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 /* $Id$ */
  17
  18 /////////////////////////////////////////////////////////////////////
  19 //                                                                 //
  20 // START ( T-zero) detector  version 1                             //
  21 //
  22 //Begin Html
  23 /*
  24 <img src="gif/AliSTARTv1Class.gif">
  25 */
  26 //End Html
  27 //                                                                  //
  28 //                                                                  //
  29 //////////////////////////////////////////////////////////////////////
  30
  31 #include <Riostream.h>
  32 #include <stdlib.h>
  33
  34 #include <TGeometry.h>
  35 #include <TLorentzVector.h>
  36 #include <TMath.h>
  37 #include <TNode.h>
  38 #include <TTUBE.h>
  39 #include <TVirtualMC.h>
  40
  41 #include "AliLog.h"
  42 #include "AliMagF.h"
  43 #include "AliRun.h"
  44 #include "AliSTARThit.h"
  45 #include "AliSTARTv1.h"
  46 #include "AliMC.h"
  47
  48 ClassImp(AliSTARTv1)
  49
  50 //--------------------------------------------------------------------
  51 AliSTARTv1::AliSTARTv1(const char *name, const char *title):
  52  AliSTART(name,title)
  53 {
  54   //
  55   // Standart constructor for START Detector version 0
  56   //
  57   fIdSens1=0;
  58   fIshunt = 2;
  59 }
  60 //_____________________________________________________________________________
  61
  62 AliSTARTv1::~AliSTARTv1()
  63 {
  64   // desctructor
  65 }
  66
  67 //-------------------------------------------------------------------------
  68 void AliSTARTv1::CreateGeometry()
  69 {
  70   //
  71   // Create the geometry of START Detector version 0
  72   //
  73   // begin Html
  74   /*
  75    <img src="gif/AliSTARTv0.gif">
  76   */
  77   //
  78
  79
  80
  81   Int_t *idtmed = fIdtmed->GetArray();
  82
  83   Int_t is;
  84   Int_t idrotm[999];
  85   Float_t x,y,z;
  86
  87   Float_t pstartR[18]={0., 360., 5.,
  88                        -76.5+0.00+69.7, 4.25, 10.,
  89                        -76.5+6.05+69.7, 4.5, 10.,
  90                        -76.5+8.05+69.7, 4.5, 10.,
  91                        -76.5+8.05+69.7, 5.1, 10.,
  92                        -62.9+0.00+69.7, 5.1, 10.};
  93
  94   Float_t pstart[3]={4.3, 12.,6.8};
  95   Float_t pinstart[3]={0.,1.6,6.5};
  96   Float_t ppmt[3]={0.,1.5,3.5};
  97   Float_t ptop[3]={0.,1.,1.5};
  98   Float_t preg[3]={0., 1.0, 0.005}; //photcathode dobavil bogdanov
  99   Float_t ptopout[3]={1.,1.01,1.5};
 100   //  Float_t pregafter[3]={0.,1.0,0.005};
 101   Float_t pdivider[3]={0.,1.2,1.75};
 102   Float_t pdiv2[3]={0.,1.2,1.25};
 103   Float_t pdiv1[3]={0.6,1.2,0.5};
 104   Float_t pbot[3]={0.6,1.2,0.1};
 105   Float_t pglass[3]={1.2,1.3,2.};
 106   Float_t pcer[3]={0.9,1.1,0.09};
 107   Float_t psteel[3]={0.9,1.1,0.01};
 108   Float_t ppins[3]={0.6,1.2,0.014};
 109   Float_t phole[3]={0.6,1.2,0.015};
 110   Float_t pknob[3]={0.5,0.6,0.4};
 111   Float_t pknob_vac[3]={0.,0.5,0.4};
 112   Float_t pknob_bot[3]={0.,0.6,0.05};
 113   Float_t pribber[3] = {0.,1.2,2.413/2.};
 114   Float_t presist[3] = {0.,1.2,0.087/2.};
 115   Float_t psupport1[3] = {4.51,4.6,4.0};//C kozhuh vnutri
 116   Float_t psupport2[3] = {9.4,9.5,4.0};// snaruzhi  C
 117   Float_t psupport3[3] = {4.51,9.5,0.05};//kryshki  C
 118   Float_t psupport5[3] = {1.44,1.5,6.5}; // stakanchik dlai feu  C
 119   Float_t psupport6[3] = {0,1.5,0.05}; //kryshechka stakanchika  Al
 120   Float_t psupport7[3] = {1.5,1.6,0.6}; //kolechko snaruzhu stakanchika Al
 121
 122   // Mother Volume katushka dlia krepezha vokrug truby k Absorbru
 123     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
 124   Float_t ppcon[70];
 125     ppcon[0]  =   0;
 126     ppcon[1]  = 360;
 127     ppcon[2]  =  13;
 128 //  1:
 129     ppcon[3]  =  14.1/2;
 130     ppcon[4]  =   4.4;
 131     ppcon[5]  =   4.5;
 132 //  2
 133     ppcon[6]  = ppcon[3]+1.;
 134     ppcon[7]  =   4.4;
 135     ppcon[8]  =   4.5;
 136 //  3
 137     ppcon[9]  = ppcon[6];
 138     ppcon[10] =   4.4;
 139     ppcon[11] =   5.1;
 140
 141 //  4
 142
 143     ppcon[12]  = ppcon[9]+0.1;
 144     ppcon[13] =   4.4;
 145     ppcon[14] =   5.1;
 146 //  5
 147
 148     ppcon[15]  = ppcon[12];
 149     ppcon[16] =   4.9;
 150     ppcon[17] =   5.1;
 151
 152 //  6
 153     ppcon[18]  = ppcon[15]+7.05;
 154     ppcon[19] =   4.9;
 155     ppcon[20] =   5.1;
 156
 157 //  7
 158     ppcon[21]  = ppcon[18];
 159     ppcon[22] =   4.9;
 160     ppcon[23] =   5.1;
 161
 162 /// 8
 163     ppcon[24]  = ppcon[21]+0.01;
 164     ppcon[25] =   3.15;
 165     ppcon[26] =   3.25;
 166
 167 /// 9
 168     ppcon[27]  = ppcon[24];
 169     ppcon[28] =   3.15;
 170     ppcon[29] =   3.25;
 171
 172 //  10
 173     ppcon[30]  = ppcon[27]+4.5;
 174     ppcon[31] =   3.15;
 175     ppcon[32] =   3.25;
 176
 177 //  11
 178     ppcon[33] = ppcon[30];
 179     ppcon[34] =   3.15;
 180     ppcon[35] =   3.25;
 181
 182 //  12
 183     ppcon[36]  = ppcon[33];
 184     ppcon[37] =   3.15;
 185     ppcon[38] =   7.6;
 186
 187 //  13
 188     ppcon[39]  = ppcon[33]+0.4;
 189     ppcon[40] =   3.15;
 190     ppcon[41] =   7.6;
 191
 192 //  14
 193 //    ppcon[39]  = ppcon[36];
 194 //    ppcon[40] =   3.15;
 195 //    ppcon[41] =   7.6;
 196
 197     gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,42);
 198     z=-69.7;//-14.1/2;
 199     gMC->Gspos("0SUP",1,"ALIC",0.,0.,z,idrotm[901],"ONLY");
 200
 201
 202    Float_t zdetRight=69.7,zdetLeft=350;
 203  //-------------------------------------------------------------------
 204  //  START volume
 205  //-------------------------------------------------------------------
 206
 207
 208     gMC->Gsvolu("0STR","PCON",idtmed[kAir],pstartR,18);
 209     gMC->Gsvolu("0STL","TUBE",idtmed[kAir],pstart,3);
 210     gMC->Gspos("0STR",1,"ALIC",0.,0.,-zdetRight-pstart[2],idrotm[901],"ONLY");
 211     gMC->Gspos("0STL",1,"ALIC",0.,0.,zdetLeft+pstart[2],0,"ONLY");
 212
 213 //START interior
 214    gMC->Gsvolu("0INS","TUBE",idtmed[kAir],pinstart,3);
 215    gMC->Gsvolu("0PMT","TUBE",idtmed[kAir],ppmt,3);
 216
 217     gMC->Gsvolu("0DIV","TUBE",idtmed[kVac],pdivider,3);
 218     gMC->Gsvolu("0SU1","TUBE",idtmed[kC],psupport1,3);//C kozhuh vnutri
 219     gMC->Gsvolu("0SU2","TUBE",idtmed[kC],psupport2,3);// snaruzhi  C
 220     gMC->Gsvolu("0SU3","TUBE",idtmed[kC],psupport3,3);//kryshka perednaiai  C
 221     gMC->Gsvolu("0SU4","TUBE",idtmed[kC],psupport3,3);//kryshka zadnaiai  C
 222     //    gMC->Gsvolu("0SU5","TUBE",idtmed[kAir],psupport4,3);// dyrki dlia feu v zadnej kryshke Air
 223     gMC->Gsvolu("0SU6","TUBE",idtmed[kC],psupport5,3);// stakanchik dlai feu  C
 224     gMC->Gsvolu("0SU7","TUBE",idtmed[kAl],psupport6,3);//kryshechka stakanchika  Al
 225     gMC->Gsvolu("0SU8","TUBE",idtmed[kAl],psupport7,3);//kolechko snaruzhu stakanchika Al
 226
 227 // first ring: 12 units of Scintillator+PMT+divider
 228   Float_t  theta  = (180 / TMath::Pi()) * TMath::ATan(6.5 / zdetRight);
 229   AliInfo(Form("theta %f", theta));
 230   Float_t angle  = 2 * TMath::Pi() / 12;
 231   Float_t phi[3];
 232
 233    for (is=0; is<12; is++)
 234       {
 235
 236         x = 6.5 * TMath::Sin(is * angle);
 237         y = 6.5 * TMath::Cos(is * angle);
 238
 239         phi[0] = -30 * is;
 240         phi[1] = 90 - is * 30;
 241         phi[2] = 90 - is * 30;
 242         for (Int_t j = 0; j < 3; j++)
 243           if (phi[j] < 0)  phi[j] += 360;
 244
 245         AliMatrix (idrotm[902 + is], 90.,         phi[0],
 246                    90. + theta, phi[1],
 247                    theta,       phi[2]);
 248         z=-pstart[2]+pinstart[2]+0.2;
 249         gMC->Gspos ("0INS", is + 1, "0STR", x, y, z, idrotm[902 + is], "ONLY");
 250         gMC->Gspos ("0INS", is + 13, "0STL", x, y, z, 0, "ONLY");
 251         /*
 252         x = 9.1 * TMath::Sin(angle/2+is * angle);
 253         y = 9.1 * TMath::Cos(angle/2+is * angle);
 254
 255         gMC->Gspos ("0INS", is + 25, "0STL", x, y, z, 0, "ONLY");
 256         */
 257       }
 258
 259
 260    x=0;
 261    y=0;
 262    // z=-pinstart[2]+ppmt[2]+2.*psupport6[2]+0.1;
 263     z=-pinstart[2]+ppmt[2];
 264    gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
 265    //   z=z+pdivider[2]+ppmt[2];
 266    //  gMC->Gspos("0DIV",1,"0INS",x,y,z,0,"ONLY");
 267
 268    // PMT
 269
 270    // Entry window (glass)
 271    gMC->Gsvolu("0TOP","TUBE",idtmed[kOpGlass],ptop,3); //glass
 272    //   gMC->Gsvolu("0TOP","TUBE",idtmed[12],ptop,3); //lucite
 273    z=-ppmt[2]+ptop[2];
 274    gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
 275    //metal volume to simulate reclection
 276    gMC->Gsvolu("0TOO","TUBE",idtmed[kOpAir],ptopout,3); //glass
 277    //   gMC->Gsvolu("0TOP","TUBE",idtmed[12],ptop,3); //lucite
 278    gMC->Gspos("0TOO",1,"0PMT",0,0,z,0,"ONLY");
 279
 280    //Fotokatod
 281    gMC->Gsvolu ("0REG", "TUBE", idtmed[kOpGlassCathode], preg, 3);
 282    z = -ppmt[2] + 2 * ptop[2] + preg[2];
 283    gMC->Gspos ("0REG", 1, "0PMT", 0, 0, z, 0, "ONLY");
 284    //optical volume special to detect photons in cathode
 285    //   gMC->Gsvolu ("0RE1", "TUBE", idtmed[kOpAirNext], pregafter, 3);
 286    // z = -ppmt[2] + 2 * ptop[2] + 2*preg[2] + pregafter[2];
 287    // gMC->Gspos ("0RE1", 1, "0PMT", 0, 0, z, 0, "ONLY");
 288
 289    // Bottom glass
 290    gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
 291    z=ppmt[2]-pbot[2];
 292    AliDebugClass(1,Form("Z bottom %f\n",z));
 293    gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
 294    // Side cylinder glass
 295    gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
 296    z=ppmt[2]-pglass[2];
 297    gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
 298    //PMT electrodes support structure
 299    gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
 300    gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
 301    z=-ppmt[2]+2*ptop[2]+0.3;;
 302    for (is=1; is<=15; is++)
 303      {
 304        z=z+psteel[2]+pcer[2];
 305        gMC->Gspos("0CER",is,"0PMT",0,0,z,0,"ONLY");
 306        z=z+psteel[2]+pcer[2];
 307        gMC->Gspos("0STE",is,"0PMT",0,0,z,0,"ONLY");
 308      }
 309
 310    // Divider
 311    // Knob at the bottom of PMT baloon
 312
 313    gMC->Gsvolu("0NB","TUBE",idtmed[6],pknob,3);
 314    z=-pdivider[2]+pknob[2];
 315    gMC->Gspos("0NB",1,"0DIV",0,0,z,0,"ONLY");
 316    gMC->Gsvolu("0KB","TUBE",idtmed[kGlass],pknob_bot,3);
 317    z=-pdivider[2]+2*pknob[2]+pknob_bot[2];
 318    gMC->Gspos("0KB",1,"0DIV ",0,0,z,0,"ONLY");
 319    gMC->Gsvolu("0VAC","TUBE",idtmed[kVac],pknob_vac,3);
 320    z=-pdivider[2]+pknob_vac[2];
 321    gMC->Gspos("0VAC",1,"0DIV",0,0,z,0,"ONLY");
 322    //Steel pins + pin holes
 323    gMC->Gsvolu("0PIN","TUBE",idtmed[kSteel],ppins,3);
 324    z=-pdivider[2]+ppins[2];
 325    gMC->Gspos("0PIN",1,"0DIV",0,0,z,0,"ONLY");
 326    gMC->Gsvolu("0HOL","TUBE",idtmed[kBrass],phole,3);
 327    z=-pdivider[2]+2*ppins[2]+phole[2];
 328    gMC->Gspos("0HOL",1,"0DIV",0,0,z,0,"ONLY");
 329
 330    //Socket
 331    gMC->Gsvolu("0V1","TUBE",idtmed[kCer],pdiv1,3);
 332    z=-pdivider[2]+pdiv1[2];
 333    gMC->Gspos("0V1",1,"0DIV",0,0,z,0,"ONLY");
 334    //Resistors
 335    gMC->Gsvolu("0V2","TUBE",idtmed[kAir],pdiv2,3);
 336    z=pdivider[2]-pdiv2[2];
 337    gMC->Gspos("0V2",1,"0DIV",0,0,z,0,"ONLY");
 338    gMC->Gsvolu("0RS","TUBE",idtmed[kCer],presist,3);
 339    z=-pdiv2[2]+presist[2];
 340    gMC->Gspos("0RS",1,"0V2",0,0,z,0,"ONLY");
 341    gMC->Gsvolu("0RB","TUBE",idtmed[kRibber],pribber,3);
 342    z=pdiv2[2]-pribber[2];
 343    gMC->Gspos("0RB",1,"0V2",0,0,z,0,"ONLY");
 344
 345
 346    //Support  left side
 347    z=-pstart[2]+psupport1[2]+0.1;
 348    gMC->Gspos("0SU1",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
 349    gMC->Gspos("0SU2",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh vnutri
 350    z=-pstart[2]+psupport3[2]+0.1;
 351    gMC->Gspos("0SU3",1,"0STR",0,0,z,0,"ONLY"); //peredniaia kryshka
 352    z=-pstart[2]+2.*psupport1[2]+0.1;
 353    gMC->Gspos("0SU4",1,"0STR",0,0,z,0,"MANY"); //zadnaiai kryshka
 354    gMC->Gspos("0SU6",1,"0INS",0,0,0,0,"ONLY");//C stakanchik dlia feu
 355    z=-pinstart[2]+psupport6[2];
 356    gMC->Gspos("0SU7",1,"0INS",0,0,z,0,"ONLY"); //Al kryshechka
 357
 358    z=pinstart[2]-psupport7[2];
 359    gMC->Gspos("0SU8",1,"0INS",0,0,z,0,"ONLY"); //Al kolechko
 360
 361
 362    Float_t par[3];
 363    par[0]=4.4;
 364    par[1]=4.5;
 365    par[2]=0.5;
 366    gMC->Gsvolu("0SC0","TUBE",idtmed[kC],par,3);
 367    z=ppcon[3]+par[2];
 368    gMC->Gspos("0SC0",1,"0SUP",0,0,z,0,"ONLY");
 369    z += par[2];
 370    par[0]=4.4;
 371    par[1]=5.1;
 372    par[2]=0.05;
 373    gMC->Gsvolu("0SC1","TUBE",idtmed[kC],par,3);
 374    z += par[2];
 375    gMC->Gspos("0SC1",1,"0SUP",0,0,z,0,"ONLY");
 376    z=z+par[2];
 377    par[0]=4.9;
 378    par[1]=5.0;
 379    par[2]=6.9/2;
 380     gMC->Gsvolu("0SC2","TUBE",idtmed[kC],par,3);
 381     z += par[2];
 382     gMC->Gspos("0SC2",1,"0SUP",0,0,z,0,"ONLY");
 383     z += par[2];
 384
 385      par[0]=3.15;
 386     par[1]=4.9;
 387     par[2]=0.1/2;
 388     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
 389
 390     z += par[2];
 391     gMC->Gspos("0SA1",1,"0SUP",0,0,z,0,"ONLY");
 392     z=z+par[2];
 393     par[0]=3.15;
 394     par[1]=3.16;
 395     par[2]=4.5/2;
 396     gMC->Gsvolu("0SA2","TUBE",idtmed[kAl],par,3);
 397     z += par[2];
 398     gMC->Gspos("0SA2",1,"0SUP",0,0,z,0,"ONLY");
 399     z=z+par[2];
 400     par[0]=3.16; // eta chast' prikruchena k absorberu
 401     par[1]=7.5;
 402     par[2]=0.2;
 403     gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
 404     z += par[2];
 405     gMC->Gspos("0SA3",1,"0SUP",0,0,z,0,"ONLY");
 406     par[0]=3.16; // gvozdi eta chast' prikruchena k absorberu
 407     par[1]=7.5;
 408     par[2]=0.01;
 409     gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
 410     gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"ONLY");
 411
 412
 413 }
 414 //------------------------------------------------------------------------
 415 void AliSTARTv1::CreateMaterials()
 416 {
 417    Int_t isxfld   = gAlice->Field()->Integ();
 418    Float_t sxmgmx = gAlice->Field()->Max();
 419    //   Float_t a,z,d,radl,absl,buf[1];
 420    // Int_t nbuf;
 421    Int_t *idtmed = fIdtmed->GetArray();
 422
 423 // AIR
 424
 425    Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
 426    Float_t zAir[4]={6.,7.,8.,18.};
 427    Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 428    Float_t dAir = 1.20479E-3;
 429
 430 // Scintillator CH
 431    Float_t ascin[2]={1.01,12.01};
 432    Float_t zscin[2]={1,6};
 433    Float_t wscin[2]={1,1};
 434    Float_t denscin=1.03;
 435 //Lucite C(CH3)CO2CH3
 436    Float_t alucite[3]={1.01,12.01,15.999};
 437    Float_t zlucite[3]={1,6,8};
 438    Float_t wlucite[3]={8,5,2};
 439    Float_t denlucite=1.16;
 440  // PMT glass SiO2
 441    Float_t aglass[2]={28.0855,15.9994};
 442    Float_t zglass[2]={14.,8.};
 443    Float_t wglass[2]={1.,2.};
 444    Float_t dglass=2.65;
 445 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 446    // Float_t wcer[2]={0.972,0.028};
 447    Float_t aCeramic[2]  = { 26.981539,15.9994 };
 448    Float_t zCeramic[2]  = { 13.,8. };
 449    Float_t wCeramic[2]  = { 2.,3. };
 450    Float_t denscer  = 3.6;
 451
 452 // Brass 80% Cu, 20% Zn
 453    Float_t abrass[2] = {63.546,65.39};
 454    Float_t zbrass[2] = {29,30};
 455    Float_t wbrass[2] = {0.8,0.2};
 456    Float_t denbrass=8.96;
 457
 458 //Ribber C6H12S
 459    Float_t aribber[3] = {12.,1.,32.};
 460    Float_t zribber[3] = {6.,1.,16.};
 461    Float_t wribber[3] = {6.,12.,1.};
 462    Float_t denribber=0.8;
 463 // Support inside
 464    Float_t asupport[2] = {12.,1.};
 465    Float_t zsupport[2] = {6.,1.};
 466    Float_t wsupport[2] = {1.,1.};
 467    Float_t densupport=0.1;
 468
 469 //*** Definition Of avaible START materials ***
 470    AliMaterial(0, "Steel$", 55.850,26.,7.87,1.76,999);
 471    AliMaterial(1, "Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 472    AliMixture(2, "Air$", aAir, zAir, dAir,4,wAir);
 473    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999);
 474    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999);
 475
 476    AliMixture( 3, "Ceramic  $",aCeramic, zCeramic, denscer, -2, wCeramic);
 477    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 478    /*
 479   char namate[21]="";
 480
 481    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 482    acer[0]=a;
 483
 484    zcer[0]=z;
 485    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 486    acer[1]=a;
 487    zcer[1]=z;
 488    AliMixture( 11, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 489    */
 490     AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 491    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 492    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 493    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
 494    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
 495    AliMixture( 21, "PMT Optical glass   $",aglass,zglass,dglass,-2,wglass);
 496    AliMixture( 24, "PMT Optical glass cathode $",aglass,zglass,dglass,-2,wglass);
 497     AliMixture(22, "START Opt Air$", aAir, zAir, dAir,4,wAir);
 498    AliMixture(23, "START Opt Air Next$", aAir, zAir, dAir,4,wAir);
 499
 500    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 501    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 502    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 503    AliMedium(4, "Ceramic$", 3, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 504    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 505    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 506    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 507    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 508    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 509    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 510    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 511    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 512    AliMedium(16, "OpticalGlass$", 21, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 513    AliMedium(17, "START OpAir$", 22, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 514    AliMedium(18, "START OpAirNext$", 23, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 515     AliMedium(19, "OpticalGlassCathode$", 24, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 516
 517
 518 // Definition Cherenkov parameters
 519    int i;
 520    const Int_t kNbins=31;
 521
 522    Float_t rindexSiO2[kNbins],  efficAll[kNbins], rindexAir[kNbins], absorAir[kNbins],rindexCathodeNext[kNbins], absorbCathodeNext[kNbins];
 523
 524    // quartz 20mm
 525    Float_t aAbsSiO2[kNbins]={29.0, 28.6, 28.3, 27.7, 27.3, 26.7, 26.4,
 526                              25.9, 25.3, 24.9, 24.5, 23.7,
 527                              23.2, 22.8, 22.4, 21.8, 21.3,
 528                              22.8, 22.1, 21.7, 21.2, 20.5,
 529                              19.9, 19.3, 18.7, 18.0, 17.1,
 530                              16.3, 15.3, 14.3, 14.3   };
 531
 532    Float_t aPckov[kNbins]  ={3.87, 3.94, 4.02, 4.11, 4.19, 4.29, 4.38,
 533                              4.48, 4.58, 4.69, 4.81, 4.93,
 534                              5.05, 5.19, 5.33, 5.48, 5.63,
 535                              5.8,  5.97, 6.16, 6.36, 6.57,
 536                              6.8,  7.04, 7.3,  7.58, 7.89,
 537                              8.22, 8.57, 8.97, 9.39 };
 538    /*
 539    Float_t effCathode[kNbins]={0.11, 0.13, 0.15, 0.16, 0.18, 0.19, 0.20,
 540                               0.21, 0.22, 0.23, 0.24, 0.26,
 541                               0.27, 0.29, 0.30, 0.29, 0.29,
 542                               0.28, 0.28, 0.27, 0.26, 0.25,
 543                               0.25, 0.23, 0.20, 0.19, 0.17,
 544                               0.17, 0.17, 0.2, 0.23};
 545    */
 546    //  Float_t aAbsSiO2[kNbins]; //quartz 30mm
 547   for(i=0;i<kNbins;i++)
 548     {
 549       aPckov[i]=aPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV
 550       rindexAir[i]=0;
 551       rindexSiO2[i]=1.458; //refractive index for qwarts
 552       rindexCathodeNext[i]=0;
 553       efficAll[i]=1.;
 554
 555       //      aAbsSiO2[i]=28.5; //quartz 30mm
 556       absorAir[i]=0.3;
 557       absorbCathodeNext[i]=0;
 558
 559     }
 560
 561
 562    gMC->SetCerenkov (idtmed[kOpGlass], kNbins, aPckov, aAbsSiO2, efficAll, rindexSiO2 );
 563    // gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2, effCathode, rindexSiO2 );
 564    gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2,efficAll , rindexSiO2 );
 565   gMC->SetCerenkov (idtmed[kOpAir], kNbins, aPckov,absorAir , efficAll,rindexAir );
 566    gMC->SetCerenkov (idtmed[kOpAirNext], kNbins, aPckov,absorbCathodeNext , efficAll, rindexCathodeNext);
 567
 568    AliDebugClass(1,": ++++++++++++++Medium set++++++++++");
 569
 570
 571 }
 572 //---------------------------------------------------------------------
 573 void AliSTARTv1::DrawDetector()
 574 {
 575 //
 576 // Draw a shaded view of the Forward multiplicity detector version 0
 577 //
 578
 579   //Set ALIC mother transparent
 580   gMC->Gsatt("ALIC","SEEN",0);
 581   //
 582   //Set volumes visible
 583   //  gMC->Gsatt("0STR","SEEN",0);
 584   //  gMC->Gsatt("0INS","SEEN",0);
 585   // gMC->Gsatt("0PMT","SEEN",1);
 586   // gMC->Gsatt("0DIV","SEEN",1);
 587   //
 588   gMC->Gdopt("hide","off");
 589   gMC->Gdopt("shad","on");
 590   gMC->SetClipBox(".");
 591   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 592   gMC->DefaultRange();
 593   gMC->Gdraw("alic",90,0,0,-35,9.5,.6,0.6);
 594   //gMC->Gdraw("alic",0,0,0,10,9.5,.8,0.8); //other side view
 595   gMC->Gdhead(1111,"T-Zero detector");
 596   gMC->Gdopt("hide","off");
 597 }
 598
 599 //-------------------------------------------------------------------
 600 void AliSTARTv1::Init()
 601 {
 602 // Initialises version 0 of the Forward Multiplicity Detector
 603 //
 604 //Int_t *idtmed  = gAlice->Idtmed();
 605   AliSTART::Init();
 606   fIdSens1=gMC->VolId("0REG");
 607
 608    AliDebug(1,Form("%s: *** START version 1 initialized ***\n",ClassName()));
 609
 610 }
 611
 612 //-------------------------------------------------------------------
 613
 614 void AliSTARTv1::StepManager()
 615 {
 616   //
 617   // Called for every step in the START Detector
 618   //
 619   Int_t id,copy,copy1;
 620   static Float_t hits[6];
 621   static Int_t vol[2];
 622   TLorentzVector pos;
 623
 624   //   TClonesArray &lhits = *fHits;
 625
 626   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 627
 628 // If particles is photon then ...
 629
 630  if (gMC->TrackPid() == 50000050)
 631   {
 632       id=gMC->CurrentVolID(copy);
 633
 634
 635       // Check the sensetive volume
 636       if(id==fIdSens1 ) {
 637         if(gMC->IsTrackEntering()) {
 638           gMC->CurrentVolOffID(2,copy);
 639           vol[1]=copy;
 640           gMC->CurrentVolOffID(3,copy1);
 641           vol[0]=copy1;
 642           gMC->TrackPosition(pos);
 643           hits[0] = pos[0];
 644           hits[1] = pos[1];
 645           hits[2] = pos[2];
 646           if(pos[2]<0) vol[0]=2;
 647           if(pos[2]>=0) vol[0]=1;
 648
 649           Float_t etot=gMC->Etot();
 650           hits[3]=etot;
 651           Int_t iPart= gMC->TrackPid();
 652           Int_t partID=gMC->IdFromPDG(iPart);
 653           hits[4]=partID;
 654           Float_t ttime=gMC->TrackTime();
 655           hits[5]=ttime*1e12;
 656           AddHit(fIshunt,vol,hits);
 657           //  cout<< gAlice->GetMCApp()->GetCurrentTrackNumber()<<" hit added "<<endl;
 658         }
 659         /*
 660                 printf("track(%i) alive(%i) disap(%i) enter(%i) exit(%i) inside(%i) out(%i) stop(%i) new(%i) \n",
 661                        gAlice->GetMCApp()->GetCurrentTrackNumber(),
 662                gMC->IsTrackAlive(),
 663                gMC->IsTrackDisappeared(),
 664                gMC->IsTrackEntering(),
 665                gMC->IsTrackExiting(),
 666                gMC->IsTrackInside(),
 667                gMC->IsTrackOut(),
 668                gMC->IsTrackStop(),
 669                gMC->IsNewTrack());
 670         */
 671       } //sensitive
 672   } //photon
 673 }
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