26] =   3.25;
 153
 154 /// 9
 155     ppcon[27]  = ppcon[24];
 156     ppcon[28] =   3.15;
 157     ppcon[29] =   3.25;
 158
 159 //  10
 160     ppcon[30]  = ppcon[27]+4.5;
 161     ppcon[31] =   3.15;
 162     ppcon[32] =   3.25;
 163
 164 //  11
 165     ppcon[33] = ppcon[30];
 166     ppcon[34] =   3.15;
 167     ppcon[35] =   3.25;
 168
 169 //  12
 170     ppcon[36]  = ppcon[33];
 171     ppcon[37] =   3.15;
 172     ppcon[38] =   7.6;
 173
 174 //  13
 175     ppcon[39]  = ppcon[33]+0.4;
 176     ppcon[40] =   3.15;
 177     ppcon[41] =   7.6;
 178
 179 //  14
 180 //    ppcon[39]  = ppcon[36];
 181 //    ppcon[40] =   3.15;
 182 //    ppcon[41] =   7.6;
 183
 184     gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,42);
 185     z=-69.7;//-14.1/2;
 186     gMC->Gspos("0SUP",1,"ALIC",0.,0.,z,idrotm[901],"ONLY");
 187
 188
 189    Float_t zdetRight=69.7,zdetLeft=350;
 190  //-------------------------------------------------------------------
 191  //  START volume
 192  //-------------------------------------------------------------------
 193
 194
 195     gMC->Gsvolu("0STR","PCON",idtmed[kAir],pstartR,18);
 196     gMC->Gsvolu("0STL","TUBE",idtmed[kAir],pstart,3);
 197     gMC->Gspos("0STR",1,"ALIC",0.,0.,-zdetRight-pstart[2],idrotm[901],"ONLY");
 198     gMC->Gspos("0STL",1,"ALIC",0.,0.,zdetLeft+pstart[2],0,"ONLY");
 199
 200 //START interior
 201     gMC->Gsvolu("0INS","TUBE",idtmed[kAir],pinstart,3);
 202     gMC->Gsvolu("0PMT","TUBE",idtmed[kVac],ppmt,3);
 203     gMC->Gsvolu("0DIV","TUBE",idtmed[kVac],pdivider,3);
 204     gMC->Gsvolu("0SU1","TUBE",idtmed[kC],psupport1,3);//C kozhuh vnutri
 205     gMC->Gsvolu("0SU2","TUBE",idtmed[kC],psupport2,3);// snaruzhi  C
 206     gMC->Gsvolu("0SU3","TUBE",idtmed[kC],psupport3,3);//kryshka perednaiai  C
 207     gMC->Gsvolu("0SU4","TUBE",idtmed[kC],psupport3,3);//kryshka zadnaiai  C
 208     gMC->Gsvolu("0SU5","TUBE",idtmed[kAir],psupport4,3);// dyrki dlia feu v zadnej kryshke Air
 209     cout<<" 0Su6 >> "<<psupport5[0]<<" "<<psupport5[1]<<" "<<psupport5[2]<<endl;
 210     gMC->Gsvolu("0SU6","TUBE",idtmed[kC],psupport5,3);// stakanchik dlai feu  C
 211     gMC->Gsvolu("0SU7","TUBE",idtmed[kAl],psupport6,3);//kryshechka stakanchika  Al
 212     gMC->Gsvolu("0SU8","TUBE",idtmed[kAl],psupport7,3);//kolechko snaruzhu stakanchika Al
 213
 214 // first ring: 12 units of Scintillator+PMT+divider
 215   Float_t  theta  = (180 / TMath::Pi()) * TMath::ATan(6.5 / zdetRight);
 216   Float_t angel  = 2 * TMath::Pi() / 12;
 217   Float_t phi[3];
 218
 219    for (is=0; is<12; is++)
 220       {
 221
 222         x = 6.5 * TMath::Sin(is * angel);
 223         y = 6.5 * TMath::Cos(is * angel);
 224
 225      phi[0] = -30 * is;
 226      phi[1] = 90 - is * 30;
 227      phi[2] = 90 - is * 30;
 228      for (Int_t j = 0; j < 3; j++)
 229         if (phi[j] < 0)  phi[j] += 360;
 230
 231      AliMatrix (idrotm[902 + is], 90.,         phi[0],
 232                                  90. + theta, phi[1],
 233                                  theta,       phi[2]);
 234         z=-pstart[2]+pinstart[2]+0.2;
 235      gMC->Gspos ("0INS", is + 1, "0STR", x, y, z, idrotm[902 + is], "ONLY");
 236      gMC->Gspos ("0INS", is + 13, "0STL", x, y, z, 0, "ONLY");
 237       }
 238
 239
 240       x=0;
 241     y=0;
 242     z=-pinstart[2]+ppmt[2]+2.*psupport6[2]+0.1;
 243     gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
 244     z=z+pdivider[2]+ppmt[2];
 245     gMC->Gspos("0DIV",1,"0INS",x,y,z,0,"ONLY");
 246
 247 // PMT
 248
 249     // Entry window (glass)
 250     gMC->Gsvolu("0TOP","TUBE",idtmed[kGlass],ptop,3); //glass
 251      //   gMC->Gsvolu("0TOP","TUBE",idtmed[12],ptop,3); //lucite
 252      z=-ppmt[2]+ptop[2];
 253     gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
 254     //     printf("Z PTOP %f -ppmt[2] %f ptop[2] %f\n",z,-ppmt[2],ptop[2]);
 255
 256     // Bottom glass
 257     gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
 258     z=ppmt[2]-pbot[2];
 259     if(fDebug) printf("%s: Z bottom %f\n",ClassName(),z);
 260     gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
 261     // Side cylinder glass
 262     gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
 263     z=ppmt[2]-pglass[2];
 264     //      printf("Z glass %f\n",z);
 265     gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
 266     //PMT electrodes support structure
 267     gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
 268     gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
 269     z=-ppmt[2]+2*ptop[2]+0.3;;
 270     //      printf("Z Cer 1 %f\n",z);
 271     for (is=1; is<=15; is++)
 272       {
 273         z=z+psteel[2]+pcer[2];
 274         gMC->Gspos("0CER",is,"0PMT",0,0,z,0,"ONLY");
 275         z=z+psteel[2]+pcer[2];
 276         gMC->Gspos("0STE",is,"0PMT",0,0,z,0,"ONLY");
 277       }
 278
 279     // Divider
 280     // Knob at the bottom of PMT baloon
 281
 282     gMC->Gsvolu("0NB","TUBE",idtmed[6],pknob,3);
 283     z=-pdivider[2]+pknob[2];
 284     //      printf("zknob %f\n",z);
 285     gMC->Gspos("0NB",1,"0DIV",0,0,z,0,"ONLY");
 286     gMC->Gsvolu("0KB","TUBE",idtmed[kGlass],pknob_bot,3);
 287     z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
 288     //      printf(knobbot %f\n",z);
 289     gMC->Gspos("0KB",1,"0DIV ",0,0,z,0,"ONLY");
 290     gMC->Gsvolu("0VAC","TUBE",idtmed[kVac],pknob_vac,3);
 291     z=-pdivider[2]+pknob_vac[2];
 292     //      printf("knobvac %f\n",z);
 293     gMC->Gspos("0VAC",1,"0DIV",0,0,z,0,"ONLY");
 294     //Steel pins + pin holes
 295     gMC->Gsvolu("0PIN","TUBE",idtmed[kSteel],ppins,3);
 296     z=-pdivider[2]+ppins[2];
 297     gMC->Gspos("0PIN",1,"0DIV",0,0,z,0,"ONLY");
 298     gMC->Gsvolu("0HOL","TUBE",idtmed[kBrass],phole,3);
 299     z=-pdivider[2]+2*ppins[2]+phole[2];
 300     gMC->Gspos("0HOL",1,"0DIV",0,0,z,0,"ONLY");
 301
 302     //Socket
 303     gMC->Gsvolu("0V1","TUBE",idtmed[kCer],pdiv1,3);
 304     z=-pdivider[2]+pdiv1[2];
 305     gMC->Gspos("0V1",1,"0DIV",0,0,z,0,"ONLY");
 306     //Resistors
 307     gMC->Gsvolu("0V2","TUBE",idtmed[kAir],pdiv2,3);
 308     z=pdivider[2]-pdiv2[2];
 309     gMC->Gspos("0V2",1,"0DIV",0,0,z,0,"ONLY");
 310     gMC->Gsvolu("0RS","TUBE",idtmed[kCer],presist,3);
 311     z=-pdiv2[2]+presist[2];
 312     gMC->Gspos("0RS",1,"0V2",0,0,z,0,"ONLY");
 313     gMC->Gsvolu("0RB","TUBE",idtmed[kRibber],pribber,3);
 314     z=pdiv2[2]-pribber[2];
 315     gMC->Gspos("0RB",1,"0V2",0,0,z,0,"ONLY");
 316
 317
 318     //Support  left side
 319
 320     z=-pstart[2]+psupport1[2];
 321     gMC->Gspos("0SU1",2,"0STL",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
 322     gMC->Gspos("0SU2",2,"0STL",0,0,z,0,"ONLY"); //C kozhuh vnutri
 323     z=-pstart[2]+psupport3[2];
 324     gMC->Gspos("0SU3",2,"0STL",0,0,z,0,"ONLY"); //peredniaia kryshka
 325     z=-pstart[2]+2.*psupport1[2];
 326     gMC->Gspos("0SU4",2,"0STL",0,0,z,0,"ONLY"); //zadnaiai kryshka
 327     //Dyrki dlia feu v zadnej kryshke
 328     z=0;
 329
 330     for (is=1; is<=12; is++)
 331       {
 332         x=6.5*TMath::Sin(is*angel);
 333         y=6.5 *TMath::Cos(is*angel);
 334         gMC->Gspos("0SU5",is+12,"0SU4",x,y,z,0,"ONLY");
 335
 336       }
 337
 338     //Support  right side
 339
 340     z=-pstart[2]+psupport1[2]+0.1;
 341     gMC->Gspos("0SU1",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
 342     gMC->Gspos("0SU2",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh vnutri
 343     z=-pstart[2]+psupport3[2]+0.1;
 344     gMC->Gspos("0SU3",1,"0STR",0,0,z,0,"ONLY"); //peredniaia kryshka
 345     z=-pstart[2]+2.*psupport1[2]+0.1;
 346     gMC->Gspos("0SU4",1,"0STR",0,0,z,0,"ONLY"); //zadnaiai kryshka
 347     //Dyrki dlia feu v zadnej kryshke
 348     z=0;
 349
 350     for (is=1; is<=12; is++)
 351       {
 352         x=(6.5+7.8*TMath::Tan(5.4*3.1415/180)) *TMath::Sin(is*angel);
 353         y=(6.5+7.8*TMath::Tan(5.4*3.1415/180)) *TMath::Cos(is*angel);
 354         gMC->Gspos("0SU5",is,"0SU4",x,y,z,0,"ONLY");
 355
 356       }
 357
 358     gMC->Gspos("0SU6",1,"0INS",0,0,0,0,"ONLY");//C stakanchik dlia feu
 359     z=-pinstart[2]+psupport6[2];
 360     gMC->Gspos("0SU7",1,"0INS",0,0,z,0,"ONLY"); //Al kryshechka
 361
 362     z=pinstart[2]-psupport7[2];
 363     gMC->Gspos("0SU8",1,"0INS",0,0,z,0,"ONLY"); //Al kolechko
 364
 365
 366     Float_t par[3];
 367     par[0]=4.4;
 368     par[1]=4.5;
 369     par[2]=0.5;
 370     gMC->Gsvolu("0SC0","TUBE",idtmed[kC],par,3);
 371     z=ppcon[3]+par[2];
 372     gMC->Gspos("0SC0",1,"0SUP",0,0,z,0,"ONLY");
 373     z += par[2];
 374     par[0]=4.4;
 375     par[1]=5.1;
 376     par[2]=0.05;
 377     gMC->Gsvolu("0SC1","TUBE",idtmed[kC],par,3);
 378     z += par[2];
 379     gMC->Gspos("0SC1",1,"0SUP",0,0,z,0,"ONLY");
 380     z=z+par[2];
 381     par[0]=4.9;
 382     par[1]=5.0;
 383     par[2]=6.9/2;
 384     gMC->Gsvolu("0SC2","TUBE",idtmed[kC],par,3);
 385     z += par[2];
 386     gMC->Gspos("0SC2",1,"0SUP",0,0,z,0,"ONLY");
 387     z += par[2];
 388     /*
 389     Float_t parC[5];
 390     parC[0]=0.25;
 391     parC[1]=5.1;
 392     parC[2]=5.2;
 393     parC[3]=5.5;
 394     parC[4]=5.6;
 395     gMC->Gsvolu("0SC3","CONE",idtmed[kC],parC,5);
 396     z += parC[0];
 397     gMC->Gspos("0SC3",1,"0SUP",0,0,z,0,"ONLY");
 398     z += parC[0];
 399     par[0]=5
 400 .5;
 401     par[1]=5.6;
 402     par[2]=1.2/2;
 403     gMC->Gsvolu("0SC4","TUBE",idtmed[kC],par,3);
 404     z += par[2];
 405     gMC->Gspos("0SC4",1,"0SUP",0,0,z,0,"ONLY");
 406     par[0]=5.1;
 407     par[1]=5.5;
 408     par[2]=1.2/2;
 409     gMC->Gsvolu("0SA0","TUBE",idtmed[kAl],par,3);
 410     gMC->Gspos("0SA0",1,"0SUP",0,0,z,0,"ONLY");
 411     //gvozdi dlia skruchivaniia Al i C parts
 412     par[0]=5.75;
 413     par[1]=5.78;
 414     gMC->Gsvolu("0SN1","TUBE",idtmed[kSteel],par,3);
 415     gMC->Gspos("0SN1",1,"0SUP",0,0,z,0,"ONLY");
 416     z += par[2];
 417     */
 418     par[0]=3.15;
 419     par[1]=4.9;
 420     par[2]=0.1/2;
 421     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
 422
 423     z += par[2];
 424     gMC->Gspos("0SA1",1,"0SUP",0,0,z,0,"ONLY");
 425     z=z+par[2];
 426     par[0]=3.15;
 427     par[1]=3.16;
 428     par[2]=4.5/2;
 429     gMC->Gsvolu("0SA2","TUBE",idtmed[kAl],par,3);
 430     z += par[2];
 431     gMC->Gspos("0SA2",1,"0SUP",0,0,z,0,"ONLY");
 432     z=z+par[2];
 433     par[0]=3.16; // eta chast' prikruchena k absorberu
 434     par[1]=7.5;
 435     par[2]=0.2;
 436     gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
 437     z += par[2];
 438     gMC->Gspos("0SA3",1,"0SUP",0,0,z,0,"ONLY");
 439     par[0]=3.16; // gvozdi eta chast' prikruchena k absorberu
 440     par[1]=7.5;
 441     par[2]=0.01;
 442     gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
 443     gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"ONLY");
 444
 445
 446 }
 447 //------------------------------------------------------------------------
 448 void AliSTARTv1::CreateMaterials()
 449 {
 450    Int_t isxfld   = gAlice->Field()->Integ();
 451    Float_t sxmgmx = gAlice->Field()->Max();
 452    Float_t a,z,d,radl,absl,buf[1];
 453    Int_t nbuf;
 454
 455 // Scintillator CH
 456    Float_t ascin[2]={1.01,12.01};
 457    Float_t zscin[2]={1,6};
 458    Float_t wscin[2]={1,1};
 459    Float_t denscin=1.03;
 460 //Lucite C(CH3)CO2CH3
 461    Float_t alucite[3]={1.01,12.01,15.999};
 462    Float_t zlucite[3]={1,6,8};
 463    Float_t wlucite[3]={8,5,2};
 464    Float_t denlucite=1.16;
 465  // PMT glass SiO2
 466    Float_t aglass[2]={28.0855,15.9994};
 467    Float_t zglass[2]={14.,8.};
 468    Float_t wglass[2]={1.,2.};
 469    Float_t dglass=2.65;
 470 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 471    Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
 472    Float_t aal2o3[2]  = { 26.981539,15.9994 };
 473    Float_t zal2o3[2]  = { 13.,8. };
 474    Float_t wal2o3[2]  = { 2.,3. };
 475    Float_t denscer  = 3.6;
 476
 477 // Brass 80% Cu, 20% Zn
 478    Float_t abrass[2] = {63.546,65.39};
 479    Float_t zbrass[2] = {29,30};
 480    Float_t wbrass[2] = {0.8,0.2};
 481    Float_t denbrass=8.96;
 482
 483 //Ribber C6H12S
 484    Float_t aribber[3] = {12.,1.,32.};
 485    Float_t zribber[3] = {6.,1.,16.};
 486    Float_t wribber[3] = {6.,12.,1.};
 487    Float_t denribber=0.8;
 488 // Support inside
 489    Float_t asupport[2] = {12.,1.};
 490    Float_t zsupport[2] = {6.,1.};
 491    Float_t wsupport[2] = {1.,1.};
 492    Float_t densupport=0.1;
 493
 494 //*** Definition Of avaible START materials ***
 495    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
 496    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 497    AliMaterial(2, "START Air$", 14.61, 7.3, .001205, 30423.,999);
 498    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999);
 499    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999);
 500
 501    AliMixture( 3, "Al2O3   $", aal2o3, zal2o3, denscer, -2, wal2o3);
 502    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 503    char namate[21]="";
 504    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 505    acer[0]=a;
 506    zcer[0]=z;
 507    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 508    acer[1]=a;
 509    zcer[1]=z;
 510
 511    AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 512    AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 513    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 514
 515    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 516    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
 517    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
 518
 519
 520    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 521    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 522    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 523    AliMedium(4, "Ceramic$", 9, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 524    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 525    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 526    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 527    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 528    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 529    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 530    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 531    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 532
 533    if(fDebug) cout<<ClassName()<<": ++++++++++++++Medium set++++++++++"<<endl;
 534
 535 }
 536 //---------------------------------------------------------------------
 537 void AliSTARTv1::DrawDetector()
 538 {
 539 //
 540 // Draw a shaded view of the Forward multiplicity detector version 0
 541 //
 542
 543   //Set ALIC mother transparent
 544   gMC->Gsatt("ALIC","SEEN",0);
 545   //
 546   //Set volumes visible
 547   //  gMC->Gsatt("0ST","SEEN",0);
 548   gMC->Gsatt("0INS","SEEN",0);
 549   gMC->Gsatt("0PMT","SEEN",1);
 550   gMC->Gsatt("0DIV","SEEN",1);
 551   //
 552   gMC->Gdopt("hide","off");
 553   gMC->Gdopt("shad","on");
 554   gMC->SetClipBox(".");
 555   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 556   gMC->DefaultRange();
 557   gMC->Gdraw("alic",90,0,0,-35,9.5,.6,0.6);
 558   gMC->Gdhead(1111,"T-Zero detector");
 559   gMC->Gdopt("hide","off");
 560 }
 561
 562 //-------------------------------------------------------------------
 563 void AliSTARTv1::Init()
 564 {
 565 // Initialises version 0 of the Forward Multiplicity Detector
 566 //
 567 //Int_t *idtmed  = gAlice->Idtmed();
 568   AliSTART::Init();
 569   fIdSens1=gMC->VolId("0TOP");
 570   if(fDebug) printf("%s: *** START version 0 initialized ***\n",ClassName());
 571
 572 }
 573
 574 //-------------------------------------------------------------------
 575
 576 void AliSTARTv1::StepManager()
 577 {
 578   //
 579   // Called for every step in the START Detector
 580   //
 581   Int_t id,copy,copy1;
 582   static Float_t hits[7];
 583   static Float_t edep;
 584   static Int_t vol[2];
 585   TLorentzVector pos;
 586
 587   TClonesArray &lhits = *fHits;
 588
 589   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 590   //  Float_t charge = gMC->TrackCharge();
 591   //  if(TMath::Abs(charge)<=0.) return; //take only charged particles
 592   id=gMC->CurrentVolID(copy);
 593
 594
 595    // Check the sensetive volume
 596   if(id==fIdSens1 ) {
 597     if(gMC->IsTrackEntering()) {
 598       gMC->CurrentVolOffID(2,copy);
 599       vol[1]=copy;
 600       gMC->CurrentVolOffID(3,copy1);
 601       vol[0]=copy1;
 602
 603       gMC->TrackPosition(pos);
 604       hits[0] = pos[0];
 605       hits[1] = pos[1];
 606       hits[2] = pos[2];
 607       if(pos[2]<0) vol[0]=2;
 608       if(pos[2]>=0) vol[0]=1;
 609
 610       Float_t etot=gMC->Etot();
 611       hits[4]=etot;
 612       Int_t iPart= gMC->TrackPid();
 613       Int_t partID=gMC->IdFromPDG(iPart);
 614       hits[5]=partID;
 615       Float_t ttime=gMC->TrackTime();
 616       hits[6]=ttime*1e9;
 617       edep=0;
 618     }
 619     if(gMC->IsTrackInside())    {
 620       Float_t de=gMC->Edep();
 621       edep=edep+de;
 622     }
 623
 624     if(gMC->IsTrackExiting())   {
 625       Float_t de=gMC->Edep();
 626       edep=edep+de;
 627       hits[3]=edep*1e3;
 628       new(lhits[fNhits++]) AliSTARThit(fIshunt,gAlice->GetMCApp()->GetCurrentTrackNumber(),vol,hits);
 629     }
 630   }
 631 //---------------------------------------------------------------------
 632 }
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