review on materials and

[u/mrichter/AliRoot.git] / TOF / AliTOFv2FHoles.cxx

/**************************************************************************
 * 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.                  *
 **************************************************************************/



///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  Time Of Flight: design of C.Williams                                     
//									     
//  This class contains the functions for version 2 of the Time Of Flight    //
//  detector.                                                                //
//
//  VERSION WITH 5 MODULES AND TILTED STRIPS 
//  
//  HOLES FOR PHOS AND RICH DETECTOR
//
//  !Not Official version!
//
//   Requested by Andreas Morsch to have TOFv2 full compliant
//   with FRAME version 0
//  
//   Author:

//   Fabrizio Pierella
//   University of Bologna - Italy
//
//
//Begin_Html
/*
<img src="picts/AliTOFv2FHolesClass.gif">
*/
//End_Html
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#include <iostream.h>
#include <stdlib.h>

#include "AliTOFv2FHoles.h"
#include "TBRIK.h"
#include "TGeometry.h"
#include "TNode.h"
#include <TLorentzVector.h>
#include "TObject.h"
#include "AliRun.h"
#include "AliMC.h"
#include "AliMagF.h"
#include "AliConst.h"

 
ClassImp(AliTOFv2FHoles)
 
//_____________________________________________________________________________
AliTOFv2FHoles::AliTOFv2FHoles()
{
  //
  // Default constructor
  //
}
 
//_____________________________________________________________________________
AliTOFv2FHoles::AliTOFv2FHoles(const char *name, const char *title)
        : AliTOF(name,title)
{
  //
  // Standard constructor
  //
  //
  // Check that FRAME is there otherwise we have no place where to
  // put TOF
  AliModule* frame=gAlice->GetModule("FRAME");
  if(!frame) {
    Error("Ctor","TOF needs FRAME to be present\n");
    exit(1);
  } else
    if(frame->IsVersion()!=0) { 
      Error("Ctor","FRAME version 0 needed with this version of TOF\n");
      exit(1);
    }
}

//____________________________________________________________________________

void AliTOFv2FHoles::BuildGeometry()
{
  //
  // Build TOF ROOT geometry for the ALICE event display
  //
  TNode *node, *top;
  const int kColorTOF  = 27;

  // Find top TNODE
  top = gAlice->GetGeometry()->GetNode("alice");

  // Position the different copies
  const Float_t krTof  =(fRmax+fRmin)/2;
  const Float_t khTof  = fRmax-fRmin;
  const Int_t   kNTof = fNTof;
  const Float_t kPi   = TMath::Pi();
  const Float_t kangle = 2*kPi/kNTof;
  Float_t ang;

  // Define TOF basic volume
  
  char nodeName0[6], nodeName1[6], nodeName2[6]; 
  char nodeName3[6], nodeName4[6], rotMatNum[6];

  new TBRIK("S_TOF_C","TOF box","void",
            120*0.5,khTof*0.5,fZlenC*0.5);
  new TBRIK("S_TOF_B","TOF box","void",
            120*0.5,khTof*0.5,fZlenB*0.5);
  new TBRIK("S_TOF_A","TOF box","void",
            120*0.5,khTof*0.5,fZlenA*0.5);

  for (Int_t nodeNum=1;nodeNum<19;nodeNum++){
     
      if (nodeNum<10) {
           sprintf(rotMatNum,"rot50%i",nodeNum);
           sprintf(nodeName0,"FTO00%i",nodeNum);
           sprintf(nodeName1,"FTO10%i",nodeNum);
           sprintf(nodeName2,"FTO20%i",nodeNum);
           sprintf(nodeName3,"FTO30%i",nodeNum);
           sprintf(nodeName4,"FTO40%i",nodeNum);
      }
      if (nodeNum>9) {
           sprintf(rotMatNum,"rot5%i",nodeNum);
           sprintf(nodeName0,"FTO0%i",nodeNum);
           sprintf(nodeName1,"FTO1%i",nodeNum);
           sprintf(nodeName2,"FTO2%i",nodeNum);
           sprintf(nodeName3,"FTO3%i",nodeNum);
           sprintf(nodeName4,"FTO4%i",nodeNum);
      }
 
      new TRotMatrix(rotMatNum,rotMatNum,90,-20*nodeNum,90,90-20*nodeNum,0,0);
      ang = (4.5-nodeNum) * kangle;

      top->cd();
      node = new TNode(nodeName0,nodeName0,"S_TOF_C",krTof*TMath::Cos(ang),krTof*TMath::Sin(ang),299.15,rotMatNum);
      node->SetLineColor(kColorTOF);
      fNodes->Add(node); 

      top->cd(); 
      node = new TNode(nodeName1,nodeName1,"S_TOF_C",krTof*TMath::Cos(ang),krTof*TMath::Sin(ang),-299.15,rotMatNum);
      node->SetLineColor(kColorTOF);
      fNodes->Add(node); 
if (nodeNum !=1 && nodeNum!=2 && nodeNum !=18)
    {
      top->cd();
      node = new TNode(nodeName2,nodeName2,"S_TOF_B",krTof*TMath::Cos(ang),krTof*TMath::Sin(ang),146.45,rotMatNum);
      node->SetLineColor(kColorTOF);
      fNodes->Add(node); 

      top->cd();
      node = new TNode(nodeName3,nodeName3,"S_TOF_B",krTof*TMath::Cos(ang),krTof*TMath::Sin(ang),-146.45,rotMatNum);
      node->SetLineColor(kColorTOF);
      fNodes->Add(node); 
  } // Holes for RICH detector

if ((nodeNum<8 || nodeNum>12) && nodeNum !=1 && nodeNum!=2 && nodeNum !=18)
    { 
      top->cd();
      node = new TNode(nodeName4,nodeName4,"S_TOF_A",krTof*TMath::Cos(ang),krTof*TMath::Sin(ang),0.,rotMatNum);
      node->SetLineColor(kColorTOF);
      fNodes->Add(node); 
     } // Holes for PHOS detector (+ Holes for RICH detector, central part)
  } // end loop on nodeNum
}

 
//_____________________________________________________________________________
void AliTOFv2FHoles::CreateGeometry()
{
  //
  // Create geometry for Time Of Flight version 0
  //
  //Begin_Html
  /*
    <img src="picts/AliTOFv2FHoles.gif">
  */
  //End_Html
  //
  // Creates common geometry
  //
  AliTOF::CreateGeometry();
}
 
//_____________________________________________________________________________
void AliTOFv2FHoles::TOFpc(Float_t xtof, Float_t ytof, Float_t zlenC,
		     Float_t zlenB, Float_t zlenA, Float_t ztof0)
{
  //
  // Definition of the Time Of Fligh Resistive Plate Chambers
  // xFLT, yFLT, zFLT - sizes of TOF modules (large)
  
  Float_t  ycoor, zcoor;
  Float_t  par[3];
  Int_t    *idtmed = fIdtmed->GetArray()-499;
  Int_t    idrotm[100];
  Int_t    nrot = 0;
  Float_t  hTof = fRmax-fRmin;
  
  Float_t radius = fRmin+2.;//cm

  // fixing parameters as requested by FRAME v0 (Morsch 16-10-2001)
  zlenA = 124.;  // cm (A module length) original size 106.   enlarged   
  zlenB = 154.;  // cm (B module length) original size 141.   enlarged
  zlenC = 159.5; // cm (C module length) original size 175.5  reduced
  ztof0 = 375.5; // total half-length of a TOF sector original size 371.5cm
  

  par[0] =  xtof * 0.5;
  par[1] =  ytof * 0.5;
  par[2] = zlenC * 0.5;
  gMC->Gsvolu("FTOC", "BOX ", idtmed[506], par, 3);
  par[2] = zlenB * 0.5;
  gMC->Gsvolu("FTOB", "BOX ", idtmed[506], par, 3);
  par[2] = zlenA * 0.5;
  gMC->Gsvolu("FTOA", "BOX ", idtmed[506], par, 3);


  // Positioning of modules

  Float_t zcor1 = ztof0 - zlenC*0.5;
  Float_t zcor2 = ztof0 - zlenC - zlenB*0.5;
  Float_t zcor3 =    0.00;
  Float_t zcor4 =  156.75 - zlenC*0.5;
  Float_t zcor5 = -156.75 + zlenB*0.5;
  
  AliMatrix(idrotm[0], 90.,  0., 0., 0., 90,-90.);
  AliMatrix(idrotm[1], 90.,180., 0., 0., 90, 90.);
  gMC->Gspos("FTOC", 1, "BTO1", 0,  zcor1, 0, idrotm[0], "ONLY");
  gMC->Gspos("FTOC", 2, "BTO1", 0, -zcor1, 0, idrotm[1], "ONLY");
  gMC->Gspos("FTOC", 1, "BTO2", 0,  zcor4, 0, idrotm[0], "ONLY");
  gMC->Gspos("FTOC", 1, "BTO3", 0,   0.,   0, idrotm[0], "ONLY");
  
  gMC->Gspos("FTOB", 1, "BTO1", 0,  zcor2, 0, idrotm[0], "ONLY");
  gMC->Gspos("FTOB", 2, "BTO1", 0, -zcor2, 0, idrotm[1], "ONLY");
  gMC->Gspos("FTOB", 1, "BTO2", 0,  zcor5, 0, idrotm[0], "ONLY");
  
  gMC->Gspos("FTOA", 0, "BTO1", 0,  zcor3, 0, idrotm[0], "ONLY");
  
  Float_t db = 0.5;//cm
  Float_t xFLT, xFST, yFLT, zFLTA, zFLTB, zFLTC;
  
  xFLT = fStripLn;
  yFLT = ytof;
  zFLTA = zlenA;
  zFLTB = zlenB;
  zFLTC = zlenC;
  
  xFST = xFLT-fDeadBndX*2; //cm
  
  // Sizes of MRPC pads
  
  Float_t yPad = 0.505;   //cm 
  
  // Large not sensitive volumes with Insensitive Freon
  par[0] = xFLT*0.5;
  par[1] = yFLT*0.5;
  
  if(fDebug) 
    cout <<ClassName()
	 <<": ************************* TOF geometry **************************"
	 <<endl;
  
  par[2] = (zFLTA *0.5);
  gMC->Gsvolu("FLTA", "BOX ", idtmed[512], par, 3); // Insensitive Freon
  gMC->Gspos ("FLTA", 0, "FTOA", 0., 0., 0., 0, "ONLY");
  
  par[2] = (zFLTB * 0.5);
  gMC->Gsvolu("FLTB", "BOX ", idtmed[512], par, 3); // Insensitive Freon
  gMC->Gspos ("FLTB", 0, "FTOB", 0., 0., 0., 0, "ONLY");
  
  par[2] = (zFLTC * 0.5);
  gMC->Gsvolu("FLTC", "BOX ", idtmed[512], par, 3); // Insensitive Freon
  gMC->Gspos ("FLTC", 0, "FTOC", 0., 0., 0., 0, "ONLY");

  ///// Layers of Aluminum before and after detector /////
  ///// Aluminum Box for Modules (1.8 mm thickness)  /////
  ///// lateral walls not simulated for the time being
  //const Float_t khAlWall = 0.18;
  // fp to be checked
  const Float_t khAlWall = 0.11;
  par[0] = xFLT*0.5;
  par[1] = khAlWall/2.;//cm
  ycoor = -yFLT/2 + par[1];
  par[2] = (zFLTA *0.5);
  gMC->Gsvolu("FALA", "BOX ", idtmed[508], par, 3); // Alluminium
  gMC->Gspos ("FALA", 1, "FLTA", 0., ycoor, 0., 0, "ONLY");
  gMC->Gspos ("FALA", 2, "FLTA", 0.,-ycoor, 0., 0, "ONLY");
  par[2] = (zFLTB *0.5);
  gMC->Gsvolu("FALB", "BOX ", idtmed[508], par, 3); // Alluminium 
  gMC->Gspos ("FALB", 1, "FLTB", 0., ycoor, 0., 0, "ONLY");
  gMC->Gspos ("FALB", 2, "FLTB", 0.,-ycoor, 0., 0, "ONLY");
  par[2] = (zFLTC *0.5);
  gMC->Gsvolu("FALC", "BOX ", idtmed[508], par, 3); // Alluminium
  gMC->Gspos ("FALC", 1, "FLTC", 0., ycoor, 0., 0, "ONLY");
  gMC->Gspos ("FALC", 2, "FLTC", 0.,-ycoor, 0., 0, "ONLY");
  
  ///////////////// Detector itself //////////////////////
  
  const Float_t  kdeadBound  =  fDeadBndZ; //cm non-sensitive between the pad edge 
  //and the boundary of the strip
  const Int_t    knx    = fNpadX;          // number of pads along x
  const Int_t    knz    = fNpadZ;          // number of pads along z
  const Float_t  kspace = fSpace;            //cm distance from the front plate of the box

  Float_t zSenStrip  = fZpad*fNpadZ;//cm
  Float_t stripWidth = zSenStrip + 2*kdeadBound;

  par[0] = xFLT*0.5;
  par[1] = yPad*0.5; 
  par[2] = stripWidth*0.5;
  
  // new description for strip volume -double stack strip-
  // -- all constants are expressed in cm
  // heigth of different layers
  const Float_t khhony = 0.8     ;   // heigth of HONY  Layer
  const Float_t khpcby = 0.08    ;   // heigth of PCB   Layer
  const Float_t khmyly = 0.035   ;   // heigth of MYLAR Layer
  const Float_t khgraphy = 0.02  ;   // heigth of GRAPHITE Layer
  const Float_t khglasseiy = 0.135;   // 0.6 Ext. Glass + 1.1 i.e. (Int. Glass/2) (mm)
  const Float_t khsensmy = 0.11  ;   // heigth of Sensitive Freon Mixture
  const Float_t kwsensmz = 2*3.5 ;   // cm
  const Float_t klsensmx = 48*2.5;   // cm
  const Float_t kwpadz = 3.5;   // cm z dimension of the FPAD volume
  const Float_t klpadx = 2.5;   // cm x dimension of the FPAD volume
  
  // heigth of the FSTR Volume (the strip volume)
  const Float_t khstripy = 2*khhony+3*khpcby+4*(khmyly+khgraphy+khglasseiy)+2*khsensmy;
  // width  of the FSTR Volume (the strip volume)
  const Float_t kwstripz = 10.;
  // length of the FSTR Volume (the strip volume)
  const Float_t klstripx = 122.;
  
  Float_t parfp[3]={klstripx*0.5,khstripy*0.5,kwstripz*0.5};
  // coordinates of the strip center in the strip reference frame; used for positioning
  // internal strip volumes
  Float_t posfp[3]={0.,0.,0.};   
  
  
  // FSTR volume definition and filling this volume with non sensitive Gas Mixture
  gMC->Gsvolu("FSTR","BOX",idtmed[512],parfp,3);
  //-- HONY Layer definition
  //  parfp[0] = -1;
  parfp[1] = khhony*0.5;
  //  parfp[2] = -1;
  gMC->Gsvolu("FHON","BOX",idtmed[503],parfp,3);
  // positioning 2 HONY Layers on FSTR volume
  
  posfp[1]=-khstripy*0.5+parfp[1];
  gMC->Gspos("FHON",1,"FSTR",0., posfp[1],0.,0,"ONLY");
  gMC->Gspos("FHON",2,"FSTR",0.,-posfp[1],0.,0,"ONLY");
  
  //-- PCB Layer definition 
  parfp[1] = khpcby*0.5;
  gMC->Gsvolu("FPCB","BOX",idtmed[504],parfp,3);
  // positioning 2 PCB Layers on FSTR volume
  posfp[1]=-khstripy*0.5+khhony+parfp[1];
  gMC->Gspos("FPCB",1,"FSTR",0., posfp[1],0.,0,"ONLY");
  gMC->Gspos("FPCB",2,"FSTR",0.,-posfp[1],0.,0,"ONLY");
  // positioning the central PCB layer
  gMC->Gspos("FPCB",3,"FSTR",0.,0.,0.,0,"ONLY");

  
  
  //-- MYLAR Layer definition
  parfp[1] = khmyly*0.5;
  gMC->Gsvolu("FMYL","BOX",idtmed[511],parfp,3);
  // positioning 2 MYLAR Layers on FSTR volume
  posfp[1] = -khstripy*0.5+khhony+khpcby+parfp[1]; 
  gMC->Gspos("FMYL",1,"FSTR",0., posfp[1],0.,0,"ONLY");
  gMC->Gspos("FMYL",2,"FSTR",0.,-posfp[1],0.,0,"ONLY");
  // adding further 2 MYLAR Layers on FSTR volume
  posfp[1] = khpcby*0.5+parfp[1];
  gMC->Gspos("FMYL",3,"FSTR",0., posfp[1],0.,0,"ONLY");
  gMC->Gspos("FMYL",4,"FSTR",0.,-posfp[1],0.,0,"ONLY");
  
  
  //-- Graphite Layer definition
  parfp[1] = khgraphy*0.5;
  gMC->Gsvolu("FGRP","BOX",idtmed[502],parfp,3);
  // positioning 2 Graphite Layers on FSTR volume
  posfp[1] = -khstripy*0.5+khhony+khpcby+khmyly+parfp[1];
  gMC->Gspos("FGRP",1,"FSTR",0., posfp[1],0.,0,"ONLY");
  gMC->Gspos("FGRP",2,"FSTR",0.,-posfp[1],0.,0,"ONLY");
  // adding further 2 Graphite Layers on FSTR volume
  posfp[1] = khpcby*0.5+khmyly+parfp[1];
  gMC->Gspos("FGRP",3,"FSTR",0., posfp[1],0.,0,"ONLY");
  gMC->Gspos("FGRP",4,"FSTR",0.,-posfp[1],0.,0,"ONLY");
  
  
  //-- Glass (EXT. +Semi INT.) Layer definition
  parfp[1] = khglasseiy*0.5;
  gMC->Gsvolu("FGLA","BOX",idtmed[514],parfp,3);
  // positioning 2 Glass Layers on FSTR volume
  posfp[1] = -khstripy*0.5+khhony+khpcby+khmyly+khgraphy+parfp[1];
  gMC->Gspos("FGLA",1,"FSTR",0., posfp[1],0.,0,"ONLY");
  gMC->Gspos("FGLA",2,"FSTR",0.,-posfp[1],0.,0,"ONLY");
  // adding further 2 Glass Layers on FSTR volume
  posfp[1] = khpcby*0.5+khmyly+khgraphy+parfp[1];
  gMC->Gspos("FGLA",3,"FSTR",0., posfp[1],0.,0,"ONLY");
  gMC->Gspos("FGLA",4,"FSTR",0.,-posfp[1],0.,0,"ONLY");
  
  
  //-- Sensitive Mixture Layer definition
  parfp[0] = klsensmx*0.5;
  parfp[1] = khsensmy*0.5;
  parfp[2] = kwsensmz*0.5;
  gMC->Gsvolu("FSEN","BOX",idtmed[513],parfp,3);
  gMC->Gsvolu("FNSE","BOX",idtmed[512],parfp,3);
  // positioning 2 gas Layers on FSTR volume
  // the upper is insensitive freon
  // while the remaining is sensitive
  posfp[1] = khpcby*0.5+khmyly+khgraphy+khglasseiy+parfp[1];
  gMC->Gspos("FNSE",0,"FSTR", 0., posfp[1],0.,0,"ONLY");
  gMC->Gspos("FSEN",0,"FSTR", 0.,-posfp[1],0.,0,"ONLY");
  
  // dividing FSEN along z in knz=2 and along x in knx=48
  gMC->Gsdvn("FSEZ","FSEN",knz,3);
  gMC->Gsdvn("FSEX","FSEZ",knx,1);
  
  // FPAD volume definition
  parfp[0] = klpadx*0.5;    
  parfp[1] = khsensmy*0.5;
  parfp[2] = kwpadz*0.5;
  gMC->Gsvolu("FPAD","BOX",idtmed[513],parfp,3);
  // positioning the FPAD volumes on previous divisions
  gMC->Gspos("FPAD",0,"FSEX",0.,0.,0.,0,"ONLY");
  
  ////  Positioning the Strips  (FSTR) in the FLT volumes  /////
  
  // Plate A (Central) 
  
  Float_t t = zFLTC+zFLTB+zFLTA*0.5+ 2*db;//Half Width of Barrel
  
  Float_t gap  = fGapA+1.; //cm  updated distance between the strip axis
  // 1 cm is a special value exclusively for AliTOFv2FHoles geometry
  Float_t zpos = 0;
  Float_t ang  = 0;
  Int_t i=1,j=1;
  nrot  = 0;
  zcoor = 0;
  ycoor = -14.5 + kspace ; //2 cm over front plate
  
  AliMatrix (idrotm[0],  90.,  0.,90.,90.,0., 90.);   
  gMC->Gspos("FSTR",j,"FLTA",0.,ycoor, 0.,idrotm[0],"ONLY");
  
  if(fDebug) {
    printf("%s: %f,  St. %2i, Pl.3 ",ClassName(),ang*kRaddeg,i); 
    printf("%s: y = %f,  z = %f, zpos = %f \n",ClassName(),ycoor,zcoor,zpos);
  }
  
  zcoor -= zSenStrip;
  j++;
  Int_t upDown = -1; // upDown=-1 -> Upper strip
  // upDown=+1 -> Lower strip
  do{
    ang = atan(zcoor/radius);
    ang *= kRaddeg;
    AliMatrix (idrotm[nrot],  90.,  0.,90.-ang,90.,-ang, 90.);   
    AliMatrix (idrotm[nrot+1],90.,180.,90.+ang,90., ang, 90.);
    ang /= kRaddeg;
    ycoor = -14.5+ kspace; //2 cm over front plate
    ycoor += (1-(upDown+1)/2)*gap;
    gMC->Gspos("FSTR",j  ,"FLTA",0.,ycoor, zcoor,idrotm[nrot],  "ONLY");
    gMC->Gspos("FSTR",j+1,"FLTA",0.,ycoor,-zcoor,idrotm[nrot+1],"ONLY");
    
    if(fDebug) {
      printf("%s: %f,  St. %2i, Pl.3 ",ClassName(),ang*kRaddeg,i);
      printf("%s: y = %f,  z = %f, zpos = %f \n",ClassName(),ycoor,zcoor,zpos);
    }
    
    j += 2;
    upDown*= -1; // Alternate strips 
    zcoor = zcoor-(zSenStrip/2)/TMath::Cos(ang)-
      upDown*gap*TMath::Tan(ang)-
      (zSenStrip/2)/TMath::Cos(ang);
  } while (zcoor-(stripWidth/2)*TMath::Cos(ang)>-t+zFLTC+zFLTB+db*2);
  
  zcoor = zcoor+(zSenStrip/2)/TMath::Cos(ang)+
    upDown*gap*TMath::Tan(ang)+
    (zSenStrip/2)/TMath::Cos(ang);
  
  gap = fGapB;
  zcoor = zcoor-(zSenStrip/2)/TMath::Cos(ang)-
    upDown*gap*TMath::Tan(ang)-
    (zSenStrip/2)/TMath::Cos(ang);
  
  ang = atan(zcoor/radius);
  ang *= kRaddeg;
  AliMatrix (idrotm[nrot],  90.,  0.,90.-ang,90.,-ang, 90.);   
  AliMatrix (idrotm[nrot+1],90.,180.,90.+ang,90., ang, 90.);
  ang /= kRaddeg;
  
  ycoor = -14.5+ kspace; //2 cm over front plate
  ycoor += (1-(upDown+1)/2)*gap;
  
  /* for FRAME v0
     gMC->Gspos("FSTR",j  ,"FLTA",0.,ycoor, zcoor,idrotm[nrot],  "ONLY");
     gMC->Gspos("FSTR",j+1,"FLTA",0.,ycoor,-zcoor,idrotm[nrot+1],"ONLY");
  */
  
  if(fDebug) {   
    printf("%s: %f,  St. %2i, Pl.3 ",ClassName(),ang*kRaddeg,i);  
    printf("%s: y = %f,  z = %f, zpos = %f \n",ClassName(),ycoor,zcoor,zpos);  
  }   
  
  ycoor = -hTof/2.+ kspace;//2 cm over front plate
  
  // Plate  B
  
  nrot = 0;
  i=1;
  upDown = 1;
  Float_t deadRegion = 1.0;//cm
  
  zpos = zcoor - (zSenStrip/2)/TMath::Cos(ang)-
    upDown*gap*TMath::Tan(ang)-
    (zSenStrip/2)/TMath::Cos(ang)-
    deadRegion/TMath::Cos(ang);
  
  ang = atan(zpos/radius);
  ang *= kRaddeg;
  AliMatrix (idrotm[nrot], 90., 0., 90.-ang,90.,ang, 270.);
  ang /= kRaddeg;
  ycoor = -hTof*0.5+ kspace ; //2 cm over front plate
  ycoor += (1-(upDown+1)/2)*gap;
  zcoor = zpos+(zFLTA*0.5+zFLTB*0.5+db); // Moves to the system of the modulus FLTB
  gMC->Gspos("FSTR",i, "FLTB", 0., ycoor, zcoor,idrotm[nrot], "ONLY");
  
  if(fDebug) {   
    printf("%s: %f,  St. %2i, Pl.4 ",ClassName(),ang*kRaddeg,i);
    printf("%s: y = %f,  z = %f, zpos = %f \n",ClassName(),ycoor,zcoor,zpos);
  }   
  
  i++;
  upDown*=-1;
  
  do {
    zpos = zpos - (zSenStrip/2)/TMath::Cos(ang)-
      upDown*gap*TMath::Tan(ang)-
      (zSenStrip/2)/TMath::Cos(ang);
    ang = atan(zpos/radius);
    ang *= kRaddeg;
    AliMatrix (idrotm[nrot], 90., 0., 90.-ang,90.,ang, 270.);
    ang /= kRaddeg;
    ycoor = -hTof*0.5+ kspace ; //2 cm over front plate
    ycoor += (1-(upDown+1)/2)*gap;
    zcoor = zpos+(zFLTA*0.5+zFLTB*0.5+db); // Moves to the system of the modulus FLTB
    gMC->Gspos("FSTR",i, "FLTB", 0., ycoor, zcoor,idrotm[nrot], "ONLY");
    
    if(fDebug) {
      printf("%s: %f,  St. %2i, Pl.4 ",ClassName(),ang*kRaddeg,i);
      printf("%s: y = %f,  z = %f, zpos = %f \n",ClassName(),ycoor,zcoor,zpos);
    }
    
    upDown*=-1;
    i++;
  } while (TMath::Abs(ang*kRaddeg)<22.5);
  //till we reach a tilting angle of 22.5 degrees
  
  ycoor = -hTof*0.5+ kspace ; //2 cm over front plate
  zpos = zpos - zSenStrip/TMath::Cos(ang);
  // this avoid overlaps in between outer strips in plate B
  Float_t deltaMovingUp=0.8;    // [cm]
  //Float_t deltaMovingDown=-0.0; // [cm] special value for AliTOFv2FHoles
  
  do {
    ang = atan(zpos/radius);
    ang *= kRaddeg;
    AliMatrix (idrotm[nrot], 90., 0., 90.-ang,90.,ang, 270.);
    ang /= kRaddeg;
    zcoor = zpos+(zFLTB/2+zFLTA/2+db);
    gMC->Gspos("FSTR",i, "FLTB", 0., ycoor+deltaMovingUp, zcoor,idrotm[nrot], "ONLY");
    deltaMovingUp+=0.8; // update delta moving toward the end of the plate
    zpos = zpos - zSenStrip/TMath::Cos(ang);
    if(fDebug) {
      printf("%s: %f,  St. %2i, Pl.4 ",ClassName(),ang*kRaddeg,i);
      printf("%s: y = %f,  z = %f, zpos = %f \n",ClassName(),ycoor,zcoor,zpos);
    }
    i++;
    
  }  while (zpos-stripWidth*0.5/TMath::Cos(ang)>-t+zFLTC+db);
  
  // Plate  C
  
  zpos = zpos + zSenStrip/TMath::Cos(ang);
  
  zpos = zpos - (zSenStrip/2)/TMath::Cos(ang)+
    gap*TMath::Tan(ang)-
    (zSenStrip/2)/TMath::Cos(ang);
  
  nrot = 0;
  i=0;
  Float_t deltaGap=-2.5; // [cm] update distance from strip center and plate
  ycoor= -hTof*0.5+kspace+gap+deltaGap;
  
  do {
    i++;
    ang = atan(zpos/radius);
    ang *= kRaddeg;
    AliMatrix (idrotm[nrot], 90., 0., 90.-ang,90.,ang, 270.);
    ang /= kRaddeg;
    zcoor = zpos+(zFLTC*0.5+zFLTB+zFLTA*0.5+db*2);
    if (i!=1)
      gMC->Gspos("FSTR",i, "FLTC", 0., ycoor, zcoor,idrotm[nrot], "ONLY");
    
    if(fDebug) {
      printf("%s: %f,  St. %2i, Pl.5 ",ClassName(),ang*kRaddeg,i);
      printf("%s: y = %f,  z = %f, zpos = %f \n",ClassName(),ycoor,zcoor,zpos);
    }
    
    zpos = zpos - zSenStrip/TMath::Cos(ang);
  }  while (zpos-stripWidth*TMath::Cos(ang)*0.5>-t);

 
  ////////// Layers after strips /////////////////
  // Al Layer thickness (2.3mm) factor 0.7
  
  Float_t overSpace = fOverSpc;//cm
  
  par[0] = xFLT*0.5;
  par[1] = 0.115*0.7; // factor 0.7
  par[2] = (zFLTA *0.5);
  ycoor = -yFLT/2 + overSpace + par[1];
  gMC->Gsvolu("FPEA", "BOX ", idtmed[508], par, 3); // Al
  gMC->Gspos ("FPEA", 0, "FLTA", 0., ycoor, 0., 0, "ONLY");
  par[2] = (zFLTB *0.5);
  gMC->Gsvolu("FPEB", "BOX ", idtmed[508], par, 3); // Al
  gMC->Gspos ("FPEB", 0, "FLTB", 0., ycoor, 0., 0, "ONLY");
  par[2] = (zFLTC *0.5);
  gMC->Gsvolu("FPEC", "BOX ", idtmed[508], par, 3); // Al
  gMC->Gspos ("FPEC", 0, "FLTC", 0., ycoor, 0., 0, "ONLY");


  // plexiglass thickness: 1.5 mm ; factor 0.3
  ycoor += par[1];
  par[0] = xFLT*0.5;
  par[1] = 0.075*0.3; // factor 0.3 
  par[2] = (zFLTA *0.5);
  ycoor += par[1];
  gMC->Gsvolu("FECA", "BOX ", idtmed[505], par, 3); // Plexigl.
  gMC->Gspos ("FECA", 0, "FLTA", 0., ycoor, 0., 0, "ONLY");
  par[2] = (zFLTB *0.5);
  gMC->Gsvolu("FECB", "BOX ", idtmed[505], par, 3); // Plexigl.
  gMC->Gspos ("FECB", 0, "FLTB", 0., ycoor, 0., 0, "ONLY");
  par[2] = (zFLTC *0.5);
  gMC->Gsvolu("FECC", "BOX ", idtmed[505], par, 3); // Plexigl.
  gMC->Gspos ("FECC", 0, "FLTC", 0., ycoor, 0., 0, "ONLY");
  
  // frame of Air
  ycoor += par[1];
  par[0] = xFLT*0.5;
  par[1] = (yFLT/2-ycoor-khAlWall)*0.5; // Aluminum layer considered (0.18 cm)
  par[2] = (zFLTA *0.5);
  ycoor += par[1];
  gMC->Gsvolu("FAIA", "BOX ", idtmed[500], par, 3); // Air
  gMC->Gspos ("FAIA", 0, "FLTA", 0., ycoor, 0., 0, "ONLY");
  par[2] = (zFLTB *0.5);
  gMC->Gsvolu("FAIB", "BOX ", idtmed[500], par, 3); // Air
  gMC->Gspos ("FAIB", 0, "FLTB", 0., ycoor, 0., 0, "ONLY");
  par[2] = (zFLTC *0.5);
  gMC->Gsvolu("FAIC", "BOX ", idtmed[500], par, 3); // Air
  gMC->Gspos ("FAIC", 0, "FLTC", 0., ycoor, 0., 0, "ONLY");

  
  // start with cards and cooling tubes
  // finally, cards, cooling tubes and layer for thermal dispersion
  // 3 volumes
  // card volume definition
  
  // see GEOM200 in GEANT manual
  AliMatrix(idrotm[98], 90., 0., 90., 90., 0., 0.); // 0 deg
  
  Float_t cardpar[3];
  cardpar[0]= 61.;
  cardpar[1]= 5.;
  cardpar[2]= 0.1;
  gMC->Gsvolu("FCAR", "BOX ", idtmed[504], cardpar, 3); // PCB Card 
  //alu plate volume definition
  cardpar[1]= 3.5;
  cardpar[2]= 0.05;
  gMC->Gsvolu("FALP", "BOX ", idtmed[508], cardpar, 3); // Alu Plate
  
  
  // central module positioning (FAIA)
  Float_t cardpos[3], aplpos2, stepforcardA=6.89;
  cardpos[0]= 0.;
  cardpos[1]= -0.5;
  cardpos[2]= -62.;
  Float_t aplpos1 = -2.;
  Int_t icard;
  for (icard=0; icard<17; ++icard) {
    cardpos[2]= cardpos[2]+stepforcardA;
    aplpos2 = cardpos[2]+0.15;
    gMC->Gspos("FCAR",icard,"FAIA",cardpos[0],cardpos[1],cardpos[2],idrotm[98],"ONLY"); 
    gMC->Gspos("FALP",icard,"FAIA",cardpos[0],aplpos1,aplpos2,idrotm[98],"ONLY");
    
  }
  
  
  // intermediate module positioning (FAIB)
  Float_t stepforcardB= 7.05;
  cardpos[2]= -70.5;
  for (icard=0; icard<19; ++icard) {
    cardpos[2]= cardpos[2]+stepforcardB;
    aplpos2 = cardpos[2]+0.15;  
    gMC->Gspos("FCAR",icard,"FAIB",cardpos[0],cardpos[1],cardpos[2],idrotm[98],"ONLY"); 
    gMC->Gspos("FALP",icard,"FAIB",cardpos[0],aplpos1,aplpos2,idrotm[98],"ONLY"); 
  }
  
  
  // outer module positioning (FAIC)
  Float_t stepforcardC= 8.45238;
  cardpos[2]= -79.75;
  for (icard=0; icard<17; ++icard) {
    cardpos[2]= cardpos[2]+stepforcardC;
    aplpos2 = cardpos[2]+0.15;
    gMC->Gspos("FCAR",icard,"FAIC",cardpos[0],cardpos[1],cardpos[2],idrotm[98],"ONLY"); 
    gMC->Gspos("FALP",icard,"FAIC",cardpos[0],aplpos1,aplpos2,idrotm[98],"ONLY");
  }
  
  // tube volume definition
  Float_t tubepar[3];
  tubepar[0]= 0.;
  tubepar[1]= 0.4;
  tubepar[2]= 61.;
  gMC->Gsvolu("FTUB", "TUBE", idtmed[516], tubepar, 3); // cooling tubes (steel)
  tubepar[0]= 0.;
  tubepar[1]= 0.35;
  tubepar[2]= 61.;
  gMC->Gsvolu("FITU", "TUBE", idtmed[515], tubepar, 3); // cooling water
  // positioning water tube into the steel one
  gMC->Gspos("FITU",1,"FTUB",0.,0.,0.,0,"ONLY");
  
  
  // rotation matrix
  AliMatrix(idrotm[99], 180., 90., 90., 90., 90., 0.);
  // central module positioning (FAIA)
  Float_t tubepos[3], tdis=0.6;
  tubepos[0]= 0.;
  tubepos[1]= cardpos[1];
  tubepos[2]= -62.+tdis;
  //  tub1pos = 5.;
  Int_t itub;
  for (itub=0; itub<17; ++itub) {
    tubepos[2]= tubepos[2]+stepforcardA;
    gMC->Gspos("FTUB",itub,"FAIA",tubepos[0],tubepos[1],tubepos[2],idrotm[99],
	       "ONLY");
  }
  
  
  // intermediate module positioning (FAIB)
  tubepos[2]= -70.5+tdis;
  for (itub=0; itub<19; ++itub) {
    tubepos[2]= tubepos[2]+stepforcardB;
    gMC->Gspos("FTUB",itub,"FAIB",tubepos[0],tubepos[1],tubepos[2],idrotm[99],
	       "ONLY");
  }
  
  // outer module positioning (FAIC)
  tubepos[2]= -79.75+tdis;
  for (itub=0; itub<17; ++itub) {
    tubepos[2]= tubepos[2]+stepforcardC;
    gMC->Gspos("FTUB",itub,"FAIC",tubepos[0],tubepos[1],tubepos[2],idrotm[99],
	       "ONLY");
  }

}

//_____________________________________________________________________________
void AliTOFv2FHoles::DrawModule() const
{
  //
  // Draw a shaded view of the Time Of Flight version 2
  //
  // Set everything unseen
  gMC->Gsatt("*", "seen", -1);
  // 
  // Set ALIC mother transparent
  gMC->Gsatt("ALIC","SEEN",0);
  //
  // Set the volumes visible
  gMC->Gsatt("ALIC","SEEN",0);

  gMC->Gsatt("FTOA","SEEN",1);
  gMC->Gsatt("FTOB","SEEN",1);
  gMC->Gsatt("FTOC","SEEN",1);
  gMC->Gsatt("FLTA","SEEN",1);
  gMC->Gsatt("FLTB","SEEN",1);
  gMC->Gsatt("FLTC","SEEN",1);
  gMC->Gsatt("FPLA","SEEN",1);
  gMC->Gsatt("FPLB","SEEN",1);
  gMC->Gsatt("FPLC","SEEN",1);
  gMC->Gsatt("FSTR","SEEN",1);
  gMC->Gsatt("FPEA","SEEN",1);
  gMC->Gsatt("FPEB","SEEN",1);
  gMC->Gsatt("FPEC","SEEN",1);
  
  gMC->Gsatt("FLZ1","SEEN",0);
  gMC->Gsatt("FLZ2","SEEN",0);
  gMC->Gsatt("FLZ3","SEEN",0);
  gMC->Gsatt("FLX1","SEEN",0);
  gMC->Gsatt("FLX2","SEEN",0);
  gMC->Gsatt("FLX3","SEEN",0);
  gMC->Gsatt("FPAD","SEEN",0);

  gMC->Gdopt("hide", "on");
  gMC->Gdopt("shad", "on");
  gMC->Gsatt("*", "fill", 7);
  gMC->SetClipBox(".");
  gMC->SetClipBox("*", 0, 1000, -1000, 1000, -1000, 1000);
  gMC->DefaultRange();
  gMC->Gdraw("alic", 40, 30, 0, 12, 9.5, .02, .02);
  gMC->Gdhead(1111, "Time Of Flight");
  gMC->Gdman(18, 4, "MAN");
  gMC->Gdopt("hide","off");
}
//_____________________________________________________________________________
void AliTOFv2FHoles::DrawDetectorModules()
{
//
// Draw a shaded view of the TOF detector version 2
//
 
 AliMC* pMC = AliMC::GetMC();
 
//Set ALIC mother transparent
 pMC->Gsatt("ALIC","SEEN",0);

//
//Set volumes visible
// 
//=====> Level 1
  // Level 1 for TOF volumes
  gMC->Gsatt("B077","seen",0);
 
 
//==========> Level 2
  // Level 2
  gMC->Gsatt("B076","seen",-1); // all B076 sub-levels skipped -
  gMC->Gsatt("B071","seen",0);
  gMC->Gsatt("B074","seen",0);
  gMC->Gsatt("B075","seen",0);
  gMC->Gsatt("B080","seen",0); // B080 does not has sub-level                


  // Level 2 of B071
  gMC->Gsatt("B063","seen",-1); // all B063 sub-levels skipped   -
  gMC->Gsatt("B065","seen",-1); // all B065 sub-levels skipped   -
  gMC->Gsatt("B067","seen",-1); // all B067 sub-levels skipped   -
  gMC->Gsatt("B069","seen",-1); // all B069 sub-levels skipped   -
  gMC->Gsatt("B056","seen",0);  // B056 does not has sub-levels  -
  gMC->Gsatt("B059","seen",-1); // all B059 sub-levels skipped   -
  gMC->Gsatt("B072","seen",-1); // all B072 sub-levels skipped   -
  gMC->Gsatt("BTR1","seen",0);  // BTR1 do not have sub-levels   -
  gMC->Gsatt("BTO1","seen",0);

 
  // Level 2 of B074
  gMC->Gsatt("BTR2","seen",0); // BTR2 does not has sub-levels -
  gMC->Gsatt("BTO2","seen",0);

  // Level 2 of B075
  gMC->Gsatt("BTR3","seen",0); // BTR3 do not have sub-levels -
  gMC->Gsatt("BTO3","seen",0);

// ==================> Level 3
  // Level 3 of B071 / Level 2 of BTO1
  gMC->Gsatt("FTOC","seen",-2);
  gMC->Gsatt("FTOB","seen",-2);
  gMC->Gsatt("FTOA","seen",-2);
 
  // Level 3 of B074 / Level 2 of BTO2
  // -> cfr previous settings
 
  // Level 3 of B075 / Level 2 of BTO3
  // -> cfr previous settings

  gMC->Gdopt("hide","on");
  gMC->Gdopt("shad","on");
  gMC->Gsatt("*", "fill", 5);
  gMC->SetClipBox(".");
  gMC->SetClipBox("*", 0, 1000, 0, 1000, 0, 1000);
  gMC->DefaultRange();
  gMC->Gdraw("alic", 45, 40, 0, 10, 10, .015, .015);
  gMC->Gdhead(1111,"TOF detector V1");
  gMC->Gdman(18, 4, "MAN");
  gMC->Gdopt("hide","off");
}                                 

//_____________________________________________________________________________
void AliTOFv2FHoles::DrawDetectorStrips()
{
//
// Draw a shaded view of the TOF strips for version 2
//
 
 AliMC* pMC = AliMC::GetMC();
 
//Set ALIC mother transparent
 pMC->Gsatt("ALIC","SEEN",0);

//
//Set volumes visible 
//=====> Level 1
  // Level 1 for TOF volumes
  gMC->Gsatt("B077","seen",0);
  
//==========> Level 2
  // Level 2
  gMC->Gsatt("B076","seen",-1); // all B076 sub-levels skipped -
  gMC->Gsatt("B071","seen",0);
  gMC->Gsatt("B074","seen",0);
  gMC->Gsatt("B075","seen",0);
  gMC->Gsatt("B080","seen",0); // B080 does not has sub-level

  // Level 2 of B071
  gMC->Gsatt("B063","seen",-1); // all B063 sub-levels skipped   -
  gMC->Gsatt("B065","seen",-1); // all B065 sub-levels skipped   -
  gMC->Gsatt("B067","seen",-1); // all B067 sub-levels skipped   -
  gMC->Gsatt("B069","seen",-1); // all B069 sub-levels skipped   -
  gMC->Gsatt("B056","seen",0);  // B056 does not has sub-levels  -
  gMC->Gsatt("B059","seen",-1); // all B059 sub-levels skipped   -
  gMC->Gsatt("B072","seen",-1); // all B072 sub-levels skipped   -
  gMC->Gsatt("BTR1","seen",0);  // BTR1 do not have sub-levels   -
  gMC->Gsatt("BTO1","seen",0);

// ==================> Level 3
  // Level 3 of B071 / Level 2 of BTO1
  gMC->Gsatt("FTOC","seen",0);
  gMC->Gsatt("FTOB","seen",0);
  gMC->Gsatt("FTOA","seen",0);
 
  // Level 3 of B074 / Level 2 of BTO2
  // -> cfr previous settings
 
  // Level 3 of B075 / Level 2 of BTO3
  // -> cfr previous settings


// ==========================> Level 4
  // Level 4 of B071 / Level 3 of BTO1 / Level 2 of FTOC
  gMC->Gsatt("FLTC","seen",0);
  // Level 4 of B071 / Level 3 of BTO1 / Level 2 of FTOB
  gMC->Gsatt("FLTB","seen",0);
  // Level 4 of B071 / Level 3 of BTO1 / Level 2 of FTOA
  gMC->Gsatt("FLTA","seen",0);
 
  // Level 4 of B074 / Level 3 of BTO2 / Level 2 of FTOC
  // -> cfr previous settings
  // Level 4 of B074 / Level 3 of BTO2 / Level 2 of FTOB
  // -> cfr previous settings
 
  // Level 4 of B075 / Level 3 of BTO3 / Level 2 of FTOC
  // -> cfr previous settings

//======================================> Level 5
  // Level 5 of B071 / Level 4 of BTO1 / Level 3 of FTOC / Level 2 of FLTC
  gMC->Gsatt("FALC","seen",0); // no children for FALC
  gMC->Gsatt("FSTR","seen",-2);
  gMC->Gsatt("FPEC","seen",0); // no children for FPEC
  gMC->Gsatt("FECC","seen",0); // no children for FECC
  gMC->Gsatt("FWAC","seen",0); // no children for FWAC
  gMC->Gsatt("FAIC","seen",0); // no children for FAIC

  // Level 5 of B071 / Level 4 of BTO1 / Level 3 of FTOB / Level 2 of FLTB
  gMC->Gsatt("FALB","seen",0); // no children for FALB
//-->  gMC->Gsatt("FSTR","seen",-2);


  // -> cfr previous settings
  gMC->Gsatt("FPEB","seen",0); // no children for FPEB
  gMC->Gsatt("FECB","seen",0); // no children for FECB
  gMC->Gsatt("FWAB","seen",0); // no children for FWAB
  gMC->Gsatt("FAIB","seen",0); // no children for FAIB
 
  // Level 5 of B071 / Level 4 of BTO1 / Level 3 of FTOA / Level 2 of FLTA
  gMC->Gsatt("FALA","seen",0); // no children for FALB
//-->  gMC->Gsatt("FSTR","seen",-2);
  // -> cfr previous settings
  gMC->Gsatt("FPEA","seen",0); // no children for FPEA
  gMC->Gsatt("FECA","seen",0); // no children for FECA
  gMC->Gsatt("FWAA","seen",0); // no children for FWAA
  gMC->Gsatt("FAIA","seen",0); // no children for FAIA

  // Level 2 of B074
  gMC->Gsatt("BTR2","seen",0); // BTR2 does not has sub-levels -
  gMC->Gsatt("BTO2","seen",0);

  // Level 2 of B075
  gMC->Gsatt("BTR3","seen",0); // BTR3 do not have sub-levels -
  gMC->Gsatt("BTO3","seen",0);

// for others Level 5, cfr. previous settings

  gMC->Gdopt("hide","on");
  gMC->Gdopt("shad","on");
  gMC->Gsatt("*", "fill", 5);
  gMC->SetClipBox(".");
  gMC->SetClipBox("*", 0, 1000, 0, 1000, 0, 1000);
  gMC->DefaultRange();
  gMC->Gdraw("alic", 45, 40, 0, 10, 10, .015, .015);
  gMC->Gdhead(1111,"TOF Strips V1");
  gMC->Gdman(18, 4, "MAN");
  gMC->Gdopt("hide","off");
}

//_____________________________________________________________________________
void AliTOFv2FHoles::CreateMaterials()
{
  //
  // Define materials for the Time Of Flight
  //
  AliTOF::CreateMaterials();
}
 
//_____________________________________________________________________________
void AliTOFv2FHoles::Init()
{
  //
  // Initialise the detector after the geometry has been defined
  //
  if(fDebug) {   
    printf("%s: **************************************"
           "  TOF  "
           "**************************************\n",ClassName());
    printf("\n%s:   Version 2 of TOF initialing, "
           "TOF with holes for PHOS and RICH \n",ClassName());
  }  

  AliTOF::Init();

  fIdFTOA = gMC->VolId("FTOA");
  fIdFTOB = gMC->VolId("FTOB");
  fIdFTOC = gMC->VolId("FTOC");
  fIdFLTA = gMC->VolId("FLTA");
  fIdFLTB = gMC->VolId("FLTB");
  fIdFLTC = gMC->VolId("FLTC");

  if(fDebug) {
    printf("%s: **************************************"
           "  TOF  "
           "**************************************\n",ClassName());
  }
}
 
//_____________________________________________________________________________
void AliTOFv2FHoles::StepManager()
{
  //
  // Procedure called at each step in the Time Of Flight
  //
  TLorentzVector mom, pos;
  Float_t xm[3],pm[3],xpad[3],ppad[3];
  Float_t hits[13],phi,phid,z;
  Int_t   vol[5];
  Int_t   sector, plate, padx, padz, strip;
  Int_t   copy, padzid, padxid, stripid, i;
  Int_t   *idtmed = fIdtmed->GetArray()-499;
  Float_t incidenceAngle;
  
  if(gMC->GetMedium()==idtmed[513] && 
     gMC->IsTrackEntering() && gMC->TrackCharge()
     && gMC->CurrentVolID(copy)==fIdSens) 
  {    
    // getting information about hit volumes
    
    padzid=gMC->CurrentVolOffID(2,copy);
    padz=copy;  
    
    padxid=gMC->CurrentVolOffID(1,copy);
    padx=copy;  
    
    stripid=gMC->CurrentVolOffID(4,copy);
    strip=copy;  

    gMC->TrackPosition(pos);
    gMC->TrackMomentum(mom);

//    Double_t NormPos=1./pos.Rho();
    Double_t normMom=1./mom.Rho();

//  getting the cohordinates in pad ref system
    xm[0] = (Float_t)pos.X();
    xm[1] = (Float_t)pos.Y();
    xm[2] = (Float_t)pos.Z();

    pm[0] = (Float_t)mom.X()*normMom;
    pm[1] = (Float_t)mom.Y()*normMom;
    pm[2] = (Float_t)mom.Z()*normMom;
 
    gMC->Gmtod(xm,xpad,1);
    gMC->Gmtod(pm,ppad,2);

    incidenceAngle = TMath::ACos(ppad[1])*kRaddeg;

    z = pos[2];

    plate = 0;   

    /* to be changed
    if (TMath::Abs(z) <=  fZlenA*0.5)  plate = 3;
    if (z < (fZlenA*0.5+fZlenB) && 
        z >  fZlenA*0.5)               plate = 4;
    if (z >-(fZlenA*0.5+fZlenB) &&
        z < -fZlenA*0.5)               plate = 2;
    if (z > (fZlenA*0.5+fZlenB))       plate = 5;
    if (z <-(fZlenA*0.5+fZlenB))       plate = 1;
    end to be changed */

    if (TMath::Abs(z) <=  124.*0.5)  plate = 3;
    if (z < (124.*0.5+154.) && 
        z >  124.*0.5)               plate = 4;
    if (z >-(124.*0.5+154.) &&
        z < -124.*0.5)               plate = 2;
    if (z > (124.*0.5+154.))       plate = 5;
    if (z <-(124.*0.5+154.))       plate = 1;


    phi = pos.Phi();
    phid = phi*kRaddeg+180.;
    sector = Int_t (phid/20.);
    sector++;

    for(i=0;i<3;++i) {
      hits[i]   = pos[i];
      hits[i+3] = pm[i];
    }

    hits[6] = mom.Rho();
    hits[7] = pos[3];
    hits[8] = xpad[0];
    hits[9] = xpad[1];
    hits[10]= xpad[2];
    hits[11]= incidenceAngle;
    hits[12]= gMC->Edep();
    
    vol[0]= sector;
    vol[1]= plate;
    vol[2]= strip;
    vol[3]= padx;
    vol[4]= padz;
    
    AddHit(gAlice->CurrentTrack(),vol, hits);
  }
}