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   *
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  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 "AliMUONConstants.h"
  32 #include "AliMUONGeometryModule.h"
  33 #include "AliMUONGeometryEnvelopeStore.h"
  34
  35 ClassImp(AliMUONTriggerGeometryBuilder)
  36
  37 //______________________________________________________________________________
  38 AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder(AliMUON* muon)
  39  : AliMUONVGeometryBuilder(10, 11, 12, 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   AliFatal("Copy constructor is not implemented.");
  62 }
  63
  64 //______________________________________________________________________________
  65 AliMUONTriggerGeometryBuilder::~AliMUONTriggerGeometryBuilder() {
  66 //
  67 }
  68
  69 //______________________________________________________________________________
  70 AliMUONTriggerGeometryBuilder&
  71 AliMUONTriggerGeometryBuilder::operator = (const AliMUONTriggerGeometryBuilder& rhs)
  72 {
  73 // Protected assignement operator
  74
  75   // check assignement to self
  76   if (this == &rhs) return *this;
  77
  78   AliFatal("Assignment operator is not implemented.");
  79
  80   return *this;
  81 }
  82
  83 //
  84 // public methods
  85 //
  86
  87 //______________________________________________________________________________
  88 void AliMUONTriggerGeometryBuilder::CreateGeometry()
  89 {
  90 // From AliMUONv1::CreateGeometry()
  91
  92     /*
  93        zpos1 and zpos2 are the middle of the first and second
  94        planes of station 1 (+1m for second station):
  95        zpos1=(zpos1m+zpos1p)/2=(15999+16071)/2=16035 mm, thick/2=40 mm
  96        zpos2=(zpos2m+zpos2p)/2=(16169+16241)/2=16205 mm, thick/2=40 mm
  97        zposxm and zposxp= middles of gaz gaps within a detection plane
  98        rem: the total thickness accounts for 1 mm of al on both
  99        side of the RPCs (see zpos1 and zpos2)
 100     */
 101
 102     Int_t *idtmed = fMUON->GetIdtmed()->GetArray()-1099;
 103     Int_t idAir= idtmed[1100]; // medium 1
 104     Int_t idAlu1=idtmed[1103]; // medium 4
 105     Int_t detElemId=0;          // Detection Element Number
 106     Float_t tpar[3];
 107     Double_t dpar[3];
 108
 109 // vertical gap between right and left chambers (kDXZERO*2=4cm)
 110     const Float_t kDXZERO=2.;
 111 // main distances for chamber definition in first plane/first station
 112     const Float_t kXMIN=34.;
 113     const Float_t kXMED=51.;
 114     const Float_t kXMAX=255.;
 115 // 090704 kXMAX changed from 272 to 255.
 116 // (see fig.2-4 & 2-5 of Local Trigger Board PRR)
 117 // segmentation updated accordingly
 118     const Float_t kYMIN=34.;
 119     const Float_t kYMAX=51.;
 120 // inner/outer radius of flange between beam shield. and chambers (1/station)
 121 //    const Float_t kRMIN[2]={50.,50.};
 122 //    const Float_t kRMAX[2]={64.,68.};
 123 // z position of the middle of the gas gap in mother vol
 124     const Float_t kZm=-3.6;
 125     const Float_t kZp=+3.6;
 126
 127     Float_t zpos1= AliMUONConstants::DefaultChamberZ(10);
 128     Double_t dstation =  ( ( - AliMUONConstants::DefaultChamberZ(11)) -
 129                            ( - AliMUONConstants::DefaultChamberZ(10)) ) /2.1;
 130     Float_t par[3];
 131     par[2] = dstation;
 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<<0)+Int_t(istation<<1);
 144
 145             par[0] = AliMUONConstants::Rmin(5+istation);
 146             par[1] = AliMUONConstants::Rmax(5+istation);
 147             Char_t volName[6];
 148             sprintf(volName,"%s%d", "SC",11+icount);
 149             gMC->Gsvolu(volName,"TUBE", idAir, par, 3);
 150             //SetVolume(10+icount, volName);
 151 //          Float_t zpos =  AliMUONConstants::DefaultChamberZ(10+icount);
 152
 153 /* removed 03/18/05
 154 // Flange between beam shielding and RPC
 155             tpar[0]= kRMIN[istation];
 156             tpar[1]= kRMAX[istation];
 157             tpar[2]= 4.0;
 158             char volFlange[5];
 159             sprintf(volFlange,"SF%dA",icount+1);
 160             gMC->Gsvolu(volFlange,"TUBE",idAlu1,tpar,3);     // Al
 161             // changed by ivana
 162             //gMC->Gspos(volFlange,1,"ALIC",0.,0.,zpos,0,"MANY");
 163             iChamber->GetGeometry()->GetEnvelopeStore()
 164               ->AddEnvelope(volFlange, 0, false, "MANY");
 165 */
 166
 167 // scaling factor
 168 //          Float_t zRatio = zpos / zpos1;
 169             Float_t zRatio = AliMUONConstants::DefaultRatioTriggerChamber(icount);
 170
 171
 172
 173
 174 // envelopes (same size except line 5, all virtual)
 175             char volEnv[18][5];
 176             tpar[1] = kYMIN * zRatio;
 177             tpar[2] = 0.4;
 178             Int_t i=0;    // counter
 179             for (Int_t icolumn=0; icolumn<2; icolumn++) {
 180                 for (Int_t iline=1; iline<10; iline++){
 181                     tpar[0] = (kXMAX/2.) * zRatio;
 182                     if (iline==5) tpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
 183                     if (icolumn==0)
 184                         sprintf(volEnv[i],"S%dR%d",icount,iline);
 185                     else
 186                         sprintf(volEnv[i],"S%dL%d",icount,iline);
 187                     // gMC->Gsvolu(volEnv[i],"BOX",idAir,tpar,0);
 188                     i++;
 189                 }
 190             }
 191
 192 // chamber prototype
 193             tpar[0]= 0.;
 194             tpar[1]= 0.;
 195             tpar[2]= 0.;            char volAlu[5];     // Alu
 196             char volBak[5];     // Bakelite
 197             char volGaz[5];     // Gas streamer
 198             sprintf(volAlu,"SC%dA",icount+1);
 199             sprintf(volBak,"SB%dA",icount+1);
 200             sprintf(volGaz,"S%dG",icount+11);
 201             gMC->Gsvolu(volAlu,"BOX",idAlu1,tpar,0);         // Al
 202             gMC->Gsvolu(volBak,"BOX",idtmed[1107],tpar,0);   // Bakelite
 203             gMC->Gsvolu(volGaz,"BOX",idtmed[1106],tpar,0);   // Gas streamer
 204             tpar[0] = -1.;
 205             tpar[1] = -1.;
 206             tpar[2] = 0.1;
 207             gMC->Gsposp(volGaz,1,volBak,0.,0.,0.,0,"ONLY",tpar,3);
 208             tpar[2] = 0.3;
 209             gMC->Gsposp(volBak,1,volAlu,0.,0.,0.,0,"ONLY",tpar,3);
 210
 211 // chamber type A
 212             Float_t xEnv = (kDXZERO+kXMED+(kXMAX-kXMED)/2.)*zRatio;
 213             Float_t yEnvM = 0.;  // y low position of envelope in chamber
 214             Float_t yEnvP = 0.;  // y up position of envelope in chamber
 215             Float_t yEnvPsave = 0.; // tmp data
 216             Float_t yEnvMsave = 0.; // tmp data
 217             Float_t xpos = 0.; // x position of RPC in envelope
 218             Float_t ypos = 0.; // y position of RPC in envelope
 219             dpar[2] = 0.4;
 220             dpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
 221             dpar[1] = kYMIN * zRatio;
 222
 223             detElemId = (10+icount+1)*100;
 224             GetEnvelopes(10+icount)->AddEnvelope(volEnv[4], detElemId, true, TGeoTranslation(xEnv,yEnvP,kZp));
 225             detElemId = (10+icount+1)*100+9;
 226             GetEnvelopes(10+icount)->AddEnvelope(volEnv[13], detElemId, true, TGeoTranslation(-xEnv,yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 227
 228             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[4],iVolNum++,3, dpar);
 229             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[13],iVolNum++,3, dpar);
 230
 231 // chamber type B (plus envelope chambers B & C)
 232             xEnv = (kDXZERO+kXMAX/2.)*zRatio;
 233             yEnvPsave = yEnvP;
 234             yEnvMsave = yEnvM;
 235             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 236             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 237             dpar[0] = ((kXMAX-kXMIN)/2.) * zRatio;
 238             dpar[1] = ((kYMAX-kYMIN)/2.) * zRatio;
 239             xpos = kXMIN/2. * zRatio;
 240             ypos = (kYMIN - kYMIN/4.) * zRatio;
 241
 242             detElemId = (10+icount+1)*100+17;
 243             GetEnvelopes(10+icount)->AddEnvelope(volEnv[3], detElemId, true, TGeoTranslation( xEnv,-yEnvM,kZm));
 244             detElemId = (10+icount+1)*100+1;
 245             GetEnvelopes(10+icount)->AddEnvelope(volEnv[5], detElemId, true, TGeoTranslation( xEnv, yEnvM,kZm));
 246             detElemId = (10+icount+1)*100+10;
 247             GetEnvelopes(10+icount)->AddEnvelope(volEnv[12], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 248             detElemId = (10+icount+1)*100+8;
 249             GetEnvelopes(10+icount)->AddEnvelope(volEnv[14], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 250
 251             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 252             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 253             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 254             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 255
 256 // chamber type C (note: same Z than type B)
 257             dpar[0] = (kXMAX/2)*zRatio;
 258             dpar[1] = (kYMAX/2)*zRatio;
 259             xpos = 0.;
 260             ypos = ((kYMAX - kYMIN)/2.) * zRatio;
 261
 262             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 263             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 264             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 265             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 266
 267 // chamber type D, E and F (same size)
 268 // D
 269             yEnvPsave = yEnvP;
 270             yEnvMsave = yEnvM;
 271             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 272             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 273             dpar[0] = (kXMAX/2.)*zRatio;
 274             dpar[1] =  kYMIN*zRatio;
 275
 276             detElemId = (10+icount+1)*100+16;
 277             GetEnvelopes(10+icount)->AddEnvelope(volEnv[2], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
 278             detElemId = (10+icount+1)*100+2;
 279             GetEnvelopes(10+icount)->AddEnvelope(volEnv[6], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
 280             detElemId = (10+icount+1)*100+11;
 281             GetEnvelopes(10+icount)->AddEnvelope(volEnv[11], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 282             detElemId = (10+icount+1)*100+7;
 283             GetEnvelopes(10+icount)->AddEnvelope(volEnv[15], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 284
 285             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[2],iVolNum++,3, dpar);
 286             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[6],iVolNum++,3, dpar);
 287             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[11],iVolNum++,3, dpar);
 288             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[15],iVolNum++,3, dpar);
 289
 290 // E
 291             yEnvPsave = yEnvP;
 292             yEnvMsave = yEnvM;
 293             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 294             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 295
 296             detElemId = (10+icount+1)*100+15;
 297             GetEnvelopes(10+icount)->AddEnvelope(volEnv[1], detElemId, true, TGeoTranslation(xEnv,-yEnvM,kZm));
 298             detElemId = (10+icount+1)*100+3;
 299             GetEnvelopes(10+icount)->AddEnvelope(volEnv[7], detElemId, true, TGeoTranslation(xEnv, yEnvM,kZm));
 300             detElemId = (10+icount+1)*100+12;
 301             GetEnvelopes(10+icount)->AddEnvelope(volEnv[10], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 302             detElemId = (10+icount+1)*100+6;
 303             GetEnvelopes(10+icount)->AddEnvelope(volEnv[16], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 304
 305             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[1],iVolNum++,3,dpar);
 306             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[7],iVolNum++,3,dpar);
 307             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[10],iVolNum++,3,dpar);
 308             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[16],iVolNum++,3,dpar);
 309
 310
 311 // F
 312             yEnvPsave = yEnvP;
 313             yEnvMsave = yEnvM;
 314             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 315             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 316
 317             detElemId = (10+icount+1)*100+14;
 318             GetEnvelopes(10+icount)->AddEnvelope(volEnv[0], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
 319             detElemId = (10+icount+1)*100+4;
 320             GetEnvelopes(10+icount)->AddEnvelope(volEnv[8], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
 321             detElemId = (10+icount+1)*100+13;
 322             GetEnvelopes(10+icount)->AddEnvelope(volEnv[9], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 323             detElemId = (10+icount+1)*100+5;
 324             GetEnvelopes(10+icount)->AddEnvelope(volEnv[17], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 325
 326             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[0],iVolNum++,3,dpar);
 327             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[8],iVolNum++,3,dpar);
 328             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[9],iVolNum++,3,dpar);
 329             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[17],iVolNum++,3,dpar);
 330
 331         } // end loop on detection planes
 332     } // end loop on stations
 333 }
 334
 335 //______________________________________________________________________________
 336 void AliMUONTriggerGeometryBuilder::SetTransformations()
 337 {
 338 // Defines the transformations for the trigger chambers.
 339 // ---
 340
 341     SetVolume(10, "SC11");
 342     SetVolume(11, "SC12");
 343     SetVolume(12, "SC13");
 344     SetVolume(13, "SC14");
 345
 346     Double_t zpos1= AliMUONConstants::DefaultChamberZ(10);
 347     SetTranslation(10, TGeoTranslation(0., 0., zpos1));
 348
 349     zpos1= AliMUONConstants::DefaultChamberZ(11);
 350     SetTranslation(11, TGeoTranslation(0., 0., zpos1));
 351
 352     zpos1= AliMUONConstants::DefaultChamberZ(12);
 353     SetTranslation(12, TGeoTranslation(0., 0., zpos1));
 354
 355     zpos1= AliMUONConstants::DefaultChamberZ(13);
 356     SetTranslation(13, TGeoTranslation(0., 0., zpos1));
 357 }
 358
 359 //______________________________________________________________________________
 360 void AliMUONTriggerGeometryBuilder::SetSensitiveVolumes()
 361 {
 362 // Defines the sensitive volumes for trigger station chambers.
 363 // ---
 364
 365   GetGeometry(10)->SetSensitiveVolume("S11G");
 366   GetGeometry(11)->SetSensitiveVolume("S12G");
 367   GetGeometry(12)->SetSensitiveVolume("S13G");
 368   GetGeometry(13)->SetSensitiveVolume("S14G");
 369 }
 370