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 //  setBufferSize(128000);
  59 }
  60 //-------------------------------------------------------------------------
  61 void AliSTARTv1::CreateGeometry()
  62 {
  63   //
  64   // Create the geometry of START Detector version 0
  65   //
  66   // begin Html
  67   /*
  68    <img src="gif/AliSTARTv0.gif">
  69   */
  70   //
  71
  72
  73   Int_t *idtmed = fIdtmed->GetArray();
  74
  75   Int_t is;
  76   Int_t idrotm[999];
  77   Float_t x,y,z;
  78
  79   Float_t pstartR[18]={0., 360., 5.,
  80                        -76.5+0.00+69.7, 4.25, 10.,
  81                        -76.5+6.05+69.7, 4.5, 10.,
  82                        -76.5+8.05+69.7, 4.5, 10.,
  83                        -76.5+8.05+69.7, 5.1, 10.,
  84                        -62.9+0.00+69.7, 5.1, 10.};
  85
  86   Float_t pstart[3]={4.3, 12.,6.8};
  87   Float_t pinstart[3]={0.,1.6,6.5};
  88   Float_t ppmt[3]={0.,1.5,3.5};
  89
  90   Float_t preg[3]={0., 1.0, 0.005}; //photcathode dobavil bogdanov
  91
  92   Float_t pdivider[3]={0.,1.2,1.75};
  93   Float_t pdiv2[3]={0.,1.2,1.25};
  94   Float_t pdiv1[3]={0.6,1.2,0.5};
  95   //  Float_t ptop[3]={0.,1.0,1.5};
  96   Float_t ptop[3]={0., 1.0, 1.5};
  97   Float_t pbot[3]={0.6,1.2,0.1};
  98   Float_t pglass[3]={1.2,1.3,2.};
  99   Float_t pcer[3]={0.9,1.1,0.09};
 100   Float_t psteel[3]={0.9,1.1,0.01};
 101   Float_t ppins[3]={0.6,1.2,0.014};
 102   Float_t phole[3]={0.6,1.2,0.015};
 103   Float_t pknob[3]={0.5,0.6,0.4};
 104   Float_t pknob_vac[3]={0.,0.5,0.4};
 105   Float_t pknob_bot[3]={0.,0.6,0.05};
 106   Float_t pribber[3] = {0.,1.2,2.413/2.};
 107   Float_t presist[3] = {0.,1.2,0.087/2.};
 108   Float_t psupport1[3] = {4.51,4.6,4.0};//C kozhuh vnutri
 109   Float_t psupport2[3] = {9.4,9.5,4.0};// snaruzhi  C
 110   Float_t psupport3[3] = {4.51,9.5,0.05};//kryshki  C
 111   Float_t psupport5[3] = {1.44,1.5,6.5}; // stakanchik dlai feu  C
 112   Float_t psupport6[3] = {0,1.5,0.05}; //kryshechka stakanchika  Al
 113   Float_t psupport7[3] = {1.5,1.6,0.6}; //kolechko snaruzhu stakanchika Al
 114   // Mother Volume katushka dlia krepezha vokrug truby k Absorbru
 115     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
 116   Float_t ppcon[70];
 117     ppcon[0]  =   0;
 118     ppcon[1]  = 360;
 119     ppcon[2]  =  13;
 120 //  1:
 121     ppcon[3]  =  14.1/2;
 122     ppcon[4]  =   4.4;
 123     ppcon[5]  =   4.5;
 124 //  2
 125     ppcon[6]  = ppcon[3]+1.;
 126     ppcon[7]  =   4.4;
 127     ppcon[8]  =   4.5;
 128 //  3
 129     ppcon[9]  = ppcon[6];
 130     ppcon[10] =   4.4;
 131     ppcon[11] =   5.1;
 132
 133 //  4
 134
 135     ppcon[12]  = ppcon[9]+0.1;
 136     ppcon[13] =   4.4;
 137     ppcon[14] =   5.1;
 138 //  5
 139
 140     ppcon[15]  = ppcon[12];
 141     ppcon[16] =   4.9;
 142     ppcon[17] =   5.1;
 143
 144 //  6
 145     ppcon[18]  = ppcon[15]+7.05;
 146     ppcon[19] =   4.9;
 147     ppcon[20] =   5.1;
 148
 149 //  7
 150     ppcon[21]  = ppcon[18];
 151     ppcon[22] =   4.9;
 152     ppcon[23] =   5.1;
 153
 154 /// 8
 155     ppcon[24]  = ppcon[21]+0.01;
 156     ppcon[25] =   3.15;
 157     ppcon[26] =   3.25;
 158
 159 /// 9
 160     ppcon[27]  = ppcon[24];
 161     ppcon[28] =   3.15;
 162     ppcon[29] =   3.25;
 163
 164 //  10
 165     ppcon[30]  = ppcon[27]+4.5;
 166     ppcon[31] =   3.15;
 167     ppcon[32] =   3.25;
 168
 169 //  11
 170     ppcon[33] = ppcon[30];
 171     ppcon[34] =   3.15;
 172     ppcon[35] =   3.25;
 173
 174 //  12
 175     ppcon[36]  = ppcon[33];
 176     ppcon[37] =   3.15;
 177     ppcon[38] =   7.6;
 178
 179 //  13
 180     ppcon[39]  = ppcon[33]+0.4;
 181     ppcon[40] =   3.15;
 182     ppcon[41] =   7.6;
 183
 184 //  14
 185 //    ppcon[39]  = ppcon[36];
 186 //    ppcon[40] =   3.15;
 187 //    ppcon[41] =   7.6;
 188
 189     gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,42);
 190     z=-69.7;//-14.1/2;
 191     gMC->Gspos("0SUP",1,"ALIC",0.,0.,z,idrotm[901],"ONLY");
 192
 193
 194    Float_t zdetRight=69.7,zdetLeft=350;
 195  //-------------------------------------------------------------------
 196  //  START volume
 197  //-------------------------------------------------------------------
 198
 199
 200     gMC->Gsvolu("0STR","PCON",idtmed[kAir],pstartR,18);
 201     gMC->Gsvolu("0STL","TUBE",idtmed[kAir],pstart,3);
 202     gMC->Gspos("0STR",1,"ALIC",0.,0.,-zdetRight-pstart[2],idrotm[901],"ONLY");
 203     gMC->Gspos("0STL",1,"ALIC",0.,0.,zdetLeft+pstart[2],0,"ONLY");
 204
 205 //START interior
 206     gMC->Gsvolu("0INS","TUBE",idtmed[kAir],pinstart,3);
 207     gMC->Gsvolu("0PMT","TUBE",idtmed[kOpAir],ppmt,3);
 208     gMC->Gsvolu("0DIV","TUBE",idtmed[kVac],pdivider,3);
 209     gMC->Gsvolu("0SU1","TUBE",idtmed[kC],psupport1,3);//C kozhuh vnutri
 210     gMC->Gsvolu("0SU2","TUBE",idtmed[kC],psupport2,3);// snaruzhi  C
 211     gMC->Gsvolu("0SU3","TUBE",idtmed[kC],psupport3,3);//kryshka perednaiai  C
 212     gMC->Gsvolu("0SU4","TUBE",idtmed[kC],psupport3,3);//kryshka zadnaiai  C
 213     //    gMC->Gsvolu("0SU5","TUBE",idtmed[kAir],psupport4,3);// dyrki dlia feu v zadnej kryshke Air
 214     gMC->Gsvolu("0SU6","TUBE",idtmed[kC],psupport5,3);// stakanchik dlai feu  C
 215     gMC->Gsvolu("0SU7","TUBE",idtmed[kAl],psupport6,3);//kryshechka stakanchika  Al
 216     gMC->Gsvolu("0SU8","TUBE",idtmed[kAl],psupport7,3);//kolechko snaruzhu stakanchika Al
 217
 218 // first ring: 12 units of Scintillator+PMT+divider
 219   Float_t  theta  = (180 / TMath::Pi()) * TMath::ATan(6.5 / zdetRight);
 220   printf(" theta %f", theta);
 221   Float_t angle  = 2 * TMath::Pi() / 12;
 222   Float_t phi[3];
 223
 224    for (is=0; is<12; is++)
 225       {
 226
 227         x = 6.5 * TMath::Sin(is * angle);
 228         y = 6.5 * TMath::Cos(is * angle);
 229
 230         phi[0] = -30 * is;
 231         phi[1] = 90 - is * 30;
 232         phi[2] = 90 - is * 30;
 233         for (Int_t j = 0; j < 3; j++)
 234           if (phi[j] < 0)  phi[j] += 360;
 235
 236         AliMatrix (idrotm[902 + is], 90.,         phi[0],
 237                    90. + theta, phi[1],
 238                    theta,       phi[2]);
 239         z=-pstart[2]+pinstart[2]+0.2;
 240         gMC->Gspos ("0INS", is + 1, "0STR", x, y, z, idrotm[902 + is], "ONLY");
 241         gMC->Gspos ("0INS", is + 13, "0STL", x, y, z, 0, "ONLY");
 242
 243         x = 9. * TMath::Sin(angle/2+is * angle);
 244         y = 9. * TMath::Cos(angle/2+is * angle);
 245
 246         gMC->Gspos ("0INS", is + 25, "0STL", x, y, z, 0, "ONLY");
 247
 248       }
 249
 250
 251    x=0;
 252    y=0;
 253    z=-pinstart[2]+ppmt[2]+2.*psupport6[2]+0.1;
 254    gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
 255    z=z+pdivider[2]+ppmt[2];
 256    gMC->Gspos("0DIV",1,"0INS",x,y,z,0,"ONLY");
 257
 258    // PMT
 259
 260    // Entry window (glass)
 261    gMC->Gsvolu("0TOP","TUBE",idtmed[kOpGlass],ptop,3); //glass
 262    //   gMC->Gsvolu("0TOP","TUBE",idtmed[12],ptop,3); //lucite
 263    z=-ppmt[2]+ptop[2];
 264    gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
 265
 266    //Fotokatod
 267
 268    gMC->Gsvolu ("0REG", "TUBE", idtmed[kOpGlass], preg, 3); //photocathode dobavil bogdanov(AliSTARTv2)
 269    z = -ppmt[2] + 2 * ptop[2] + preg[2]; //photocathode dobavil bogdanov
 270    gMC->Gspos ("0REG", 1, "0PMT", 0, 0, z, 0, "ONLY"); //photocathode dobavil bogdanov(AliSTARTv2)
 271
 272    // Bottom glass
 273    gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
 274    z=ppmt[2]-pbot[2];
 275    if(fDebug) printf("%s: Z bottom %f\n",ClassName(),z);
 276    gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
 277    // Side cylinder glass
 278    gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
 279    z=ppmt[2]-pglass[2];
 280    gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
 281    //PMT electrodes support structure
 282    gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
 283    gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
 284    z=-ppmt[2]+2*ptop[2]+0.3;;
 285    for (is=1; is<=15; is++)
 286      {
 287        z=z+psteel[2]+pcer[2];
 288        gMC->Gspos("0CER",is,"0PMT",0,0,z,0,"ONLY");
 289        z=z+psteel[2]+pcer[2];
 290        gMC->Gspos("0STE",is,"0PMT",0,0,z,0,"ONLY");
 291      }
 292
 293    // Divider
 294    // Knob at the bottom of PMT baloon
 295
 296    gMC->Gsvolu("0NB","TUBE",idtmed[6],pknob,3);
 297    z=-pdivider[2]+pknob[2];
 298    gMC->Gspos("0NB",1,"0DIV",0,0,z,0,"ONLY");
 299    gMC->Gsvolu("0KB","TUBE",idtmed[kGlass],pknob_bot,3);
 300    z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
 301    gMC->Gspos("0KB",1,"0DIV ",0,0,z,0,"ONLY");
 302    gMC->Gsvolu("0VAC","TUBE",idtmed[kVac],pknob_vac,3);
 303    z=-pdivider[2]+pknob_vac[2];
 304    gMC->Gspos("0VAC",1,"0DIV",0,0,z,0,"ONLY");
 305    //Steel pins + pin holes
 306    gMC->Gsvolu("0PIN","TUBE",idtmed[kSteel],ppins,3);
 307    z=-pdivider[2]+ppins[2];
 308    gMC->Gspos("0PIN",1,"0DIV",0,0,z,0,"ONLY");
 309    gMC->Gsvolu("0HOL","TUBE",idtmed[kBrass],phole,3);
 310    z=-pdivider[2]+2*ppins[2]+phole[2];
 311    gMC->Gspos("0HOL",1,"0DIV",0,0,z,0,"ONLY");
 312
 313    //Socket
 314    gMC->Gsvolu("0V1","TUBE",idtmed[kCer],pdiv1,3);
 315    z=-pdivider[2]+pdiv1[2];
 316    gMC->Gspos("0V1",1,"0DIV",0,0,z,0,"ONLY");
 317    //Resistors
 318    gMC->Gsvolu("0V2","TUBE",idtmed[kAir],pdiv2,3);
 319    z=pdivider[2]-pdiv2[2];
 320    gMC->Gspos("0V2",1,"0DIV",0,0,z,0,"ONLY");
 321    gMC->Gsvolu("0RS","TUBE",idtmed[kCer],presist,3);
 322    z=-pdiv2[2]+presist[2];
 323    gMC->Gspos("0RS",1,"0V2",0,0,z,0,"ONLY");
 324    gMC->Gsvolu("0RB","TUBE",idtmed[kRibber],pribber,3);
 325    z=pdiv2[2]-pribber[2];
 326    gMC->Gspos("0RB",1,"0V2",0,0,z,0,"ONLY");
 327
 328
 329    //Support  left side
 330    /*
 331    z=-pstart[2]+psupport1[2];
 332    gMC->Gspos("0SU1",2,"0STL",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
 333    gMC->Gspos("0SU2",2,"0STL",0,0,z,0,"ONLY"); //C kozhuh vnutri
 334    z=-pstart[2]+psupport3[2];
 335    gMC->Gspos("0SU3",2,"0STL",0,0,z,0,"ONLY"); //peredniaia kryshka
 336    z=-pstart[2]+2.*psupport1[2];
 337    gMC->Gspos("0SU4",2,"0STL",0,0,z,0,"MANY"); //zadnaiai kryshka
 338    */
 339    z=-pstart[2]+psupport1[2]+0.1;
 340    gMC->Gspos("0SU1",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
 341    gMC->Gspos("0SU2",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh vnutri
 342    z=-pstart[2]+psupport3[2]+0.1;
 343    gMC->Gspos("0SU3",1,"0STR",0,0,z,0,"ONLY"); //peredniaia kryshka
 344    z=-pstart[2]+2.*psupport1[2]+0.1;
 345    gMC->Gspos("0SU4",1,"0STR",0,0,z,0,"MANY"); //zadnaiai kryshka
 346    gMC->Gspos("0SU6",1,"0INS",0,0,0,0,"ONLY");//C stakanchik dlia feu
 347    z=-pinstart[2]+psupport6[2];
 348    gMC->Gspos("0SU7",1,"0INS",0,0,z,0,"ONLY"); //Al kryshechka
 349
 350    z=pinstart[2]-psupport7[2];
 351    gMC->Gspos("0SU8",1,"0INS",0,0,z,0,"ONLY"); //Al kolechko
 352
 353
 354    Float_t par[3];
 355    par[0]=4.4;
 356    par[1]=4.5;
 357    par[2]=0.5;
 358    gMC->Gsvolu("0SC0","TUBE",idtmed[kC],par,3);
 359    z=ppcon[3]+par[2];
 360    gMC->Gspos("0SC0",1,"0SUP",0,0,z,0,"ONLY");
 361    z += par[2];
 362    par[0]=4.4;
 363    par[1]=5.1;
 364    par[2]=0.05;
 365    gMC->Gsvolu("0SC1","TUBE",idtmed[kC],par,3);
 366    z += par[2];
 367    gMC->Gspos("0SC1",1,"0SUP",0,0,z,0,"ONLY");
 368    z=z+par[2];
 369    par[0]=4.9;
 370    par[1]=5.0;
 371    par[2]=6.9/2;
 372     gMC->Gsvolu("0SC2","TUBE",idtmed[kC],par,3);
 373     z += par[2];
 374     gMC->Gspos("0SC2",1,"0SUP",0,0,z,0,"ONLY");
 375     z += par[2];
 376     /*
 377     Float_t parC[5];
 378     parC[0]=0.25;
 379     parC[1]=5.1;
 380     parC[2]=5.2;
 381     parC[3]=5.5;
 382     parC[4]=5.6;
 383     gMC->Gsvolu("0SC3","CONE",idtmed[kC],parC,5);
 384     z += parC[0];
 385     gMC->Gspos("0SC3",1,"0SUP",0,0,z,0,"ONLY");
 386     z += parC[0];
 387     par[0]=5.5;
 388     par[1]=5.6;
 389     par[2]=1.2/2;
 390     gMC->Gsvolu("0SC4","TUBE",idtmed[kC],par,3);
 391     z += par[2];
 392     gMC->Gspos("0SC4",1,"0SUP",0,0,z,0,"ONLY");
 393     par[0]=5.1;
 394     par[1]=5.5;
 395     par[2]=1.2/2;
 396     gMC->Gsvolu("0SA0","TUBE",idtmed[kAl],par,3);
 397     gMC->Gspos("0SA0",1,"0SUP",0,0,z,0,"ONLY");
 398     //gvozdi dlia skruchivaniia Al i C parts
 399     par[0]=5.75;
 400     par[1]=5.78;
 401     gMC->Gsvolu("0SN1","TUBE",idtmed[kSteel],par,3);
 402     gMC->Gspos("0SN1",1,"0SUP",0,0,z,0,"ONLY");
 403     z += par[2];
 404     */
 405     par[0]=3.15;
 406     par[1]=4.9;
 407     par[2]=0.1/2;
 408     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
 409
 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]=4.5/2;
 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]=0.2;
 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    Int_t *idtmed = fIdtmed->GetArray();
 442
 443 // AIR
 444
 445    Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
 446    Float_t zAir[4]={6.,7.,8.,18.};
 447    Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 448    Float_t dAir = 1.20479E-3;
 449
 450 // Scintillator CH
 451    Float_t ascin[2]={1.01,12.01};
 452    Float_t zscin[2]={1,6};
 453    Float_t wscin[2]={1,1};
 454    Float_t denscin=1.03;
 455 //Lucite C(CH3)CO2CH3
 456    Float_t alucite[3]={1.01,12.01,15.999};
 457    Float_t zlucite[3]={1,6,8};
 458    Float_t wlucite[3]={8,5,2};
 459    Float_t denlucite=1.16;
 460  // PMT glass SiO2
 461    Float_t aglass[2]={28.0855,15.9994};
 462    Float_t zglass[2]={14.,8.};
 463    Float_t wglass[2]={1.,2.};
 464    Float_t dglass=2.65;
 465 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 466    Float_t acer[2],zcer[2],wcer[2]={0.972,0.028};
 467    Float_t aCeramic[2]  = { 26.981539,15.9994 };
 468    Float_t zCeramic[2]  = { 13.,8. };
 469    Float_t wCeramic[2]  = { 2.,3. };
 470    Float_t denscer  = 3.6;
 471
 472 // Brass 80% Cu, 20% Zn
 473    Float_t abrass[2] = {63.546,65.39};
 474    Float_t zbrass[2] = {29,30};
 475    Float_t wbrass[2] = {0.8,0.2};
 476    Float_t denbrass=8.96;
 477
 478 //Ribber C6H12S
 479    Float_t aribber[3] = {12.,1.,32.};
 480    Float_t zribber[3] = {6.,1.,16.};
 481    Float_t wribber[3] = {6.,12.,1.};
 482    Float_t denribber=0.8;
 483 // Support inside
 484    Float_t asupport[2] = {12.,1.};
 485    Float_t zsupport[2] = {6.,1.};
 486    Float_t wsupport[2] = {1.,1.};
 487    Float_t densupport=0.1;
 488
 489 //*** Definition Of avaible START materials ***
 490    AliMaterial(0, "START Steel$", 55.850,26.,7.87,1.76,999);
 491    AliMaterial(1, "START Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 492    AliMixture(2, "START Air$", aAir, zAir, dAir,4,wAir);
 493    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999);
 494    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999);
 495
 496    AliMixture( 3, "Ceramic  $",aCeramic, zCeramic, denscer, -2, wCeramic);
 497    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 498    char namate[21]="";
 499    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 500    acer[0]=a;
 501    zcer[0]=z;
 502    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 503    acer[1]=a;
 504    zcer[1]=z;
 505
 506
 507    AliMixture( 9, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 508    AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 509    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 510    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 511    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
 512    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
 513
 514    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 515    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 516    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 517    AliMedium(4, "Ceramic$", 9, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 518    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 519    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 520    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 521    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 522    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 523    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 524    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 525    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 526    AliMedium(16, "OpticalGlass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 527    AliMedium(17, "START OpAir$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 528
 529
 530 // Definition Cherenkov parameters
 531    int i;
 532    //   const Int_t kNbins=30;
 533    const Int_t kNbins=27;
 534
 535    //  Float_t aPckov[kNbins];
 536    Float_t aRindexSiO2[kNbins], rindexAir[kNbins], efficAll[kNbins], absorAir[kNbins];
 537
 538    // quartz 20mm
 539    Float_t aAbsSiO2[kNbins]={28.3, 27.7, 27.3, 26.7, 26.4,
 540                              25.9, 25.3, 24.9, 24.5, 23.7, 23.2,
 541                              22.8, 22.4, 21.8, 21.3, 22.8,
 542                              22.1, 21.7, 21.2, 20.5, 19.9,
 543                              19.3, 18.7, 18.0, 17.1, 16.3, 15.3   };
 544
 545    Float_t aPckov[kNbins]  ={4.02, 4.11, 4.19, 4.29, 4.38,
 546                              4.48, 4.58, 4.69, 4.81, 4.93,
 547                              5.05, 5.19, 5.33, 5.48, 5.63,
 548                              5.8,  5.97, 6.16, 6.36, 6.57,
 549                              6.8,  7.04, 7.3,  7.58, 7.89, 8.22, 8.57};
 550
 551    //   Float_t aAbsSiO2[kNbins];
 552   for(i=0;i<kNbins;i++)
 553     {
 554       //      aPckov[i]=(0.1*i+5.5)*1e-9;//Photons energy bins 5.5 eV - 8.5 eV step 0.1 eV
 555       aPckov[i]=aPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV
 556       aRindexSiO2[i]=1.458; //refractive index for qwarts
 557       rindexAir[i]=1.;
 558       efficAll[i]=1.;
 559       //  aAbsSiO2[i]=28.5; //quartz 30mm
 560       absorAir[i]=1.e-5;
 561     }
 562
 563    gMC->SetCerenkov (idtmed[kOpGlass], kNbins, aPckov, aAbsSiO2, efficAll, aRindexSiO2 );
 564    gMC->SetCerenkov (idtmed[kOpAir], kNbins , aPckov, absorAir, efficAll, rindexAir);
 565    if(fDebug) cout<<ClassName()<<": ++++++++++++++Medium set++++++++++"<<endl;
 566
 567 }
 568 //---------------------------------------------------------------------
 569 void AliSTARTv1::DrawDetector()
 570 {
 571 //
 572 // Draw a shaded view of the Forward multiplicity detector version 0
 573 //
 574
 575   //Set ALIC mother transparent
 576   gMC->Gsatt("ALIC","SEEN",0);
 577   //
 578   //Set volumes visible
 579   //  gMC->Gsatt("0STR","SEEN",0);
 580   //  gMC->Gsatt("0INS","SEEN",0);
 581   // gMC->Gsatt("0PMT","SEEN",1);
 582   // gMC->Gsatt("0DIV","SEEN",1);
 583   //
 584   gMC->Gdopt("hide","off");
 585   gMC->Gdopt("shad","on");
 586   gMC->SetClipBox(".");
 587   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 588   gMC->DefaultRange();
 589   gMC->Gdraw("alic",90,0,0,-35,9.5,.6,0.6);
 590   //gMC->Gdraw("alic",0,0,0,10,9.5,.8,0.8); //other side view
 591   gMC->Gdhead(1111,"T-Zero detector");
 592   gMC->Gdopt("hide","off");
 593 }
 594
 595 //-------------------------------------------------------------------
 596 void AliSTARTv1::Init()
 597 {
 598 // Initialises version 0 of the Forward Multiplicity Detector
 599 //
 600 //Int_t *idtmed  = gAlice->Idtmed();
 601   AliSTART::Init();
 602   fIdSens1=gMC->VolId("0REG");
 603
 604    AliDebug(1,Form("%s: *** START version 1 initialized ***\n",ClassName()));
 605
 606 }
 607
 608 //-------------------------------------------------------------------
 609
 610 void AliSTARTv1::StepManager()
 611 {
 612   //
 613   // Called for every step in the START Detector
 614   //
 615   Int_t id,copy,copy1;
 616   static Float_t hits[6];
 617   static Int_t vol[2];
 618   TLorentzVector pos;
 619
 620   TClonesArray &lhits = *fHits;
 621
 622   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 623
 624 // If particles is photon then ...
 625
 626   if (gMC->TrackPid() == 50000050)
 627     {
 628       id=gMC->CurrentVolID(copy);
 629
 630
 631       // Check the sensetive volume
 632       if(id==fIdSens1 ) {
 633         if(gMC->IsTrackEntering()) {
 634           gMC->CurrentVolOffID(2,copy);
 635           vol[1]=copy;
 636           gMC->CurrentVolOffID(3,copy1);
 637           vol[0]=copy1;
 638           gMC->TrackPosition(pos);
 639           hits[0] = pos[0];
 640           hits[1] = pos[1];
 641           hits[2] = pos[2];
 642           //      printf(" pmt %i ", vol[1]);
 643           //  printf(" x %f y %f z %f \n", pos[0],pos[1],pos[2]);
 644           if(pos[2]<0) vol[0]=2;
 645           if(pos[2]>=0) vol[0]=1;
 646
 647           Float_t etot=gMC->Etot();
 648           hits[3]=etot;
 649           Int_t iPart= gMC->TrackPid();
 650           Int_t partID=gMC->IdFromPDG(iPart);
 651           hits[4]=partID;
 652           //    if (partID!=50) cout<<partID<<endl;
 653           Float_t ttime=gMC->TrackTime();
 654           hits[5]=ttime*1e9;
 655         }
 656
 657         if(gMC->IsTrackExiting())
 658           new(lhits[fNhits++]) AliSTARThit(fIshunt,gAlice->GetMCApp()->GetCurrentTrackNumber(),vol,hits);
 659
 660       }
 661     }
 662 //---------------------------------------------------------------------
 663 }
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