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   *
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  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
  45 #include "AliSTARThit.h"
  46 #include "AliSTARTv1.h"
  47 #include "AliSTARTParameters.h"
  48
  49 #include "AliMC.h"
  50 #include "AliCDBLocal.h"
  51 #include "AliCDBStorage.h"
  52 #include "AliCDBManager.h"
  53 #include "AliCDBEntry.h"
  54
  55 ClassImp(AliSTARTv1)
  56
  57 //--------------------------------------------------------------------
  58 AliSTARTv1::AliSTARTv1(const char *name, const char *title):
  59  AliSTART(name,title)
  60 {
  61   //
  62   // Standart constructor for START Detector version 0
  63   //
  64   fIdSens1=0;
  65   fIshunt = 2;
  66 }
  67 //_____________________________________________________________________________
  68
  69 AliSTARTv1::~AliSTARTv1()
  70 {
  71   // desctructor
  72 }
  73
  74 //-------------------------------------------------------------------------
  75 void AliSTARTv1::CreateGeometry()
  76 {
  77   //
  78   // Create the geometry of START Detector version 0
  79   //
  80   // begin Html
  81   /*
  82    <img src="gif/AliSTARTv0.gif">
  83   */
  84   //
  85
  86
  87    Int_t *idtmed = fIdtmed->GetArray();
  88
  89   AliSTARTParameters* param = AliSTARTParameters::Instance();
  90   param->Init();
  91   Float_t zdetC = param->GetZposition(0);
  92   Float_t zdetA = param->GetZposition(1);
  93
  94   Int_t is;
  95   Int_t idrotm[999];
  96   Float_t x,y,z;
  97   //C T0 mother volume
  98   Float_t pstartR[18]={0., 360., 5.,
  99                        -6.8, 4.25, 10., //-76.5+0.00+69.7
 100                        -0.75 , 4.5, 10.,  // -76.5+6.05+69.7
 101                        1.25   , 4.5, 10.,  //-76.5+8.05+69.7
 102                        1.25 , 5.1, 10., //-76.5+8.05+69.7
 103                        6.8 , 5.1, 10.};  //-62.9+0.00+69.7
 104
 105   Float_t pstart[3]={4.29, 12.5,6.8};
 106   Float_t pinstart[3]={0.,1.6,6.5};
 107   Float_t ppmt[3]={0.,1.5,3.5};
 108   Float_t ptop[3]={0.,1.,1.0};
 109   Float_t preg[3]={0., 1.0, 0.005}; //photcathode dobavil bogdanov
 110   Float_t ptopout[3]={1.,1.01, 1.};  //metal air around raiator for photos reflection
 111   Float_t pbot[3]={0.6,1.2,0.1};
 112   Float_t pglass[3]={1.2,1.3,2.};
 113   Float_t pcer[3]={0.9,1.1,1.35};
 114   Float_t psteel[3]={0.9,1.1,0.15};
 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] = {0,1.4,0.04}; //kryshechka stakanchika  Al
 120   Float_t psupport7[3] = {1.5,1.6,0.4}; //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]  =  7.2; // 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]+6.9;
 154     ppcon[18]  = ppcon[15]+6.7;
 155     ppcon[19] =   4.9;
 156     ppcon[20] =   5.1;
 157
 158 //  7
 159     ppcon[21]  = ppcon[18];
 160     ppcon[22] =   4.9;
 161     ppcon[23] =   5.1;
 162
 163 /// 8
 164     ppcon[24]  = ppcon[21]+0.01;
 165     ppcon[25] =   3.15;
 166     ppcon[26] =   3.25;
 167     //   ppcon[25] =   2.25;
 168     // ppcon[26] =   2.33;
 169
 170 /// 9
 171     ppcon[27]  = ppcon[24];
 172     ppcon[28] =   ppcon[25];
 173     ppcon[29] =  ppcon[26] ;
 174
 175 //  10
 176 //    ppcon[30]  = ppcon[27]+4.5;
 177     ppcon[30]  = ppcon[27]+4.7;
 178     ppcon[31] =   2.3;
 179     ppcon[32] =  ppcon[26] ;
 180
 181 //  11
 182     ppcon[33] = ppcon[30];
 183     //    ppcon[34] =   3.15;
 184     ppcon[34] =   2.3;
 185     ppcon[35] =  ppcon[26] ;
 186
 187 //  12
 188     ppcon[36]  = ppcon[33];
 189     ppcon[37] =   ppcon[34] ;
 190     ppcon[38] =   7.6;
 191
 192     //  13
 193     ppcon[39]  = ppcon[33]+0.2;
 194     ppcon[40] =   ppcon[34] ;
 195     ppcon[41] =   7.6;
 196
 197 //  14
 198 //    ppcon[39]  = ppcon[36];
 199 //    ppcon[40] =   3.15;
 200 //    ppcon[41] =   7.6;
 201
 202
 203
 204     gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,42);
 205     //    gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,38);
 206     z=-zdetC;
 207     gMC->Gspos("0SUP",1,"ALIC",0.,0.,z,idrotm[901],"ONLY");
 208
 209  //-------------------------------------------------------------------
 210  //  START volume
 211  //-------------------------------------------------------------------
 212
 213
 214     gMC->Gsvolu("0STR","PCON",idtmed[kAir],pstartR,18);
 215     gMC->Gsvolu("0STL","TUBE",idtmed[kAir],pstart,3);
 216     gMC->Gspos("0STR",1,"ALIC",0.,0.,-zdetC+pstartR[3],idrotm[901],"ONLY");
 217     gMC->Gspos("0STL",1,"ALIC",0.,0.,zdetA+pstart[2],0,"ONLY");
 218
 219 //START interior
 220    gMC->Gsvolu("0INS","TUBE",idtmed[kAir],pinstart,3);
 221    gMC->Gsvolu("0PMT","TUBE",idtmed[kAir],ppmt,3);
 222
 223     gMC->Gsvolu("0SU1","TUBE",idtmed[kC],psupport1,3);//C kozhuh vnutri
 224     gMC->Gsvolu("0SU2","TUBE",idtmed[kC],psupport2,3);// snaruzhi  C
 225     gMC->Gsvolu("0SU3","TUBE",idtmed[kC],psupport3,3);//kryshka perednaiai  C
 226     gMC->Gsvolu("0SU4","TUBE",idtmed[kC],psupport3,3);//kryshka zadnaiai  C
 227     //    gMC->Gsvolu("0SU5","TUBE",idtmed[kAir],psupport4,3);// dyrki dlia feu v zadnej kryshke Air
 228     gMC->Gsvolu("0SU6","TUBE",idtmed[kC],psupport5,3);// stakanchik dlai feu  C
 229     gMC->Gsvolu("0SU7","TUBE",idtmed[kAl],psupport6,3);//kryshechka stakanchika  Al
 230     gMC->Gsvolu("0SU8","TUBE",idtmed[kAl],psupport7,3);//kolechko snaruzhu stakanchika Al
 231
 232 // first ring: 12 units of Scintillator+PMT+divider
 233   Float_t  theta  = (180 / TMath::Pi()) * TMath::ATan(6.5 / zdetC);
 234   Float_t angle  = 2 * TMath::Pi() / 12;
 235   Float_t phi[3];
 236
 237    for (is=0; is<12; is++)
 238       {
 239
 240         x = 6.5 * TMath::Sin(is * angle);
 241         y = 6.5 * TMath::Cos(is * angle);
 242
 243         phi[0] = -30 * is;
 244         phi[1] = 90 - is * 30;
 245         phi[2] = 90 - is * 30;
 246         for (Int_t j = 0; j < 3; j++)
 247           if (phi[j] < 0)  phi[j] += 360;
 248
 249         AliMatrix (idrotm[902 + is], 90.,         phi[0],
 250                    90. + theta, phi[1],
 251                    theta,       phi[2]);
 252         z=-pstart[2]+pinstart[2]+0.2;
 253         gMC->Gspos ("0INS", is + 1, "0STR", x, y, z, idrotm[902 + is], "ONLY");
 254         gMC->Gspos ("0INS", is + 13, "0STL", x, y, z, 0, "ONLY");
 255       }
 256
 257
 258    x=0;
 259    y=0;
 260     z=-pinstart[2]+ppmt[2]+psupport6[2]*2;
 261    gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
 262    // PMT
 263
 264    // Entry window (glass)
 265    gMC->Gsvolu("0TOP","TUBE",idtmed[kOpGlass],ptop,3); //glass
 266    z=-ppmt[2]+ptop[2];
 267    gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
 268    //"metal" air volume to simulate reclection
 269    gMC->Gsvolu("0TOO","TUBE",idtmed[kOpAir],ptopout,3);
 270    gMC->Gspos("0TOO",1,"0PMT",0,0,z,0,"ONLY");
 271
 272    //Fotokatod
 273    gMC->Gsvolu ("0REG", "TUBE", idtmed[kOpGlassCathode], preg, 3);
 274    z = -ppmt[2] + 2 * ptop[2] + preg[2];
 275    gMC->Gspos ("0REG", 1, "0PMT", 0, 0, z, 0, "ONLY");
 276   // Bottom glass
 277    gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
 278    z=ppmt[2]-pbot[2];
 279    gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
 280    // Side cylinder glass
 281    gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
 282    z=ppmt[2]-pglass[2];
 283    gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
 284    //PMT electrodes support structure
 285    gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
 286    gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
 287    z=-ppmt[2]+2*ptop[2]+0.3 + pcer[2];
 288    gMC->Gspos("0CER",1,"0PMT",0,0,z,0,"ONLY");
 289    z +=psteel[2]+pcer[2];
 290    gMC->Gspos("0STE",1,"0PMT",0,0,z,0,"ONLY");
 291
 292    //Support  left side
 293    z=-pstart[2]+psupport1[2]+0.1;
 294    gMC->Gspos("0SU1",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
 295    gMC->Gspos("0SU2",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh vnutri
 296    z=-pstart[2]+psupport3[2]+0.1;
 297    gMC->Gspos("0SU3",1,"0STR",0,0,z,0,"ONLY"); //peredniaia kryshka
 298    z=-pstart[2]+2.*psupport1[2]-0.05;//+0.1;
 299    gMC->Gspos("0SU4",1,"0STR",0,0,z,0,"MANY"); //zadnaiai kryshka
 300    gMC->Gspos("0SU6",1,"0INS",0,0,0,0,"ONLY");//C stakanchik dlia feu
 301    z=-pinstart[2]+psupport6[2];
 302    gMC->Gspos("0SU7",1,"0INS",0,0,z,0,"ONLY"); //Al kryshechka
 303
 304    z=pinstart[2]-psupport7[2];
 305    gMC->Gspos("0SU8",1,"0INS",0,0,z,0,"ONLY"); //Al kolechko
 306
 307
 308    Float_t par[3];
 309    par[0]=4.4;
 310    par[1]=4.5;
 311    par[2]=0.5;
 312    gMC->Gsvolu("0SC0","TUBE",idtmed[kC],par,3);
 313    z=ppcon[3]+par[2];
 314    gMC->Gspos("0SC0",1,"0SUP",0,0,z,0,"ONLY");
 315    z += par[2];
 316    par[0]=4.4;
 317    par[1]=5.1;
 318    par[2]=0.05;
 319    gMC->Gsvolu("0SC1","TUBE",idtmed[kC],par,3);
 320    z += par[2];
 321    gMC->Gspos("0SC1",1,"0SUP",0,0,z,0,"ONLY");
 322    z=z+par[2];
 323    par[0]=4.9;
 324    par[1]=5.0;
 325    par[2]=6.7/2;
 326     gMC->Gsvolu("0SC2","TUBE",idtmed[kC],par,3);
 327     z += par[2];
 328     gMC->Gspos("0SC2",1,"0SUP",0,0,z,0,"ONLY");
 329     z += par[2];
 330
 331      par[0]=3.15;
 332     par[1]=4.9;
 333     par[2]=0.1/2;
 334     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
 335
 336     z += par[2];
 337     gMC->Gspos("0SA1",1,"0SUP",0,0,z,0,"ONLY");
 338     z=z+par[2];
 339     par[0]=3.15;
 340     par[1]=3.16;
 341     par[2]=4.7/2;
 342     gMC->Gsvolu("0SA2","TUBE",idtmed[kAl],par,3);
 343     z += par[2];
 344     gMC->Gspos("0SA2",1,"0SUP",0,0,z,0,"ONLY");
 345     z=z+par[2];
 346     par[0]=3.16; // eta chast' prikruchena k absorberu
 347     par[1]=7.5;
 348     par[2]=0.1;
 349     gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
 350     z += par[2];
 351     gMC->Gspos("0SA3",1,"0SUP",0,0,z,0,"ONLY");
 352     par[0]=3.16; // gvozdi eta chast' prikruchena k absorberu
 353     par[1]=7.5;
 354     par[2]=0.01;
 355     gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
 356     gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"ONLY");
 357
 358
 359 }
 360 //------------------------------------------------------------------------
 361 void AliSTARTv1::CreateMaterials()
 362 {
 363    Int_t isxfld   = gAlice->Field()->Integ();
 364    Float_t sxmgmx = gAlice->Field()->Max();
 365    //   Float_t a,z,d,radl,absl,buf[1];
 366    // Int_t nbuf;
 367    Int_t *idtmed = fIdtmed->GetArray();
 368
 369 // AIR
 370
 371    Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
 372    Float_t zAir[4]={6.,7.,8.,18.};
 373    Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 374    Float_t dAir = 1.20479E-3;
 375
 376 // Scintillator CH
 377    Float_t ascin[2]={1.01,12.01};
 378    Float_t zscin[2]={1,6};
 379    Float_t wscin[2]={1,1};
 380    Float_t denscin=1.03;
 381 //Lucite C(CH3)CO2CH3
 382    Float_t alucite[3]={1.01,12.01,15.999};
 383    Float_t zlucite[3]={1,6,8};
 384    Float_t wlucite[3]={8,5,2};
 385    Float_t denlucite=1.16;
 386  // PMT glass SiO2
 387    Float_t aglass[2]={28.0855,15.9994};
 388    Float_t zglass[2]={14.,8.};
 389    Float_t wglass[2]={1.,2.};
 390    Float_t dglass=2.65;
 391 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 392    // Float_t wcer[2]={0.972,0.028};
 393    Float_t aCeramic[2]  = { 26.981539,15.9994 };
 394    Float_t zCeramic[2]  = { 13.,8. };
 395    Float_t wCeramic[2]  = { 2.,3. };
 396    Float_t denscer  = 3.6;
 397
 398 // Brass 80% Cu, 20% Zn
 399    Float_t abrass[2] = {63.546,65.39};
 400    Float_t zbrass[2] = {29,30};
 401    Float_t wbrass[2] = {0.8,0.2};
 402    Float_t denbrass=8.96;
 403
 404 //Ribber C6H12S
 405    Float_t aribber[3] = {12.,1.,32.};
 406    Float_t zribber[3] = {6.,1.,16.};
 407    Float_t wribber[3] = {6.,12.,1.};
 408    Float_t denribber=0.8;
 409 // Support inside
 410    Float_t asupport[2] = {12.,1.};
 411    Float_t zsupport[2] = {6.,1.};
 412    Float_t wsupport[2] = {1.,1.};
 413    Float_t densupport=0.1;
 414
 415 //*** Definition Of avaible START materials ***
 416    AliMaterial(0, "Steel$", 55.850,26.,7.87,1.76,999);
 417    AliMaterial(1, "Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 418    AliMixture(2, "Air$", aAir, zAir, dAir,4,wAir);
 419    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999);
 420    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999);
 421
 422    AliMixture( 3, "Ceramic  $",aCeramic, zCeramic, denscer, -2, wCeramic);
 423    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 424    /*
 425   char namate[21]="";
 426
 427    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 428    acer[0]=a;
 429
 430    zcer[0]=z;
 431    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 432    acer[1]=a;
 433    zcer[1]=z;
 434    AliMixture( 11, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 435    */
 436     AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 437    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 438    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 439    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
 440    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
 441    AliMixture( 21, "PMT Optical glass   $",aglass,zglass,dglass,-2,wglass);
 442    AliMixture( 24, "PMT Optical glass cathode $",aglass,zglass,dglass,-2,wglass);
 443     AliMixture(22, "START Opt Air$", aAir, zAir, dAir,4,wAir);
 444    AliMixture(23, "START Opt Air Next$", aAir, zAir, dAir,4,wAir);
 445
 446    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 447    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 448    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 449    AliMedium(4, "Ceramic$", 3, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 450    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 451    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 452    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 453    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 454    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 455    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 456    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 457    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 458    AliMedium(16, "OpticalGlass$", 21, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 459    AliMedium(17, "START OpAir$", 22, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 460    AliMedium(18, "START OpAirNext$", 23, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 461     AliMedium(19, "OpticalGlassCathode$", 24, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 462
 463
 464 // Definition Cherenkov parameters
 465    int i;
 466    const Int_t kNbins=31;
 467
 468    Float_t rindexSiO2[kNbins],  efficAll[kNbins], rindexAir[kNbins], absorAir[kNbins],rindexCathodeNext[kNbins], absorbCathodeNext[kNbins];
 469
 470    // quartz 20mm
 471    Float_t aAbsSiO2[kNbins]={29.0, 28.6, 28.3, 27.7, 27.3, 26.7, 26.4,
 472                              25.9, 25.3, 24.9, 24.5, 23.7,
 473                              23.2, 22.8, 22.4, 21.8, 21.3,
 474                              22.8, 22.1, 21.7, 21.2, 20.5,
 475                              19.9, 19.3, 18.7, 18.0, 17.1,
 476                              16.3, 15.3, 14.3, 14.3   };
 477
 478    Float_t aPckov[kNbins]  ={3.87, 3.94, 4.02, 4.11, 4.19, 4.29, 4.38,
 479                              4.48, 4.58, 4.69, 4.81, 4.93,
 480                              5.05, 5.19, 5.33, 5.48, 5.63,
 481                              5.8,  5.97, 6.16, 6.36, 6.57,
 482                              6.8,  7.04, 7.3,  7.58, 7.89,
 483                              8.22, 8.57, 8.97, 9.39 };
 484    /*
 485    Float_t effCathode[kNbins]={0.11, 0.13, 0.15, 0.16, 0.18, 0.19, 0.20,
 486                               0.21, 0.22, 0.23, 0.24, 0.26,
 487                               0.27, 0.29, 0.30, 0.29, 0.29,
 488                               0.28, 0.28, 0.27, 0.26, 0.25,
 489                               0.25, 0.23, 0.20, 0.19, 0.17,
 490                               0.17, 0.17, 0.2, 0.23};
 491    */
 492    //  Float_t aAbsSiO2[kNbins]; //quartz 30mm
 493   for(i=0;i<kNbins;i++)
 494     {
 495       aPckov[i]=aPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV
 496       rindexAir[i]=0;
 497       rindexSiO2[i]=1.458; //refractive index for qwarts
 498       rindexCathodeNext[i]=0;
 499       efficAll[i]=1.;
 500
 501       //      aAbsSiO2[i]=28.5; //quartz 30mm
 502       absorAir[i]=0.3;
 503       absorbCathodeNext[i]=0;
 504
 505     }
 506
 507
 508    gMC->SetCerenkov (idtmed[kOpGlass], kNbins, aPckov, aAbsSiO2, efficAll, rindexSiO2 );
 509    // gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2, effCathode, rindexSiO2 );
 510    gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2,efficAll , rindexSiO2 );
 511   gMC->SetCerenkov (idtmed[kOpAir], kNbins, aPckov,absorAir , efficAll,rindexAir );
 512    gMC->SetCerenkov (idtmed[kOpAirNext], kNbins, aPckov,absorbCathodeNext , efficAll, rindexCathodeNext);
 513
 514    AliDebugClass(1,": ++++++++++++++Medium set++++++++++");
 515
 516
 517 }
 518 //---------------------------------------------------------------------
 519 void AliSTARTv1::DrawDetector()
 520 {
 521 //
 522 // Draw a shaded view of the Forward multiplicity detector version 0
 523 //
 524
 525   //Set ALIC mother transparent
 526   gMC->Gsatt("ALIC","SEEN",0);
 527   //
 528   //Set volumes visible
 529   //  gMC->Gsatt("0STR","SEEN",0);
 530   //  gMC->Gsatt("0INS","SEEN",0);
 531   // gMC->Gsatt("0PMT","SEEN",1);
 532   // gMC->Gsatt("0DIV","SEEN",1);
 533   //
 534   gMC->Gdopt("hide","off");
 535   gMC->Gdopt("shad","on");
 536   gMC->SetClipBox(".");
 537   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 538   gMC->DefaultRange();
 539   gMC->Gdraw("alic",90,0,0,-35,9.5,.6,0.6);
 540   //gMC->Gdraw("alic",0,0,0,10,9.5,.8,0.8); //other side view
 541   gMC->Gdhead(1111,"T-Zero detector");
 542   gMC->Gdopt("hide","off");
 543 }
 544
 545 //-------------------------------------------------------------------
 546 void AliSTARTv1::Init()
 547 {
 548 // Initialises version 0 of the Forward Multiplicity Detector
 549 //
 550 //Int_t *idtmed  = gAlice->Idtmed();
 551   AliSTART::Init();
 552   fIdSens1=gMC->VolId("0REG");
 553
 554    AliDebug(1,Form("%s: *** START version 1 initialized ***\n",ClassName()));
 555
 556 }
 557
 558 //-------------------------------------------------------------------
 559
 560 void AliSTARTv1::StepManager()
 561 {
 562   //
 563   // Called for every step in the START Detector
 564   //
 565   Int_t id,copy,copy1;
 566   static Float_t hits[6];
 567   static Int_t vol[2];
 568   TLorentzVector pos;
 569
 570   //   TClonesArray &lhits = *fHits;
 571
 572   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 573
 574
 575     // If particles is photon then ...
 576
 577  if (gMC->TrackPid() == 50000050)
 578   {
 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           gMC->TrackPosition(pos);
 590           hits[0] = pos[0];
 591           hits[1] = pos[1];
 592           hits[2] = pos[2];
 593           if(pos[2]<0) vol[0]=2;
 594           if(pos[2]>=0) vol[0]=1;
 595
 596           Float_t etot=gMC->Etot();
 597           hits[3]=etot;
 598           Int_t iPart= gMC->TrackPid();
 599           Int_t partID=gMC->IdFromPDG(iPart);
 600           hits[4]=partID;
 601           Float_t ttime=gMC->TrackTime();
 602           hits[5]=ttime*1e12;
 603           AddHit(fIshunt,vol,hits);
 604           //  cout<< gAlice->GetMCApp()->GetCurrentTrackNumber()<<" hit added "<<endl;
 605         }
 606         /*
 607                 printf("track(%i) alive(%i) disap(%i) enter(%i) exit(%i) inside(%i) out(%i) stop(%i) new(%i) \n",
 608                        gAlice->GetMCApp()->GetCurrentTrackNumber(),
 609                gMC->IsTrackAlive(),
 610                gMC->IsTrackDisappeared(),
 611                gMC->IsTrackEntering(),
 612                gMC->IsTrackExiting(),
 613                gMC->IsTrackInside(),
 614                gMC->IsTrackOut(),
 615                gMC->IsTrackStop(),
 616                gMC->IsNewTrack());
 617         */
 618       } //sensitive
 619   } //photon
 620 }
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