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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  13  * provided "as is" without express or implied warranty.                  *
  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(16, 4),
  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 /// Destructor
  62 }
  63
  64 //
  65 // public methods
  66 //
  67
  68 //______________________________________________________________________________
  69 void AliMUONTriggerGeometryBuilder::CreateGeometry()
  70 {
  71 /// From AliMUONv1::CreateGeometry()
  72
  73     /*
  74        zpos1 and zpos2 are the middle of the first and second
  75        planes of station 1 (+1m for second station):
  76        zpos1=(zpos1m+zpos1p)/2=(15999+16071)/2=16035 mm, thick/2=40 mm
  77        zpos2=(zpos2m+zpos2p)/2=(16169+16241)/2=16205 mm, thick/2=40 mm
  78        zposxm and zposxp= middles of gaz gaps within a detection plane
  79        rem: the total thickness accounts for 1 mm of al on both
  80        side of the RPCs (see zpos1 and zpos2)
  81     */
  82
  83     Int_t *idtmed = fMUON->GetIdtmed()->GetArray()-1099;
  84     Int_t idAir= idtmed[1100]; // medium 1
  85     Int_t idAlu1=idtmed[1103]; // medium 4
  86     Int_t detElemId=0;          // Detection Element Number
  87     Float_t tpar[3];
  88     Double_t dpar[3];
  89
  90 // vertical gap between right and left chambers (kDXZERO*2=4cm)
  91     const Float_t kDXZERO=2.;
  92 // main distances for chamber definition in first plane/first station
  93     const Float_t kXMIN=34.;
  94     const Float_t kXMED=51.;
  95     const Float_t kXMAX=255.;
  96 // 090704 kXMAX changed from 272 to 255.
  97 // (see fig.2-4 & 2-5 of Local Trigger Board PRR)
  98 // segmentation updated accordingly
  99     const Float_t kYMIN=34.;
 100     const Float_t kYMAX=51.;
 101 // inner/outer radius of flange between beam shield. and chambers (1/station)
 102 //    const Float_t kRMIN[2]={50.,50.};
 103 //    const Float_t kRMAX[2]={64.,68.};
 104 // z position of the middle of the gas gap in mother vol
 105     const Float_t kZm=-3.6;
 106     const Float_t kZp=+3.6;
 107
 108     Float_t zpos1= AliMUONConstants::DefaultChamberZ(10);
 109     Double_t dstation =  ( ( - AliMUONConstants::DefaultChamberZ(11)) -
 110                            ( - AliMUONConstants::DefaultChamberZ(10)) ) /2.1;
 111     Float_t par[3];
 112     par[2] = dstation;
 113
 114 // ratio of zpos1m/zpos1p and inverse for first plane
 115     Float_t zmp=(zpos1-3.6)/(zpos1+3.6);
 116     Float_t zpm=1./zmp;
 117
 118     Int_t icount=0;  // chamber counter (0 1 2 3)
 119
 120     for (Int_t istation=0; istation<2; istation++) { // loop on stations
 121         for (Int_t iplane=0; iplane<2; iplane++) { // loop on detection planes
 122
 123             Int_t iVolNum=1; // counter Volume Number
 124             icount = Int_t(iplane<<0)+Int_t(istation<<1);
 125
 126             par[0] = AliMUONConstants::Rmin(5+istation);
 127             par[1] = AliMUONConstants::Rmax(5+istation);
 128             Char_t volName[6];
 129             sprintf(volName,"%s%d", "SC",11+icount);
 130             gMC->Gsvolu(volName,"TUBE", idAir, par, 3);
 131             //SetVolume(10+icount, volName);
 132 //          Float_t zpos =  AliMUONConstants::DefaultChamberZ(10+icount);
 133
 134 /* removed 03/18/05
 135 // Flange between beam shielding and RPC
 136             tpar[0]= kRMIN[istation];
 137             tpar[1]= kRMAX[istation];
 138             tpar[2]= 4.0;
 139             char volFlange[5];
 140             sprintf(volFlange,"SF%dA",icount+1);
 141             gMC->Gsvolu(volFlange,"TUBE",idAlu1,tpar,3);     // Al
 142             // changed by ivana
 143             //gMC->Gspos(volFlange,1,"ALIC",0.,0.,zpos,0,"MANY");
 144             iChamber->GetGeometry()->GetEnvelopeStore()
 145               ->AddEnvelope(volFlange, 0, false, "MANY");
 146 */
 147
 148 // scaling factor
 149 //          Float_t zRatio = zpos / zpos1;
 150             Float_t zRatio = AliMUONConstants::DefaultRatioTriggerChamber(icount);
 151
 152
 153
 154
 155 // envelopes (same size except line 5, all virtual)
 156             char volEnv[18][5];
 157             tpar[1] = kYMIN * zRatio;
 158             tpar[2] = 0.4;
 159             Int_t i=0;    // counter
 160             for (Int_t icolumn=0; icolumn<2; icolumn++) {
 161                 for (Int_t iline=1; iline<10; iline++){
 162                     tpar[0] = (kXMAX/2.) * zRatio;
 163                     if (iline==5) tpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
 164                     if (icolumn==0)
 165                         sprintf(volEnv[i],"S%dR%d",icount,iline);
 166                     else
 167                         sprintf(volEnv[i],"S%dL%d",icount,iline);
 168                     // gMC->Gsvolu(volEnv[i],"BOX",idAir,tpar,0);
 169                     i++;
 170                 }
 171             }
 172
 173 // chamber prototype
 174             tpar[0]= 0.;
 175             tpar[1]= 0.;
 176             tpar[2]= 0.;            char volAlu[5];     // Alu
 177             char volBak[5];     // Bakelite
 178             char volGaz[5];     // Gas streamer
 179             sprintf(volAlu,"SC%dA",icount+1);
 180             sprintf(volBak,"SB%dA",icount+1);
 181             sprintf(volGaz,"S%dG",icount+11);
 182             gMC->Gsvolu(volAlu,"BOX",idAlu1,tpar,0);         // Al
 183             gMC->Gsvolu(volBak,"BOX",idtmed[1107],tpar,0);   // Bakelite
 184             gMC->Gsvolu(volGaz,"BOX",idtmed[1106],tpar,0);   // Gas streamer
 185             tpar[0] = -1.;
 186             tpar[1] = -1.;
 187             tpar[2] = 0.1;
 188             gMC->Gsposp(volGaz,1,volBak,0.,0.,0.,0,"ONLY",tpar,3);
 189             tpar[2] = 0.3;
 190             gMC->Gsposp(volBak,1,volAlu,0.,0.,0.,0,"ONLY",tpar,3);
 191
 192 // chamber type A
 193             Float_t xEnv = (kDXZERO+kXMED+(kXMAX-kXMED)/2.)*zRatio;
 194             Float_t yEnvM = 0.;  // y low position of envelope in chamber
 195             Float_t yEnvP = 0.;  // y up position of envelope in chamber
 196             Float_t yEnvPsave = 0.; // tmp data
 197             Float_t yEnvMsave = 0.; // tmp data
 198             Float_t xpos = 0.; // x position of RPC in envelope
 199             Float_t ypos = 0.; // y position of RPC in envelope
 200             dpar[2] = 0.4;
 201             dpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
 202             dpar[1] = kYMIN * zRatio;
 203
 204             detElemId = (10+icount+1)*100;
 205             GetEnvelopes(16+icount)->AddEnvelope(volEnv[4], detElemId, true, TGeoTranslation(xEnv,yEnvP,kZp));
 206             detElemId = (10+icount+1)*100+9;
 207             GetEnvelopes(16+icount)->AddEnvelope(volEnv[13], detElemId, true, TGeoTranslation(-xEnv,yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 208
 209             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[4],iVolNum++,3, dpar);
 210             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[13],iVolNum++,3, dpar);
 211
 212 // chamber type B (plus envelope chambers B & C)
 213             xEnv = (kDXZERO+kXMAX/2.)*zRatio;
 214             yEnvPsave = yEnvP;
 215             yEnvMsave = yEnvM;
 216             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 217             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 218             dpar[0] = ((kXMAX-kXMIN)/2.) * zRatio;
 219             dpar[1] = ((kYMAX-kYMIN)/2.) * zRatio;
 220             xpos = kXMIN/2. * zRatio;
 221             ypos = (kYMIN - kYMIN/4.) * zRatio;
 222
 223             detElemId = (10+icount+1)*100+17;
 224             GetEnvelopes(16+icount)->AddEnvelope(volEnv[3], detElemId, true, TGeoTranslation( xEnv,-yEnvM,kZm));
 225             detElemId = (10+icount+1)*100+1;
 226             GetEnvelopes(16+icount)->AddEnvelope(volEnv[5], detElemId, true, TGeoTranslation( xEnv, yEnvM,kZm));
 227             detElemId = (10+icount+1)*100+10;
 228             GetEnvelopes(16+icount)->AddEnvelope(volEnv[12], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 229             detElemId = (10+icount+1)*100+8;
 230             GetEnvelopes(16+icount)->AddEnvelope(volEnv[14], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 231
 232             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 233             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 234             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 235             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 236
 237 // chamber type C (note: same Z than type B)
 238             dpar[0] = (kXMAX/2)*zRatio;
 239             dpar[1] = (kYMAX/2)*zRatio;
 240             xpos = 0.;
 241             ypos = ((kYMAX - kYMIN)/2.) * zRatio;
 242
 243             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 244             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 245             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 246             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 247
 248 // chamber type D, E and F (same size)
 249 // D
 250             yEnvPsave = yEnvP;
 251             yEnvMsave = yEnvM;
 252             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 253             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 254             dpar[0] = (kXMAX/2.)*zRatio;
 255             dpar[1] =  kYMIN*zRatio;
 256
 257             detElemId = (10+icount+1)*100+16;
 258             GetEnvelopes(16+icount)->AddEnvelope(volEnv[2], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
 259             detElemId = (10+icount+1)*100+2;
 260             GetEnvelopes(16+icount)->AddEnvelope(volEnv[6], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
 261             detElemId = (10+icount+1)*100+11;
 262             GetEnvelopes(16+icount)->AddEnvelope(volEnv[11], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 263             detElemId = (10+icount+1)*100+7;
 264             GetEnvelopes(16+icount)->AddEnvelope(volEnv[15], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 265
 266             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[2],iVolNum++,3, dpar);
 267             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[6],iVolNum++,3, dpar);
 268             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[11],iVolNum++,3, dpar);
 269             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[15],iVolNum++,3, dpar);
 270
 271 // E
 272             yEnvPsave = yEnvP;
 273             yEnvMsave = yEnvM;
 274             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 275             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 276
 277             detElemId = (10+icount+1)*100+15;
 278             GetEnvelopes(16+icount)->AddEnvelope(volEnv[1], detElemId, true, TGeoTranslation(xEnv,-yEnvM,kZm));
 279             detElemId = (10+icount+1)*100+3;
 280             GetEnvelopes(16+icount)->AddEnvelope(volEnv[7], detElemId, true, TGeoTranslation(xEnv, yEnvM,kZm));
 281             detElemId = (10+icount+1)*100+12;
 282             GetEnvelopes(16+icount)->AddEnvelope(volEnv[10], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 283             detElemId = (10+icount+1)*100+6;
 284             GetEnvelopes(16+icount)->AddEnvelope(volEnv[16], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 285
 286             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[1],iVolNum++,3,dpar);
 287             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[7],iVolNum++,3,dpar);
 288             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[10],iVolNum++,3,dpar);
 289             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[16],iVolNum++,3,dpar);
 290
 291
 292 // F
 293             yEnvPsave = yEnvP;
 294             yEnvMsave = yEnvM;
 295             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 296             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 297
 298             detElemId = (10+icount+1)*100+14;
 299             GetEnvelopes(16+icount)->AddEnvelope(volEnv[0], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
 300             detElemId = (10+icount+1)*100+4;
 301             GetEnvelopes(16+icount)->AddEnvelope(volEnv[8], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
 302             detElemId = (10+icount+1)*100+13;
 303             GetEnvelopes(16+icount)->AddEnvelope(volEnv[9], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 304             detElemId = (10+icount+1)*100+5;
 305             GetEnvelopes(16+icount)->AddEnvelope(volEnv[17], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 306
 307             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[0],iVolNum++,3,dpar);
 308             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[8],iVolNum++,3,dpar);
 309             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[9],iVolNum++,3,dpar);
 310             GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[17],iVolNum++,3,dpar);
 311
 312         } // end loop on detection planes
 313     } // end loop on stations
 314 }
 315
 316 //______________________________________________________________________________
 317 void AliMUONTriggerGeometryBuilder::SetTransformations()
 318 {
 319 /// Defines the transformations for the trigger chambers.
 320
 321     if (gAlice->GetModule("SHIL")) {
 322       SetMotherVolume(16, "YOUT2");
 323       SetMotherVolume(17, "YOUT2");
 324       SetMotherVolume(18, "YOUT2");
 325       SetMotherVolume(19, "YOUT2");
 326     }
 327
 328     SetVolume(16, "SC11");
 329     SetVolume(17, "SC12");
 330     SetVolume(18, "SC13");
 331     SetVolume(19, "SC14");
 332
 333     Double_t zpos1= AliMUONConstants::DefaultChamberZ(10);
 334     SetTranslation(16, TGeoTranslation(0., 0., zpos1));
 335
 336     zpos1= AliMUONConstants::DefaultChamberZ(11);
 337     SetTranslation(17, TGeoTranslation(0., 0., zpos1));
 338
 339     zpos1= AliMUONConstants::DefaultChamberZ(12);
 340     SetTranslation(18, TGeoTranslation(0., 0., zpos1));
 341
 342     zpos1= AliMUONConstants::DefaultChamberZ(13);
 343     SetTranslation(19, TGeoTranslation(0., 0., zpos1));
 344 }
 345
 346 //______________________________________________________________________________
 347 void AliMUONTriggerGeometryBuilder::SetSensitiveVolumes()
 348 {
 349 /// Defines the sensitive volumes for trigger station chambers.
 350
 351   GetGeometry(16)->SetSensitiveVolume("S11G");
 352   GetGeometry(17)->SetSensitiveVolume("S12G");
 353   GetGeometry(18)->SetSensitiveVolume("S13G");
 354   GetGeometry(19)->SetSensitiveVolume("S14G");
 355 }
 356