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