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