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 // -----------------------------------
  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
  30 #include "AliMUONTriggerGeometryBuilder.h"
  31 #include "AliMUON.h"
  32 #include "AliMUONConstants.h"
  33 #include "AliMUONGeometryModule.h"
  34 #include "AliMUONGeometryEnvelopeStore.h"
  35
  36 ClassImp(AliMUONTriggerGeometryBuilder)
  37
  38 //______________________________________________________________________________
  39 AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder(AliMUON* muon)
  40  : AliMUONVGeometryBuilder(10, 11, 12, 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     Float_t zpos1= AliMUONConstants::DefaultChamberZ(10);
 129     Double_t dstation =  ( ( - AliMUONConstants::DefaultChamberZ(11)) -
 130                            ( - AliMUONConstants::DefaultChamberZ(10)) ) /2.1;
 131     Float_t par[3];
 132     par[2] = dstation;
 133
 134 // ratio of zpos1m/zpos1p and inverse for first plane
 135     Float_t zmp=(zpos1-3.6)/(zpos1+3.6);
 136     Float_t zpm=1./zmp;
 137
 138     Int_t icount=0;  // chamber counter (0 1 2 3)
 139
 140     for (Int_t istation=0; istation<2; istation++) { // loop on stations
 141         for (Int_t iplane=0; iplane<2; iplane++) { // loop on detection planes
 142
 143             Int_t iVolNum=1; // counter Volume Number
 144             icount = Int_t(iplane<<0)+Int_t(istation<<1);
 145
 146             par[0] = AliMUONConstants::Rmin(5+istation);
 147             par[1] = AliMUONConstants::Rmax(5+istation);
 148             Char_t volName[6];
 149             sprintf(volName,"%s%d", "SC",11+icount);
 150             gMC->Gsvolu(volName,"TUBE", idAir, par, 3);
 151             //SetVolume(10+icount, volName);
 152 //          Float_t zpos =  AliMUONConstants::DefaultChamberZ(10+icount);
 153
 154 /* removed 03/18/05
 155 // Flange between beam shielding and RPC
 156             tpar[0]= kRMIN[istation];
 157             tpar[1]= kRMAX[istation];
 158             tpar[2]= 4.0;
 159             char volFlange[5];
 160             sprintf(volFlange,"SF%dA",icount+1);
 161             gMC->Gsvolu(volFlange,"TUBE",idAlu1,tpar,3);     // Al
 162             // changed by ivana
 163             //gMC->Gspos(volFlange,1,"ALIC",0.,0.,zpos,0,"MANY");
 164             iChamber->GetGeometry()->GetEnvelopeStore()
 165               ->AddEnvelope(volFlange, 0, false, "MANY");
 166 */
 167
 168 // scaling factor
 169 //          Float_t zRatio = zpos / zpos1;
 170             Float_t zRatio = AliMUONConstants::DefaultRatioTriggerChamber(icount);
 171
 172
 173
 174
 175 // envelopes (same size except line 5, all virtual)
 176             char volEnv[18][5];
 177             tpar[1] = kYMIN * zRatio;
 178             tpar[2] = 0.4;
 179             Int_t i=0;    // counter
 180             for (Int_t icolumn=0; icolumn<2; icolumn++) {
 181                 for (Int_t iline=1; iline<10; iline++){
 182                     tpar[0] = (kXMAX/2.) * zRatio;
 183                     if (iline==5) tpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
 184                     if (icolumn==0)
 185                         sprintf(volEnv[i],"S%dR%d",icount,iline);
 186                     else
 187                         sprintf(volEnv[i],"S%dL%d",icount,iline);
 188                     // gMC->Gsvolu(volEnv[i],"BOX",idAir,tpar,0);
 189                     i++;
 190                 }
 191             }
 192
 193 // chamber prototype
 194             tpar[0]= 0.;
 195             tpar[1]= 0.;
 196             tpar[2]= 0.;            char volAlu[5];     // Alu
 197             char volBak[5];     // Bakelite
 198             char volGaz[5];     // Gas streamer
 199             sprintf(volAlu,"SC%dA",icount+1);
 200             sprintf(volBak,"SB%dA",icount+1);
 201             sprintf(volGaz,"S%dG",icount+11);
 202             gMC->Gsvolu(volAlu,"BOX",idAlu1,tpar,0);         // Al
 203             gMC->Gsvolu(volBak,"BOX",idtmed[1107],tpar,0);   // Bakelite
 204             gMC->Gsvolu(volGaz,"BOX",idtmed[1106],tpar,0);   // Gas streamer
 205             tpar[0] = -1.;
 206             tpar[1] = -1.;
 207             tpar[2] = 0.1;
 208             gMC->Gsposp(volGaz,1,volBak,0.,0.,0.,0,"ONLY",tpar,3);
 209             tpar[2] = 0.3;
 210             gMC->Gsposp(volBak,1,volAlu,0.,0.,0.,0,"ONLY",tpar,3);
 211
 212 // chamber type A
 213             Float_t xEnv = (kDXZERO+kXMED+(kXMAX-kXMED)/2.)*zRatio;
 214             Float_t yEnvM = 0.;  // y low position of envelope in chamber
 215             Float_t yEnvP = 0.;  // y up position of envelope in chamber
 216             Float_t yEnvPsave = 0.; // tmp data
 217             Float_t yEnvMsave = 0.; // tmp data
 218             Float_t xpos = 0.; // x position of RPC in envelope
 219             Float_t ypos = 0.; // y position of RPC in envelope
 220             dpar[2] = 0.4;
 221             dpar[0] = ((kXMAX-kXMED)/2.)*zRatio;
 222             dpar[1] = kYMIN * zRatio;
 223
 224             detElemId = (10+icount+1)*100;
 225             GetEnvelopes(10+icount)->AddEnvelope(volEnv[4], detElemId, true, TGeoTranslation(xEnv,yEnvP,kZp));
 226             detElemId = (10+icount+1)*100+9;
 227             GetEnvelopes(10+icount)->AddEnvelope(volEnv[13], detElemId, true, TGeoTranslation(-xEnv,yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 228
 229             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[4],iVolNum++,3, dpar);
 230             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[13],iVolNum++,3, dpar);
 231
 232 // chamber type B (plus envelope chambers B & C)
 233             xEnv = (kDXZERO+kXMAX/2.)*zRatio;
 234             yEnvPsave = yEnvP;
 235             yEnvMsave = yEnvM;
 236             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 237             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 238             dpar[0] = ((kXMAX-kXMIN)/2.) * zRatio;
 239             dpar[1] = ((kYMAX-kYMIN)/2.) * zRatio;
 240             xpos = kXMIN/2. * zRatio;
 241             ypos = (kYMIN - kYMIN/4.) * zRatio;
 242
 243             detElemId = (10+icount+1)*100+17;
 244             GetEnvelopes(10+icount)->AddEnvelope(volEnv[3], detElemId, true, TGeoTranslation( xEnv,-yEnvM,kZm));
 245             detElemId = (10+icount+1)*100+1;
 246             GetEnvelopes(10+icount)->AddEnvelope(volEnv[5], detElemId, true, TGeoTranslation( xEnv, yEnvM,kZm));
 247             detElemId = (10+icount+1)*100+10;
 248             GetEnvelopes(10+icount)->AddEnvelope(volEnv[12], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 249             detElemId = (10+icount+1)*100+8;
 250             GetEnvelopes(10+icount)->AddEnvelope(volEnv[14], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 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 C (note: same Z than type B)
 258             dpar[0] = (kXMAX/2)*zRatio;
 259             dpar[1] = (kYMAX/2)*zRatio;
 260             xpos = 0.;
 261             ypos = ((kYMAX - kYMIN)/2.) * zRatio;
 262
 263             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 264             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 265             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 266             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 267
 268 // chamber type D, E and F (same size)
 269 // D
 270             yEnvPsave = yEnvP;
 271             yEnvMsave = yEnvM;
 272             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 273             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 274             dpar[0] = (kXMAX/2.)*zRatio;
 275             dpar[1] =  kYMIN*zRatio;
 276
 277             detElemId = (10+icount+1)*100+16;
 278             GetEnvelopes(10+icount)->AddEnvelope(volEnv[2], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
 279             detElemId = (10+icount+1)*100+2;
 280             GetEnvelopes(10+icount)->AddEnvelope(volEnv[6], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
 281             detElemId = (10+icount+1)*100+11;
 282             GetEnvelopes(10+icount)->AddEnvelope(volEnv[11], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 283             detElemId = (10+icount+1)*100+7;
 284             GetEnvelopes(10+icount)->AddEnvelope(volEnv[15], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 285
 286             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[2],iVolNum++,3, dpar);
 287             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[6],iVolNum++,3, dpar);
 288             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[11],iVolNum++,3, dpar);
 289             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[15],iVolNum++,3, dpar);
 290
 291 // E
 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+15;
 298             GetEnvelopes(10+icount)->AddEnvelope(volEnv[1], detElemId, true, TGeoTranslation(xEnv,-yEnvM,kZm));
 299             detElemId = (10+icount+1)*100+3;
 300             GetEnvelopes(10+icount)->AddEnvelope(volEnv[7], detElemId, true, TGeoTranslation(xEnv, yEnvM,kZm));
 301             detElemId = (10+icount+1)*100+12;
 302             GetEnvelopes(10+icount)->AddEnvelope(volEnv[10], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 303             detElemId = (10+icount+1)*100+6;
 304             GetEnvelopes(10+icount)->AddEnvelope(volEnv[16], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 305
 306             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[1],iVolNum++,3,dpar);
 307             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[7],iVolNum++,3,dpar);
 308             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[10],iVolNum++,3,dpar);
 309             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[16],iVolNum++,3,dpar);
 310
 311
 312 // F
 313             yEnvPsave = yEnvP;
 314             yEnvMsave = yEnvM;
 315             yEnvP = (yEnvMsave + kYMIN * zRatio ) * zpm + kYMIN * zRatio;
 316             yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 317
 318             detElemId = (10+icount+1)*100+14;
 319             GetEnvelopes(10+icount)->AddEnvelope(volEnv[0], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
 320             detElemId = (10+icount+1)*100+4;
 321             GetEnvelopes(10+icount)->AddEnvelope(volEnv[8], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
 322             detElemId = (10+icount+1)*100+13;
 323             GetEnvelopes(10+icount)->AddEnvelope(volEnv[9], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 324             detElemId = (10+icount+1)*100+5;
 325             GetEnvelopes(10+icount)->AddEnvelope(volEnv[17], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 326
 327             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[0],iVolNum++,3,dpar);
 328             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[8],iVolNum++,3,dpar);
 329             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[9],iVolNum++,3,dpar);
 330             GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[17],iVolNum++,3,dpar);
 331
 332         } // end loop on detection planes
 333     } // end loop on stations
 334 }
 335
 336 //______________________________________________________________________________
 337 void AliMUONTriggerGeometryBuilder::SetTransformations()
 338 {
 339 // Defines the transformations for the trigger chambers.
 340 // ---
 341
 342     SetVolume(10, "SC11");
 343     SetVolume(11, "SC12");
 344     SetVolume(12, "SC13");
 345     SetVolume(13, "SC14");
 346
 347     Double_t zpos1= AliMUONConstants::DefaultChamberZ(10);
 348     SetTranslation(10, TGeoTranslation(0., 0., zpos1));
 349
 350     zpos1= AliMUONConstants::DefaultChamberZ(11);
 351     SetTranslation(11, TGeoTranslation(0., 0., zpos1));
 352
 353     zpos1= AliMUONConstants::DefaultChamberZ(12);
 354     SetTranslation(12, TGeoTranslation(0., 0., zpos1));
 355
 356     zpos1= AliMUONConstants::DefaultChamberZ(13);
 357     SetTranslation(13, TGeoTranslation(0., 0., zpos1));
 358 }
 359
 360 //______________________________________________________________________________
 361 void AliMUONTriggerGeometryBuilder::SetSensitiveVolumes()
 362 {
 363 // Defines the sensitive volumes for trigger station chambers.
 364 // ---
 365
 366   GetGeometry(10)->SetSensitiveVolume("S11G");
 367   GetGeometry(11)->SetSensitiveVolume("S12G");
 368   GetGeometry(12)->SetSensitiveVolume("S13G");
 369   GetGeometry(13)->SetSensitiveVolume("S14G");
 370 }
 371