TOF/AliTOFv4.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 $Log$
  18 Revision 1.9  1999/09/29 09:24:33  fca
  19 Introduction of the Copyright and cvs Log
  20
  21 */
  22
  23 ///////////////////////////////////////////////////////////////////////////////
  24 //                                                                           //
  25 //  Time Of Flight: design of C.Williams                FCA                  //
  26 //  This class contains the functions for version 1 of the Time Of Flight    //
  27 //  detector.                                                                //
  28 //
  29 //  VERSION WITH 5 MODULES AND FLAT PLATES
  30 //
  31 //   WITH HOLES FOR PHOS AND HMPID inside the
  32 //   SPACE FRAME WITH HOLES
  33 //
  34 //   Authors:
  35 //
  36 //   Alessio Seganti
  37 //   Domenico Vicinanza
  38 //
  39 //   University of Salerno - Italy
  40 //
  41 //
  42 //Begin_Html
  43 /*
  44 <img src="picts/AliTOFv4Class.gif">
  45 */
  46 //End_Html
  47 //                                                                           //
  48 ///////////////////////////////////////////////////////////////////////////////
  49
  50 #include "AliTOFv4.h"
  51 #include "AliRun.h"
  52 #include "AliConst.h"
  53
  54 ClassImp(AliTOFv4)
  55
  56 //_____________________________________________________________________________
  57 AliTOFv4::AliTOFv4()
  58 {
  59   //
  60   // Default constructor
  61   //
  62 }
  63
  64 //_____________________________________________________________________________
  65 AliTOFv4::AliTOFv4(const char *name, const char *title)
  66        : AliTOF(name,title)
  67 {
  68   //
  69   // Standard constructor
  70   //
  71 }
  72
  73 //_____________________________________________________________________________
  74 void AliTOFv4::CreateGeometry()
  75 {
  76   //
  77   // Create geometry for Time Of Flight version 0
  78   //
  79   //Begin_Html
  80   /*
  81     <img src="picts/AliTOFv4.gif">
  82   */
  83   //End_Html
  84   //
  85   // Creates common geometry
  86   //
  87   AliTOF::CreateGeometry();
  88 }
  89
  90 //_____________________________________________________________________________
  91 void AliTOFv4::TOFpc(Float_t xtof, Float_t ytof, Float_t zlen1,
  92                      Float_t zlen2, Float_t zlen3, Float_t ztof0)
  93 {
  94   //
  95   // Definition of the Time Of Fligh Resistive Plate Chambers
  96   // xFLT, yFLT, zFLT - sizes of TOF modules (large)
  97
  98   Int_t idrotm[100];
  99   Float_t  ycoor, zcoor;
 100   Float_t par[10];
 101   Float_t yFREON, xp, yp, zp;
 102
 103   Int_t *idtmed = fIdtmed->GetArray()-499;
 104
 105   par[0] =  xtof / 2.;
 106   par[1] =  ytof / 2.;
 107   par[2] = zlen1 / 2.;
 108   gMC->Gsvolu("FTO1", "BOX ", idtmed[506], par, 3);
 109   par[2] = zlen2 / 2.;
 110   gMC->Gsvolu("FTO2", "BOX ", idtmed[506], par, 3);
 111   par[2] = zlen3 / 2.;
 112   gMC->Gsvolu("FTO3", "BOX ", idtmed[506], par, 3);
 113
 114
 115 // Positioning of modules
 116
 117    Float_t zcor1 = ztof0 - zlen1/2;
 118    Float_t zcor2 = ztof0 - zlen1 - zlen2/2.;
 119    Float_t zcor3 = 0.;
 120
 121    AliMatrix(idrotm[0], 90., 0., 0., 0., 90, -90.);
 122    AliMatrix(idrotm[1], 90., 180., 0., 0., 90, 90.);
 123    gMC->Gspos("FTO1", 1, "BTO1", 0,  zcor1, 0, idrotm[0], "ONLY");
 124    gMC->Gspos("FTO1", 2, "BTO1", 0, -zcor1, 0, idrotm[1], "ONLY");
 125    zcoor = (zlen1/2.);
 126    gMC->Gspos("FTO1", 1, "BTO2", 0,  zcoor, 0, idrotm[0], "ONLY");
 127    zcoor = 0.;
 128    gMC->Gspos("FTO1", 1, "BTO3", 0,  zcoor, 0, idrotm[0], "ONLY");
 129
 130    gMC->Gspos("FTO2", 1, "BTO1", 0,  zcor2, 0, idrotm[0], "ONLY");
 131    gMC->Gspos("FTO2", 2, "BTO1", 0, -zcor2, 0, idrotm[1], "ONLY");
 132    zcoor = -zlen2/2.;
 133    gMC->Gspos("FTO2", 0, "BTO2", 0,  zcoor, 0, idrotm[0], "ONLY");
 134
 135    gMC->Gspos("FTO3", 0, "BTO1", 0, zcor3,  0, idrotm[0], "ONLY");
 136
 137 // Subtraction the distance to TOF module boundaries
 138
 139   Float_t db = 7.;
 140   Float_t xFLT, yFLT, zFLT1, zFLT2, zFLT3;
 141
 142   xFLT = xtof -(.5 +.5)*2;
 143   yFLT = ytof;
 144   zFLT1 = zlen1 - db;
 145   zFLT2 = zlen2 - db;
 146   zFLT3 = zlen3 - db;
 147
 148
 149
 150 // freon gaps in MRPC chamber
 151   yFREON = .11; //cm
 152
 153 // Sizes of MRPC pads
 154
 155   xp = 3.0;
 156   yp = 12.3*0.05; // 5% X0 of glass
 157   zp = 3.0;
 158
 159 //  Subtraction of dead boundaries in X=2 cm and Z=7/2 cm
 160
 161 cout <<"************************* TOF geometry **************************"<<endl;
 162
 163   Int_t nz1, nz2, nz3, nx; //- numbers of pixels
 164   nx = Int_t (xFLT/xp);
 165
 166   printf("Number of pixel along x axis = %i",nx);
 167
 168   par[0] = xFLT/2;
 169   par[1] = yFLT/2;
 170   par[2] = (zFLT1 / 2.);
 171   nz1 = Int_t (par[2]*2/zp);
 172   gMC->Gsvolu("FLT1", "BOX ", idtmed[506], par, 3); // CO2
 173   gMC->Gspos("FLT1", 0, "FTO1", 0., 0., 0., 0, "ONLY");
 174   printf("Number of pixel along z axis (module 1) = %i",nz1);
 175
 176   par[2] = (zFLT2 / 2.);
 177   nz2 = Int_t (par[2]*2/zp);
 178   gMC->Gsvolu("FLT2", "BOX ", idtmed[506], par, 3); // CO2
 179   gMC->Gspos("FLT2", 0, "FTO2", 0., 0., 0., 0, "ONLY");
 180   printf("Number of pixel along z axis (module 2) = %i",nz2);
 181
 182   par[2] = (zFLT3 / 2.);
 183   nz3 = Int_t (par[2]*2/zp);
 184   gMC->Gsvolu("FLT3", "BOX ", idtmed[506], par, 3); // CO2
 185   gMC->Gspos("FLT3", 0, "FTO3", 0., 0., 0., 0, "ONLY");
 186   printf("Number of pixel along z axis (module 3) = %i",nz3);
 187
 188 ////////// Layers before detector ////////////////////
 189
 190 // Alluminium layer in front 1.0 mm thick at the beginning
 191   par[0] = -1;
 192   par[1] = 0.1;
 193   par[2] = -1;
 194   ycoor = -yFLT/2 + par[1];
 195   gMC->Gsvolu("FMY1", "BOX ", idtmed[508], par, 3); // Alluminium
 196   gMC->Gspos("FMY1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
 197   gMC->Gsvolu("FMY2", "BOX ", idtmed[508], par, 3); // Alluminium
 198   gMC->Gspos("FMY2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
 199   gMC->Gsvolu("FMY3", "BOX ", idtmed[508], par, 3); // Alluminium
 200   gMC->Gspos("FMY3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
 201
 202 // Honeycomb layer (1cm of special polyethilene)
 203   ycoor = ycoor + par[1];
 204   par[0] = -1;
 205   par[1] = 0.5;
 206   par[2] = -1;
 207   ycoor = ycoor + par[1];
 208   gMC->Gsvolu("FPL1", "BOX ", idtmed[503], par, 3); // Hony
 209   gMC->Gspos("FPL1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
 210   gMC->Gsvolu("FPL2", "BOX ", idtmed[503], par, 3); // Hony
 211   gMC->Gspos("FPL2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
 212   gMC->Gsvolu("FPL3", "BOX ", idtmed[503], par, 3); // Hony
 213   gMC->Gspos("FPL3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
 214
 215 ///////////////// Detector itself //////////////////////
 216
 217   const Float_t SpaceBefore=2.; // Space Beetween detector &  Front Panel
 218
 219   par[0] = -1;
 220   par[1] = yp/2; // 5 %X0 thick of glass
 221   par[2] = -1;
 222   ycoor = -yFLT/2 + SpaceBefore;
 223   gMC->Gsvolu("FLD1", "BOX ", idtmed[514], par, 3); // Glass
 224   gMC->Gspos("FLD1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
 225   gMC->Gsvolu("FLD2", "BOX ", idtmed[514], par, 3); // Glass
 226   gMC->Gspos("FLD2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
 227   gMC->Gsvolu("FLD3", "BOX ", idtmed[514], par, 3); // Glass
 228   gMC->Gspos("FLD3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
 229
 230   gMC->Gsdvn("FLZ1", "FLD1", nz1, 3); //pixel size xp=zp=3
 231   gMC->Gsdvn("FLZ2", "FLD2", nz2, 3);
 232   gMC->Gsdvn("FLZ3", "FLD3", nz3, 3);
 233   gMC->Gsdvn("FLX1", "FLZ1", nx, 1);
 234   gMC->Gsdvn("FLX2", "FLZ2", nx, 1);
 235   gMC->Gsdvn("FLX3", "FLZ3", nx, 1);
 236
 237 // MRPC pixel itself
 238   par[0] = -1;//xp/2;
 239   par[1] = -1;//yp/2; // 5 %X0 thick of glass
 240   par[2] = -1;//zp/2;
 241   gMC->Gsvolu("FPA0", "BOX ", idtmed[514], par, 3);// Glass
 242   gMC->Gspos("FPA0", 1, "FLX1", 0., 0., 0., 0, "ONLY");
 243   gMC->Gspos("FPA0", 2, "FLX2", 0., 0., 0., 0, "ONLY");
 244   gMC->Gspos("FPA0", 3, "FLX3", 0., 0., 0., 0, "ONLY");
 245
 246 // Freon gas sencitive vol.ume
 247   par[0] = -1;
 248   par[1] = yFREON/2;
 249   par[2] = -1;
 250   gMC->Gsvolu("FPAD", "BOX ", idtmed[513], par, 3);// Freon
 251   gMC->Gspos("FPAD", 0, "FPA0", 0., 0., 0., 0, "ONLY");
 252
 253 ////////// Layers after detector ////////////////////
 254
 255   const Float_t SpaceAfter = 6.; //Space beetween detector & Back Panel
 256
 257 // Honeycomb layer after (3cm)
 258   par[0] = -1;
 259   par[1] = 0.6;
 260   par[2] = -1;
 261   ycoor = -yFLT/2 + SpaceAfter - par[1];
 262   gMC->Gsvolu("FPE1", "BOX ", idtmed[503], par, 3); // Hony
 263   gMC->Gspos("FPE1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
 264   gMC->Gsvolu("FPE2", "BOX ", idtmed[503], par, 3); // Hony
 265   gMC->Gspos("FPE2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
 266   gMC->Gsvolu("FPE3", "BOX ", idtmed[503], par, 3); // Hony
 267   gMC->Gspos("FPE3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
 268
 269 // Electronics (Cu) after
 270   par[0] = -1;
 271   par[1] = 1.43*0.05 / 2.; // 5% of X0
 272   par[2] = -1;
 273   ycoor = -yFLT/2 + SpaceAfter +par[1];
 274   gMC->Gsvolu("FEC1", "BOX ", idtmed[501], par, 3); // Cu
 275   gMC->Gspos("FEC1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
 276   gMC->Gsvolu("FEC2", "BOX ", idtmed[501], par, 3); // Cu
 277   gMC->Gspos("FEC2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
 278   gMC->Gsvolu("FEC3", "BOX ", idtmed[501], par, 3); // Cu
 279   gMC->Gspos("FEC3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
 280
 281 // Cooling water after
 282   ycoor = ycoor+par[1];
 283   par[0] = -1;
 284   par[1] = 36.1*0.02 / 2.; // 2% of X0
 285   par[2] = -1;
 286   ycoor = ycoor+par[1];
 287   gMC->Gsvolu("FWA1", "BOX ", idtmed[515], par, 3); // Water
 288   gMC->Gspos("FWA1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
 289   gMC->Gsvolu("FWA2", "BOX ", idtmed[515], par, 3); // Water
 290   gMC->Gspos("FWA2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
 291   gMC->Gsvolu("FWA3", "BOX ", idtmed[515], par, 3); // Water
 292   gMC->Gspos("FWA3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
 293
 294 //back plate honycomb (2cm)
 295   par[0] = -1;
 296   par[1] = 1.;
 297   par[2] = -1;
 298   ycoor = yFLT/2 - par[1];
 299   gMC->Gsvolu("FEG1", "BOX ", idtmed[503], par, 3); // Hony
 300   gMC->Gspos("FEG1", 0, "FLT1", 0., ycoor, 0., 0, "ONLY");
 301   gMC->Gsvolu("FEG2", "BOX ", idtmed[503], par, 3); // Hony
 302   gMC->Gspos("FEG2", 0, "FLT2", 0., ycoor, 0., 0, "ONLY");
 303   gMC->Gsvolu("FEG3", "BOX ", idtmed[503], par, 3); // Hony
 304   gMC->Gspos("FEG3", 0, "FLT3", 0., ycoor, 0., 0, "ONLY");
 305 }
 306
 307 //_____________________________________________________________________________
 308 void AliTOFv4::DrawModule()
 309 {
 310   //
 311   // Draw a shaded view of the Time Of Flight version 1
 312   //
 313   // Set everything unseen
 314   gMC->Gsatt("*", "seen", -1);
 315   //
 316   // Set ALIC mother transparent
 317   gMC->Gsatt("ALIC","SEEN",0);
 318   //
 319   // Set the volumes visible
 320   gMC->Gsatt("ALIC","SEEN",0);
 321   gMC->Gsatt("FBAR","SEEN",1);
 322   gMC->Gsatt("FTO1","SEEN",1);
 323   gMC->Gsatt("FTO2","SEEN",1);
 324   gMC->Gsatt("FTO3","SEEN",1);
 325   gMC->Gsatt("FBT1","SEEN",1);
 326   gMC->Gsatt("FBT2","SEEN",1);
 327   gMC->Gsatt("FBT3","SEEN",1);
 328   gMC->Gsatt("FDT1","SEEN",1);
 329   gMC->Gsatt("FDT2","SEEN",1);
 330   gMC->Gsatt("FDT3","SEEN",1);
 331   gMC->Gsatt("FLT1","SEEN",1);
 332   gMC->Gsatt("FLT2","SEEN",1);
 333   gMC->Gsatt("FLT3","SEEN",1);
 334   gMC->Gsatt("FPL1","SEEN",1);
 335   gMC->Gsatt("FPL2","SEEN",1);
 336   gMC->Gsatt("FPL3","SEEN",1);
 337   gMC->Gsatt("FLD1","SEEN",1);
 338   gMC->Gsatt("FLD2","SEEN",1);
 339   gMC->Gsatt("FLD3","SEEN",1);
 340   gMC->Gsatt("FLZ1","SEEN",1);
 341   gMC->Gsatt("FLZ2","SEEN",1);
 342   gMC->Gsatt("FLZ3","SEEN",1);
 343   gMC->Gsatt("FLX1","SEEN",1);
 344   gMC->Gsatt("FLX2","SEEN",1);
 345   gMC->Gsatt("FLX3","SEEN",1);
 346   gMC->Gsatt("FPA0","SEEN",1);
 347   //
 348   gMC->Gdopt("hide", "on");
 349   gMC->Gdopt("shad", "on");
 350   gMC->Gsatt("*", "fill", 7);
 351   gMC->SetClipBox(".");
 352   gMC->SetClipBox("*", 0, 1000, -1000, 1000, -1000, 1000);
 353   gMC->DefaultRange();
 354   gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .02, .02);
 355   gMC->Gdhead(1111, "Time Of Flight");
 356   gMC->Gdman(18, 4, "MAN");
 357   gMC->Gdopt("hide","off");
 358 }
 359
 360 //_____________________________________________________________________________
 361 void AliTOFv4::CreateMaterials()
 362 {
 363   //
 364   // Define materials for the Time Of Flight
 365   //
 366   AliTOF::CreateMaterials();
 367 }
 368
 369 //_____________________________________________________________________________
 370 void AliTOFv4::Init()
 371 {
 372   //
 373   // Initialise the detector after the geometry has been defined
 374   //
 375   AliTOF::Init();
 376   fIdFTO2=gMC->VolId("FTO2");
 377   fIdFTO3=gMC->VolId("FTO3");
 378   fIdFLT1=gMC->VolId("FLT1");
 379   fIdFLT2=gMC->VolId("FLT2");
 380   fIdFLT3=gMC->VolId("FLT3");
 381 }
 382
 383 //_____________________________________________________________________________
 384 void AliTOFv4::StepManager()
 385 {
 386   //
 387   // Procedure called at each step in the Time Of Flight
 388   //
 389   TLorentzVector mom, pos;
 390   Float_t hits[8];
 391   Int_t vol[3];
 392   Int_t copy, id, i;
 393   Int_t *idtmed = fIdtmed->GetArray()-499;
 394   if(gMC->GetMedium()==idtmed[514-1] &&
 395      gMC->IsTrackEntering() && gMC->TrackCharge()
 396      && gMC->CurrentVolID(copy)==fIdSens) {
 397     TClonesArray &lhits = *fHits;
 398     //
 399     // Record only charged tracks at entrance
 400     gMC->CurrentVolOffID(1,copy);
 401     vol[2]=copy;
 402     gMC->CurrentVolOffID(3,copy);
 403     vol[1]=copy;
 404     id=gMC->CurrentVolOffID(8,copy);
 405     vol[0]=copy;
 406     if(id==fIdFTO3) {
 407       vol[0]+=22;
 408       id=gMC->CurrentVolOffID(5,copy);
 409       if(id==fIdFLT3) vol[1]+=6;
 410     } else if (id==fIdFTO2) {
 411       vol[0]+=20;
 412       id=gMC->CurrentVolOffID(5,copy);
 413       if(id==fIdFLT2) vol[1]+=8;
 414     } else {
 415       id=gMC->CurrentVolOffID(5,copy);
 416       if(id==fIdFLT1) vol[1]+=14;
 417     }
 418     gMC->TrackPosition(pos);
 419     gMC->TrackMomentum(mom);
 420     //
 421     Double_t ptot=mom.Rho();
 422     Double_t norm=1/ptot;
 423     for(i=0;i<3;++i) {
 424       hits[i]=pos[i];
 425       hits[i+3]=mom[i]*norm;
 426     }
 427     hits[6]=ptot;
 428     hits[7]=pos[3];
 429     new(lhits[fNhits++]) AliTOFhit(fIshunt,gAlice->CurrentTrack(),vol,hits);
 430   }
 431 }
 432