MUON/AliMUONTriggerGeometryBuilder.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 // Class AliMUONTriggerGeometryBuilder
  19 // -----------------------------------
  20 // MUON Trigger stations geometry construction class.
  21 //
  22 // Author: Philippe Crochette, LPC Clermont-Ferrand
  23
  24 #include <TVirtualMC.h>
  25 #include <TGeoMatrix.h>
  26
  27 #include "AliLog.h"
  28
  29 #include "AliMUONTriggerGeometryBuilder.h"
  30 #include "AliMUON.h"
  31 #include "AliMUONChamber.h"
  32 #include "AliMUONGeometryModule.h"
  33 #include "AliMUONGeometryEnvelopeStore.h"
  34
  35 ClassImp(AliMUONTriggerGeometryBuilder)
  36
  37 //______________________________________________________________________________
  38 AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder(AliMUON* muon)
  39  : AliMUONVGeometryBuilder("trigger.dat",
  40                            muon->Chamber(10).GetGeometry(),
  41                            muon->Chamber(11).GetGeometry(),
  42                            muon->Chamber(12).GetGeometry(),
  43                            muon->Chamber(13).GetGeometry()),
  44    fMUON(muon)
  45 {
  46 // Standard constructor
  47
  48 }
  49
  50 //______________________________________________________________________________
  51 AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder()
  52  : AliMUONVGeometryBuilder(),
  53    fMUON(0)
  54 {
  55 // Default constructor
  56 }
  57
  58
  59 //______________________________________________________________________________
  60 AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder(const AliMUONTriggerGeometryBuilder& rhs)
  61   : AliMUONVGeometryBuilder(rhs)
  62 {
  63 // Protected copy constructor
  64
  65   AliFatal("Copy constructor is not implemented.");
  66 }
  67
  68 //______________________________________________________________________________
  69 AliMUONTriggerGeometryBuilder::~AliMUONTriggerGeometryBuilder() {
  70 //
  71 }
  72
  73 //______________________________________________________________________________
  74 AliMUONTriggerGeometryBuilder&
  75 AliMUONTriggerGeometryBuilder::operator = (const AliMUONTriggerGeometryBuilder& rhs)
  76 {
  77 // Protected assignement operator
  78
  79   // check assignement to self
  80   if (this == &rhs) return *this;
  81
  82   AliFatal("Assignment operator is not implemented.");
  83
  84   return *this;
  85 }
  86
  87 //
  88 // public methods
  89 //
  90
  91 //______________________________________________________________________________
  92 void AliMUONTriggerGeometryBuilder::CreateGeometry()
  93 {
  94 // From AliMUONv1::CreateGeometry()
  95
  96     /*
  97        zpos1 and zpos2 are the middle of the first and second
  98        planes of station 1 (+1m for second station):
  99        zpos1=(zpos1m+zpos1p)/2=(15999+16071)/2=16035 mm, thick/2=40 mm
 100        zpos2=(zpos2m+zpos2p)/2=(16169+16241)/2=16205 mm, thick/2=40 mm
 101        zposxm and zposxp= middles of gaz gaps within a detection plane
 102        rem: the total thickness accounts for 1 mm of al on both
 103        side of the RPCs (see zpos1 and zpos2)
 104     */
 105
 106     Int_t *idtmed = fMUON->GetIdtmed()->GetArray()-1099;
 107     Int_t idAir= idtmed[1100]; // medium 1
 108     Int_t idAlu1=idtmed[1103]; // medium 4
 109     Int_t detElemId=0;          // Detection Element Number
 110     Float_t tpar[3];
 111     Double_t dpar[3];
 112
 113 // vertical gap between right and left chambers (kDXZERO*2=4cm)
 114     const Float_t kDXZERO=2.;
 115 // main distances for chamber definition in first plane/first station
 116     const Float_t kXMIN=34.;
 117     const Float_t kXMED=51.;
 118     const Float_t kXMAX=255.;
 119 // 090704 kXMAX changed from 272 to 255.
 120 // (see fig.2-4 & 2-5 of Local Trigger Board PRR)
 121 // segmentation updated accordingly
 122     const Float_t kYMIN=34.;
 123     const Float_t kYMAX=51.;
 124 // inner/outer radius of flange between beam shield. and chambers (1/station)
 125     const Float_t kRMIN[2]={50.,50.};
 126     const Float_t kRMAX[2]={64.,68.};
 127 // z position of the middle of the gas gap in mother vol
 128     const Float_t kZm=-3.6;
 129     const Float_t kZp=+3.6;
 130
 131     AliMUONChamber *iChamber, *iChamber1;
 132     iChamber1 = &fMUON->Chamber(10);
 133     Float_t zpos1=-iChamber1->Z();
 134
 135 // ratio of zpos1m/zpos1p and inverse for first plane
 136     Float_t zmp=(zpos1-3.6)/(zpos1+3.6);
 137     Float_t zpm=1./zmp;
 138
 139     Int_t icount=0;  // chamber counter (0 1 2 3)
 140
 141     for (Int_t istation=0; istation<2; istation++) { // loop on stations
 142         for (Int_t iplane=0; iplane<2; iplane++) { // loop on detection planes
 143
 144             Int_t iVolNum=1; // counter Volume Number
 145             icount = Int_t(iplane*TMath::Power(2,0))+
 146                 Int_t(istation*TMath::Power(2,1));
 147
 148             iChamber = &fMUON->Chamber(10+icount);
 149             Float_t zpos = - iChamber->Z();
 150
 151 // Flange between beam shielding and RPC
 152             tpar[0]= kRMIN[istation];
 153             tpar[1]= kRMAX[istation];
 154             tpar[2]= 4.0;
 155             char volFlange[5];
 156             sprintf(volFlange,"SF%dA",icount+1);
 157             gMC->Gsvolu(volFlange,"TUBE",idAlu1,tpar,3);     // Al
 158             // changed by ivana
 159             //gMC->Gspos(volFlange,1,"ALIC",0.,0.,zpos,0,"MANY");
 160             iChamber->GetGeometry()->GetEnvelopeStore()
 161               ->AddEnvelope(volFlange, 0, false, "MANY");
 162
 163 // scaling factor
 164             Float_t zRatio = zpos / zpos1;
 165
 166 // envelopes (same size except line 5, all virtual)
 167             char volEnv[18][5];
 168             tpar[1] = kYMIN * zRatio;
 169             tpar[2] = 0.4;
 170             Int_t i=0;    // counter
 171             for (Int_t icolumn=0; icolumn<2; icolumn++) {
 172                 for (Int_t iline=1; iline<10; iline++){
 173                     tpar[0] = (kXMAX/2.) * zRatio;
 174                     if (iline==5) tpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
 175                     if (icolumn==0)
 176                         sprintf(volEnv[i],"S%dR%d",icount,iline);
 177                     else
 178                         sprintf(volEnv[i],"S%dL%d",icount,iline);
 179                     gMC->Gsvolu(volEnv[i],"BOX",idAir,tpar,0);
 180                     i++;
 181                 }
 182             }
 183
 184 // chamber prototype
 185             tpar[0]= 0.;
 186             tpar[1]= 0.;
 187             tpar[2]= 0.;
 188             char volAlu[5];     // Alu
 189             char volBak[5];     // Bakelite
 190             char volGaz[5];     // Gas streamer
 191             sprintf(volAlu,"SC%dA",icount+1);
 192             sprintf(volBak,"SB%dA",icount+1);
 193             sprintf(volGaz,"SG%dA",icount+1);
 194             gMC->Gsvolu(volAlu,"BOX",idAlu1,tpar,0);         // Al
 195             gMC->Gsvolu(volBak,"BOX",idtmed[1107],tpar,0);   // Bakelite
 196             gMC->Gsvolu(volGaz,"BOX",idtmed[1106],tpar,0);   // Gas streamer
 197             tpar[0] = -1.;
 198             tpar[1] = -1.;
 199             tpar[2] = 0.1;
 200             gMC->Gsposp(volGaz,1,volBak,0.,0.,0.,0,"ONLY",tpar,3);
 201             tpar[2] = 0.3;
 202             gMC->Gsposp(volBak,1,volAlu,0.,0.,0.,0,"ONLY",tpar,3);
 203
 204 // chamber type A
 205             Float_t xEnv = (kDXZERO+kXMED+(kXMAX-kXMED)/2.)*zRatio;
 206             Float_t yEnvM = 0.;  // y low position of envelope in chamber
 207             Float_t yEnvP = 0.;  // y up position of envelope in chamber
 208             Float_t yEnvPsave = 0.; // tmp data
 209             Float_t yEnvMsave = 0.; // tmp data
 210             Float_t xpos = 0.; // x position of RPC in envelope
 211             Float_t ypos = 0.; // y position of RPC in envelope
 212             dpar[2] = 0.4;
 213             dpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
 214             dpar[1] = kYMIN * zRatio;
 215
 216             detElemId = (10+icount+1)*100+4;
 217             GetEnvelopes(10+icount)->AddEnvelope(volEnv[4], detElemId, true, TGeoTranslation(xEnv,yEnvM,kZm));
 218             detElemId = (10+icount+1)*100+50+4;
 219             GetEnvelopes(10+icount)->AddEnvelope(volEnv[13], detElemId, true, TGeoTranslation(-xEnv,yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 220
 221             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[4],iVolNum++,3, dpar);
 222             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[13],iVolNum++,3, dpar);
 223
 224 // chamber type B (plus envelope chambers B & C)
 225             xEnv = (kDXZERO+kXMAX/2.)*zRatio;
 226             yEnvPsave = yEnvP;
 227             yEnvMsave = yEnvM;
 228             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 229             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 230             dpar[0] = ((kXMAX-kXMIN)/2.) * zRatio;
 231             dpar[1] = ((kYMAX-kYMIN)/2.) * zRatio;
 232             xpos = kXMIN/2. * zRatio;
 233             ypos = (kYMIN - kYMIN/4.) * zRatio;
 234
 235             detElemId = (10+icount+1)*100+3;
 236             GetEnvelopes(10+icount)->AddEnvelope(volEnv[3], detElemId, true, TGeoTranslation( xEnv,-yEnvP,kZp));
 237             detElemId = (10+icount+1)*100+5;
 238             GetEnvelopes(10+icount)->AddEnvelope(volEnv[5], detElemId, true, TGeoTranslation( xEnv, yEnvP,kZp));
 239             detElemId = (10+icount+1)*100+50+3;
 240             GetEnvelopes(10+icount)->AddEnvelope(volEnv[12], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 241             detElemId = (10+icount+1)*100+50+5;
 242             GetEnvelopes(10+icount)->AddEnvelope(volEnv[14], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 243
 244             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 245             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 246             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 247             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 248
 249 // chamber type C (note: same Z than type B)
 250             dpar[0] = (kXMAX/2)*zRatio;
 251             dpar[1] = (kYMAX/2)*zRatio;
 252             xpos = 0.;
 253             ypos = ((kYMAX - kYMIN)/2.) * zRatio;
 254
 255             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 256             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 257             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 258             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 259
 260 // chamber type D, E and F (same size)
 261 // D
 262             yEnvPsave = yEnvP;
 263             yEnvMsave = yEnvM;
 264             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 265             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 266             dpar[0] = (kXMAX/2.)*zRatio;
 267             dpar[1] =  kYMIN*zRatio;
 268
 269             detElemId = (10+icount+1)*100+2;
 270             GetEnvelopes(10+icount)->AddEnvelope(volEnv[2], detElemId, true, TGeoTranslation(xEnv,-yEnvM,kZm));
 271             detElemId = (10+icount+1)*100+6;
 272             GetEnvelopes(10+icount)->AddEnvelope(volEnv[6], detElemId, true, TGeoTranslation(xEnv, yEnvM,kZm));
 273             detElemId = (10+icount+1)*100+50+2;
 274             GetEnvelopes(10+icount)->AddEnvelope(volEnv[11], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 275             detElemId = (10+icount+1)*100+50+6;
 276             GetEnvelopes(10+icount)->AddEnvelope(volEnv[15], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 277
 278             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[2],iVolNum++,3, dpar);
 279             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[6],iVolNum++,3, dpar);
 280             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[11],iVolNum++,3, dpar);
 281             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[15],iVolNum++,3, dpar);
 282
 283 // E
 284             yEnvPsave = yEnvP;
 285             yEnvMsave = yEnvM;
 286             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 287             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 288
 289             detElemId = (10+icount+1)*100+1;
 290             GetEnvelopes(10+icount)->AddEnvelope(volEnv[1], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
 291             detElemId = (10+icount+1)*100+7;
 292             GetEnvelopes(10+icount)->AddEnvelope(volEnv[7], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
 293             detElemId = (10+icount+1)*100+50+1;
 294             GetEnvelopes(10+icount)->AddEnvelope(volEnv[10], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 295             detElemId = (10+icount+1)*100+50+7;
 296             GetEnvelopes(10+icount)->AddEnvelope(volEnv[16], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 297
 298             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[1],iVolNum++,3,dpar);
 299             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[7],iVolNum++,3,dpar);
 300             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[10],iVolNum++,3,dpar);
 301             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[16],iVolNum++,3,dpar);
 302
 303
 304 // F
 305             yEnvPsave = yEnvP;
 306             yEnvMsave = yEnvM;
 307             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 308             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 309
 310             detElemId = (10+icount+1)*100;
 311             GetEnvelopes(10+icount)->AddEnvelope(volEnv[0], detElemId, true, TGeoTranslation(xEnv,-yEnvM,kZm));
 312             detElemId = (10+icount+1)*100+8;
 313             GetEnvelopes(10+icount)->AddEnvelope(volEnv[8], detElemId, true, TGeoTranslation(xEnv, yEnvM,kZm));
 314             detElemId = (10+icount+1)*100+50;
 315             GetEnvelopes(10+icount)->AddEnvelope(volEnv[9], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 316             detElemId = (10+icount+1)*100+50+8;
 317             GetEnvelopes(10+icount)->AddEnvelope(volEnv[17], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 318
 319             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[0],iVolNum++,3,dpar);
 320             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[8],iVolNum++,3,dpar);
 321             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[9],iVolNum++,3,dpar);
 322             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[17],iVolNum++,3,dpar);
 323
 324         } // end loop on detection planes
 325     } // end loop on stations
 326 }
 327
 328 //______________________________________________________________________________
 329 void AliMUONTriggerGeometryBuilder::SetTransformations()
 330 {
 331 // Defines the transformations for the trigger chambers.
 332 // ---
 333     Double_t zpos1, zpos2;
 334     AliMUONChamber *iChamber1, *iChamber2;
 335
 336     iChamber1 = &fMUON->Chamber(10);
 337     zpos1= - iChamber1->Z();
 338     iChamber1->GetGeometry()
 339         ->SetTranslation(TGeoTranslation(0., 0., zpos1));
 340
 341     iChamber2 = &fMUON->Chamber(11);
 342     zpos2 = - iChamber2->Z();
 343     iChamber2->GetGeometry()
 344         ->SetTranslation(TGeoTranslation(0., 0., zpos2));
 345
 346     iChamber1 = &fMUON->Chamber(12);
 347     zpos1 = - iChamber1->Z();
 348     iChamber1->GetGeometry()
 349         ->SetTranslation(TGeoTranslation(0., 0., zpos1));
 350
 351     iChamber2 = &fMUON->Chamber(13);
 352     zpos2 = - iChamber2->Z();
 353     iChamber2->GetGeometry()
 354         ->SetTranslation(TGeoTranslation(0., 0., zpos2));
 355 }
 356
 357 //______________________________________________________________________________
 358 void AliMUONTriggerGeometryBuilder::SetSensitiveVolumes()
 359 {
 360 // Defines the sensitive volumes for trigger station chambers.
 361 // ---
 362
 363   GetGeometry(10)->SetSensitiveVolume("SG1A");
 364   GetGeometry(11)->SetSensitiveVolume("SG2A");
 365   GetGeometry(12)->SetSensitiveVolume("SG3A");
 366   GetGeometry(13)->SetSensitiveVolume("SG4A");
 367 }
 368