]> git.uio.no Git - u/mrichter/AliRoot.git/blobdiff - MUON/AliMUONTriggerGeometryBuilder.cxx
Updated list of MUON libraries
[u/mrichter/AliRoot.git] / MUON / AliMUONTriggerGeometryBuilder.cxx
index c8a6146af9f7dddefc2b1ec62d2b771b483595b2..1d85c7517bf1d589422a6d3faf22b7c0af8c28dc 100644 (file)
  **************************************************************************/
 
 // $Id$
-//
+
+// -----------------------------------
 // Class AliMUONTriggerGeometryBuilder
 // -----------------------------------
-// MUON Trigger stations geometry construction class.
-//
-// Author: Philippe Crochette, LPC Clermont-Ferrand
+// MUON Trigger stations geometry 
+// construction class.
+// Author: Philippe Crochet (LPCCFd)
 
 #include <TVirtualMC.h>
 #include <TGeoMatrix.h>
 
 #include "AliLog.h"
+#include "AliRun.h"
 
 #include "AliMUONTriggerGeometryBuilder.h"
 #include "AliMUON.h"
-#include "AliMUONChamber.h"
+#include "AliMUONConstants.h"
 #include "AliMUONGeometryModule.h"
 #include "AliMUONGeometryEnvelopeStore.h"
 
+/// \cond CLASSIMP
 ClassImp(AliMUONTriggerGeometryBuilder)
+/// \endcond
 
 //______________________________________________________________________________
 AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder(AliMUON* muon)
- : AliMUONVGeometryBuilder("trigger.dat",
-                           muon->Chamber(10).GetGeometry(), 
-                          muon->Chamber(11).GetGeometry(),
-                           muon->Chamber(12).GetGeometry(),
-                          muon->Chamber(13).GetGeometry()),
+ : AliMUONVGeometryBuilder(16, 4),
    fMUON(muon)
 {
-// Standard constructor
+/// Standard constructor
 
 }
 
@@ -52,36 +52,13 @@ AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder()
  : AliMUONVGeometryBuilder(),
    fMUON(0)
 {
-// Default constructor
-}
-
-
-//______________________________________________________________________________
-AliMUONTriggerGeometryBuilder::AliMUONTriggerGeometryBuilder(const AliMUONTriggerGeometryBuilder& rhs)
-  : AliMUONVGeometryBuilder(rhs)
-{
-// Protected copy constructor
-
-  AliFatal("Copy constructor is not implemented.");
-}
-
-//______________________________________________________________________________
-AliMUONTriggerGeometryBuilder::~AliMUONTriggerGeometryBuilder() {
-//
+/// Default constructor
 }
 
 //______________________________________________________________________________
-AliMUONTriggerGeometryBuilder& 
-AliMUONTriggerGeometryBuilder::operator = (const AliMUONTriggerGeometryBuilder& rhs) 
+AliMUONTriggerGeometryBuilder::~AliMUONTriggerGeometryBuilder() 
 {
-// Protected assignement operator
-
-  // check assignement to self
-  if (this == &rhs) return *this;
-
-  AliFatal("Assignment operator is not implemented.");
-    
-  return *this;  
+/// Destructor
 }
 
 //
@@ -91,7 +68,7 @@ AliMUONTriggerGeometryBuilder::operator = (const AliMUONTriggerGeometryBuilder&
 //______________________________________________________________________________
 void AliMUONTriggerGeometryBuilder::CreateGeometry()
 {
-// From AliMUONv1::CreateGeometry()
+/// From AliMUONv1::CreateGeometry()
 
     /* 
        zpos1 and zpos2 are the middle of the first and second
@@ -128,12 +105,9 @@ void AliMUONTriggerGeometryBuilder::CreateGeometry()
     const Float_t kZm=-3.6;
     const Float_t kZp=+3.6;
     
-    AliMUONChamber *iChamber, *iChamber1, *iChamber2;
-    iChamber1 = &fMUON->Chamber(10);
-    Float_t zpos1= iChamber1->Z(); 
-    iChamber2 = &fMUON->Chamber(11);
-
-    Double_t dstation =  ( ( - iChamber2->Z()) - ( - iChamber1->Z()) ) /2.1;
+    Float_t zpos1= AliMUONConstants::DefaultChamberZ(10); 
+    Double_t dstation =  ( ( - AliMUONConstants::DefaultChamberZ(11)) - 
+                           ( - AliMUONConstants::DefaultChamberZ(10)) ) /2.1;
     Float_t par[3];
     par[2] = dstation;
 
@@ -149,15 +123,14 @@ void AliMUONTriggerGeometryBuilder::CreateGeometry()
            Int_t iVolNum=1; // counter Volume Number
            icount = Int_t(iplane<<0)+Int_t(istation<<1);
            
-           iChamber = &fMUON->Chamber(10+icount);
-           par[0] = iChamber->RInner(); 
-           par[1] = iChamber->ROuter();
+           par[0] = AliMUONConstants::Rmin(5+istation); 
+           par[1] = AliMUONConstants::Rmax(5+istation);
            Char_t volName[6];
-           sprintf(volName,"%s%d", "CH",11+icount);
+           sprintf(volName,"%s%d", "SC",11+icount);
            gMC->Gsvolu(volName,"TUBE", idAir, par, 3);
-           iChamber->GetGeometry()->SetVolume(volName);
-           Float_t zpos =  iChamber->Z();           
-           
+           //SetVolume(10+icount, volName);
+//         Float_t zpos =  AliMUONConstants::DefaultChamberZ(10+icount);
+
 /* removed 03/18/05
 // Flange between beam shielding and RPC 
            tpar[0]= kRMIN[istation];
@@ -173,8 +146,12 @@ void AliMUONTriggerGeometryBuilder::CreateGeometry()
 */
            
 // scaling factor
-           Float_t zRatio = zpos / zpos1;
-           
+//         Float_t zRatio = zpos / zpos1;
+           Float_t zRatio = AliMUONConstants::DefaultRatioTriggerChamber(icount);                  
+
+
+
+    
 // envelopes (same size except line 5, all virtual)
            char volEnv[18][5];
            tpar[1] = kYMIN * zRatio; 
@@ -188,7 +165,7 @@ void AliMUONTriggerGeometryBuilder::CreateGeometry()
                        sprintf(volEnv[i],"S%dR%d",icount,iline);
                    else
                        sprintf(volEnv[i],"S%dL%d",icount,iline);
-                   gMC->Gsvolu(volEnv[i],"BOX",idAir,tpar,0); 
+                   // gMC->Gsvolu(volEnv[i],"BOX",idAir,tpar,0); 
                    i++;
                }
            }
@@ -225,12 +202,12 @@ void AliMUONTriggerGeometryBuilder::CreateGeometry()
            dpar[1] = kYMIN * zRatio;
 
            detElemId = (10+icount+1)*100;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[4], detElemId, true, TGeoTranslation(xEnv,yEnvP,kZp));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[4], detElemId, true, TGeoTranslation(xEnv,yEnvP,kZp));
            detElemId = (10+icount+1)*100+9;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[13], detElemId, true, TGeoTranslation(-xEnv,yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[13], detElemId, true, TGeoTranslation(-xEnv,yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[4],iVolNum++,3, dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[13],iVolNum++,3, dpar);      
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[4],iVolNum++,3, dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[13],iVolNum++,3, dpar);      
 
 // chamber type B (plus envelope chambers B & C)   
            xEnv = (kDXZERO+kXMAX/2.)*zRatio;
@@ -244,18 +221,18 @@ void AliMUONTriggerGeometryBuilder::CreateGeometry()
            ypos = (kYMIN - kYMIN/4.) * zRatio;
 
            detElemId = (10+icount+1)*100+17;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[3], detElemId, true, TGeoTranslation( xEnv,-yEnvM,kZm));            
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[3], detElemId, true, TGeoTranslation( xEnv,-yEnvM,kZm));            
            detElemId = (10+icount+1)*100+1;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[5], detElemId, true, TGeoTranslation( xEnv, yEnvM,kZm));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[5], detElemId, true, TGeoTranslation( xEnv, yEnvM,kZm));
            detElemId = (10+icount+1)*100+10;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[12], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[12], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
            detElemId = (10+icount+1)*100+8;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[14], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[14], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
 
 // chamber type C (note: same Z than type B)
            dpar[0] = (kXMAX/2)*zRatio;
@@ -263,10 +240,10 @@ void AliMUONTriggerGeometryBuilder::CreateGeometry()
            xpos = 0.;      
            ypos = ((kYMAX - kYMIN)/2.) * zRatio;
 
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[3],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[5],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[12],iVolNum++,TGeoTranslation(xpos,-ypos,0.),3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[14],iVolNum++,TGeoTranslation(xpos, ypos,0.),3,dpar);
 
 // chamber type D, E and F (same size)
 // D       
@@ -278,18 +255,18 @@ void AliMUONTriggerGeometryBuilder::CreateGeometry()
            dpar[1] =  kYMIN*zRatio;
 
            detElemId = (10+icount+1)*100+16;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[2], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[2], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
            detElemId = (10+icount+1)*100+2;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[6], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[6], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
            detElemId = (10+icount+1)*100+11;
-            GetEnvelopes(10+icount)->AddEnvelope(volEnv[11], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
+            GetEnvelopes(16+icount)->AddEnvelope(volEnv[11], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
            detElemId = (10+icount+1)*100+7;
-            GetEnvelopes(10+icount)->AddEnvelope(volEnv[15], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
+            GetEnvelopes(16+icount)->AddEnvelope(volEnv[15], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[2],iVolNum++,3, dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[6],iVolNum++,3, dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[11],iVolNum++,3, dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[15],iVolNum++,3, dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[2],iVolNum++,3, dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[6],iVolNum++,3, dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[11],iVolNum++,3, dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[15],iVolNum++,3, dpar);
 
 // E
            yEnvPsave = yEnvP;
@@ -298,18 +275,18 @@ void AliMUONTriggerGeometryBuilder::CreateGeometry()
            yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 
            detElemId = (10+icount+1)*100+15;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[1], detElemId, true, TGeoTranslation(xEnv,-yEnvM,kZm));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[1], detElemId, true, TGeoTranslation(xEnv,-yEnvM,kZm));
            detElemId = (10+icount+1)*100+3;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[7], detElemId, true, TGeoTranslation(xEnv, yEnvM,kZm));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[7], detElemId, true, TGeoTranslation(xEnv, yEnvM,kZm));
            detElemId = (10+icount+1)*100+12;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[10], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[10], detElemId, true, TGeoTranslation(-xEnv,-yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
            detElemId = (10+icount+1)*100+6;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[16], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[16], detElemId, true, TGeoTranslation(-xEnv, yEnvP,kZp),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
 
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[1],iVolNum++,3,dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[7],iVolNum++,3,dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[10],iVolNum++,3,dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[16],iVolNum++,3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[1],iVolNum++,3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[7],iVolNum++,3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[10],iVolNum++,3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[16],iVolNum++,3,dpar);
 
 
 // F
@@ -319,18 +296,18 @@ void AliMUONTriggerGeometryBuilder::CreateGeometry()
            yEnvM = (yEnvPsave + kYMIN * zRatio ) * zmp + kYMIN * zRatio;
 
            detElemId = (10+icount+1)*100+14;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[0], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[0], detElemId, true, TGeoTranslation(xEnv,-yEnvP,kZp));
            detElemId = (10+icount+1)*100+4;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[8], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[8], detElemId, true, TGeoTranslation(xEnv, yEnvP,kZp));
            detElemId = (10+icount+1)*100+13;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[9], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[9], detElemId, true, TGeoTranslation(-xEnv,-yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
            detElemId = (10+icount+1)*100+5;
-           GetEnvelopes(10+icount)->AddEnvelope(volEnv[17], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
+           GetEnvelopes(16+icount)->AddEnvelope(volEnv[17], detElemId, true, TGeoTranslation(-xEnv, yEnvM,kZm),TGeoRotation("rot1",90.,180.,90.,90.,180.,0.));
            
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[0],iVolNum++,3,dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[8],iVolNum++,3,dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[9],iVolNum++,3,dpar);
-           GetEnvelopes(10+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[17],iVolNum++,3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[0],iVolNum++,3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[8],iVolNum++,3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[9],iVolNum++,3,dpar);
+           GetEnvelopes(16+icount)->AddEnvelopeConstituentParam(volAlu,volEnv[17],iVolNum++,3,dpar);
 
        } // end loop on detection planes
     } // end loop on stations    
@@ -339,42 +316,41 @@ void AliMUONTriggerGeometryBuilder::CreateGeometry()
 //______________________________________________________________________________
 void AliMUONTriggerGeometryBuilder::SetTransformations() 
 {
-// Defines the transformations for the trigger chambers.
-// ---
-    Double_t zpos1, zpos2;    
-    AliMUONChamber *iChamber1, *iChamber2;
-
-    iChamber1 = &fMUON->Chamber(10);
-    zpos1= iChamber1->Z(); 
-    iChamber1->GetGeometry()
-       ->SetTranslation(TGeoTranslation(0., 0., zpos1));
+/// Defines the transformations for the trigger chambers.
+
+    if (gAlice->GetModule("SHIL")) {
+      SetMotherVolume(16, "YOUT2");
+      SetMotherVolume(17, "YOUT2");
+      SetMotherVolume(18, "YOUT2");
+      SetMotherVolume(19, "YOUT2");
+    }  
+
+    SetVolume(16, "SC11");
+    SetVolume(17, "SC12");
+    SetVolume(18, "SC13");
+    SetVolume(19, "SC14");
+
+    Double_t zpos1= AliMUONConstants::DefaultChamberZ(10); 
+    SetTranslation(16, TGeoTranslation(0., 0., zpos1));
     
-    iChamber2 = &fMUON->Chamber(11);
-    zpos2 = iChamber2->Z(); 
-    iChamber2->GetGeometry()
-       ->SetTranslation(TGeoTranslation(0., 0., zpos2));
-
-    iChamber1 = &fMUON->Chamber(12);
-    zpos1 = iChamber1->Z(); 
-    iChamber1->GetGeometry()
-       ->SetTranslation(TGeoTranslation(0., 0., zpos1));
+    zpos1= AliMUONConstants::DefaultChamberZ(11); 
+    SetTranslation(17, TGeoTranslation(0., 0., zpos1));
 
-    iChamber2 = &fMUON->Chamber(13);
-    zpos2 = iChamber2->Z(); 
-    iChamber2->GetGeometry()
-       ->SetTranslation(TGeoTranslation(0., 0., zpos2));
+    zpos1= AliMUONConstants::DefaultChamberZ(12); 
+    SetTranslation(18, TGeoTranslation(0., 0., zpos1));
 
+    zpos1= AliMUONConstants::DefaultChamberZ(13); 
+    SetTranslation(19, TGeoTranslation(0., 0., zpos1));
 }
 
 //______________________________________________________________________________
 void AliMUONTriggerGeometryBuilder::SetSensitiveVolumes()
 {
-// Defines the sensitive volumes for trigger station chambers.
-// ---
+/// Defines the sensitive volumes for trigger station chambers.
 
-  GetGeometry(10)->SetSensitiveVolume("S11G");
-  GetGeometry(11)->SetSensitiveVolume("S12G");
-  GetGeometry(12)->SetSensitiveVolume("S13G");
-  GetGeometry(13)->SetSensitiveVolume("S14G");
+  GetGeometry(16)->SetSensitiveVolume("S11G");
+  GetGeometry(17)->SetSensitiveVolume("S12G");
+  GetGeometry(18)->SetSensitiveVolume("S13G");
+  GetGeometry(19)->SetSensitiveVolume("S14G");
 }