[u/mrichter/AliRoot.git] / ITS / AliITSv1.cxx

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  Inner Traking System version 1                                           //
//  This class contains the base procedures for the Inner Tracking System    //
//                                                                           //
// Authors: R. Barbera, A. Morsch.
// version 1.
// Created  1998.
//
//  NOTE: THIS IS THE COARSE pre.TDR geometry of the ITS. THIS WILL NOT WORK
// with the geometry or module classes or any analysis classes. You are 
// strongly encouraged to uses AliITSv5.
//                                                                           //
///////////////////////////////////////////////////////////////////////////////
 
#include <TMath.h>
#include <TRandom.h>
#include <TVector.h>
#include "AliITShit.h"
#include "AliITSv1.h"
#include "AliRun.h"

#include "AliMC.h"
#include "AliConst.h"

ClassImp(AliITSv1)
 
//_____________________________________________________________________________
AliITSv1::AliITSv1() : AliITS() 
{
  //
  // Default constructor for the ITS
  //
}
 
//_____________________________________________________________________________
AliITSv1::AliITSv1(const char *name, const char *title)
  : AliITS(name, title)
{ 
  //
  // Standard constructor for the ITS
  //
}
 
//_____________________________________________________________________________
void AliITSv1::CreateGeometry()
{
  //
  // Create geometry for version 1 of the ITS
  //
  //
  // Create Geometry for ITS version 0
  //
  //
  

  
  Float_t drcer[6] = { 0.,0.,.08,.08,0.,0. };           //CERAMICS THICKNESS
  Float_t drepx[6] = { 0.,0.,0.,0.,.5357,.5357 };       //EPOXY THICKNESS
  Float_t drpla[6] = { 0.,0.,0.,0.,.1786,.1786 };       //PLASTIC THICKNESS
  Float_t dzb[6]   = { 0.,0.,15.,15.,4.,4. };           //LENGTH OF BOXES
  Float_t dphi[6]  = { 72.,72.,72.,72.,50.6,45. };      //COVERED PHI-RANGE FOR LAYERS 1-6
  Float_t rl[6]    = { 3.9,7.6,14.,24.,40.,45. };       //SILICON LAYERS INNER RADIUS
  Float_t drl[6]   = { .755,.755,.809,.809,.7,.7 };     //THICKNESS OF LAYERS (in % radiation length)
  Float_t dzl[6]   = { 12.67,16.91,20.85,29.15,45.11,50.975 };//HALF LENGTH OF LAYERS
  Float_t drpcb[6] = { 0.,0.,.06,.06,0.,0. };           //PCB THICKNESS
  Float_t drcu[6]  = { 0.,0.,.0504,.0504,.0357,.0357 }; //COPPER THICKNESS
  Float_t drsi[6]  = { 0.,0.,.006,.006,.3571,.3571 };   //SILICON THICKNESS

  Float_t drca = 0, dzfc;
  Int_t i, nsec;
  Float_t rend, drca_tpc, dzco, zend, dits[3], rlim, drsu, zmax;
  Float_t zpos, dzco1, dzco2;
  Float_t drcac[6], acone, dphii;
  Float_t pcits[15], xltpc;
  Float_t rzcone, rstep, r0, z0, acable, fp, dz, zi, ri;
  Int_t idrotm[399];
  Float_t dgh[15];
  
  Int_t *idtmed = fIdtmed->GetArray()-199;
  
  //     CONVERT INTO CM (RL(SI)=9.36 CM) 
  for (i = 0; i < 6; ++i) {
    drl[i] = drl[i] / 100. * 9.36;
  }
  
  //     SUPPORT ENDPLANE THICKNESS 
  drsu = 2.*0.06+1./20;  // 1./20. is 1 cm of honeycomb (1/20 carbon density);
  
  //     CONE BELOW TPC 
  
  drca_tpc = 1.2/4.;
  
  //     CABLE THICKNESS (CONICAL CABLES CONNECTING THE LAYERS) 

  
  //     ITS CONE ANGLE 
  
  acone  = 45.;
  acone *= kDegrad;
  
  //     CONE RADIUS AT 1ST LAYER 
  
  rzcone = 30.;
  
  //     FIELD CAGE HALF LENGTH 
  
  dzfc  = 64.5;
  rlim  = 48.;
  zmax  = 80.;
  xltpc = 275.;
  
  
  //     PARAMETERS FOR SMALL (1/2) ITS 

  for (i = 0; i < 6; ++i) {
    dzl[i] /= 2.;
    dzb[i] /= 2.;
  }
  drca     /= 2.;
  acone    /= 2.;
  drca_tpc /= 2.;
  rzcone   /= 2.;
  dzfc     /= 2.;
  zmax     /= 2.;
  xltpc    /= 2.;
  acable    = 15.;
  
  
  
  //     EQUAL DISTRIBUTION INTO THE 6 LAYERS 
  rstep = drca_tpc / 6.;
  for (i = 0; i < 6; ++i) {
    drcac[i] = (i+1) * rstep;
  }

  //     NUMBER OF PHI SECTORS 
  
  nsec = 5;
  
  //     PACK IN PHI AS MUCH AS POSSIBLE 
  //     NOW PACK USING THICKNESS 
  
  for (i = 0; i < 6; ++i) {
    
//     PACKING FACTOR 
    fp = rl[5] / rl[i];
    
    //      PHI-PACKING NOT SUFFICIENT ? 
    
    if (dphi[i]/45 < fp) {
      drcac[i] = drcac[i] * fp * 45/dphi[i];
    }
  }
  
  
  // --- Define ghost volume containing the six layers and fill it with air 
  
  dgh[0] = 3.5;
  dgh[1] = 50.;
  dgh[2] = zmax;
  gMC->Gsvolu("ITSV", "TUBE", idtmed[275], dgh, 3);
  
  // --- Place the ghost volume in its mother volume (ALIC) and make it 
  //     invisible 
  
  gMC->Gspos("ITSV", 1, "ALIC", 0., 0., 0., 0, "ONLY");
  gMC->Gsatt("ITSV", "SEEN", 0);
  
  //     ITS LAYERS (SILICON) 
  
  dits[0] = rl[0];
  dits[1] = rl[0] + drl[0];
  dits[2] = dzl[0];
  gMC->Gsvolu("ITS1", "TUBE", idtmed[199], dits, 3);
  gMC->Gspos("ITS1", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  
  dits[0] = rl[1];
  dits[1] = rl[1] + drl[1];
  dits[2] = dzl[1];
  gMC->Gsvolu("ITS2", "TUBE", idtmed[199], dits, 3);
  gMC->Gspos("ITS2", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  
  dits[0] = rl[2];
  dits[1] = rl[2] + drl[2];
  dits[2] = dzl[2];
  gMC->Gsvolu("ITS3", "TUBE", idtmed[224], dits, 3);
  gMC->Gspos("ITS3", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  
  dits[0] = rl[3];
  dits[1] = rl[3] + drl[3];
  dits[2] = dzl[3];
  gMC->Gsvolu("ITS4", "TUBE", idtmed[224], dits, 3);
  gMC->Gspos("ITS4", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  
  dits[0] = rl[4];
  dits[1] = rl[4] + drl[4];
  dits[2] = dzl[4];
  gMC->Gsvolu("ITS5", "TUBE", idtmed[249], dits, 3);
  gMC->Gspos("ITS5", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  
  dits[0] = rl[5];
  dits[1] = rl[5] + drl[5];
  dits[2] = dzl[5];
  gMC->Gsvolu("ITS6", "TUBE", idtmed[249], dits, 3);
  gMC->Gspos("ITS6", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  
  //    ELECTRONICS BOXES 
  
  //     PCB (layer #3 and #4) 
  
  gMC->Gsvolu("IPCB", "TUBE", idtmed[233], dits, 0);
  for (i = 2; i < 4; ++i) {
    dits[0] = rl[i];
    dits[1] = dits[0] + drpcb[i];
    dits[2] = dzb[i] / 2.;
    zpos = dzl[i] + dits[2];
    gMC->Gsposp("IPCB", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    gMC->Gsposp("IPCB", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     COPPER (layer #3 and #4) 
  
  gMC->Gsvolu("ICO2", "TUBE", idtmed[234], dits, 0);
  for (i = 2; i < 4; ++i) {
    dits[0] = rl[i] + drpcb[i];
    dits[1] = dits[0] + drcu[i];
    dits[2] = dzb[i] / 2.;
    zpos = dzl[i] + dits[2];
    gMC->Gsposp("ICO2", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    gMC->Gsposp("ICO2", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     CERAMICS (layer #3 and #4) 
  
  gMC->Gsvolu("ICER", "TUBE", idtmed[235], dits, 0);
  for (i = 2; i < 4; ++i) {
    dits[0] = rl[i] + drpcb[i] + drcu[i];
    dits[1] = dits[0] + drcer[i];
    dits[2] = dzb[i] / 2.;
    zpos = dzl[i] + dits[2];
    gMC->Gsposp("ICER", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    gMC->Gsposp("ICER", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     SILICON (layer #3 and #4) 
  
  gMC->Gsvolu("ISI2", "TUBE", idtmed[226], dits, 0);
  for (i = 2; i < 4; ++i) {
    dits[0] = rl[i] + drpcb[i] + drcu[i] + drcer[i];
    dits[1] = dits[0] + drsi[i];
    dits[2] = dzb[i] / 2.;
    zpos = dzl[i] + dits[2];
    gMC->Gsposp("ISI2", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    gMC->Gsposp("ISI2", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     PLASTIC (G10FR4) (layer #5 and #6) 
  
  gMC->Gsvolu("IPLA", "TUBE", idtmed[262], dits, 0);
  for (i = 4; i < 6; ++i) {
    dits[0] = rl[i];
    dits[1] = dits[0] + drpla[i];
    dits[2] = dzb[i] / 2.;
    zpos = dzl[i] + dits[2];
    gMC->Gsposp("IPLA", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    gMC->Gsposp("IPLA", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     COPPER (layer #5 and #6) 
  
  gMC->Gsvolu("ICO3", "TUBE", idtmed[259], dits, 0);
  for (i = 4; i < 6; ++i) {
    dits[0] = rl[i] + drpla[i];
    dits[1] = dits[0] + drcu[i];
    dits[2] = dzb[i] / 2.;
    zpos = dzl[i] + dits[2];
    gMC->Gsposp("ICO3", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    gMC->Gsposp("ICO3", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     EPOXY (layer #5 and #6) 
  
  gMC->Gsvolu("IEPX", "TUBE", idtmed[262], dits, 0);
  for (i = 4; i < 6; ++i) {
    dits[0] = rl[i] + drpla[i] + drcu[i];
    dits[1] = dits[0] + drepx[i];
    dits[2] = dzb[i] / 2.;
    zpos = dzl[i] + dits[2];
    gMC->Gsposp("IEPX", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    gMC->Gsposp("IEPX", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     SILICON (layer #5 and #6) 
  
  gMC->Gsvolu("ISI3", "TUBE", idtmed[251], dits, 0);
  for (i = 4; i < 6; ++i) {
    dits[0] = rl[i] + drpla[i] + drcu[i] + drepx[i];
    dits[1] = dits[0] + drsi[i];
    dits[2] = dzb[i] / 2.;
    zpos = dzl[i] + dits[2];
    gMC->Gsposp("ISI3", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    gMC->Gsposp("ISI3", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //    SUPPORT 
  
  gMC->Gsvolu("ISUP", "TUBE", idtmed[274], dits, 0);
  for (i = 0; i < 6; ++i) {
    dits[0] = rl[i];
    if (i < 5) dits[1] = rl[i];
    else       dits[1] = rlim;
    dits[2] = drsu / 2.;
    zpos = dzl[i] + dzb[i] + dits[2];
    gMC->Gsposp("ISUP", i+1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    gMC->Gsposp("ISUP", i+7, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  // CABLES (HORIZONTAL) 
  
  gMC->Gsvolu("ICHO", "TUBE", idtmed[278], dits, 0);
  for (i = 0; i < 6; ++i) {
    dits[0] = rl[i];
    dits[1] = dits[0] + drca;
    dits[2] = (rzcone + TMath::Tan(acone) * (rl[i] - rl[0]) - (dzl[i]+ dzb[i] + drsu)) / 2.;
    zpos = dzl[i - 1] + dzb[i] + drsu + dits[2];
    gMC->Gsposp("ICHO", i+1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    gMC->Gsposp("ICHO", i+7, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  //    DEFINE A CONICAL GHOST VOLUME FOR THE PHI SEGMENTATION 
  pcits[0] = 0.;
  pcits[1] = 360.;
  pcits[2] = 2.;
  pcits[3] = rzcone;
  pcits[4] = 3.5;
  pcits[5] = rl[0];
  pcits[6] = pcits[3] + TMath::Tan(acone) * (rlim - rl[0]);
  pcits[7] = rlim - rl[0] + 3.5;
  pcits[8] = rlim;
  gMC->Gsvolu("ICMO", "PCON", idtmed[275], pcits, 9);
  AliMatrix(idrotm[200], 90., 0., 90., 90., 180., 0.);
  gMC->Gspos("ICMO", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  gMC->Gspos("ICMO", 2, "ITSV", 0., 0., 0., idrotm[200], "ONLY");
  
  //     DIVIDE INTO NSEC PHI-SECTIONS 
  
  gMC->Gsdvn("ICMD", "ICMO", nsec, 2);
  gMC->Gsatt("ICMO", "SEEN", 0);
  gMC->Gsatt("ICMD", "SEEN", 0);
  
  //     CONICAL CABLES 
  
  pcits[2] = 2.;
  gMC->Gsvolu("ICCO", "PCON", idtmed[278], pcits, 0);
  for (i = 1; i < 6; ++i) {
    pcits[0] = -dphi[i] / 2.;
    pcits[1] = dphi[i];
    if (i < 5) {
      dzco = TMath::Tan(acone) * (rl[i+1] - rl[i]);
    } else {
      dzco1 = zmax - (rzcone + TMath::Tan(acone) * (rl[5] - rl[0])) -2.;
      dzco2 = (rlim - rl[5]) * TMath::Tan(acone);
      if (rl[5] + dzco1 / TMath::Tan(acone) < rlim) {
	dzco = dzco1;
      } else {
	dzco = dzco2;
      }
    }
    pcits[3] = rzcone + TMath::Tan(acone) * (rl[i] - rl[0]);
    pcits[4] = rl[i] - drcac[i] / TMath::Sin(acone);
    pcits[5] = rl[i];
    pcits[6] = pcits[3] + dzco;
    pcits[7] = rl[i] + dzco / TMath::Tan(acone) - drcac[i] / TMath::Sin(acone);
    pcits[8] = rl[i] + dzco / TMath::Tan(acone);
    
    gMC->Gsposp("ICCO", i, "ICMD", 0., 0., 0., 0, "ONLY", pcits, 9);
    
  }
  zend = pcits[6];
  rend = pcits[8];
  
  //  CONICAL CABLES BELOW TPC 
  
  //    DEFINE A CONICAL GHOST VOLUME FOR THE PHI SEGMENTATION 
  pcits[0] = 0.;
  pcits[1] = 360.;
  pcits[2] = 2.;
  pcits[3] = zend;
  pcits[5] = rend;
  pcits[4] = pcits[5] - drca_tpc;
  pcits[6] = xltpc;
  pcits[8] = pcits[4] + (pcits[6] - pcits[3]) * TMath::Tan(acable * kDegrad);
  pcits[7] = pcits[8] - drca_tpc;
  AliMatrix(idrotm[200], 90., 0., 90., 90., 180., 0.);
  gMC->Gsvolu("ICCM", "PCON", idtmed[275], pcits, 9);
  gMC->Gspos("ICCM", 1, "ALIC", 0., 0., 0., 0, "ONLY");
  gMC->Gspos("ICCM", 2, "ALIC", 0., 0., 0., idrotm[200], "ONLY");
  gMC->Gsdvn("ITMD", "ICCM", nsec, 2);
  gMC->Gsatt("ITMD", "SEEN", 0);
  gMC->Gsatt("ICCM", "SEEN", 0);
  
  //     NOW PLACE SEGMENTS WITH DECREASING PHI SEGMENTS INTO THE 
  //     GHOST-VOLUME 
  
  pcits[2] = 2.;
  gMC->Gsvolu("ITTT", "PCON", idtmed[278], pcits, 0);
  r0 = rend;
  z0 = zend;
  dz = (xltpc - zend) / 9.;
  for (i = 0; i < 9; ++i) {
    zi = z0 + i*dz + dz / 2.;
    ri = r0 + (zi - z0) * TMath::Tan(acable * kDegrad);
    dphii = dphi[5] * r0 / ri;
    pcits[0] = -dphii / 2.;
    pcits[1] = dphii;
    pcits[3] = zi - dz / 2.;
    pcits[5] = r0 + (pcits[3] - z0) * TMath::Tan(acable * kDegrad);
    pcits[4] = pcits[5] - drca_tpc;
    pcits[6] = zi + dz / 2.;
    pcits[8] = r0 + (pcits[6] - z0) * TMath::Tan(acable * kDegrad);
    pcits[7] = pcits[8] - drca_tpc;
    
    gMC->Gsposp("ITTT", i+1, "ITMD", 0., 0., 0., 0, "ONLY", pcits, 9);
  }
  
  // --- Outputs the geometry tree in the EUCLID/CAD format 
  
  if (fEuclidOut) {
    gMC->WriteEuclid("ITSgeometry", "ITSV", 1, 5);
  }
}

//_____________________________________________________________________________
void AliITSv1::CreateMaterials()
{
  //
  // Create the materials for ITS
  //
  AliITS::CreateMaterials();
}

//_____________________________________________________________________________
void AliITSv1::Init()
{
  //
  // Initialise the ITS after it has been built
  //
  AliITS::Init();
  fMajorVersion = 1;
  fMinorVersion = 0;
}  
 
//_____________________________________________________________________________
void AliITSv1::DrawModule()
{ 
  //
  // Draw a shaded view of the FMD version 1
  //

  
  // Set everything unseen
  gMC->Gsatt("*", "seen", -1);
  // 
  // Set ALIC mother visible
  gMC->Gsatt("ALIC","SEEN",0);
  //
  // Set the volumes visible
  gMC->Gsatt("ITSV","SEEN",0);
  gMC->Gsatt("ITS1","SEEN",1);
  gMC->Gsatt("ITS2","SEEN",1);
  gMC->Gsatt("ITS3","SEEN",1);
  gMC->Gsatt("ITS4","SEEN",1);
  gMC->Gsatt("ITS5","SEEN",1);
  gMC->Gsatt("ITS6","SEEN",1);

  gMC->Gsatt("IPCB","SEEN",1);
  gMC->Gsatt("ICO2","SEEN",1);
  gMC->Gsatt("ICER","SEEN",0);
  gMC->Gsatt("ISI2","SEEN",0);
  gMC->Gsatt("IPLA","SEEN",0);
  gMC->Gsatt("ICO3","SEEN",0);
  gMC->Gsatt("IEPX","SEEN",0);
  gMC->Gsatt("ISI3","SEEN",1);
  gMC->Gsatt("ISUP","SEEN",0);
  gMC->Gsatt("ICHO","SEEN",0);
  gMC->Gsatt("ICMO","SEEN",0);
  gMC->Gsatt("ICMD","SEEN",0);
  gMC->Gsatt("ICCO","SEEN",1);
  gMC->Gsatt("ICCM","SEEN",0);
  gMC->Gsatt("ITMD","SEEN",0);
  gMC->Gsatt("ITTT","SEEN",1);

  //
  gMC->Gdopt("hide", "on");
  gMC->Gdopt("shad", "on");
  gMC->Gsatt("*", "fill", 7);
  gMC->SetClipBox(".");
  gMC->SetClipBox("*", 0, 300, -300, 300, -300, 300);
  gMC->DefaultRange();
  gMC->Gdraw("alic", 40, 30, 0, 11, 10, .07, .07);
  gMC->Gdhead(1111, "Inner Tracking System Version 1");
  gMC->Gdman(17, 6, "MAN");
}

//_____________________________________________________________________________
void AliITSv1::StepManager()
{ 
  //
  // Called at every step in the ITS
  //
  Int_t         copy, id;
  Float_t       hits[8];
  Int_t         vol[4];
  TLorentzVector position, momentum;
  TClonesArray &lhits = *fHits;
  //
  // Track status
  vol[3] = 0;
  if(gMC->IsTrackInside())      vol[3] +=  1;
  if(gMC->IsTrackEntering())    vol[3] +=  2;
  if(gMC->IsTrackExiting())     vol[3] +=  4;
  if(gMC->IsTrackOut())         vol[3] +=  8;
  if(gMC->IsTrackDisappeared()) vol[3] += 16;
  if(gMC->IsTrackStop())        vol[3] += 32;
  if(gMC->IsTrackAlive())       vol[3] += 64;
  //
  // Fill hit structure.
  if(gMC->TrackCharge() && gMC->Edep()) {
    //
    // Only entering charged tracks
    if((id=gMC->CurrentVolID(copy))==fIdSens[0]) {  
      vol[0]=1;
      id=gMC->CurrentVolOffID(1,copy);      
      vol[1]=copy;
      id=gMC->CurrentVolOffID(2,copy);
      vol[2]=copy;                       
    } else if(id==fIdSens[1]) {
      vol[0]=2;
      id=gMC->CurrentVolOffID(1,copy);       
      vol[1]=copy;
      id=gMC->CurrentVolOffID(2,copy);
      vol[2]=copy;                    
    } else if(id==fIdSens[2]) {
      vol[0]=3;
      vol[1]=copy;
      id=gMC->CurrentVolOffID(1,copy);
      vol[2]=copy;             
    } else if(id==fIdSens[3]) {
      vol[0]=4;
      vol[1]=copy;
      id=gMC->CurrentVolOffID(1,copy);
      vol[2]=copy;                  
    } else if(id==fIdSens[4]) {
      vol[0]=5;
      vol[1]=copy;
      id=gMC->CurrentVolOffID(1,copy);
      vol[2]=copy;               
    } else if(id==fIdSens[5]) {
      vol[0]=6;
      vol[1]=copy;
      id=gMC->CurrentVolOffID(1,copy);
      vol[2]=copy;                      
    } else return;
    gMC->TrackPosition(position);
    gMC->TrackMomentum(momentum);
    hits[0]=position[0];
    hits[1]=position[1];
    hits[2]=position[2];          
    hits[3]=momentum[0];
    hits[4]=momentum[1];
    hits[5]=momentum[2];
    hits[6]=gMC->Edep();
    hits[7]=gMC->TrackTime();
    new(lhits[fNhits++]) AliITShit(fIshunt,gAlice->CurrentTrack(),vol,hits);
  }      
}
Commit	Line	Data
fe4da5cc	1	///////////////////////////////////////////////////////////////////////////////
	2	// //
	3	// Inner Traking System version 1 //
58005f18	4	// This class contains the base procedures for the Inner Tracking System //
fe4da5cc	5	// //
58005f18	6	// Authors: R. Barbera, A. Morsch.
	7	// version 1.
	8	// Created 1998.
	9	//
	10	// NOTE: THIS IS THE COARSE pre.TDR geometry of the ITS. THIS WILL NOT WORK
	11	// with the geometry or module classes or any analysis classes. You are
	12	// strongly encouraged to uses AliITSv5.
fe4da5cc	13	// //
	14	///////////////////////////////////////////////////////////////////////////////
	15
	16	#include <TMath.h>
	17	#include <TRandom.h>
	18	#include <TVector.h>
58005f18	19	#include "AliITShit.h"
fe4da5cc	20	#include "AliITSv1.h"
	21	#include "AliRun.h"
	22
	23	#include "AliMC.h"
	24	#include "AliConst.h"
	25
	26	ClassImp(AliITSv1)
	27
	28	//_____________________________________________________________________________
	29	AliITSv1::AliITSv1() : AliITS()
	30	{
	31	//
	32	// Default constructor for the ITS
	33	//
	34	}
	35
	36	//_____________________________________________________________________________
	37	AliITSv1::AliITSv1(const char name, const char title)
	38	: AliITS(name, title)
	39	{
	40	//
	41	// Standard constructor for the ITS
	42	//
	43	}
	44
	45	//_____________________________________________________________________________
	46	void AliITSv1::CreateGeometry()
	47	{
	48	//
	49	// Create geometry for version 1 of the ITS
	50	//
	51	//
	52	// Create Geometry for ITS version 0
	53	//
58005f18	54	//
fe4da5cc	55
fe4da5cc	56
fe4da5cc	57
	58	Float_t drcer[6] = { 0.,0.,.08,.08,0.,0. }; //CERAMICS THICKNESS
	59	Float_t drepx[6] = { 0.,0.,0.,0.,.5357,.5357 }; //EPOXY THICKNESS
	60	Float_t drpla[6] = { 0.,0.,0.,0.,.1786,.1786 }; //PLASTIC THICKNESS
	61	Float_t dzb[6] = { 0.,0.,15.,15.,4.,4. }; //LENGTH OF BOXES
	62	Float_t dphi[6] = { 72.,72.,72.,72.,50.6,45. }; //COVERED PHI-RANGE FOR LAYERS 1-6
	63	Float_t rl[6] = { 3.9,7.6,14.,24.,40.,45. }; //SILICON LAYERS INNER RADIUS
	64	Float_t drl[6] = { .755,.755,.809,.809,.7,.7 }; //THICKNESS OF LAYERS (in % radiation length)
	65	Float_t dzl[6] = { 12.67,16.91,20.85,29.15,45.11,50.975 };//HALF LENGTH OF LAYERS
	66	Float_t drpcb[6] = { 0.,0.,.06,.06,0.,0. }; //PCB THICKNESS
	67	Float_t drcu[6] = { 0.,0.,.0504,.0504,.0357,.0357 }; //COPPER THICKNESS
	68	Float_t drsi[6] = { 0.,0.,.006,.006,.3571,.3571 }; //SILICON THICKNESS
	69
	70	Float_t drca = 0, dzfc;
	71	Int_t i, nsec;
	72	Float_t rend, drca_tpc, dzco, zend, dits[3], rlim, drsu, zmax;
	73	Float_t zpos, dzco1, dzco2;
	74	Float_t drcac[6], acone, dphii;
	75	Float_t pcits[15], xltpc;
	76	Float_t rzcone, rstep, r0, z0, acable, fp, dz, zi, ri;
	77	Int_t idrotm[399];
	78	Float_t dgh[15];
	79
ad51aeb0	80	Int_t *idtmed = fIdtmed->GetArray()-199;
fe4da5cc	81
	82	// CONVERT INTO CM (RL(SI)=9.36 CM)
	83	for (i = 0; i < 6; ++i) {
	84	drl[i] = drl[i] / 100. * 9.36;
	85	}
	86
	87	// SUPPORT ENDPLANE THICKNESS
	88	drsu = 2.*0.06+1./20; // 1./20. is 1 cm of honeycomb (1/20 carbon density);
	89
	90	// CONE BELOW TPC
	91
	92	drca_tpc = 1.2/4.;
	93
	94	// CABLE THICKNESS (CONICAL CABLES CONNECTING THE LAYERS)
	95
	96
	97	// ITS CONE ANGLE
	98
	99	acone = 45.;
	100	acone *= kDegrad;
	101
	102	// CONE RADIUS AT 1ST LAYER
	103
	104	rzcone = 30.;
	105
	106	// FIELD CAGE HALF LENGTH
	107
	108	dzfc = 64.5;
	109	rlim = 48.;
	110	zmax = 80.;
	111	xltpc = 275.;
	112
	113
	114	// PARAMETERS FOR SMALL (1/2) ITS
	115
	116	for (i = 0; i < 6; ++i) {
	117	dzl[i] /= 2.;
	118	dzb[i] /= 2.;
	119	}
	120	drca /= 2.;
	121	acone /= 2.;
	122	drca_tpc /= 2.;
	123	rzcone /= 2.;
	124	dzfc /= 2.;
	125	zmax /= 2.;
	126	xltpc /= 2.;
	127	acable = 15.;
	128
	129
	130
	131	// EQUAL DISTRIBUTION INTO THE 6 LAYERS
	132	rstep = drca_tpc / 6.;
	133	for (i = 0; i < 6; ++i) {
	134	drcac[i] = (i+1) * rstep;
	135	}
	136
	137	// NUMBER OF PHI SECTORS
	138
	139	nsec = 5;
	140
	141	// PACK IN PHI AS MUCH AS POSSIBLE
	142	// NOW PACK USING THICKNESS
	143
	144	for (i = 0; i < 6; ++i) {
145
146	// PACKING FACTOR
147	fp = rl[5] / rl[i];
148
149	// PHI-PACKING NOT SUFFICIENT ?
150
151	if (dphi[i]/45 < fp) {
152	drcac[i] = drcac[i] * fp * 45/dphi[i];
153	}
154	}
155
156
157	// --- Define ghost volume containing the six layers and fill it with air
158
159	dgh[0] = 3.5;
160	dgh[1] = 50.;
161	dgh[2] = zmax;
cfce8870	162	gMC->Gsvolu("ITSV", "TUBE", idtmed[275], dgh, 3);
fe4da5cc	163
	164	// --- Place the ghost volume in its mother volume (ALIC) and make it
	165	// invisible
	166
cfce8870	167	gMC->Gspos("ITSV", 1, "ALIC", 0., 0., 0., 0, "ONLY");
cfce8870	168	gMC->Gsatt("ITSV", "SEEN", 0);
fe4da5cc	169
	170	// ITS LAYERS (SILICON)
	171
	172	dits[0] = rl[0];
	173	dits[1] = rl[0] + drl[0];
	174	dits[2] = dzl[0];
cfce8870	175	gMC->Gsvolu("ITS1", "TUBE", idtmed[199], dits, 3);
cfce8870	176	gMC->Gspos("ITS1", 1, "ITSV", 0., 0., 0., 0, "ONLY");
fe4da5cc	177
	178	dits[0] = rl[1];
	179	dits[1] = rl[1] + drl[1];
	180	dits[2] = dzl[1];
cfce8870	181	gMC->Gsvolu("ITS2", "TUBE", idtmed[199], dits, 3);
cfce8870	182	gMC->Gspos("ITS2", 1, "ITSV", 0., 0., 0., 0, "ONLY");
fe4da5cc	183
	184	dits[0] = rl[2];
	185	dits[1] = rl[2] + drl[2];
	186	dits[2] = dzl[2];
cfce8870	187	gMC->Gsvolu("ITS3", "TUBE", idtmed[224], dits, 3);
cfce8870	188	gMC->Gspos("ITS3", 1, "ITSV", 0., 0., 0., 0, "ONLY");
fe4da5cc	189
	190	dits[0] = rl[3];
	191	dits[1] = rl[3] + drl[3];
	192	dits[2] = dzl[3];
cfce8870	193	gMC->Gsvolu("ITS4", "TUBE", idtmed[224], dits, 3);
cfce8870	194	gMC->Gspos("ITS4", 1, "ITSV", 0., 0., 0., 0, "ONLY");
fe4da5cc	195
	196	dits[0] = rl[4];
	197	dits[1] = rl[4] + drl[4];
	198	dits[2] = dzl[4];
cfce8870	199	gMC->Gsvolu("ITS5", "TUBE", idtmed[249], dits, 3);
cfce8870	200	gMC->Gspos("ITS5", 1, "ITSV", 0., 0., 0., 0, "ONLY");
fe4da5cc	201
	202	dits[0] = rl[5];
	203	dits[1] = rl[5] + drl[5];
	204	dits[2] = dzl[5];
cfce8870	205	gMC->Gsvolu("ITS6", "TUBE", idtmed[249], dits, 3);
cfce8870	206	gMC->Gspos("ITS6", 1, "ITSV", 0., 0., 0., 0, "ONLY");
fe4da5cc	207
	208	// ELECTRONICS BOXES
	209
	210	// PCB (layer #3 and #4)
	211
cfce8870	212	gMC->Gsvolu("IPCB", "TUBE", idtmed[233], dits, 0);
fe4da5cc	213	for (i = 2; i < 4; ++i) {
	214	dits[0] = rl[i];
	215	dits[1] = dits[0] + drpcb[i];
	216	dits[2] = dzb[i] / 2.;
	217	zpos = dzl[i] + dits[2];
cfce8870	218	gMC->Gsposp("IPCB", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
cfce8870	219	gMC->Gsposp("IPCB", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
fe4da5cc	220	}
	221
	222	// COPPER (layer #3 and #4)
	223
cfce8870	224	gMC->Gsvolu("ICO2", "TUBE", idtmed[234], dits, 0);
fe4da5cc	225	for (i = 2; i < 4; ++i) {
	226	dits[0] = rl[i] + drpcb[i];
	227	dits[1] = dits[0] + drcu[i];
	228	dits[2] = dzb[i] / 2.;
	229	zpos = dzl[i] + dits[2];
cfce8870	230	gMC->Gsposp("ICO2", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
cfce8870	231	gMC->Gsposp("ICO2", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
fe4da5cc	232	}
	233
	234	// CERAMICS (layer #3 and #4)
	235
cfce8870	236	gMC->Gsvolu("ICER", "TUBE", idtmed[235], dits, 0);
fe4da5cc	237	for (i = 2; i < 4; ++i) {
	238	dits[0] = rl[i] + drpcb[i] + drcu[i];
	239	dits[1] = dits[0] + drcer[i];
	240	dits[2] = dzb[i] / 2.;
	241	zpos = dzl[i] + dits[2];
cfce8870	242	gMC->Gsposp("ICER", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
cfce8870	243	gMC->Gsposp("ICER", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
fe4da5cc	244	}
	245
	246	// SILICON (layer #3 and #4)
	247
cfce8870	248	gMC->Gsvolu("ISI2", "TUBE", idtmed[226], dits, 0);
fe4da5cc	249	for (i = 2; i < 4; ++i) {
	250	dits[0] = rl[i] + drpcb[i] + drcu[i] + drcer[i];
	251	dits[1] = dits[0] + drsi[i];
	252	dits[2] = dzb[i] / 2.;
	253	zpos = dzl[i] + dits[2];
cfce8870	254	gMC->Gsposp("ISI2", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
cfce8870	255	gMC->Gsposp("ISI2", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
fe4da5cc	256	}
	257
	258	// PLASTIC (G10FR4) (layer #5 and #6)
	259
cfce8870	260	gMC->Gsvolu("IPLA", "TUBE", idtmed[262], dits, 0);
fe4da5cc	261	for (i = 4; i < 6; ++i) {
	262	dits[0] = rl[i];
	263	dits[1] = dits[0] + drpla[i];
	264	dits[2] = dzb[i] / 2.;
	265	zpos = dzl[i] + dits[2];
cfce8870	266	gMC->Gsposp("IPLA", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
cfce8870	267	gMC->Gsposp("IPLA", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
fe4da5cc	268	}
	269
	270	// COPPER (layer #5 and #6)
	271
cfce8870	272	gMC->Gsvolu("ICO3", "TUBE", idtmed[259], dits, 0);
fe4da5cc	273	for (i = 4; i < 6; ++i) {
	274	dits[0] = rl[i] + drpla[i];
	275	dits[1] = dits[0] + drcu[i];
	276	dits[2] = dzb[i] / 2.;
	277	zpos = dzl[i] + dits[2];
cfce8870	278	gMC->Gsposp("ICO3", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
cfce8870	279	gMC->Gsposp("ICO3", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
fe4da5cc	280	}
	281
	282	// EPOXY (layer #5 and #6)
	283
cfce8870	284	gMC->Gsvolu("IEPX", "TUBE", idtmed[262], dits, 0);
fe4da5cc	285	for (i = 4; i < 6; ++i) {
	286	dits[0] = rl[i] + drpla[i] + drcu[i];
	287	dits[1] = dits[0] + drepx[i];
	288	dits[2] = dzb[i] / 2.;
	289	zpos = dzl[i] + dits[2];
cfce8870	290	gMC->Gsposp("IEPX", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
cfce8870	291	gMC->Gsposp("IEPX", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
fe4da5cc	292	}
	293
	294	// SILICON (layer #5 and #6)
	295
cfce8870	296	gMC->Gsvolu("ISI3", "TUBE", idtmed[251], dits, 0);
fe4da5cc	297	for (i = 4; i < 6; ++i) {
	298	dits[0] = rl[i] + drpla[i] + drcu[i] + drepx[i];
	299	dits[1] = dits[0] + drsi[i];
	300	dits[2] = dzb[i] / 2.;
	301	zpos = dzl[i] + dits[2];
cfce8870	302	gMC->Gsposp("ISI3", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
cfce8870	303	gMC->Gsposp("ISI3", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
fe4da5cc	304	}
	305
	306	// SUPPORT
	307
cfce8870	308	gMC->Gsvolu("ISUP", "TUBE", idtmed[274], dits, 0);
fe4da5cc	309	for (i = 0; i < 6; ++i) {
	310	dits[0] = rl[i];
	311	if (i < 5) dits[1] = rl[i];
	312	else dits[1] = rlim;
	313	dits[2] = drsu / 2.;
	314	zpos = dzl[i] + dzb[i] + dits[2];
cfce8870	315	gMC->Gsposp("ISUP", i+1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
cfce8870	316	gMC->Gsposp("ISUP", i+7, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
fe4da5cc	317	}
	318
	319	// CABLES (HORIZONTAL)
	320
cfce8870	321	gMC->Gsvolu("ICHO", "TUBE", idtmed[278], dits, 0);
fe4da5cc	322	for (i = 0; i < 6; ++i) {
	323	dits[0] = rl[i];
	324	dits[1] = dits[0] + drca;
	325	dits[2] = (rzcone + TMath::Tan(acone) * (rl[i] - rl[0]) - (dzl[i]+ dzb[i] + drsu)) / 2.;
	326	zpos = dzl[i - 1] + dzb[i] + drsu + dits[2];
cfce8870	327	gMC->Gsposp("ICHO", i+1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
cfce8870	328	gMC->Gsposp("ICHO", i+7, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
fe4da5cc	329	}
	330	// DEFINE A CONICAL GHOST VOLUME FOR THE PHI SEGMENTATION
	331	pcits[0] = 0.;
	332	pcits[1] = 360.;
	333	pcits[2] = 2.;
	334	pcits[3] = rzcone;
	335	pcits[4] = 3.5;
	336	pcits[5] = rl[0];
	337	pcits[6] = pcits[3] + TMath::Tan(acone) * (rlim - rl[0]);
	338	pcits[7] = rlim - rl[0] + 3.5;
	339	pcits[8] = rlim;
cfce8870	340	gMC->Gsvolu("ICMO", "PCON", idtmed[275], pcits, 9);
fe4da5cc	341	AliMatrix(idrotm[200], 90., 0., 90., 90., 180., 0.);
cfce8870	342	gMC->Gspos("ICMO", 1, "ITSV", 0., 0., 0., 0, "ONLY");
cfce8870	343	gMC->Gspos("ICMO", 2, "ITSV", 0., 0., 0., idrotm[200], "ONLY");
fe4da5cc	344
	345	// DIVIDE INTO NSEC PHI-SECTIONS
	346
cfce8870	347	gMC->Gsdvn("ICMD", "ICMO", nsec, 2);
	348	gMC->Gsatt("ICMO", "SEEN", 0);
	349	gMC->Gsatt("ICMD", "SEEN", 0);
fe4da5cc	350
	351	// CONICAL CABLES
	352
	353	pcits[2] = 2.;
cfce8870	354	gMC->Gsvolu("ICCO", "PCON", idtmed[278], pcits, 0);
fe4da5cc	355	for (i = 1; i < 6; ++i) {
	356	pcits[0] = -dphi[i] / 2.;
	357	pcits[1] = dphi[i];
	358	if (i < 5) {
	359	dzco = TMath::Tan(acone) * (rl[i+1] - rl[i]);
	360	} else {
	361	dzco1 = zmax - (rzcone + TMath::Tan(acone) * (rl[5] - rl[0])) -2.;
	362	dzco2 = (rlim - rl[5]) * TMath::Tan(acone);
	363	if (rl[5] + dzco1 / TMath::Tan(acone) < rlim) {
	364	dzco = dzco1;
	365	} else {
	366	dzco = dzco2;
	367	}
	368	}
	369	pcits[3] = rzcone + TMath::Tan(acone) * (rl[i] - rl[0]);
	370	pcits[4] = rl[i] - drcac[i] / TMath::Sin(acone);
	371	pcits[5] = rl[i];
	372	pcits[6] = pcits[3] + dzco;
	373	pcits[7] = rl[i] + dzco / TMath::Tan(acone) - drcac[i] / TMath::Sin(acone);
	374	pcits[8] = rl[i] + dzco / TMath::Tan(acone);
	375
cfce8870	376	gMC->Gsposp("ICCO", i, "ICMD", 0., 0., 0., 0, "ONLY", pcits, 9);
fe4da5cc	377
	378	}
	379	zend = pcits[6];
	380	rend = pcits[8];
	381
	382	// CONICAL CABLES BELOW TPC
	383
	384	// DEFINE A CONICAL GHOST VOLUME FOR THE PHI SEGMENTATION
	385	pcits[0] = 0.;
	386	pcits[1] = 360.;
	387	pcits[2] = 2.;
	388	pcits[3] = zend;
	389	pcits[5] = rend;
	390	pcits[4] = pcits[5] - drca_tpc;
	391	pcits[6] = xltpc;
	392	pcits[8] = pcits[4] + (pcits[6] - pcits[3]) * TMath::Tan(acable * kDegrad);
	393	pcits[7] = pcits[8] - drca_tpc;
	394	AliMatrix(idrotm[200], 90., 0., 90., 90., 180., 0.);
cfce8870	395	gMC->Gsvolu("ICCM", "PCON", idtmed[275], pcits, 9);
	396	gMC->Gspos("ICCM", 1, "ALIC", 0., 0., 0., 0, "ONLY");
	397	gMC->Gspos("ICCM", 2, "ALIC", 0., 0., 0., idrotm[200], "ONLY");
	398	gMC->Gsdvn("ITMD", "ICCM", nsec, 2);
	399	gMC->Gsatt("ITMD", "SEEN", 0);
	400	gMC->Gsatt("ICCM", "SEEN", 0);
fe4da5cc	401
	402	// NOW PLACE SEGMENTS WITH DECREASING PHI SEGMENTS INTO THE
	403	// GHOST-VOLUME
	404
	405	pcits[2] = 2.;
cfce8870	406	gMC->Gsvolu("ITTT", "PCON", idtmed[278], pcits, 0);
fe4da5cc	407	r0 = rend;
	408	z0 = zend;
	409	dz = (xltpc - zend) / 9.;
	410	for (i = 0; i < 9; ++i) {
	411	zi = z0 + i*dz + dz / 2.;
	412	ri = r0 + (zi - z0) * TMath::Tan(acable * kDegrad);
	413	dphii = dphi[5] * r0 / ri;
	414	pcits[0] = -dphii / 2.;
	415	pcits[1] = dphii;
	416	pcits[3] = zi - dz / 2.;
	417	pcits[5] = r0 + (pcits[3] - z0) * TMath::Tan(acable * kDegrad);
	418	pcits[4] = pcits[5] - drca_tpc;
	419	pcits[6] = zi + dz / 2.;
	420	pcits[8] = r0 + (pcits[6] - z0) * TMath::Tan(acable * kDegrad);
	421	pcits[7] = pcits[8] - drca_tpc;
	422
cfce8870	423	gMC->Gsposp("ITTT", i+1, "ITMD", 0., 0., 0., 0, "ONLY", pcits, 9);
fe4da5cc	424	}
	425
	426	// --- Outputs the geometry tree in the EUCLID/CAD format
	427
	428	if (fEuclidOut) {
cfce8870	429	gMC->WriteEuclid("ITSgeometry", "ITSV", 1, 5);
fe4da5cc	430	}
	431	}
	432
	433	//_____________________________________________________________________________
	434	void AliITSv1::CreateMaterials()
	435	{
	436	//
	437	// Create the materials for ITS
	438	//
	439	AliITS::CreateMaterials();
	440	}
	441
	442	//_____________________________________________________________________________
	443	void AliITSv1::Init()
	444	{
	445	//
	446	// Initialise the ITS after it has been built
	447	//
	448	AliITS::Init();
58005f18	449	fMajorVersion = 1;
58005f18	450	fMinorVersion = 0;
fe4da5cc	451	}
	452
	453	//_____________________________________________________________________________
2cb30c3a	454	void AliITSv1::DrawModule()
fe4da5cc	455	{
	456	//
	457	// Draw a shaded view of the FMD version 1
	458	//
	459
fe4da5cc	460
fe4da5cc	461	// Set everything unseen
cfce8870	462	gMC->Gsatt("*", "seen", -1);
fe4da5cc	463	//
fe4da5cc	464	// Set ALIC mother visible
cfce8870	465	gMC->Gsatt("ALIC","SEEN",0);
fe4da5cc	466	//
fe4da5cc	467	// Set the volumes visible
cfce8870	468	gMC->Gsatt("ITSV","SEEN",0);
	469	gMC->Gsatt("ITS1","SEEN",1);
	470	gMC->Gsatt("ITS2","SEEN",1);
	471	gMC->Gsatt("ITS3","SEEN",1);
	472	gMC->Gsatt("ITS4","SEEN",1);
	473	gMC->Gsatt("ITS5","SEEN",1);
	474	gMC->Gsatt("ITS6","SEEN",1);
fe4da5cc	475
cfce8870	476	gMC->Gsatt("IPCB","SEEN",1);
	477	gMC->Gsatt("ICO2","SEEN",1);
	478	gMC->Gsatt("ICER","SEEN",0);
	479	gMC->Gsatt("ISI2","SEEN",0);
	480	gMC->Gsatt("IPLA","SEEN",0);
	481	gMC->Gsatt("ICO3","SEEN",0);
	482	gMC->Gsatt("IEPX","SEEN",0);
	483	gMC->Gsatt("ISI3","SEEN",1);
	484	gMC->Gsatt("ISUP","SEEN",0);
	485	gMC->Gsatt("ICHO","SEEN",0);
	486	gMC->Gsatt("ICMO","SEEN",0);
	487	gMC->Gsatt("ICMD","SEEN",0);
	488	gMC->Gsatt("ICCO","SEEN",1);
	489	gMC->Gsatt("ICCM","SEEN",0);
	490	gMC->Gsatt("ITMD","SEEN",0);
	491	gMC->Gsatt("ITTT","SEEN",1);
fe4da5cc	492
fe4da5cc	493	//
cfce8870	494	gMC->Gdopt("hide", "on");
	495	gMC->Gdopt("shad", "on");
	496	gMC->Gsatt("*", "fill", 7);
	497	gMC->SetClipBox(".");
	498	gMC->SetClipBox("*", 0, 300, -300, 300, -300, 300);
	499	gMC->DefaultRange();
	500	gMC->Gdraw("alic", 40, 30, 0, 11, 10, .07, .07);
	501	gMC->Gdhead(1111, "Inner Tracking System Version 1");
	502	gMC->Gdman(17, 6, "MAN");
fe4da5cc	503	}
	504
	505	//_____________________________________________________________________________
	506	void AliITSv1::StepManager()
	507	{
	508	//
	509	// Called at every step in the ITS
	510	//
	511	Int_t copy, id;
58005f18	512	Float_t hits[8];
58005f18	513	Int_t vol[4];
0a6d8768	514	TLorentzVector position, momentum;
fe4da5cc	515	TClonesArray &lhits = *fHits;
fe4da5cc	516	//
58005f18	517	// Track status
	518	vol[3] = 0;
	519	if(gMC->IsTrackInside()) vol[3] += 1;
	520	if(gMC->IsTrackEntering()) vol[3] += 2;
	521	if(gMC->IsTrackExiting()) vol[3] += 4;
	522	if(gMC->IsTrackOut()) vol[3] += 8;
	523	if(gMC->IsTrackDisappeared()) vol[3] += 16;
	524	if(gMC->IsTrackStop()) vol[3] += 32;
	525	if(gMC->IsTrackAlive()) vol[3] += 64;
	526	//
	527	// Fill hit structure.
cfce8870	528	if(gMC->TrackCharge() && gMC->Edep()) {
fe4da5cc	529	//
fe4da5cc	530	// Only entering charged tracks
58005f18	531	if((id=gMC->CurrentVolID(copy))==fIdSens[0]) {
fe4da5cc	532	vol[0]=1;
0a6d8768	533	id=gMC->CurrentVolOffID(1,copy);
fe4da5cc	534	vol[1]=copy;
0a6d8768	535	id=gMC->CurrentVolOffID(2,copy);
fe4da5cc	536	vol[2]=copy;
58005f18	537	} else if(id==fIdSens[1]) {
fe4da5cc	538	vol[0]=2;
0a6d8768	539	id=gMC->CurrentVolOffID(1,copy);
fe4da5cc	540	vol[1]=copy;
0a6d8768	541	id=gMC->CurrentVolOffID(2,copy);
fe4da5cc	542	vol[2]=copy;
58005f18	543	} else if(id==fIdSens[2]) {
fe4da5cc	544	vol[0]=3;
fe4da5cc	545	vol[1]=copy;
0a6d8768	546	id=gMC->CurrentVolOffID(1,copy);
fe4da5cc	547	vol[2]=copy;
58005f18	548	} else if(id==fIdSens[3]) {
fe4da5cc	549	vol[0]=4;
fe4da5cc	550	vol[1]=copy;
0a6d8768	551	id=gMC->CurrentVolOffID(1,copy);
fe4da5cc	552	vol[2]=copy;
58005f18	553	} else if(id==fIdSens[4]) {
fe4da5cc	554	vol[0]=5;
fe4da5cc	555	vol[1]=copy;
0a6d8768	556	id=gMC->CurrentVolOffID(1,copy);
fe4da5cc	557	vol[2]=copy;
58005f18	558	} else if(id==fIdSens[5]) {
fe4da5cc	559	vol[0]=6;
fe4da5cc	560	vol[1]=copy;
0a6d8768	561	id=gMC->CurrentVolOffID(1,copy);
fe4da5cc	562	vol[2]=copy;
fe4da5cc	563	} else return;
cfce8870	564	gMC->TrackPosition(position);
cfce8870	565	gMC->TrackMomentum(momentum);
fe4da5cc	566	hits[0]=position[0];
	567	hits[1]=position[1];
	568	hits[2]=position[2];
0a6d8768	569	hits[3]=momentum[0];
0a6d8768	570	hits[4]=momentum[1];
58005f18	571	hits[5]=momentum[2];
cfce8870	572	hits[6]=gMC->Edep();
58005f18	573	hits[7]=gMC->TrackTime();
fe4da5cc	574	new(lhits[fNhits++]) AliITShit(fIshunt,gAlice->CurrentTrack(),vol,hits);
	575	}
	576	}