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 #include "TGeoManager.h"
  41
  42 #include "AliLog.h"
  43 #include "AliMagF.h"
  44 #include "AliRun.h"
  45
  46 #include "AliSTARThit.h"
  47 #include "AliSTARTv1.h"
  48 #include "AliSTARTParameters.h"
  49
  50 #include "AliMC.h"
  51 #include "AliCDBLocal.h"
  52 #include "AliCDBStorage.h"
  53 #include "AliCDBManager.h"
  54 #include "AliCDBEntry.h"
  55
  56 ClassImp(AliSTARTv1)
  57
  58 //--------------------------------------------------------------------
  59 AliSTARTv1::AliSTARTv1(const char *name, const char *title):
  60   AliSTART(name,title),
  61   fIdSens1(0)
  62 {
  63   //
  64   // Standart constructor for START Detector version 0
  65   //
  66   fIshunt = 2;
  67 }
  68 //_____________________________________________________________________________
  69
  70 AliSTARTv1::~AliSTARTv1()
  71 {
  72   // desctructor
  73 }
  74
  75 //-------------------------------------------------------------------------
  76 void AliSTARTv1::CreateGeometry()
  77 {
  78   //
  79   // Create the geometry of START Detector version 0
  80   //
  81   // begin Html
  82   /*
  83    <img src="gif/AliSTARTv0.gif">
  84   */
  85   //
  86
  87
  88    Int_t *idtmed = fIdtmed->GetArray();
  89    /*
  90    AliSTARTParameters* param = AliSTARTParameters::Instance();
  91    param->Init();
  92   Float_t zdetC = param->GetZposition(0);
  93   Float_t zdetA = param->GetZposition(1);
  94    */
  95    Float_t zdetC = 69.7;
  96    Float_t zdetA = 373.;
  97
  98   Int_t is;
  99   Int_t idrotm[999];
 100   Float_t x,y,z;
 101   //C T0 mother volume
 102   Float_t pstartR[18]={0., 360., 5.,
 103                        -6.8, 4.25, 10., //-76.5+0.00+69.7
 104                        -0.75 , 4.5, 10.,  // -76.5+6.05+69.7
 105                        1.25   , 4.5, 10.,  //-76.5+8.05+69.7
 106                        1.25 , 5.1, 10., //-76.5+8.05+69.7
 107                        6.8 , 5.1, 10.};  //-62.9+0.00+69.7
 108
 109   Float_t pstart[3]={4., 12.5,6.8};
 110   Float_t pinstart[3]={0.,1.6,6.5};
 111   Float_t ppmt[3]={0.,1.5,3.5};
 112   Float_t ptop[3]={0.,1.,1.0};
 113   Float_t preg[3]={0., 1.0, 0.005}; //photcathode dobavil bogdanov
 114   Float_t ptopout[3]={1.,1.01, 1.};  //metal air around raiator for photos reflection
 115   Float_t pbot[3]={0.6,1.2,0.1};
 116   Float_t pglass[3]={1.2,1.3,2.};
 117   Float_t pcer[3]={0.9,1.1,1.35};
 118   Float_t psteel[3]={0.9,1.1,0.15};
 119   Float_t psupport1[3] = {4.51,4.6,4.0};//C kozhuh vnutri
 120   Float_t psupport2[3] = {9.4,9.5,4.0};// snaruzhi  C
 121   Float_t psupport3[3] = {4.51,9.5,0.05};//kryshki  C
 122   Float_t psupport5[3] = {1.44,1.5,6.5}; // stakanchik dlai feu  C
 123   Float_t psupport6[3] = {0,1.4,0.04}; //kryshechka stakanchika  Al
 124   Float_t psupport7[3] = {1.5,1.6,0.4}; //kolechko snaruzhu stakanchika Al
 125
 126   // Mother Volume katushka dlia krepezha vokrug truby k Absorbru
 127     AliMatrix(idrotm[901], 90., 0., 90., 90., 180., 0.);
 128   Float_t ppcon[70];
 129     ppcon[0]  =   0;
 130     ppcon[1]  = 360;
 131     ppcon[2]  =  13;
 132 //  1:
 133     ppcon[3]  =  7.2; // 14.1/2;
 134     ppcon[4]  =   4.4;
 135     ppcon[5]  =   4.5;
 136 //  2
 137     ppcon[6]  = ppcon[3]+1.;
 138     ppcon[7]  =   4.4;
 139     ppcon[8]  =   4.5;
 140 //  3
 141     ppcon[9]  = ppcon[6];
 142     ppcon[10] =   4.4;
 143     ppcon[11] =   5.1;
 144
 145 //  4
 146
 147     ppcon[12]  = ppcon[9]+0.1;
 148     ppcon[13] =   4.4;
 149     ppcon[14] =   5.1;
 150 //  5
 151
 152     ppcon[15]  = ppcon[12];
 153     ppcon[16] =   4.9;
 154     ppcon[17] =   5.1;
 155
 156 //  6
 157 //    ppcon[18]  = ppcon[15]+6.9;
 158     ppcon[18]  = ppcon[15]+6.7;
 159     ppcon[19] =   4.9;
 160     ppcon[20] =   5.1;
 161
 162 //  7
 163     ppcon[21]  = ppcon[18];
 164     ppcon[22] =   4.9;
 165     ppcon[23] =   5.1;
 166
 167 /// 8
 168     ppcon[24]  = ppcon[21]+0.01;
 169     ppcon[25] =   3.15;
 170     ppcon[26] =   3.25;
 171     //   ppcon[25] =   2.25;
 172     // ppcon[26] =   2.33;
 173
 174 /// 9
 175     ppcon[27]  = ppcon[24];
 176     ppcon[28] =   ppcon[25];
 177     ppcon[29] =  ppcon[26] ;
 178
 179 //  10
 180 //    ppcon[30]  = ppcon[27]+4.5;
 181     ppcon[30]  = ppcon[27]+4.7;
 182     ppcon[31] =   2.3;
 183     ppcon[32] =  ppcon[26] ;
 184
 185 //  11
 186     ppcon[33] = ppcon[30];
 187     //    ppcon[34] =   3.15;
 188     ppcon[34] =   2.3;
 189     ppcon[35] =  ppcon[26] ;
 190
 191 //  12
 192     ppcon[36]  = ppcon[33];
 193     ppcon[37] =   ppcon[34] ;
 194     ppcon[38] =   7.6;
 195
 196     //  13
 197     ppcon[39]  = ppcon[33]+0.2;
 198     ppcon[40] =   ppcon[34] ;
 199     ppcon[41] =   7.6;
 200
 201 //  14
 202 //    ppcon[39]  = ppcon[36];
 203 //    ppcon[40] =   3.15;
 204 //    ppcon[41] =   7.6;
 205
 206
 207
 208     gMC->Gsvolu("0SUP", "PCON", idtmed[kAl], ppcon,42);
 209     //    gMC->Gsvolu("0SUP", "PCON", idtmed[kAir], ppcon,38);
 210     z = -zdetC;
 211     gMC->Gspos("0SUP",1,"ALIC",0.,0.,z,idrotm[901],"ONLY");
 212
 213 //-------------------------------------------------------------------
 214  //  START volume
 215  //-------------------------------------------------------------------
 216
 217
 218     gMC->Gsvolu("0STR","PCON",idtmed[kAir],pstartR,18);
 219     gMC->Gsvolu("0STL","TUBE",idtmed[kAir],pstart,3);
 220     gMC->Gspos("0STR",1,"ALIC",0.,0.,-zdetC+pstartR[3],idrotm[901],"ONLY");
 221     gMC->Gspos("0STL",1,"ALIC",0.,0.,zdetA+pstart[2],0,"ONLY");
 222
 223 //START interior
 224    gMC->Gsvolu("0INS","TUBE",idtmed[kAir],pinstart,3);
 225    gMC->Gsvolu("0PMT","TUBE",idtmed[kAir],ppmt,3);
 226
 227     gMC->Gsvolu("0SU1","TUBE",idtmed[kC],psupport1,3);//C kozhuh vnutri
 228     gMC->Gsvolu("0SU2","TUBE",idtmed[kC],psupport2,3);// snaruzhi  C
 229     gMC->Gsvolu("0SU3","TUBE",idtmed[kC],psupport3,3);//kryshka perednaiai  C
 230     gMC->Gsvolu("0SU4","TUBE",idtmed[kC],psupport3,3);//kryshka zadnaiai  C
 231     //    gMC->Gsvolu("0SU5","TUBE",idtmed[kAir],psupport4,3);// dyrki dlia feu v zadnej kryshke Air
 232     gMC->Gsvolu("0SU6","TUBE",idtmed[kC],psupport5,3);// stakanchik dlai feu  C
 233     gMC->Gsvolu("0SU7","TUBE",idtmed[kAl],psupport6,3);//kryshechka stakanchika  Al
 234     gMC->Gsvolu("0SU8","TUBE",idtmed[kAl],psupport7,3);//kolechko snaruzhu stakanchika Al
 235
 236
 237
 238    //non-absorber side support  !!!!!!!!
 239
 240    Float_t ppconA[20];
 241     ppconA[0]  =   0;
 242     ppconA[1]  = 360;
 243     ppconA[2]  =  4;
 244 //  1:
 245     ppconA[3]  =  0; // 12.55/2;
 246     ppconA[4]  =   4.1;
 247     ppconA[5]  =   5.5;
 248
 249 //  2:
 250     ppconA[6]  =   ppconA[3] + 10.5;
 251     ppconA[7]  =   4.1;
 252     ppconA[8]  =   5.5;
 253
 254 //  3:
 255     ppconA[9]  =   ppconA[3] + 10.5;
 256     ppconA[10]  =   4.1;
 257     ppconA[11]  =   4.9;
 258
 259  //  4:
 260     ppconA[12]  =   ppconA[9] + 2.;
 261     ppconA[13]  =   4.1;
 262     ppconA[14]  =   4.9;
 263
 264     gMC->Gsvolu("0SUA", "PCON", idtmed[kAir], ppconA,15);
 265
 266      z =  - pstart[2];
 267     gMC->Gspos("0SUA",1,"0STL",0.,0.,z,0,"MANY");
 268     //!!!!!!!!!!!!!!!!!!!!
 269
 270
 271 // first ring: 12 units of Scintillator+PMT+divider
 272   Float_t  theta  = (180 / TMath::Pi()) * TMath::ATan(6.5 / zdetC);
 273   Float_t angle  = 2 * TMath::Pi() / 12;
 274   Float_t phi[3];
 275
 276    for (is=0; is<12; is++)
 277       {
 278
 279         x = 6.5 * TMath::Sin(is * angle);
 280         y = 6.5 * TMath::Cos(is * angle);
 281
 282         phi[0] = -30 * is;
 283         phi[1] = 90 - is * 30;
 284         phi[2] = 90 - is * 30;
 285         for (Int_t j = 0; j < 3; j++)
 286           if (phi[j] < 0)  phi[j] += 360;
 287
 288         AliMatrix (idrotm[902 + is], 90.,         phi[0],
 289                    90. + theta, phi[1],
 290                    theta,       phi[2]);
 291         z=-pstart[2]+pinstart[2]+0.2;
 292         gMC->Gspos ("0INS", is + 1, "0STR", x, y, z, idrotm[902 + is], "ONLY");
 293         gMC->Gspos ("0INS", is + 13, "0STL", x, y, z, 0, "MANY"); //!!!!!!
 294    }
 295
 296
 297    x=0;
 298    y=0;
 299     z=-pinstart[2]+ppmt[2]+psupport6[2]*2;
 300    gMC->Gspos("0PMT",1,"0INS",x,y,z,0,"ONLY");
 301    // PMT
 302
 303    // Entry window (glass)
 304    gMC->Gsvolu("0TOP","TUBE",idtmed[kOpGlass],ptop,3); //glass
 305    z=-ppmt[2]+ptop[2];
 306    gMC->Gspos("0TOP",1,"0PMT",0,0,z,0,"ONLY");
 307    //"metal" air volume to simulate reclection
 308    gMC->Gsvolu("0TOO","TUBE",idtmed[kOpAir],ptopout,3);
 309    gMC->Gspos("0TOO",1,"0PMT",0,0,z,0,"ONLY");
 310
 311    //Fotokatod
 312    gMC->Gsvolu ("0REG", "TUBE", idtmed[kOpGlassCathode], preg, 3);
 313    z = -ppmt[2] + 2 * ptop[2] + preg[2];
 314    gMC->Gspos ("0REG", 1, "0PMT", 0, 0, z, 0, "ONLY");
 315   // Bottom glass
 316    gMC->Gsvolu("0BOT","TUBE",idtmed[kGlass],pbot,3);
 317    z=ppmt[2]-pbot[2];
 318    gMC->Gspos("0BOT",1,"0PMT",0,0,z,0,"ONLY");
 319    // Side cylinder glass
 320    gMC->Gsvolu("0OUT","TUBE",idtmed[kGlass],pglass,3);
 321    z=ppmt[2]-pglass[2];
 322    gMC->Gspos("0OUT",1,"0PMT",0,0,z,0,"ONLY");
 323    //PMT electrodes support structure
 324    gMC->Gsvolu("0CER","TUBE",idtmed[kCer],pcer,3);
 325    gMC->Gsvolu("0STE","TUBE",idtmed[kSteel],psteel,3);
 326    z=-ppmt[2]+2*ptop[2]+0.3 + pcer[2];
 327    gMC->Gspos("0CER",1,"0PMT",0,0,z,0,"ONLY");
 328    z +=psteel[2]+pcer[2];
 329    gMC->Gspos("0STE",1,"0PMT",0,0,z,0,"ONLY");
 330
 331    //Support  left side
 332    z=-pstart[2]+psupport1[2]+0.1;
 333    gMC->Gspos("0SU1",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh snaruzhi
 334    gMC->Gspos("0SU2",1,"0STR",0,0,z,0,"ONLY"); //C kozhuh vnutri
 335    z=-pstart[2]+psupport3[2]+0.1;
 336    gMC->Gspos("0SU3",1,"0STR",0,0,z,0,"ONLY"); //peredniaia kryshka
 337    z=-pstart[2]+2.*psupport1[2]-0.05;//+0.1;
 338    gMC->Gspos("0SU4",1,"0STR",0,0,z,0,"MANY"); //zadnaiai kryshka
 339    gMC->Gspos("0SU6",1,"0INS",0,0,0,0,"ONLY");//C stakanchik dlia feu
 340    z=-pinstart[2]+psupport6[2];
 341    gMC->Gspos("0SU7",1,"0INS",0,0,z,0,"ONLY"); //Al kryshechka
 342
 343    z=pinstart[2]-psupport7[2];
 344    gMC->Gspos("0SU8",1,"0INS",0,0,z,0,"ONLY"); //Al kolechko
 345
 346
 347    Float_t par[3];
 348    par[0]=4.4;
 349    par[1]=4.5;
 350    par[2]=0.5;
 351    gMC->Gsvolu("0SC0","TUBE",idtmed[kC],par,3);
 352    z=ppcon[3]+par[2];
 353    gMC->Gspos("0SC0",1,"0SUP",0,0,z,0,"ONLY");
 354    z += par[2];
 355    par[0]=4.4;
 356    par[1]=5.1;
 357    par[2]=0.05;
 358    gMC->Gsvolu("0SC1","TUBE",idtmed[kC],par,3);
 359    z += par[2];
 360    gMC->Gspos("0SC1",1,"0SUP",0,0,z,0,"ONLY");
 361    z=z+par[2];
 362    par[0]=4.9;
 363    par[1]=5.0;
 364    par[2]=6.7/2;
 365     gMC->Gsvolu("0SC2","TUBE",idtmed[kC],par,3);
 366     z += par[2];
 367     gMC->Gspos("0SC2",1,"0SUP",0,0,z,0,"ONLY");
 368     z += par[2];
 369
 370     par[0]=3.15;
 371     par[1]=4.9;
 372     par[2]=0.1/2;
 373     gMC->Gsvolu("0SA1","TUBE",idtmed[kAl],par,3);
 374
 375     z += par[2];
 376     gMC->Gspos("0SA1",1,"0SUP",0,0,z,0,"ONLY");
 377     z=z+par[2];
 378     par[0]=3.15;
 379     par[1]=3.16;
 380     par[2]=4.7/2;
 381     gMC->Gsvolu("0SA2","TUBE",idtmed[kAl],par,3);
 382     z += par[2];
 383     gMC->Gspos("0SA2",1,"0SUP",0,0,z,0,"ONLY");
 384     z=z+par[2];
 385     par[0]=3.16; // eta chast' prikruchena k absorberu
 386     par[1]=7.5;
 387     par[2]=0.1;
 388     gMC->Gsvolu("0SA3","TUBE",idtmed[kAl],par,3);
 389     z += par[2];
 390     gMC->Gspos("0SA3",1,"0SUP",0,0,z,0,"ONLY");
 391     par[0]=3.16; // gvozdi eta chast' prikruchena k absorberu
 392     par[1]=7.5;
 393     par[2]=0.01;
 394     gMC->Gsvolu("0SN2","TUBE",idtmed[kSteel],par,3);
 395     gMC->Gspos("0SN2",1,"0SUP",0,0,z,0,"ONLY");
 396
 397
 398
 399
 400 }
 401 //------------------------------------------------------------------------
 402 void AliSTARTv1::AddAlignableVolumes() const
 403 {
 404   //
 405   // Create entries for alignable volumes associating the symbolic volume
 406   // name with the corresponding volume path. Needs to be syncronized with
 407   // eventual changes in the geometry.
 408   //
 409
 410   TString volPath;
 411   TString symName, sn;
 412
 413   TString vpA  = "/ALIC_1/0STL_1/0INS_";
 414   TString vpC  = "/ALIC_1/0STR_1/0INS_";
 415   TString vpInside  = "/0PMT_1/0TOP_1";
 416
 417
 418   for (Int_t imod=0; imod<24; imod++)
 419     {
 420       if (imod < 12)
 421         {volPath  = vpC; sn="T0/C/PMT";}
 422       else
 423         {volPath  = vpA; sn="T0/A/PMT";}
 424       volPath += imod+1;
 425       volPath += vpInside;
 426
 427       symName = sn;
 428       symName += imod+1;
 429
 430       AliDebug(2,"--------------------------------------------");
 431       AliDebug(2,Form("Alignable object %d", imod));
 432       AliDebug(2,Form("volPath=%s\n",volPath.Data()));
 433       AliDebug(2,Form("symName=%s\n",symName.Data()));
 434       AliDebug(2,"--------------------------------------------");
 435       //  gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data());
 436       if(!gGeoManager->SetAlignableEntry(symName.Data(),volPath.Data()))
 437         AliFatal(Form("Alignable entry %s not created. Volume path %s not valid",
 438                       symName.Data(),volPath.Data()));
 439
 440     }
 441 }
 442 //------------------------------------------------------------------------
 443 void AliSTARTv1::CreateMaterials()
 444 {
 445    Int_t isxfld   = gAlice->Field()->Integ();
 446    Float_t sxmgmx = gAlice->Field()->Max();
 447    //   Float_t a,z,d,radl,absl,buf[1];
 448    // Int_t nbuf;
 449    Int_t *idtmed = fIdtmed->GetArray();
 450
 451 // AIR
 452
 453    Float_t aAir[4]={12.0107,14.0067,15.9994,39.948};
 454    Float_t zAir[4]={6.,7.,8.,18.};
 455    Float_t wAir[4]={0.000124,0.755267,0.231781,0.012827};
 456    Float_t dAir = 1.20479E-3;
 457
 458 // Scintillator CH
 459    Float_t ascin[2]={1.01,12.01};
 460    Float_t zscin[2]={1,6};
 461    Float_t wscin[2]={1,1};
 462    Float_t denscin=1.03;
 463 //Lucite C(CH3)CO2CH3
 464    Float_t alucite[3]={1.01,12.01,15.999};
 465    Float_t zlucite[3]={1,6,8};
 466    Float_t wlucite[3]={8,5,2};
 467    Float_t denlucite=1.16;
 468  // PMT glass SiO2
 469    Float_t aglass[2]={28.0855,15.9994};
 470    Float_t zglass[2]={14.,8.};
 471    Float_t wglass[2]={1.,2.};
 472    Float_t dglass=2.65;
 473 // Ceramic   97.2% Al2O3 , 2.8% SiO2
 474    // Float_t wcer[2]={0.972,0.028};
 475    Float_t aCeramic[2]  = { 26.981539,15.9994 };
 476    Float_t zCeramic[2]  = { 13.,8. };
 477    Float_t wCeramic[2]  = { 2.,3. };
 478    Float_t denscer  = 3.6;
 479
 480 // Brass 80% Cu, 20% Zn
 481    Float_t abrass[2] = {63.546,65.39};
 482    Float_t zbrass[2] = {29,30};
 483    Float_t wbrass[2] = {0.8,0.2};
 484    Float_t denbrass=8.96;
 485
 486 //Ribber C6H12S
 487    Float_t aribber[3] = {12.,1.,32.};
 488    Float_t zribber[3] = {6.,1.,16.};
 489    Float_t wribber[3] = {6.,12.,1.};
 490    Float_t denribber=0.8;
 491 // Support inside
 492    Float_t asupport[2] = {12.,1.};
 493    Float_t zsupport[2] = {6.,1.};
 494    Float_t wsupport[2] = {1.,1.};
 495    Float_t densupport=0.1;
 496
 497 //*** Definition Of avaible START materials ***
 498    AliMaterial(0, "Steel$", 55.850,26.,7.87,1.76,999);
 499    AliMaterial(1, "Vacuum$", 1.e-16,1.e-16,1.e-16,1.e16,999);
 500    AliMixture(2, "Air$", aAir, zAir, dAir,4,wAir);
 501    AliMaterial(10, "CarbonPlastic$", 12.01, 6.0, 2.26, 18.8,999);
 502    AliMaterial(11, "Aliminium$", 26.98, 13.0, 2.7, 8.9,999);
 503
 504    AliMixture( 3, "Ceramic  $",aCeramic, zCeramic, denscer, -2, wCeramic);
 505    AliMixture( 4, "PMT glass   $",aglass,zglass,dglass,-2,wglass);
 506    /*
 507   char namate[21]="";
 508
 509    gMC->Gfmate((*fIdmate)[3], namate, a, z, d, radl, absl, buf, nbuf);
 510    acer[0]=a;
 511
 512    zcer[0]=z;
 513    gMC->Gfmate((*fIdmate)[4], namate, a, z, d, radl, absl, buf, nbuf);
 514    acer[1]=a;
 515    zcer[1]=z;
 516    AliMixture( 11, "Ceramic    $", acer, zcer, denscer, 2, wcer);
 517    */
 518     AliMixture( 5, "Scintillator$",ascin,zscin,denscin,-2,wscin);
 519    AliMixture( 6, "Brass    $", abrass, zbrass, denbrass, 2, wbrass);
 520    AliMixture( 7, "Ribber $",aribber,zribber,denribber,-3,wribber);
 521    AliMixture( 8, "Lucite$",alucite,zlucite,denlucite,-3,wlucite);
 522    AliMixture( 9, "Penoplast$",asupport,zsupport,densupport,-2,wsupport);
 523    AliMixture( 21, "PMT Optical glass   $",aglass,zglass,dglass,-2,wglass);
 524    AliMixture( 24, "PMT Optical glass cathode $",aglass,zglass,dglass,-2,wglass);
 525     AliMixture(22, "START Opt Air$", aAir, zAir, dAir,4,wAir);
 526    AliMixture(23, "START Opt Air Next$", aAir, zAir, dAir,4,wAir);
 527
 528    AliMedium(1, "START Air$", 2, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 529    AliMedium(2, "Scintillator$", 5, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 530    AliMedium(3, "Vacuum$", 1, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 531    AliMedium(4, "Ceramic$", 3, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 532    AliMedium(6, "Glass$", 4, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 533    AliMedium(8, "Steel$", 0, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
 534    AliMedium(9, "Ribber  $", 7, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 535    AliMedium(11, "Brass  $", 6, 0, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 536    AliMedium(12, "Lucite$", 8, 1, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 537    AliMedium(13, "CarbonPlastic$", 10, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 538    AliMedium(14, "PenoPlast$", 9, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 539    AliMedium(15, "Aluminium$", 11, 0, isxfld, sxmgmx, 10., .01, 1., .003, .003);
 540    AliMedium(16, "OpticalGlass$", 21, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 541    AliMedium(17, "START OpAir$", 22, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 542    AliMedium(18, "START OpAirNext$", 23, 0, isxfld, sxmgmx, 10., .1, 1., .003, .003);
 543     AliMedium(19, "OpticalGlassCathode$", 24, 1, isxfld, sxmgmx, 10., .01, .1, .003, .003);
 544
 545
 546 // Definition Cherenkov parameters
 547    int i;
 548    const Int_t kNbins=31;
 549
 550    Float_t rindexSiO2[kNbins],  efficAll[kNbins], rindexAir[kNbins], absorAir[kNbins],rindexCathodeNext[kNbins], absorbCathodeNext[kNbins];
 551
 552    // quartz 20mm
 553    Float_t aAbsSiO2[kNbins]={29.0, 28.6, 28.3, 27.7, 27.3, 26.7, 26.4,
 554                              25.9, 25.3, 24.9, 24.5, 23.7,
 555                              23.2, 22.8, 22.4, 21.8, 21.3,
 556                              22.8, 22.1, 21.7, 21.2, 20.5,
 557                              19.9, 19.3, 18.7, 18.0, 17.1,
 558                              16.3, 15.3, 14.3, 14.3   };
 559
 560    Float_t aPckov[kNbins]  ={3.87, 3.94, 4.02, 4.11, 4.19, 4.29, 4.38,
 561                              4.48, 4.58, 4.69, 4.81, 4.93,
 562                              5.05, 5.19, 5.33, 5.48, 5.63,
 563                              5.8,  5.97, 6.16, 6.36, 6.57,
 564                              6.8,  7.04, 7.3,  7.58, 7.89,
 565                              8.22, 8.57, 8.97, 9.39 };
 566    /*
 567    Float_t effCathode[kNbins]={0.11, 0.13, 0.15, 0.16, 0.18, 0.19, 0.20,
 568                               0.21, 0.22, 0.23, 0.24, 0.26,
 569                               0.27, 0.29, 0.30, 0.29, 0.29,
 570                               0.28, 0.28, 0.27, 0.26, 0.25,
 571                               0.25, 0.23, 0.20, 0.19, 0.17,
 572                               0.17, 0.17, 0.2, 0.23};
 573    */
 574    //  Float_t aAbsSiO2[kNbins]; //quartz 30mm
 575   for(i=0;i<kNbins;i++)
 576     {
 577       aPckov[i]=aPckov[i]*1e-9;//Photons energy bins 4 eV - 8.5 eV step 0.1 eV
 578       rindexAir[i]=0;
 579       rindexSiO2[i]=1.458; //refractive index for qwarts
 580       rindexCathodeNext[i]=0;
 581       efficAll[i]=1.;
 582
 583       //      aAbsSiO2[i]=28.5; //quartz 30mm
 584       absorAir[i]=0.3;
 585       absorbCathodeNext[i]=0;
 586
 587     }
 588
 589
 590    gMC->SetCerenkov (idtmed[kOpGlass], kNbins, aPckov, aAbsSiO2, efficAll, rindexSiO2 );
 591    // gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2, effCathode, rindexSiO2 );
 592    gMC->SetCerenkov (idtmed[kOpGlassCathode], kNbins, aPckov, aAbsSiO2,efficAll , rindexSiO2 );
 593   gMC->SetCerenkov (idtmed[kOpAir], kNbins, aPckov,absorAir , efficAll,rindexAir );
 594    gMC->SetCerenkov (idtmed[kOpAirNext], kNbins, aPckov,absorbCathodeNext , efficAll, rindexCathodeNext);
 595
 596    AliDebugClass(1,": ++++++++++++++Medium set++++++++++");
 597
 598
 599 }
 600 //---------------------------------------------------------------------
 601 void AliSTARTv1::DrawDetector()
 602 {
 603 //
 604 // Draw a shaded view of the Forward multiplicity detector version 0
 605 //
 606
 607   //Set ALIC mother transparent
 608   gMC->Gsatt("ALIC","SEEN",0);
 609   //
 610   //Set volumes visible
 611   //  gMC->Gsatt("0STR","SEEN",0);
 612   //  gMC->Gsatt("0INS","SEEN",0);
 613   // gMC->Gsatt("0PMT","SEEN",1);
 614   // gMC->Gsatt("0DIV","SEEN",1);
 615   //
 616   gMC->Gdopt("hide","off");
 617   gMC->Gdopt("shad","on");
 618   gMC->SetClipBox(".");
 619   gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
 620   gMC->DefaultRange();
 621   gMC->Gdraw("alic",90,0,0,-35,9.5,.6,0.6);
 622   //gMC->Gdraw("alic",0,0,0,10,9.5,.8,0.8); //other side view
 623   gMC->Gdhead(1111,"T-Zero detector");
 624   gMC->Gdopt("hide","off");
 625 }
 626
 627 //-------------------------------------------------------------------
 628 void AliSTARTv1::Init()
 629 {
 630 // Initialises version 0 of the Forward Multiplicity Detector
 631 //
 632 //Int_t *idtmed  = gAlice->Idtmed();
 633   AliSTART::Init();
 634   fIdSens1=gMC->VolId("0REG");
 635
 636    AliDebug(1,Form("%s: *** START version 1 initialized ***\n",ClassName()));
 637
 638 }
 639
 640 //-------------------------------------------------------------------
 641
 642 void AliSTARTv1::StepManager()
 643 {
 644   //
 645   // Called for every step in the START Detector
 646   //
 647   Int_t id,copy,copy1;
 648   static Float_t hits[6];
 649   static Int_t vol[2];
 650   TLorentzVector pos;
 651
 652   //   TClonesArray &lhits = *fHits;
 653
 654   if(!gMC->IsTrackAlive()) return; // particle has disappeared
 655
 656
 657     // If particles is photon then ...
 658
 659  if (gMC->TrackPid() == 50000050)
 660   {
 661       id=gMC->CurrentVolID(copy);
 662
 663
 664       // Check the sensetive volume
 665       if(id==fIdSens1 ) {
 666         if(gMC->IsTrackEntering()) {
 667           gMC->CurrentVolOffID(2,copy);
 668           vol[1]=copy;
 669           gMC->CurrentVolOffID(3,copy1);
 670           vol[0]=copy1;
 671           gMC->TrackPosition(pos);
 672           hits[0] = pos[0];
 673           hits[1] = pos[1];
 674           hits[2] = pos[2];
 675           if(pos[2]<0) vol[0]=2;
 676           if(pos[2]>=0) vol[0]=1;
 677
 678           Float_t etot=gMC->Etot();
 679           hits[3]=etot;
 680           Int_t iPart= gMC->TrackPid();
 681           Int_t partID=gMC->IdFromPDG(iPart);
 682           hits[4]=partID;
 683           Float_t ttime=gMC->TrackTime();
 684           hits[5]=ttime*1e12;
 685           AddHit(fIshunt,vol,hits);
 686           //  cout<< gAlice->GetMCApp()->GetCurrentTrackNumber()<<" hit added "<<endl;
 687         }
 688         /*
 689                 printf("track(%i) alive(%i) disap(%i) enter(%i) exit(%i) inside(%i) out(%i) stop(%i) new(%i) \n",
 690                        gAlice->GetMCApp()->GetCurrentTrackNumber(),
 691                gMC->IsTrackAlive(),
 692                gMC->IsTrackDisappeared(),
 693                gMC->IsTrackEntering(),
 694                gMC->IsTrackExiting(),
 695                gMC->IsTrackInside(),
 696                gMC->IsTrackOut(),
 697                gMC->IsTrackStop(),
 698                gMC->IsNewTrack());
 699         */
 700       } //sensitive
 701   } //photon
 702 }
 703
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