MUON/AliMUONTriggerGeometryBuilder.cxx

   1 /**************************************************************************
   2  * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
   3  *                                                                        *
   4  * Author: The ALICE Off-line Project.                                    *
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  14  **************************************************************************/
  15
  16 // $Id$
  17
  18 // -----------------------------------
  19 // Class AliMUONTriggerGeometryBuilder
  20 // -----------------------------------
  21 // MUON Trigger stations geometry
  22 // construction class.
  23 // Author: Philippe Crochet (LPCCFd)
  24
  25 #include <TVirtualMC.h>
  26 #include <TGeoMatrix.h>
  27
  28 #include "AliLog.h"
  29 #include "AliRun.h"
  30
  31 #include "AliMUONTriggerGeometryBuilder.h"
  32 #include "AliMUON.h"
  33 #include "AliMUONConstants.h"
  34 #include "AliMUONGeometryModule.h"
  35 #include "AliMUONGeometryEnvelopeStore.h"
  36
  37 /// \cond CLASSIMP
  38 ClassImp(AliMUONTriggerGeometryBuilder)
  39 /// \endcond
  40
  41 //______________________________________________________________________________
  42 AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder(AliMUON* muon)
  43  : AliMUONVGeometryBuilder(10, 11, 12, 13),
  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 AliMUONTriggerGeometryBuilder::~AliMUONTriggerGeometryBuilder() {
  60 //
  61 }
  62
  63 //
  64 // public methods
  65 //
  66
  67 //______________________________________________________________________________
  68 void AliMUONTriggerGeometryBuilder::CreateGeometry()
  69 {
  70 // From AliMUONv1::CreateGeometry()
  71
  72     /*
  73        zpos1 and zpos2 are the middle of the first and second
  74        planes of station 1 (+1m for second station):
  75        zpos1=(zpos1m+zpos1p)/2=(15999+16071)/2=16035 mm, thick/2=40 mm
  76        zpos2=(zpos2m+zpos2p)/2=(16169+16241)/2=16205 mm, thick/2=40 mm
  77        zposxm and zposxp= middles of gaz gaps within a detection plane
  78        rem: the total thickness accounts for 1 mm of al on both
  79        side of the RPCs (see zpos1 and zpos2)
  80     */
  81
  82     Int_t *idtmed = fMUON->GetIdtmed()->GetArray()-1099;
  83     Int_t idAir= idtmed[1100]; // medium 1
  84     Int_t idAlu1=idtmed[1103]; // medium 4
  85     Int_t detElemId=0;          // Detection Element Number
  86     Float_t tpar[3];
  87     Double_t dpar[3];
  88
  89 // vertical gap between right and left chambers (kDXZERO*2=4cm)
  90     const Float_t kDXZERO=2.;
  91 // main distances for chamber definition in first plane/first station
  92     const Float_t kXMIN=34.;
  93     const Float_t kXMED=51.;
  94     const Float_t kXMAX=255.;
  95 // 090704 kXMAX changed from 272 to 255.
  96 // (see fig.2-4 & 2-5 of Local Trigger Board PRR)
  97 // segmentation updated accordingly
  98     const Float_t kYMIN=34.;
  99     const Float_t kYMAX=51.;
 100 // inner/outer radius of flange between beam shield. and chambers (1/station)
 101 //    const Float_t kRMIN[2]={50.,50.};
 102 //    const Float_t kRMAX[2]={64.,68.};
 103 // z position of the middle of the gas gap in mother vol
 104     const Float_t kZm=-3.6;
 105     const Float_t kZp=+3.6;
 106
 107     Float_t zpos1= AliMUONConstants::DefaultChamberZ(10);
 108     Double_t dstation =  ( ( - AliMUONConstants::DefaultChamberZ(11)) -
 109                            ( - AliMUONConstants::DefaultChamberZ(10)) ) /2.1;
 110     Float_t par[3];
 111     par[2] = dstation;
 112
 113 // ratio of zpos1m/zpos1p and inverse for first plane
 114     Float_t zmp=(zpos1-3.6)/(zpos1+3.6);
 115     Float_t zpm=1./zmp;
 116
 117     Int_t icount=0;  // chamber counter (0 1 2 3)
 118
 119     for (Int_t istation=0; istation<2; istation++) { // loop on stations
 120         for (Int_t iplane=0; iplane<2; iplane++) { // loop on detection planes
 121
 122             Int_t iVolNum=1; // counter Volume Number
 123             icount = Int_t(iplane<<0)+Int_t(istation<<1);
 124
 125             par[0] = AliMUONConstants::Rmin(5+istation);
 126             par[1] = AliMUONConstants::Rmax(5+istation);
 127             Char_t volName[6];
 128             sprintf(volName,"%s%d", "SC",11+icount);
 129             gMC->Gsvolu(volName,"TUBE", idAir, par, 3);
 130             //SetVolume(10+icount, volName);
 131 //          Float_t zpos =  AliMUONConstants::DefaultChamberZ(10+icount);
 132
 133 /* removed 03/18/05
 134 // Flange between beam shielding and RPC
 135             tpar[0]= kRMIN[istation];
 136             tpar[1]= kRMAX[istation];
 137             tpar[2]= 4.0;
 138             char volFlange[5];
 139             sprintf(volFlange,"SF%dA",icount+1);
 140             gMC->Gsvolu(volFlange,"TUBE",idAlu1,tpar,3);     // Al
 141             // changed by ivana
 142             //gMC->Gspos(volFlange,1,"ALIC",0.,0.,zpos,0,"MANY");
 143             iChamber->GetGeometry()->GetEnvelopeStore()
 144               ->AddEnvelope(volFlange, 0, false, "MANY");
 145 */
 146
 147 // scaling factor
 148 //          Float_t zRatio = zpos / zpos1;
 149             Float_t zRatio = AliMUONConstants::DefaultRatioTriggerChamber(icount);
 150
 151
 152
 153
 154 // envelopes (same size except line 5, all virtual)
 155             char volEnv[18][5];
 156             tpar[1] = kYMIN * zRatio;
 157             tpar[2] = 0.4;
 158             Int_t i=0;    // counter
 159             for (Int_t icolumn=0; icolumn<2; icolumn++) {
 160                 for (Int_t iline=1; iline<10; iline++){
 161                     tpar[0] = (kXMAX/2.) * zRatio;
 162                     if (iline==5) tpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
 163                     if (icolumn==0)
 164                         sprintf(volEnv[i],"S%dR%d",icount,iline);
 165                     else
 166                         sprintf(volEnv[i],"S%dL%d",icount,iline);
 167                     // gMC->Gsvolu(volEnv[i],"BOX",idAir,tpar,0);
 168                     i++;
 169                 }
 170             }
 171
 172 // chamber prototype
 173             tpar[0]= 0.;
 174             tpar[1]= 0.;
 175             tpar[2]= 0.;            char volAlu[5];     // Alu
 176             char volBak[5];     // Bakelite
 177             char volGaz[5];     // Gas streamer
 178             sprintf(volAlu,"SC%dA",icount+1);
 179             sprintf(volBak,"SB%dA",icount+1);
 180             sprintf(volGaz,"S%dG",icount+11);
 181             gMC->Gsvolu(volAlu,"BOX",idAlu1,tpar,0);         // Al
 182             gMC->Gsvolu(volBak,"BOX",idtmed[1107],tpar,0);   // Bakelite
 183             gMC->Gsvolu(volGaz,"BOX",idtmed[1106],tpar,0);   // Gas streamer
 184             tpar[0] = -1.;
 185             tpar[1] = -1.;
 186             tpar[2] = 0.1;
 187             gMC->Gsposp(volGaz,1,volBak,0.,0.,0.,0,"ONLY",tpar,3);
 188             tpar[2] = 0.3;
 189             gMC->Gsposp(volBak,1,volAlu,0.,0.,0.,0,"ONLY",tpar,3);
 190
 191 // chamber type A
 192             Float_t xEnv = (kDXZERO+kXMED+(kXMAX-kXMED)/2.)*zRatio;
 193             Float_t yEnvM = 0.;  // y low position of envelope in chamber
 194             Float_t yEnvP = 0.;  // y up position of envelope in chamber
 195             Float_t yEnvPsave = 0.; // tmp data
 196             Float_t yEnvMsave = 0.; // tmp data
 197             Float_t xpos = 0.; // x position of RPC in envelope
 198             Float_t ypos = 0.; // y position of RPC in envelope
 199             dpar[2] = 0.4;
 200             dpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
 201             dpar[1] = kYMIN * zRatio;
 202
 203             detElemId = (10+icount+1)*100;
 204             GetEnvelopes(10+icount)->AddEnvelope(volEnv[4], detElemId, true, TGeoTranslation(xEnv,yEnvP,kZp));
 205             detElemId = (10+icount+1)*100+9;
 206             GetEnvelopes(10+icount)->AddEnvelope(volEnv[13], detElemId, true, TGeoTranslation(-xEnv,yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 207
 208             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[4],iVolNum++,3, dpar);
 209             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[13],iVolNum++,3, dpar);
 210
 211 // chamber type B (plus envelope chambers B & C)
 212             xEnv = (kDXZERO+kXMAX/2.)*zRatio;
 213             yEnvPsave = yEnvP;
 214             yEnvMsave = yEnvM;
 215             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 216             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 217             dpar[0] = ((kXMAX-kXMIN)/2.) * zRatio;
 218             dpar[1] = ((kYMAX-kYMIN)/2.) * zRatio;
 219             xpos = kXMIN/2. * zRatio;
 220             ypos = (kYMIN - kYMIN/4.) * zRatio;
 221
 222             detElemId = (10+icount+1)*100+17;
 223             GetEnvelopes(10+icount)->AddEnvelope(volEnv[3], detElemId, true, TGeoTranslation( xEnv,-yEnvM,kZm));
 224             detElemId = (10+icount+1)*100+1;
 225             GetEnvelopes(10+icount)->AddEnvelope(volEnv[5], detElemId, true, TGeoTranslation( xEnv, yEnvM,kZm));
 226             detElemId = (10+icount+1)*100+10;
 227             GetEnvelopes(10+icount)->AddEnvelope(volEnv[12], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 228             detElemId = (10+icount+1)*100+8;
 229             GetEnvelopes(10+icount)->AddEnvelope(volEnv[14], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 230
 231             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 232             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 233             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 234             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 235
 236 // chamber type C (note: same Z than type B)
 237             dpar[0] = (kXMAX/2)*zRatio;
 238             dpar[1] = (kYMAX/2)*zRatio;
 239             xpos = 0.;
 240             ypos = ((kYMAX - kYMIN)/2.) * zRatio;
 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 D, E and F (same size)
 248 // D
 249             yEnvPsave = yEnvP;
 250             yEnvMsave = yEnvM;
 251             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 252             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 253             dpar[0] = (kXMAX/2.)*zRatio;
 254             dpar[1] =  kYMIN*zRatio;
 255
 256             detElemId = (10+icount+1)*100+16;
 257             GetEnvelopes(10+icount)->AddEnvelope(volEnv[2], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
 258             detElemId = (10+icount+1)*100+2;
 259             GetEnvelopes(10+icount)->AddEnvelope(volEnv[6], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
 260             detElemId = (10+icount+1)*100+11;
 261             GetEnvelopes(10+icount)->AddEnvelope(volEnv[11], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 262             detElemId = (10+icount+1)*100+7;
 263             GetEnvelopes(10+icount)->AddEnvelope(volEnv[15], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 264
 265             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[2],iVolNum++,3, dpar);
 266             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[6],iVolNum++,3, dpar);
 267             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[11],iVolNum++,3, dpar);
 268             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[15],iVolNum++,3, dpar);
 269
 270 // E
 271             yEnvPsave = yEnvP;
 272             yEnvMsave = yEnvM;
 273             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 274             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 275
 276             detElemId = (10+icount+1)*100+15;
 277             GetEnvelopes(10+icount)->AddEnvelope(volEnv[1], detElemId, true, TGeoTranslation(xEnv,-yEnvM,kZm));
 278             detElemId = (10+icount+1)*100+3;
 279             GetEnvelopes(10+icount)->AddEnvelope(volEnv[7], detElemId, true, TGeoTranslation(xEnv, yEnvM,kZm));
 280             detElemId = (10+icount+1)*100+12;
 281             GetEnvelopes(10+icount)->AddEnvelope(volEnv[10], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 282             detElemId = (10+icount+1)*100+6;
 283             GetEnvelopes(10+icount)->AddEnvelope(volEnv[16], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 284
 285             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[1],iVolNum++,3,dpar);
 286             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[7],iVolNum++,3,dpar);
 287             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[10],iVolNum++,3,dpar);
 288             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[16],iVolNum++,3,dpar);
 289
 290
 291 // F
 292             yEnvPsave = yEnvP;
 293             yEnvMsave = yEnvM;
 294             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 295             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 296
 297             detElemId = (10+icount+1)*100+14;
 298             GetEnvelopes(10+icount)->AddEnvelope(volEnv[0], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
 299             detElemId = (10+icount+1)*100+4;
 300             GetEnvelopes(10+icount)->AddEnvelope(volEnv[8], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
 301             detElemId = (10+icount+1)*100+13;
 302             GetEnvelopes(10+icount)->AddEnvelope(volEnv[9], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 303             detElemId = (10+icount+1)*100+5;
 304             GetEnvelopes(10+icount)->AddEnvelope(volEnv[17], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 305
 306             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[0],iVolNum++,3,dpar);
 307             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[8],iVolNum++,3,dpar);
 308             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[9],iVolNum++,3,dpar);
 309             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[17],iVolNum++,3,dpar);
 310
 311         } // end loop on detection planes
 312     } // end loop on stations
 313 }
 314
 315 //______________________________________________________________________________
 316 void AliMUONTriggerGeometryBuilder::SetTransformations()
 317 {
 318 // Defines the transformations for the trigger chambers.
 319 // ---
 320
 321     if (gAlice->GetModule("SHIL")) {
 322       SetMotherVolume(10, "YOUT2");
 323       SetMotherVolume(11, "YOUT2");
 324       SetMotherVolume(12, "YOUT2");
 325       SetMotherVolume(13, "YOUT2");
 326     }
 327
 328     SetVolume(10, "SC11");
 329     SetVolume(11, "SC12");
 330     SetVolume(12, "SC13");
 331     SetVolume(13, "SC14");
 332
 333     Double_t zpos1= AliMUONConstants::DefaultChamberZ(10);
 334     SetTranslation(10, TGeoTranslation(0., 0., zpos1));
 335
 336     zpos1= AliMUONConstants::DefaultChamberZ(11);
 337     SetTranslation(11, TGeoTranslation(0., 0., zpos1));
 338
 339     zpos1= AliMUONConstants::DefaultChamberZ(12);
 340     SetTranslation(12, TGeoTranslation(0., 0., zpos1));
 341
 342     zpos1= AliMUONConstants::DefaultChamberZ(13);
 343     SetTranslation(13, TGeoTranslation(0., 0., zpos1));
 344 }
 345
 346 //______________________________________________________________________________
 347 void AliMUONTriggerGeometryBuilder::SetSensitiveVolumes()
 348 {
 349 // Defines the sensitive volumes for trigger station chambers.
 350 // ---
 351
 352   GetGeometry(10)->SetSensitiveVolume("S11G");
 353   GetGeometry(11)->SetSensitiveVolume("S12G");
 354   GetGeometry(12)->SetSensitiveVolume("S13G");
 355   GetGeometry(13)->SetSensitiveVolume("S14G");
 356 }
 357