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, *iChamber2;
 132     iChamber1 = &fMUON->Chamber(10);
 133     Float_t zpos1=-iChamber1->Z();
 134     iChamber2 = &fMUON->Chamber(11);
 135
 136     Double_t dstation =  ( (-iChamber2->Z()) - (-iChamber1->Z()) ) /2.1;
 137     Float_t par[3];
 138     par[2] = dstation;
 139
 140 // ratio of zpos1m/zpos1p and inverse for first plane
 141     Float_t zmp=(zpos1-3.6)/(zpos1+3.6);
 142     Float_t zpm=1./zmp;
 143
 144     Int_t icount=0;  // chamber counter (0 1 2 3)
 145
 146     for (Int_t istation=0; istation<2; istation++) { // loop on stations
 147         for (Int_t iplane=0; iplane<2; iplane++) { // loop on detection planes
 148
 149             Int_t iVolNum=1; // counter Volume Number
 150             icount = Int_t(iplane*TMath::Power(2,0))+
 151                 Int_t(istation*TMath::Power(2,1));
 152
 153             iChamber = &fMUON->Chamber(10+icount);
 154             par[0] = iChamber->RInner();
 155             par[1] = iChamber->ROuter();
 156             Char_t volName[6];
 157             sprintf(volName,"%s%d", "CH",11+icount);
 158             gMC->Gsvolu(volName,"TUBE", idAir, par, 3);
 159             iChamber->GetGeometry()->SetVolume(volName);
 160
 161             Float_t zpos = - iChamber->Z();
 162
 163 /* removed 03/18/05
 164 // Flange between beam shielding and RPC
 165             tpar[0]= kRMIN[istation];
 166             tpar[1]= kRMAX[istation];
 167             tpar[2]= 4.0;
 168             char volFlange[5];
 169             sprintf(volFlange,"SF%dA",icount+1);
 170             gMC->Gsvolu(volFlange,"TUBE",idAlu1,tpar,3);     // Al
 171             // changed by ivana
 172             //gMC->Gspos(volFlange,1,"ALIC",0.,0.,zpos,0,"MANY");
 173             iChamber->GetGeometry()->GetEnvelopeStore()
 174               ->AddEnvelope(volFlange, 0, false, "MANY");
 175 */
 176
 177 // scaling factor
 178             Float_t zRatio = zpos / zpos1;
 179
 180 // envelopes (same size except line 5, all virtual)
 181             char volEnv[18][5];
 182             tpar[1] = kYMIN * zRatio;
 183             tpar[2] = 0.4;
 184             Int_t i=0;    // counter
 185             for (Int_t icolumn=0; icolumn<2; icolumn++) {
 186                 for (Int_t iline=1; iline<10; iline++){
 187                     tpar[0] = (kXMAX/2.) * zRatio;
 188                     if (iline==5) tpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
 189                     if (icolumn==0)
 190                         sprintf(volEnv[i],"S%dR%d",icount,iline);
 191                     else
 192                         sprintf(volEnv[i],"S%dL%d",icount,iline);
 193                     gMC->Gsvolu(volEnv[i],"BOX",idAir,tpar,0);
 194                     i++;
 195                 }
 196             }
 197
 198 // chamber prototype
 199             tpar[0]= 0.;
 200             tpar[1]= 0.;
 201             tpar[2]= 0.;            char volAlu[5];     // Alu
 202             char volBak[5];     // Bakelite
 203             char volGaz[5];     // Gas streamer
 204             sprintf(volAlu,"SC%dA",icount+1);
 205             sprintf(volBak,"SB%dA",icount+1);
 206             sprintf(volGaz,"S%dG",icount+11);
 207             gMC->Gsvolu(volAlu,"BOX",idAlu1,tpar,0);         // Al
 208             gMC->Gsvolu(volBak,"BOX",idtmed[1107],tpar,0);   // Bakelite
 209             gMC->Gsvolu(volGaz,"BOX",idtmed[1106],tpar,0);   // Gas streamer
 210             tpar[0] = -1.;
 211             tpar[1] = -1.;
 212             tpar[2] = 0.1;
 213             gMC->Gsposp(volGaz,1,volBak,0.,0.,0.,0,"ONLY",tpar,3);
 214             tpar[2] = 0.3;
 215             gMC->Gsposp(volBak,1,volAlu,0.,0.,0.,0,"ONLY",tpar,3);
 216
 217 // chamber type A
 218             Float_t xEnv = (kDXZERO+kXMED+(kXMAX-kXMED)/2.)*zRatio;
 219             Float_t yEnvM = 0.;  // y low position of envelope in chamber
 220             Float_t yEnvP = 0.;  // y up position of envelope in chamber
 221             Float_t yEnvPsave = 0.; // tmp data
 222             Float_t yEnvMsave = 0.; // tmp data
 223             Float_t xpos = 0.; // x position of RPC in envelope
 224             Float_t ypos = 0.; // y position of RPC in envelope
 225             dpar[2] = 0.4;
 226             dpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
 227             dpar[1] = kYMIN * zRatio;
 228
 229             detElemId = (10+icount+1)*100+4;
 230             GetEnvelopes(10+icount)->AddEnvelope(volEnv[4], detElemId, true, TGeoTranslation(xEnv,yEnvP,kZp));
 231             detElemId = (10+icount+1)*100+50+4;
 232             GetEnvelopes(10+icount)->AddEnvelope(volEnv[13], detElemId, true, TGeoTranslation(-xEnv,yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 233
 234             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[4],iVolNum++,3, dpar);
 235             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[13],iVolNum++,3, dpar);
 236
 237 // chamber type B (plus envelope chambers B & C)
 238             xEnv = (kDXZERO+kXMAX/2.)*zRatio;
 239             yEnvPsave = yEnvP;
 240             yEnvMsave = yEnvM;
 241             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 242             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 243             dpar[0] = ((kXMAX-kXMIN)/2.) * zRatio;
 244             dpar[1] = ((kYMAX-kYMIN)/2.) * zRatio;
 245             xpos = kXMIN/2. * zRatio;
 246             ypos = (kYMIN - kYMIN/4.) * zRatio;
 247
 248             detElemId = (10+icount+1)*100+3;
 249             GetEnvelopes(10+icount)->AddEnvelope(volEnv[3], detElemId, true, TGeoTranslation( xEnv,-yEnvM,kZm));
 250             detElemId = (10+icount+1)*100+5;
 251             GetEnvelopes(10+icount)->AddEnvelope(volEnv[5], detElemId, true, TGeoTranslation( xEnv, yEnvM,kZm));
 252             detElemId = (10+icount+1)*100+50+3;
 253             GetEnvelopes(10+icount)->AddEnvelope(volEnv[12], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 254             detElemId = (10+icount+1)*100+50+5;
 255             GetEnvelopes(10+icount)->AddEnvelope(volEnv[14], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 256
 257             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 258             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 259             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 260             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 261
 262 // chamber type C (note: same Z than type B)
 263             dpar[0] = (kXMAX/2)*zRatio;
 264             dpar[1] = (kYMAX/2)*zRatio;
 265             xpos = 0.;
 266             ypos = ((kYMAX - kYMIN)/2.) * zRatio;
 267
 268             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 269             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 270             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 271             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 272
 273 // chamber type D, E and F (same size)
 274 // D
 275             yEnvPsave = yEnvP;
 276             yEnvMsave = yEnvM;
 277             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 278             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 279             dpar[0] = (kXMAX/2.)*zRatio;
 280             dpar[1] =  kYMIN*zRatio;
 281
 282             detElemId = (10+icount+1)*100+2;
 283             GetEnvelopes(10+icount)->AddEnvelope(volEnv[2], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
 284             detElemId = (10+icount+1)*100+6;
 285             GetEnvelopes(10+icount)->AddEnvelope(volEnv[6], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
 286             detElemId = (10+icount+1)*100+50+2;
 287             GetEnvelopes(10+icount)->AddEnvelope(volEnv[11], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 288             detElemId = (10+icount+1)*100+50+6;
 289             GetEnvelopes(10+icount)->AddEnvelope(volEnv[15], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 290
 291             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[2],iVolNum++,3, dpar);
 292             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[6],iVolNum++,3, dpar);
 293             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[11],iVolNum++,3, dpar);
 294             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[15],iVolNum++,3, dpar);
 295
 296 // E
 297             yEnvPsave = yEnvP;
 298             yEnvMsave = yEnvM;
 299             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 300             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 301
 302             detElemId = (10+icount+1)*100+1;
 303             GetEnvelopes(10+icount)->AddEnvelope(volEnv[1], detElemId, true, TGeoTranslation(xEnv,-yEnvM,kZm));
 304             detElemId = (10+icount+1)*100+7;
 305             GetEnvelopes(10+icount)->AddEnvelope(volEnv[7], detElemId, true, TGeoTranslation(xEnv, yEnvM,kZm));
 306             detElemId = (10+icount+1)*100+50+1;
 307             GetEnvelopes(10+icount)->AddEnvelope(volEnv[10], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 308             detElemId = (10+icount+1)*100+50+7;
 309             GetEnvelopes(10+icount)->AddEnvelope(volEnv[16], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 310
 311             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[1],iVolNum++,3,dpar);
 312             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[7],iVolNum++,3,dpar);
 313             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[10],iVolNum++,3,dpar);
 314             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[16],iVolNum++,3,dpar);
 315
 316
 317 // F
 318             yEnvPsave = yEnvP;
 319             yEnvMsave = yEnvM;
 320             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 321             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 322
 323             detElemId = (10+icount+1)*100;
 324             GetEnvelopes(10+icount)->AddEnvelope(volEnv[0], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
 325             detElemId = (10+icount+1)*100+8;
 326             GetEnvelopes(10+icount)->AddEnvelope(volEnv[8], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
 327             detElemId = (10+icount+1)*100+50;
 328             GetEnvelopes(10+icount)->AddEnvelope(volEnv[9], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 329             detElemId = (10+icount+1)*100+50+8;
 330             GetEnvelopes(10+icount)->AddEnvelope(volEnv[17], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 331
 332             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[0],iVolNum++,3,dpar);
 333             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[8],iVolNum++,3,dpar);
 334             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[9],iVolNum++,3,dpar);
 335             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[17],iVolNum++,3,dpar);
 336
 337         } // end loop on detection planes
 338     } // end loop on stations
 339 }
 340
 341 //______________________________________________________________________________
 342 void AliMUONTriggerGeometryBuilder::SetTransformations()
 343 {
 344 // Defines the transformations for the trigger chambers.
 345 // ---
 346     Double_t zpos1, zpos2;
 347     AliMUONChamber *iChamber1, *iChamber2;
 348
 349     iChamber1 = &fMUON->Chamber(10);
 350     zpos1= - iChamber1->Z();
 351     iChamber1->GetGeometry()
 352         ->SetTranslation(TGeoTranslation(0., 0., zpos1));
 353
 354     iChamber2 = &fMUON->Chamber(11);
 355     zpos2 = - iChamber2->Z();
 356     iChamber2->GetGeometry()
 357         ->SetTranslation(TGeoTranslation(0., 0., zpos2));
 358
 359     iChamber1 = &fMUON->Chamber(12);
 360     zpos1 = - iChamber1->Z();
 361     iChamber1->GetGeometry()
 362         ->SetTranslation(TGeoTranslation(0., 0., zpos1));
 363
 364     iChamber2 = &fMUON->Chamber(13);
 365     zpos2 = - iChamber2->Z();
 366     iChamber2->GetGeometry()
 367         ->SetTranslation(TGeoTranslation(0., 0., zpos2));
 368 }
 369
 370 //______________________________________________________________________________
 371 void AliMUONTriggerGeometryBuilder::SetSensitiveVolumes()
 372 {
 373 // Defines the sensitive volumes for trigger station chambers.
 374 // ---
 375
 376   GetGeometry(10)->SetSensitiveVolume("S11G");
 377   GetGeometry(11)->SetSensitiveVolume("S12G");
 378   GetGeometry(12)->SetSensitiveVolume("S13G");
 379   GetGeometry(13)->SetSensitiveVolume("S14G");
 380 }
 381