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[u/mrichter/AliRoot.git] / FMD / AliFMDv0.cxx
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-///////////////////////////////////////////////////////////////////////////////
-//                                                                           //
-//  Forward Multiplicity Detector version 0                                  //
-//                                                                           //
-//Begin_Html
+/**************************************************************************
+ * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+ *                                                                        *
+ * Author: The ALICE Off-line Project.                                    *
+ * Contributors are mentioned in the code where appropriate.              *
+ *                                                                        *
+ * Permission to use, copy, modify and distribute this software and its   *
+ * documentation strictly for non-commercial purposes is hereby granted   *
+ * without fee, provided that the above copyright notice appears in all   *
+ * copies and that both the copyright notice and this permission notice   *
+ * appear in the supporting documentation. The authors make no claims     *
+ * about the suitability of this software for any purpose. It is          *
+ * provided "as is" without express or implied warranty.                  *
+ **************************************************************************/
+ /////////////////////////////////////////////////////////////////////
+//                                                                 //
+// Forward Multiplicity detector based on Silicon version 0        //
+//
+//Begin Html       
 /*
-<img src="picts/AliFMDv0Class.gif">
-</pre>
-<br clear=left>
-<font size=+2 color=red>
-<p>The responsible person for this module is
-<a href="mailto:Valeri.Kondratiev@cern.ch">Valeri Kondratiev</a>.
-</font>
-<pre>
+<img src="gif/AliFMDv0Class.gif">
 */
-//End_Html
-//                                                                           //
-///////////////////////////////////////////////////////////////////////////////
+//End Html
+//                                                                  //
+//                                                                  //
+//////////////////////////////////////////////////////////////////////
 
-#include "AliRun.h"
+#include <TMath.h>
+#include <TGeometry.h>
+#include <TTUBE.h>
+#include <TNode.h>
+#include <TLorentzVector.h>
 #include "AliFMDv0.h"
+#include "AliRun.h"
 #include "AliMC.h"
+#include <iostream.h>
+#include <fstream.h>
+#include "AliRndm.h"
+#include "AliMagF.h"
+#include "AliFMDhit.h"
+#include <stdlib.h>
+
+//class TGeant3;
 ClassImp(AliFMDv0)
-//_____________________________________________________________________________
-AliFMDv0::AliFMDv0() : AliFMD()
-{
-  //
-  // Default constructor for FMD version 0
-  //
-}
-//_____________________________________________________________________________
-AliFMDv0::AliFMDv0(const char *name, const char *title)
-  : AliFMD(name,title)
+
+//--------------------------------------------------------------------
+AliFMDv0::AliFMDv0(const char *name, const char *title):
+ AliFMD(name,title)
 {
   //
-  // Standard constructor for FMD version 0
+  // Standart constructor for Forward Multiplicity Detector version 0
   //
+  fIdSens1=0;
+  fIdSens2=0;
+  fIdSens3=0;
+  fIdSens4=0;
+  fIdSens5=0;
+//  setBufferSize(128000);
 }
-//___________________________________________
+//-------------------------------------------------------------------------
+
 void AliFMDv0::CreateGeometry()
 {
-  //
-  // Creation of the geometry of the FMD version 0
-  //
-  //Begin_Html
+ //
+  // Create the geometry of Forward Multiplicity Detector version 0
+  //Detector consists of 5 volumes: 
+  // 1st covered pseudorapidity interval from 3.58 to 2.03
+  // and placed on 62.8cm in Z-direction;
+  // 2nd - from 1.94 to 1.51 and Z=75.2 cm;
+  // 3d  - the same pseudorapidity interval as the 1st 
+  // but on the other side from the interaction point z=-62.8cm;
+  // 4th - simmetricaly with the 2nd : 
+  // pseudorapidity from 1.94 to 1.51, Z=-75.2cm   
+  // 5th - from 3.71 to 5.28, Z=-345cm
+  // Each part has 300mkm Si (sensetive area, detector itself),
+  // 0.75cm of plastic simulated electronics material,
+  // Al support ring 2cm thickness and 1cm width placed on 
+  // the outer radius of each Si disk;
+   //
+  // begin Html
   /*
-    <img src="picts/AliFMDv0Tree.gif">
-  */
-  //End_Html
-  //Begin_Html
-  /*
-    <img src="picts/AliFMDv0.gif">
-  */
-  //End_Html
+   <img src="gif/AliFMDv0.gif">
+   */
+  //
 
-  AliMC* pMC = AliMC::GetMC();
-  
-  Float_t rout, z;
-  Float_t par[3], rin;
-  
-  Int_t *idtmed = fIdtmed->GetArray()-899;    
-  
-  // ******************************************************** 
-  //       DEFINE RIGHT DISK#3  OF FMD 
-  // ******************************************************** 
-  
-  //       Define parameters 
-  
-  rin  = 4.5;
-  rout = 10.5;
-  z    = 85.;
-  //       Ring #1 
-  par[0] = rin;
-  par[1] = rout;
-  par[2] = 1.5;
-  pMC->Gsvolu("R1R3", "TUBE", idtmed[900], par, 3);
-  pMC->Gspos("R1R3", 1, "ALIC", 0., 0., z + 1.5, 0, "ONLY");
-  //       Ring #2 
-  par[0] = rout;
-  par[1] = rout + .65;
-  par[2] = 1.5;
-  pMC->Gsvolu("R2R3", "TUBE", idtmed[901], par, 3);
-  pMC->Gspos("R2R3", 1, "ALIC", 0., 0., z + 1.5, 0, "ONLY");
-  //       Ring #3 
-  par[0] = rout + .65;
-  par[1] = rout + 5.65;
-  par[2] = .025;
-  pMC->Gsvolu("R3R3", "TUBE", idtmed[902], par, 3);
-  pMC->Gspos("R3R3", 1, "ALIC", 0., 0., z + 1.525, 0, "ONLY");
-  // *********************************************************** 
-  //       DEFINE LEFT DISK#3 OF FMD 
-  // *********************************************************** 
-  
-  //       Define parameters 
-  
-  rin  = 4.5;
-  rout = 10.5;
-  z    = -85.;
-  //       Ring #1 
-  par[0] = rin;
-  par[1] = rout;
-  par[2] = 1.5;
-  pMC->Gsvolu("R1L3", "TUBE", idtmed[900], par, 3);
-  pMC->Gspos("R1L3", 1, "ALIC", 0., 0., z - 1.5, 0, "ONLY");
-  //       Ring #2 
-  par[0] = rout;
-  par[1] = rout + .65;
-  par[2] = 1.5;
-  pMC->Gsvolu("R2L3", "TUBE", idtmed[901], par, 3);
-  pMC->Gspos("R2L3", 1, "ALIC", 0., 0., z - 1.5, 0, "ONLY");
-  //       Ring #3 
-  par[0] = rout + .65;
-  par[1] = rout + 5.65;
-  par[2] = .025;
-  pMC->Gsvolu("R3L3", "TUBE", idtmed[902], par, 3);
-  pMC->Gspos("R3L3", 1, "ALIC", 0., 0., z - 1.525, 0, "ONLY");
-  // ******************************************************** 
-  //       DEFINE RIGHT DISK#2  OF FMD 
-  // ******************************************************** 
-  
-  //       Define parameters 
-  
-  rin  = 8.;
-  rout = 14.;
-  z    = 69.7;
-  //       Ring #1 
-  par[0] = rin;
-  par[1] = rout;
-  par[2] = 1.5;
-  pMC->Gsvolu("R1R2", "TUBE", idtmed[900], par, 3);
-  pMC->Gspos("R1R2", 1, "ALIC", 0., 0., z + 1.5, 0, "ONLY");
-  //       Ring #2 
-  par[0] = rout;
-  par[1] = rout + .65;
-  par[2] = 1.5;
-  pMC->Gsvolu("R2R2", "TUBE", idtmed[901], par, 3);
-  pMC->Gspos("R2R2", 1, "ALIC", 0., 0., z + 1.5, 0, "ONLY");
-  //       Ring #3 
-  par[0] = rout + .65;
-  par[1] = rout + 5.65;
-  par[2] = .025;
-  pMC->Gsvolu("R3R2", "TUBE", idtmed[902], par, 3);
-  pMC->Gspos("R3R2", 1, "ALIC", 0., 0., z + 1.525, 0, "ONLY");
-  // *********************************************************** 
-  //       DEFINE LEFT DISK#2 OF FMD 
-  // *********************************************************** 
-  
-  //       Define parameters 
-  
-  rin  = 8.;
-  rout = 14.;
-  z    = -69.7;
-  //       Ring #1 
-  par[0] = rin;
-  par[1] = rout;
-  par[2] = 1.5;
-  pMC->Gsvolu("R1L2", "TUBE", idtmed[900], par, 3);
-  pMC->Gspos("R1L2", 1, "ALIC", 0., 0., z - 1.5, 0, "ONLY");
-  //       Ring #2 
-  par[0] = rout;
-  par[1] = rout + .65;
-  par[2] = 1.5;
-  pMC->Gsvolu("R2L2", "TUBE", idtmed[901], par, 3);
-  pMC->Gspos("R2L2", 1, "ALIC", 0., 0., z - 1.5, 0, "ONLY");
-  //       Ring #3 
-  par[0] = rout + .65;
-  par[1] = rout + 5.65;
-  par[2] = .025;
-  pMC->Gsvolu("R3L2", "TUBE", idtmed[902], par, 3);
-  pMC->Gspos("R3L2", 1, "ALIC", 0., 0., z - 1.525, 0, "ONLY");
-  // ******************************************************** 
-  //       DEFINE RIGHT DISK#1  OF FMD 
-  // ******************************************************** 
-  
-  //       Define parameters 
-  
-  rin  = 8.;
-  rout = 17.5;
-  z    = 42.5;
-  //       Ring #1 
-  par[0] = rin;
-  par[1] = rout;
-  par[2] = 1.5;
-  pMC->Gsvolu("R1R1", "TUBE", idtmed[900], par, 3);
-  pMC->Gspos("R1R1", 1, "ALIC", 0., 0., z + 1.5, 0, "ONLY");
-  //       Ring #2 
-  par[0] = rout;
-  par[1] = rout + .65;
-  par[2] = 1.5;
-  pMC->Gsvolu("R2R1", "TUBE", idtmed[901], par, 3);
-  pMC->Gspos("R2R1", 1, "ALIC", 0., 0., z + 1.5, 0, "ONLY");
-  //       Ring #3 
-  par[0] = rout + .65;
-  par[1] = rout + 5.65;
-  par[2] = .025;
-  pMC->Gsvolu("R3R1", "TUBE", idtmed[902], par, 3);
-  pMC->Gspos("R3R1", 1, "ALIC", 0., 0., z + 1.525, 0, "ONLY");
-  // *********************************************************** 
-  //       DEFINE LEFT DISK#1 OF FMD 
-  // *********************************************************** 
-  
-  //       Define parameters 
-  
-  rin  = 8.;
-  rout = 17.5;
-  z    = -42.5;
-  //       Ring #1 
-  par[0] = rin;
-  par[1] = rout;
-  par[2] = 1.5;
-  pMC->Gsvolu("R1L1", "TUBE", idtmed[900], par, 3);
-  pMC->Gspos("R1L1", 1, "ALIC", 0., 0., z - 1.5, 0, "ONLY");
-  //       Ring #2 
-  par[0] = rout;
-  par[1] = rout + .65;
-  par[2] = 1.5;
-  pMC->Gsvolu("R2L1", "TUBE", idtmed[901], par, 3);
-  pMC->Gspos("R2L1", 1, "ALIC", 0., 0., z - 1.5, 0, "ONLY");
-  //       Ring #3 
-  par[0] = rout + .65;
-  par[1] = rout + 5.65;
-  par[2] = .025;
-  pMC->Gsvolu("R3L1", "TUBE", idtmed[902], par, 3);
-  pMC->Gspos("R3L1", 1, "ALIC", 0., 0., z - 1.525, 0, "ONLY");
-  // *********************************************************** 
-  //       DEFINE LEFT DISK#4 OF FMD 
-  // *********************************************************** 
+  Int_t *idtmed = fIdtmed->GetArray();
+  Int_t ifmd;
+  Int_t idrotm[999];
+  Float_t zfmd,par[3];
+  char name[5], nameSi[5], nameSector[5], nameRing[5];
 
-  //       Define parameters 
+  Float_t rin[6], rout[6],zpos;
 
-  rin  = 4.2;
-  rout = 13.;
-  z    = -229.5;
-  //       Ring #1 
-  par[0] = rin;
-  par[1] = rout;
-  par[2] = 1.5;
-  pMC->Gsvolu("R1L4", "TUBE", idtmed[900], par, 3);
-  pMC->Gspos("R1L4", 1, "ALIC", 0., 0., z - 1.5, 0, "ONLY");
-  //       Ring #2 
-  par[0] = rout;
-  par[1] = rout + .65;
-  par[2] = 1.5;
-  pMC->Gsvolu("R2L4", "TUBE", idtmed[901], par, 3);
-  pMC->Gspos("R2L4", 1, "ALIC", 0., 0., z - 1.5, 0, "ONLY");
-  //       Ring #3 
-  par[0] = rout + .65;
-  par[1] = rout + 5.65;
-  par[2] = .025;
-  pMC->Gsvolu("R3L4", "TUBE", idtmed[902], par, 3);
-  pMC->Gspos("R3L4", 1, "ALIC", 0., 0., z - 1.525, 0, "ONLY");
-}
+  Float_t etain[5]= {3.40, 2.29, 3.68, 2.29, 5.09};
+  Float_t etaout[6]={2.01, 1.70, 2.28, 1.70, 3.68};
+  //  Float_t z[6]={64., 85., -64., -85., -270., -630};
+  Float_t z[6]={62.8, 75.2, -83.4, -75.2, -340.};
+  Float_t zDet=0.03;
+  Float_t zElectronic=0.1;
+  Float_t zSupport=1.;
+
+  Float_t zFMD=1.;
+//-------------------------------------------------------------------
+ //  FMD 
+ //------------------------------------------------------------------
+       cout<<" !!!!!!!!!!!New FMD geometry !!!!!!!!!"<<endl;
+
+  AliMatrix(idrotm[901], 90, 0, 90, 90, 180, 0);
+
+  //  gMC->Gsvolu("GSI","TUBE", idtmed[1], par, 0);
+  gMC->Gsvolu("GEL ","TUBE", idtmed[4], par, 0);
+  gMC->Gsvolu("GSUP","TUBE", idtmed[2], par, 0);
+
+  for (ifmd =0; ifmd < 5; ifmd++){
+
+    sprintf(name,"FMD%d",ifmd+1);
+    sprintf(nameSi,"GSI%d",ifmd+1);
+    sprintf(nameSector,"GSC%d",ifmd+1);
+    sprintf(nameRing,"GRN%d",ifmd+1);
+    printf(name,nameSi);
+    
+    zfmd=TMath::Abs(z[ifmd]);
+    printf("zfmd %f z[ifmd] %f",zfmd,z[ifmd]);
+    AliFMD::Eta2Radius(etain[ifmd],zfmd,&rin[ifmd]);
+    AliFMD::Eta2Radius(etaout[ifmd],zfmd,&rout[ifmd]);
+    
+    par[0]=rin[ifmd]; // pipe size
+    par[1]=rout[ifmd];
+    par[2]=zFMD/2;
+    gMC->Gsvolu(name,"TUBE", idtmed[3], par, 3);
+    //    par[2]=zDet/2;
+    gMC->Gsvolu(nameSi,"TUBE", idtmed[1], par, 0);
+    
+    printf ("rin %f rout %f ZFMD %f\n",par[0],par[1],z[ifmd]);
+    if (z[ifmd] < 0){  
+      gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],0, "ONLY");}
+    else { 
+      gMC->Gspos(name,1,"ALIC",0,0,z[ifmd],idrotm[901], "ONLY");}
+  //Silicon detector
+    par[2]=zDet/2;
+    zpos=zFMD/2 -par[2];
+    gMC->Gsposp(nameSi,ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
+    cout<<" Si "<<nameSi<<" ifmd "<<ifmd<<" rin "<<par[0]<<" rout "<<par[1]<<
+      " zDet "<<par[2]<<endl;
+    //Granularity
+    cout<<"fSectorsSi1 "<<fSectorsSi1<<
+      " fRingsSi1 "<<fRingsSi1<<
+      " fSectorsSi2 "<<fSectorsSi2<<
+      " fRingsSi2 "<<fRingsSi2<<endl;
+   if(ifmd==1||ifmd==3)
+      { 
+       gMC->Gsdvn(nameSector, nameSi , fSectorsSi2, 2);
+       gMC->Gsdvn(nameRing, nameSector, fRingsSi2, 1);
+      }
+    else
+      {
+       gMC->Gsdvn(nameSector, nameSi , fSectorsSi1, 2);
+       gMC->Gsdvn(nameRing, nameSector , fRingsSi1, 1);
+      }
+
+    //Plastic slice for electronics
+    par[2]=zElectronic/2;
+    zpos=zpos-zDet/2-par[2];
+    gMC->Gsposp("GEL ",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
+
+   //Simple Al support
+   par[1]=rout[ifmd];
+   par[0]=rout[ifmd]-2;
+   par[2]=zSupport/2;
+   zpos=zpos-zElectronic/2-par[2];
+   //   gMC->Gsposp("GSUP",ifmd+1,name,0,0,zpos,0, "ONLY",par,3);
+   
+
+  }  
 
-//_____________________________________________________________________________
-void AliFMDv0::DrawModule()
+}    
+
+
+//------------------------------------------------------------------------
+void AliFMDv0::CreateMaterials()
 {
-  //
-  // Draw a shaded view of the FMD version 0
-  //
+ Int_t isxfld   = gAlice->Field()->Integ();
+ Float_t sxmgmx = gAlice->Field()->Max();
+
+ // Plastic CH
+ Float_t aPlastic[2]={1.01,12.01};
+ Float_t zPlastic[2]={1,6};
+ Float_t wPlastic[2]={1,1};
+ Float_t denPlastic=1.03;
+   //
+ //*** Definition Of avaible FMD materials ***
+ AliMaterial(0, "Si chip$", 28.0855,14.,2.33,9.36,999);
+ AliMaterial(1, "Al supprt$", 26.980,13.,2.70,8.9,999);
+ AliMaterial(2, "FMD Air$", 14.61, 7.3, .001205, 30423.,999); 
+ AliMixture( 5, "Plastic$",aPlastic,zPlastic,denPlastic,-2,wPlastic);
+
+//**
+ AliMedium(1, "Si chip$", 0, 1, isxfld, sxmgmx, 1., .001, 1., .001, .001);
+ AliMedium(2, "Al support$", 1, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
+ AliMedium(3, "FMD air$", 2, 0, isxfld, sxmgmx, 1., .001, 1., .001, .001);
+ AliMedium(4, "Plastic$", 5, 0,isxfld, sxmgmx,  10., .01, 1., .003, .003);
+
 
-  AliMC* pMC = AliMC::GetMC();
-  
-  // Set everything unseen
-  pMC->Gsatt("*", "seen", -1);
-  // 
-  // Set ALIC mother transparent
-  pMC->Gsatt("ALIC","SEEN",0);
-  //
-  // Set the volumes visible
-  pMC->Gsatt("R1R3","SEEN",1);
-  pMC->Gsatt("R2R3","SEEN",1);
-  pMC->Gsatt("R3R3","SEEN",1);
-  pMC->Gsatt("R1L3","SEEN",1);
-  pMC->Gsatt("R2L3","SEEN",1);
-  pMC->Gsatt("R3L3","SEEN",1);
-  pMC->Gsatt("R1R2","SEEN",1);
-  pMC->Gsatt("R2R2","SEEN",1);
-  pMC->Gsatt("R3R2","SEEN",1);
-  pMC->Gsatt("R1L2","SEEN",1);
-  pMC->Gsatt("R2L2","SEEN",1);
-  pMC->Gsatt("R3L2","SEEN",1);
-  pMC->Gsatt("R1R1","SEEN",1);
-  pMC->Gsatt("R2R1","SEEN",1);
-  pMC->Gsatt("R3R1","SEEN",1);
-  pMC->Gsatt("R1L1","SEEN",1);
-  pMC->Gsatt("R2L1","SEEN",1);
-  pMC->Gsatt("R3L1","SEEN",1);
-  pMC->Gsatt("R1L4","SEEN",1);
-  pMC->Gsatt("R2L4","SEEN",1);
-  pMC->Gsatt("R3L4","SEEN",1);
-  //
-  pMC->Gdopt("hide", "on");
-  pMC->Gdopt("shad", "on");
-  pMC->Gsatt("*", "fill", 7);
-  pMC->SetClipBox(".");
-  pMC->SetClipBox("*", 0, 1000, -1000, 1000, -1000, 1000);
-  pMC->DefaultRange();
-  pMC->Gdraw("alic", 40, 30, 0, 6, 9, .08, .08);
-  pMC->Gdhead(1111, "Forward Multiplicity Detector version 0");
-  pMC->Gdman(13, 9, "MAN");
 }
+//---------------------------------------------------------------------
+void AliFMDv0::DrawDetector()
+{
+//
+// Draw a shaded view of the Forward multiplicity detector version 0
+//
 
-//_____________________________________________________________________________
-void AliFMDv0::CreateMaterials()
+AliMC* pMC = AliMC::GetMC();
+
+//Set ALIC mother transparent
+pMC->Gsatt("ALIC","SEEN",0);
+//
+//Set volumes visible
+gMC->Gsatt("FMD0","SEEN",1);
+gMC->Gsatt("FMD1","SEEN",1);
+gMC->Gsatt("FMD2","SEEN",1);
+gMC->Gsatt("FMD3","SEEN",1);
+gMC->Gsatt("FMD4","SEEN",1);
+gMC->Gsatt("FMD5","SEEN",1);
+
+//
+gMC->Gdopt("hide","on");
+gMC->Gdopt("shad","on");
+gMC->SetClipBox(".");
+gMC->SetClipBox("*",0,1000,-1000,1000,-1000,1000);
+gMC->DefaultRange();
+gMC->Gdraw("alic",40,30,0,12,9.5,.2,0.2);
+gMC->Gdhead(1111,"Forward multiplicity detector");
+gMC->Gdopt("hide","off");
+}
+//-------------------------------------------------------------------
+void AliFMDv0::Init()
+{
+// Initialises version 0 of the Forward Multiplicity Detector
+//
+AliMC* gMC=AliMC::GetMC();
+AliFMD::Init();
+fIdSens1=gMC->VolId("GRN1");
+fIdSens2=gMC->VolId("GRN2");
+fIdSens3=gMC->VolId("GRN3");
+fIdSens4=gMC->VolId("GRN4");
+fIdSens5=gMC->VolId("GRN5");
+if (fDebug) printf("*** FMD version 0 initialized ***\n");
+}
+
+//-------------------------------------------------------------------
+
+void AliFMDv0::StepManager()
 {
   //
-  // Create Materials for version 0 of FMD
+  // Called for every step in the Forward Multiplicity Detector
   //
-
-  //     Material for ring #1 
-  Float_t ar1[8] = { 55.8,58.7,52.,47.9,16.,28.,207.2,27. };
-  Float_t zr1[8] = { 26.,28.,24.,22.,8.,14.,82.,13. };
-  Float_t wr1[8] = { .27,.081,.054,.045,.18,.25,.06,.06 };
-  //     Material for ring #2 
-  Float_t ar2[3] = { 55.8,27.,16. };
-  Float_t zr2[3] = { 26.,13.,8. };
-  Float_t wr2[3] = { .35,.34,.31 };
-  //     Material for ring #3 
-  Float_t ar3[3] = { 28.,27.,16. };
-  Float_t zr3[3] = { 14.,13.,8. };
-  Float_t wr3[3] = { .37,.33,.3 };
-  
-  Float_t epsil, stmin, deemax, tmaxfd, stemax;
-  
-  Int_t   ISXFLD = gAlice->Field()->Integ();
-  Float_t SXMGMX = gAlice->Field()->Max();
-  
-  //     Ring #1 
-  
-  AliMixture(1, "FMD_R1$", ar1, zr1, 2.69, 8, wr1);
-  
-  //     Ring #2 
-  
-  AliMixture(2, "FMD_R2$", ar2, zr2, 2.63, 3, wr2);
-  
-  //     Ring #3 
-  
-  AliMixture(3, "FMD_R3$", ar3, zr3, 3.15, 3, wr3);
-  // ******************************************************* 
-  //     Defines tracking media parameters. 
-  // ******************************************************* 
-  epsil  = .001; // Tracking precision, DLS 
-  stemax = -1.;  // Maximum displacement for multiple scattering 
-  tmaxfd = -20.; // Maximum angle due to field deflection 
-  deemax = -.3;  // Maximum fractional energy loss, DLS 
-  stmin  = -.8;
-  // ******************************************************** 
-  AliMedium(1, "FMD_R1_L3        ", 1, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
-  AliMedium(2, "FMD_R2_L3        ", 2, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
-  AliMedium(3, "FMD_R3_L3        ", 3, 0, ISXFLD, SXMGMX, tmaxfd, stemax, deemax, epsil, stmin);
 }
 
-