[u/mrichter/AliRoot.git] / ITS / AliITSv0.cxx

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  Inner Traking System version 0                                           //
//                                                                           //
//Begin_Html
/*
<img src="gif/AliITSv0Class.gif">
</pre>
<br clear=left>
<font size=+2 color=red>
<p>The responsible person for this module is
<a href="mailto:roberto.barbera@ct.infn.it">Roberto Barbera</a>.
</font>
<pre>
*/
//End_Html
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#include <TMath.h>
#include <TRandom.h>
#include <TVector.h>
#include "AliITSv0.h"
#include "AliRun.h"

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

ClassImp(AliITSv0)
 
//_____________________________________________________________________________
AliITSv0::AliITSv0() : AliITS() 
{
  //
  // Default constructor for ITS
  //
}
 
//_____________________________________________________________________________
AliITSv0::AliITSv0(const char *name, const char *title)
      : AliITS(name, title)
{
  //
  // Standard constructor for ITS
  //
}
 
//_____________________________________________________________________________
void AliITSv0::CreateGeometry()
{
  //
  // Create Geometry for ITS version 0
  //
  //Begin_Html
  /*
    <img src="gif/AliITSv0Tree.gif">
  */
  //End_Html
  //Begin_Html
  /*
    <img src="gif/AliITSv0.gif">
  */
  //End_Html
  
  AliMC* pMC = AliMC::GetMC();
  
  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 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 drca;
  //Float_t dzfc, dwat;
  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 rstep, r0, z0, acable, fp, dz, zi, ri;
  Int_t idrotm[399];
  Float_t rzcone;
  Float_t dgh[15];
  
  Int_t *idtmed = gAlice->Idtmed();
  
  //     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)
  
  //     CABLE THICKNESS (HORIZONTAL CABLES CONNECTING THE LAYERS) 
  drca = .2;
  
  //     WATER THICKNESS 

  //dwat = .1;
  
  //     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 
  
  //      DO I=1,6 
  //        DZL(I)=DZL(I)/2. 
  //        DZB(I)=DZB(I)/2. 
  //     ENDDO 
  //      DRCA=DRCA/2. 
  //      ACONE=ACONE/2. 
  //      DRCA_TPC=DRCA_TPC/2. 
  //      RZCONE=RZCONE/2. 
  //      DZFC=DZFC/2. 
  //      ZMAX=ZMAX/2. 
  //      XLTPC=XLTPC/2. 
  acable = 8.5;  
  
  //     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;
  
  //     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;
  pMC->Gsvolu("ITSV", "TUBE", idtmed[275], dgh, 3);
  
  // --- Place the ghost volume in its mother volume (ALIC) and make it 
  //     invisible 
  
  pMC->Gspos("ITSV", 1, "ALIC", 0., 0., 0., 0, "ONLY");
  pMC->Gsatt("ITSV", "SEEN", 0);
  
  //     ITS LAYERS (SILICON) 
  
  dits[0] = rl[0];
  dits[1] = rl[0] + drl[0];
  dits[2] = dzl[0];
  pMC->Gsvolu("ITS1", "TUBE", idtmed[199], dits, 3);
  pMC->Gspos("ITS1", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  
  dits[0] = rl[1];
  dits[1] = rl[1] + drl[1];
  dits[2] = dzl[1];
  pMC->Gsvolu("ITS2", "TUBE", idtmed[199], dits, 3);
  pMC->Gspos("ITS2", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  
  dits[0] = rl[2];
  dits[1] = rl[2] + drl[2];
  dits[2] = dzl[2];
  pMC->Gsvolu("ITS3", "TUBE", idtmed[224], dits, 3);
  pMC->Gspos("ITS3", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  
  dits[0] = rl[3];
  dits[1] = rl[3] + drl[3];
  dits[2] = dzl[3];
  pMC->Gsvolu("ITS4", "TUBE", idtmed[224], dits, 3);
  pMC->Gspos("ITS4", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  
  dits[0] = rl[4];
  dits[1] = rl[4] + drl[4];
  dits[2] = dzl[4];
  pMC->Gsvolu("ITS5", "TUBE", idtmed[249], dits, 3);
  pMC->Gspos("ITS5", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  
  dits[0] = rl[5];
  dits[1] = rl[5] + drl[5];
  dits[2] = dzl[5];
  pMC->Gsvolu("ITS6", "TUBE", idtmed[249], dits, 3);
  pMC->Gspos("ITS6", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  
  //    ELECTRONICS BOXES   
  //     PCB (layer #3 and #4) 
  
  pMC->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];
    pMC->Gsposp("IPCB", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    pMC->Gsposp("IPCB", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     COPPER (layer #3 and #4) 
  
  pMC->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];
    pMC->Gsposp("ICO2", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    pMC->Gsposp("ICO2", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     CERAMICS (layer #3 and #4) 
  
  pMC->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];
    pMC->Gsposp("ICER", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    pMC->Gsposp("ICER", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     SILICON (layer #3 and #4) 
  
  pMC->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 - 1] + dits[2];
    pMC->Gsposp("ISI2", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    pMC->Gsposp("ISI2", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     PLASTIC (G10FR4) (layer #5 and #6) 
  
  pMC->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];
    pMC->Gsposp("IPLA", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    pMC->Gsposp("IPLA", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     COPPER (layer #5 and #6) 
  
  pMC->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];
    pMC->Gsposp("ICO3", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    pMC->Gsposp("ICO3", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     EPOXY (layer #5 and #6) 
  
  pMC->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];
    pMC->Gsposp("IEPX", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    pMC->Gsposp("IEPX", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //     SILICON (layer #5 and #6) 
  
  pMC->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];
    pMC->Gsposp("ISI3", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    pMC->Gsposp("ISI3", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  //    SUPPORT 
  
  pMC->Gsvolu("ISUP", "TUBE", idtmed[274], dits, 0);
  for (i = 0; i < 6; ++i) {
    dits[0] = rl[i];
    if (i < 5) dits[1] = rl[i+1];
    else       dits[1] = rlim;
    dits[2] = drsu / 2.;
    zpos = dzl[i] + dzb[i] + dits[2];
    pMC->Gsposp("ISUP", i+1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    pMC->Gsposp("ISUP", i+7, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
  }
  
  // CABLES (HORIZONTAL) 
  
  pMC->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] + dzb[i] + drsu + dits[2];
    pMC->Gsposp("ICHO", i+1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
    pMC->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;
  pMC->Gsvolu("ICMO", "PCON", idtmed[275], pcits, 9);
  AliMatrix(idrotm[200], 90., 0., 90., 90., 180., 0.);
  pMC->Gspos("ICMO", 1, "ITSV", 0., 0., 0., 0, "ONLY");
  pMC->Gspos("ICMO", 2, "ITSV", 0., 0., 0., idrotm[200], "ONLY");
  
  //     DIVIDE INTO NSEC PHI-SECTIONS 
  
  pMC->Gsdvn("ICMD", "ICMO", nsec, 2);
  pMC->Gsatt("ICMO", "SEEN", 0);
  pMC->Gsatt("ICMD", "SEEN", 0);
  
  //     CONICAL CABLES 
  
  pcits[2] = 2.;
  pMC->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] - rl[i-1]);
    } 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);
    
    pMC->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.);
  pMC->Gsvolu("ICCM", "PCON", idtmed[275], pcits, 9);
  pMC->Gspos("ICCM", 1, "ALIC", 0., 0., 0., 0, "ONLY");
  pMC->Gspos("ICCM", 2, "ALIC", 0., 0., 0., idrotm[200], "ONLY");
  pMC->Gsdvn("ITMD", "ICCM", nsec, 2);
  pMC->Gsatt("ITMD", "SEEN", 0);
  pMC->Gsatt("ICCM", "SEEN", 0);
  
  //     NOW PLACE SEGMENTS WITH DECREASING PHI SEGMENTS INTO THE 
  //     GHOST-VOLUME 
  
  pcits[2] = 2.;
  pMC->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;
    
    pMC->Gsposp("ITTT", i+1, "ITMD", 0., 0., 0., 0, "ONLY", pcits, 9);
  }
  
  // --- Outputs the geometry tree in the EUCLID/CAD format 
  
  if (fEuclidOut) {
    pMC->WriteEuclid("ITSgeometry", "ITSV", 1, 5);
  }
}
 
//_____________________________________________________________________________
void AliITSv0::DrawModule()
{
  //
  // Draw a shaded view of the FMD version 1
  //
  
  AliMC* pMC = AliMC::GetMC();
  
  // Set everything unseen
  pMC->Gsatt("*", "seen", -1);
  // 
  // Set ALIC mother visible
  pMC->Gsatt("ALIC","SEEN",0);
  //
  // Set the volumes visible
  pMC->Gsatt("ITSV","SEEN",0);
  pMC->Gsatt("ITS1","SEEN",1);
  pMC->Gsatt("ITS2","SEEN",1);
  pMC->Gsatt("ITS3","SEEN",1);
  pMC->Gsatt("ITS4","SEEN",1);
  pMC->Gsatt("ITS5","SEEN",1);
  pMC->Gsatt("ITS6","SEEN",1);
  pMC->Gsatt("ISI2","SEEN",1);
  pMC->Gsatt("IPLA","SEEN",1);
  pMC->Gsatt("ICHO","SEEN",1);
  pMC->Gsatt("ICMO","SEEN",0);
  pMC->Gsatt("ICMD","SEEN",0);
  pMC->Gsatt("ICCO","SEEN",1);
  pMC->Gsatt("ICCM","SEEN",0);
  pMC->Gsatt("ITMD","SEEN",0);
  pMC->Gsatt("ITTT","SEEN",1);
  //
  pMC->Gdopt("hide", "on");
  pMC->Gdopt("shad", "on");
  pMC->Gsatt("*", "fill", 7);
  pMC->SetClipBox(".");
  pMC->SetClipBox("*", 0, 300, -300, 300, -300, 300);
  pMC->DefaultRange();
  pMC->Gdraw("alic", 40, 30, 0, 11, 10, .05, .05);
  pMC->Gdhead(1111, "Inner Tracking System Version 0");
  pMC->Gdman(16, 6, "MAN");
}

//_____________________________________________________________________________
void AliITSv0::StepManager()
{
  //
  // Called at every step in the ITS
  //
  Int_t         copy, id;
  Float_t       hits[7];
  Int_t         vol[3];
  Float_t       position[3];
  Float_t       momentum[4];
  TClonesArray &lhits = *fHits;
  AliMC* pMC = AliMC::GetMC();
  //
  if(pMC->TrackCharge() && pMC->Edep()) {
    //
    // Only entering charged tracks
    if((id=pMC->CurrentVol(0,copy))==fIdSens1) {  
      vol[0]=1;
      id=pMC->CurrentVolOff(1,0,copy);      
      vol[1]=copy;
      id=pMC->CurrentVolOff(2,0,copy);
      vol[2]=copy;                       
    } else if(id==fIdSens2) {
      vol[0]=2;
      id=pMC->CurrentVolOff(1,0,copy);       
      vol[1]=copy;
      id=pMC->CurrentVolOff(2,0,copy);
      vol[2]=copy;                    
    } else if(id==fIdSens3) {
      vol[0]=3;
      vol[1]=copy;
      id=pMC->CurrentVolOff(1,0,copy);
      vol[2]=copy;             
    } else if(id==fIdSens4) {
      vol[0]=4;
      vol[1]=copy;
      id=pMC->CurrentVolOff(1,0,copy);
      vol[2]=copy;                  
    } else if(id==fIdSens5) {
      vol[0]=5;
      vol[1]=copy;
      id=pMC->CurrentVolOff(1,0,copy);
      vol[2]=copy;               
    } else if(id==fIdSens6) {
      vol[0]=6;
      vol[1]=copy;
      id=pMC->CurrentVolOff(1,0,copy);
      vol[2]=copy;                      
    } else return;
    pMC->TrackPosition(position);
    pMC->TrackMomentum(momentum);
    hits[0]=position[0];
    hits[1]=position[1];
    hits[2]=position[2];          
    hits[3]=momentum[0]*momentum[3];
    hits[4]=momentum[1]*momentum[3];
    hits[5]=momentum[2]*momentum[3];          
    hits[6]=pMC->Edep();
    new(lhits[fNhits++]) AliITShit(fIshunt,gAlice->CurrentTrack(),vol,hits);
  }    
}
Commit	Line	Data
fe4da5cc	1	///////////////////////////////////////////////////////////////////////////////
	2	// //
	3	// Inner Traking System version 0 //
	4	// //
	5	//Begin_Html
	6	/*
	7	<img src="gif/AliITSv0Class.gif">
	8	</pre>
	9	<br clear=left>
	10	<font size=+2 color=red>
	11	<p>The responsible person for this module is
	12	<a href="mailto:roberto.barbera@ct.infn.it">Roberto Barbera</a>.
	13	</font>
	14	<pre>
	15	*/
	16	//End_Html
	17	// //
	18	///////////////////////////////////////////////////////////////////////////////
	19
	20	#include <TMath.h>
	21	#include <TRandom.h>
	22	#include <TVector.h>
	23	#include "AliITSv0.h"
	24	#include "AliRun.h"
	25
	26	#include "AliMC.h"
	27	#include "AliConst.h"
	28
	29	ClassImp(AliITSv0)
	30
	31	//_____________________________________________________________________________
	32	AliITSv0::AliITSv0() : AliITS()
	33	{
	34	//
	35	// Default constructor for ITS
	36	//
	37	}
	38
	39	//_____________________________________________________________________________
	40	AliITSv0::AliITSv0(const char name, const char title)
	41	: AliITS(name, title)
	42	{
	43	//
	44	// Standard constructor for ITS
	45	//
	46	}
	47
	48	//_____________________________________________________________________________
	49	void AliITSv0::CreateGeometry()
	50	{
	51	//
	52	// Create Geometry for ITS version 0
	53	//
	54	//Begin_Html
	55	/*
	56	<img src="gif/AliITSv0Tree.gif">
	57	*/
	58	//End_Html
	59	//Begin_Html
	60	/*
	61	<img src="gif/AliITSv0.gif">
	62	*/
	63	//End_Html
	64
65	AliMC* pMC = AliMC::GetMC();
66
67	Float_t rl[6] = { 3.9,7.6,14.,24.,40.,45. }; //SILICON LAYERS INNER RADIUS
68	Float_t drl[6] = { .755,.755,.809,.809,.7,.7 }; //THICKNESS OF LAYERS (in % radiation length)
69	Float_t dzl[6] = { 12.67,16.91,20.85,29.15,45.11,50.975 }; //HALF LENGTH OF LAYERS
70	Float_t drpcb[6] = { 0.,0.,.06,.06,0.,0. }; //PCB THICKNESS
71	Float_t drcu[6] = { 0.,0.,.0504,.0504,.0357,.0357 }; //COPPER THICKNESS
72	Float_t drsi[6] = { 0.,0.,.006,.006,.3571,.3571 }; //SILICON THICKNESS
73	Float_t drcer[6] = { 0.,0.,.08,.08,0.,0. }; //CERAMICS THICKNESS
74	Float_t drepx[6] = { 0.,0.,0.,0.,.5357,.5357 }; //EPOXY THICKNESS
75	Float_t drpla[6] = { 0.,0.,0.,0.,.1786,.1786 }; //PLASTIC THICKNESS
76	Float_t dzb[6] = { 0.,0.,15.,15.,4.,4. }; //LENGTH OF BOXES
77	Float_t dphi[6] = { 72.,72.,72.,72.,50.6,45. }; //COVERED PHI-RANGE FOR LAYERS 1-6
78
79	Float_t drca;
80	//Float_t dzfc, dwat;
81	Int_t i, nsec;
82	Float_t rend, drca_tpc, dzco, zend, dits[3], rlim, drsu, zmax;
83	Float_t zpos, dzco1, dzco2;
84	Float_t drcac[6], acone, dphii;
85	Float_t pcits[15], xltpc;
86	Float_t rstep, r0, z0, acable, fp, dz, zi, ri;
87	Int_t idrotm[399];
88	Float_t rzcone;
89	Float_t dgh[15];
90
91	Int_t *idtmed = gAlice->Idtmed();
92
93	// CONVERT INTO CM (RL(SI)=9.36 CM)
94	for (i = 0; i < 6; ++i) {
95	drl[i] = drl[i]/100. * 9.36;
96	}
97
98	// SUPPORT ENDPLANE THICKNESS
99	drsu = 2.*0.06 + 1./20; // 1./20. is 1 cm of honeycomb (1/20 carbon density)
100
101	// CABLE THICKNESS (HORIZONTAL CABLES CONNECTING THE LAYERS)
102	drca = .2;
103
104	// WATER THICKNESS
105
106	//dwat = .1;
107
108	// CONE BELOW TPC
109
110	drca_tpc = 1.2/4.;
111
112	// CABLE THICKNESS (CONICAL CABLES CONNECTING THE LAYERS)
113
114
115	// ITS CONE ANGLE
116
117	acone = 45.;
118	acone *= kDegrad;
119
120	// CONE RADIUS AT 1ST LAYER
121
122	rzcone = 30.;
123
124	// FIELD CAGE HALF LENGTH
125
126	//dzfc = 64.5;
127	rlim = 48.;
128	zmax = 80.;
129	xltpc = 275.;
130
131
132	// PARAMETERS FOR SMALL (1/2) ITS
133
134	// DO I=1,6
135	// DZL(I)=DZL(I)/2.
136	// DZB(I)=DZB(I)/2.
137	// ENDDO
138	// DRCA=DRCA/2.
139	// ACONE=ACONE/2.
140	// DRCA_TPC=DRCA_TPC/2.
141	// RZCONE=RZCONE/2.
142	// DZFC=DZFC/2.
143	// ZMAX=ZMAX/2.
144	// XLTPC=XLTPC/2.
145	acable = 8.5;
146
147	// EQUAL DISTRIBUTION INTO THE 6 LAYERS
148	rstep = drca_tpc / 6.;
149	for (i = 0; i < 6; ++i) {
150	drcac[i] = (i+1) * rstep;
151	}
152
153	// NUMBER OF PHI SECTORS
154
155	nsec = 5;
156
157	// NOW PACK USING THICKNESS
158
159	for (i = 0; i < 6; ++i) {
160
161	// PACKING FACTOR
162	fp = rl[5] / rl[i];
163
164	// PHI-PACKING NOT SUFFICIENT ?
165
166	if (dphi[i]/45 < fp) {
167	drcac[i] = drcac[i]fp45/dphi[i];
168	}
169	}
170
171
172	// --- Define ghost volume containing the six layers and fill it with air
173
174	dgh[0] = 3.5;
175	dgh[1] = 50.;
176	dgh[2] = zmax;
177	pMC->Gsvolu("ITSV", "TUBE", idtmed[275], dgh, 3);
178
179	// --- Place the ghost volume in its mother volume (ALIC) and make it
180	// invisible
181
182	pMC->Gspos("ITSV", 1, "ALIC", 0., 0., 0., 0, "ONLY");
183	pMC->Gsatt("ITSV", "SEEN", 0);
184
185	// ITS LAYERS (SILICON)
186
187	dits[0] = rl[0];
188	dits[1] = rl[0] + drl[0];
189	dits[2] = dzl[0];
190	pMC->Gsvolu("ITS1", "TUBE", idtmed[199], dits, 3);
191	pMC->Gspos("ITS1", 1, "ITSV", 0., 0., 0., 0, "ONLY");
192
193	dits[0] = rl[1];
194	dits[1] = rl[1] + drl[1];
195	dits[2] = dzl[1];
196	pMC->Gsvolu("ITS2", "TUBE", idtmed[199], dits, 3);
197	pMC->Gspos("ITS2", 1, "ITSV", 0., 0., 0., 0, "ONLY");
198
199	dits[0] = rl[2];
200	dits[1] = rl[2] + drl[2];
201	dits[2] = dzl[2];
202	pMC->Gsvolu("ITS3", "TUBE", idtmed[224], dits, 3);
203	pMC->Gspos("ITS3", 1, "ITSV", 0., 0., 0., 0, "ONLY");
204
205	dits[0] = rl[3];
206	dits[1] = rl[3] + drl[3];
207	dits[2] = dzl[3];
208	pMC->Gsvolu("ITS4", "TUBE", idtmed[224], dits, 3);
209	pMC->Gspos("ITS4", 1, "ITSV", 0., 0., 0., 0, "ONLY");
210
211	dits[0] = rl[4];
212	dits[1] = rl[4] + drl[4];
213	dits[2] = dzl[4];
214	pMC->Gsvolu("ITS5", "TUBE", idtmed[249], dits, 3);
215	pMC->Gspos("ITS5", 1, "ITSV", 0., 0., 0., 0, "ONLY");
216
217	dits[0] = rl[5];
218	dits[1] = rl[5] + drl[5];
219	dits[2] = dzl[5];
220	pMC->Gsvolu("ITS6", "TUBE", idtmed[249], dits, 3);
221	pMC->Gspos("ITS6", 1, "ITSV", 0., 0., 0., 0, "ONLY");
222
223	// ELECTRONICS BOXES
224	// PCB (layer #3 and #4)
225
226	pMC->Gsvolu("IPCB", "TUBE", idtmed[233], dits, 0);
227	for (i = 2; i < 4; ++i) {
228	dits[0] = rl[i];
229	dits[1] = dits[0] + drpcb[i];
230	dits[2] = dzb[i] / 2.;
231	zpos = dzl[i] + dits[2];
232	pMC->Gsposp("IPCB", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
233	pMC->Gsposp("IPCB", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
234	}
235
236	// COPPER (layer #3 and #4)
237
238	pMC->Gsvolu("ICO2", "TUBE", idtmed[234], dits, 0);
239	for (i = 2; i < 4; ++i) {
240	dits[0] = rl[i] + drpcb[i];
241	dits[1] = dits[0] + drcu[i];
242	dits[2] = dzb[i] / 2.;
243	zpos = dzl[i] + dits[2];
244	pMC->Gsposp("ICO2", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
245	pMC->Gsposp("ICO2", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
246	}
247
248	// CERAMICS (layer #3 and #4)
249
250	pMC->Gsvolu("ICER", "TUBE", idtmed[235], dits, 0);
251	for (i = 2; i < 4; ++i) {
252	dits[0] = rl[i] + drpcb[i] + drcu[i];
253	dits[1] = dits[0] + drcer[i];
254	dits[2] = dzb[i] / 2.;
255	zpos = dzl[i] + dits[2];
256	pMC->Gsposp("ICER", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
257	pMC->Gsposp("ICER", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
258	}
259
260	// SILICON (layer #3 and #4)
261
262	pMC->Gsvolu("ISI2", "TUBE", idtmed[226], dits, 0);
263	for (i = 2; i < 4; ++i) {
264	dits[0] = rl[i] + drpcb[i] + drcu[i] + drcer[i];
265	dits[1] = dits[0] + drsi[i];
266	dits[2] = dzb[i] / 2.;
267	zpos = dzl[i - 1] + dits[2];
268	pMC->Gsposp("ISI2", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
269	pMC->Gsposp("ISI2", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
270	}
271
272	// PLASTIC (G10FR4) (layer #5 and #6)
273
274	pMC->Gsvolu("IPLA", "TUBE", idtmed[262], dits, 0);
275	for (i = 4; i < 6; ++i) {
276	dits[0] = rl[i];
277	dits[1] = dits[0] + drpla[i];
278	dits[2] = dzb[i] / 2.;
279	zpos = dzl[i] + dits[2];
280	pMC->Gsposp("IPLA", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
281	pMC->Gsposp("IPLA", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
282	}
283
284	// COPPER (layer #5 and #6)
285
286	pMC->Gsvolu("ICO3", "TUBE", idtmed[259], dits, 0);
287	for (i = 4; i < 6; ++i) {
288	dits[0] = rl[i] + drpla[i];
289	dits[1] = dits[0] + drcu[i];
290	dits[2] = dzb[i] / 2.;
291	zpos = dzl[i] + dits[2];
292	pMC->Gsposp("ICO3", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
293	pMC->Gsposp("ICO3", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
294	}
295
296	// EPOXY (layer #5 and #6)
297
298	pMC->Gsvolu("IEPX", "TUBE", idtmed[262], dits, 0);
299	for (i = 4; i < 6; ++i) {
300	dits[0] = rl[i] + drpla[i] + drcu[i];
301	dits[1] = dits[0] + drepx[i];
302	dits[2] = dzb[i] / 2.;
303	zpos = dzl[i] + dits[2];
304	pMC->Gsposp("IEPX", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
305	pMC->Gsposp("IEPX", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
306	}
307
308	// SILICON (layer #5 and #6)
309
310	pMC->Gsvolu("ISI3", "TUBE", idtmed[251], dits, 0);
311	for (i = 4; i < 6; ++i) {
312	dits[0] = rl[i] + drpla[i] + drcu[i] + drepx[i];
313	dits[1] = dits[0] + drsi[i];
314	dits[2] = dzb[i] / 2.;
315	zpos = dzl[i] + dits[2];
316	pMC->Gsposp("ISI3", i-1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
317	pMC->Gsposp("ISI3", i+1, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
318	}
319
320	// SUPPORT
321
322	pMC->Gsvolu("ISUP", "TUBE", idtmed[274], dits, 0);
323	for (i = 0; i < 6; ++i) {
324	dits[0] = rl[i];
325	if (i < 5) dits[1] = rl[i+1];
326	else dits[1] = rlim;
327	dits[2] = drsu / 2.;
328	zpos = dzl[i] + dzb[i] + dits[2];
329	pMC->Gsposp("ISUP", i+1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
330	pMC->Gsposp("ISUP", i+7, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
331	}
332
333	// CABLES (HORIZONTAL)
334
335	pMC->Gsvolu("ICHO", "TUBE", idtmed[278], dits, 0);
336	for (i = 0; i < 6; ++i) {
337	dits[0] = rl[i];
338	dits[1] = dits[0] + drca;
339	dits[2] = (rzcone + TMath::Tan(acone) * (rl[i] - rl[0]) - (dzl[i]+ dzb[i] + drsu)) / 2.;
340	zpos = dzl[i] + dzb[i] + drsu + dits[2];
341	pMC->Gsposp("ICHO", i+1, "ITSV", 0., 0., zpos, 0, "ONLY", dits, 3);
342	pMC->Gsposp("ICHO", i+7, "ITSV", 0., 0.,-zpos, 0, "ONLY", dits, 3);
343	}
344	// DEFINE A CONICAL GHOST VOLUME FOR THE PHI SEGMENTATION
345	pcits[0] = 0.;
346	pcits[1] = 360.;
347	pcits[2] = 2.;
348	pcits[3] = rzcone;
349	pcits[4] = 3.5;
350	pcits[5] = rl[0];
351	pcits[6] = pcits[3] + TMath::Tan(acone) * (rlim - rl[0]);
352	pcits[7] = rlim - rl[0] + 3.5;
353	pcits[8] = rlim;
354	pMC->Gsvolu("ICMO", "PCON", idtmed[275], pcits, 9);
355	AliMatrix(idrotm[200], 90., 0., 90., 90., 180., 0.);
356	pMC->Gspos("ICMO", 1, "ITSV", 0., 0., 0., 0, "ONLY");
357	pMC->Gspos("ICMO", 2, "ITSV", 0., 0., 0., idrotm[200], "ONLY");
358
359	// DIVIDE INTO NSEC PHI-SECTIONS
360
361	pMC->Gsdvn("ICMD", "ICMO", nsec, 2);
362	pMC->Gsatt("ICMO", "SEEN", 0);
363	pMC->Gsatt("ICMD", "SEEN", 0);
364
365	// CONICAL CABLES
366
367	pcits[2] = 2.;
368	pMC->Gsvolu("ICCO", "PCON", idtmed[278], pcits, 0);
369	for (i = 1; i < 6; ++i) {
370	pcits[0] = -dphi[i] / 2.;
371	pcits[1] = dphi[i];
372	if (i < 5) {
373	dzco = TMath::Tan(acone) * (rl[i] - rl[i-1]);
374	} else {
375	dzco1 = zmax - (rzcone + TMath::Tan(acone) * (rl[5] - rl[0])) -2.;
376	dzco2 = (rlim - rl[5]) * TMath::Tan(acone);
377	if (rl[5] + dzco1 / TMath::Tan(acone) < rlim) {
378	dzco = dzco1;
379	} else {
380	dzco = dzco2;
381	}
382	}
383	pcits[3] = rzcone + TMath::Tan(acone) * (rl[i] - rl[0]);
384	pcits[4] = rl[i] - drcac[i] / TMath::Sin(acone);
385	pcits[5] = rl[i];
386	pcits[6] = pcits[3] + dzco;
387	pcits[7] = rl[i] + dzco / TMath::Tan(acone) - drcac[i] / TMath::Sin(acone);
388	pcits[8] = rl[i] + dzco / TMath::Tan(acone);
389
390	pMC->Gsposp("ICCO", i, "ICMD", 0., 0., 0., 0, "ONLY", pcits, 9);
391
392	}
393	zend = pcits[6];
394	rend = pcits[8];
395
396	// CONICAL CABLES BELOW TPC
397
398	// DEFINE A CONICAL GHOST VOLUME FOR THE PHI SEGMENTATION
399	pcits[0] = 0.;
400	pcits[1] = 360.;
401	pcits[2] = 2.;
402	pcits[3] = zend;
403	pcits[5] = rend;
404	pcits[4] = pcits[5] - drca_tpc;
405	pcits[6] = xltpc;
406	pcits[8] = pcits[4] + (pcits[6] - pcits[3]) * TMath::Tan(acable * kDegrad);
407	pcits[7] = pcits[8] - drca_tpc;
408	AliMatrix(idrotm[200], 90., 0., 90., 90., 180., 0.);
409	pMC->Gsvolu("ICCM", "PCON", idtmed[275], pcits, 9);
410	pMC->Gspos("ICCM", 1, "ALIC", 0., 0., 0., 0, "ONLY");
411	pMC->Gspos("ICCM", 2, "ALIC", 0., 0., 0., idrotm[200], "ONLY");
412	pMC->Gsdvn("ITMD", "ICCM", nsec, 2);
413	pMC->Gsatt("ITMD", "SEEN", 0);
414	pMC->Gsatt("ICCM", "SEEN", 0);
415
416	// NOW PLACE SEGMENTS WITH DECREASING PHI SEGMENTS INTO THE
417	// GHOST-VOLUME
418
419	pcits[2] = 2.;
420	pMC->Gsvolu("ITTT", "PCON", idtmed[278], pcits, 0);
421	r0 = rend;
422	z0 = zend;
423	dz = (xltpc - zend) / 9.;
424	for (i = 0; i < 9; ++i) {
425	zi = z0 + i* dz + dz / 2.;
426	ri = r0 + (zi - z0) * TMath::Tan(acable * kDegrad);
427	dphii = dphi[5] * r0 / ri;
428	pcits[0] = -dphii / 2.;
429	pcits[1] = dphii;
430	pcits[3] = zi - dz / 2.;
431	pcits[5] = r0 + (pcits[3] - z0) * TMath::Tan(acable * kDegrad);
432	pcits[4] = pcits[5] - drca_tpc;
433	pcits[6] = zi + dz / 2.;
434	pcits[8] = r0 + (pcits[6] - z0) * TMath::Tan(acable * kDegrad);
435	pcits[7] = pcits[8] - drca_tpc;
436
437	pMC->Gsposp("ITTT", i+1, "ITMD", 0., 0., 0., 0, "ONLY", pcits, 9);
438	}
439
440	// --- Outputs the geometry tree in the EUCLID/CAD format
441
442	if (fEuclidOut) {
443	pMC->WriteEuclid("ITSgeometry", "ITSV", 1, 5);
444	}
445	}
446
447	//_____________________________________________________________________________
2cb30c3a	448	void AliITSv0::DrawModule()
fe4da5cc	449	{
	450	//
	451	// Draw a shaded view of the FMD version 1
	452	//
	453
	454	AliMC* pMC = AliMC::GetMC();
	455
	456	// Set everything unseen
	457	pMC->Gsatt("*", "seen", -1);
	458	//
	459	// Set ALIC mother visible
	460	pMC->Gsatt("ALIC","SEEN",0);
	461	//
	462	// Set the volumes visible
	463	pMC->Gsatt("ITSV","SEEN",0);
	464	pMC->Gsatt("ITS1","SEEN",1);
	465	pMC->Gsatt("ITS2","SEEN",1);
	466	pMC->Gsatt("ITS3","SEEN",1);
	467	pMC->Gsatt("ITS4","SEEN",1);
	468	pMC->Gsatt("ITS5","SEEN",1);
	469	pMC->Gsatt("ITS6","SEEN",1);
	470	pMC->Gsatt("ISI2","SEEN",1);
	471	pMC->Gsatt("IPLA","SEEN",1);
	472	pMC->Gsatt("ICHO","SEEN",1);
	473	pMC->Gsatt("ICMO","SEEN",0);
	474	pMC->Gsatt("ICMD","SEEN",0);
	475	pMC->Gsatt("ICCO","SEEN",1);
	476	pMC->Gsatt("ICCM","SEEN",0);
	477	pMC->Gsatt("ITMD","SEEN",0);
	478	pMC->Gsatt("ITTT","SEEN",1);
	479	//
	480	pMC->Gdopt("hide", "on");
	481	pMC->Gdopt("shad", "on");
	482	pMC->Gsatt("*", "fill", 7);
	483	pMC->SetClipBox(".");
	484	pMC->SetClipBox("*", 0, 300, -300, 300, -300, 300);
	485	pMC->DefaultRange();
	486	pMC->Gdraw("alic", 40, 30, 0, 11, 10, .05, .05);
	487	pMC->Gdhead(1111, "Inner Tracking System Version 0");
	488	pMC->Gdman(16, 6, "MAN");
	489	}
	490
	491	//_____________________________________________________________________________
	492	void AliITSv0::StepManager()
	493	{
	494	//
	495	// Called at every step in the ITS
	496	//
	497	Int_t copy, id;
	498	Float_t hits[7];
	499	Int_t vol[3];
	500	Float_t position[3];
	501	Float_t momentum[4];
	502	TClonesArray &lhits = *fHits;
	503	AliMC* pMC = AliMC::GetMC();
	504	//
	505	if(pMC->TrackCharge() && pMC->Edep()) {
	506	//
	507	// Only entering charged tracks
	508	if((id=pMC->CurrentVol(0,copy))==fIdSens1) {
	509	vol[0]=1;
	510	id=pMC->CurrentVolOff(1,0,copy);
	511	vol[1]=copy;
	512	id=pMC->CurrentVolOff(2,0,copy);
513	vol[2]=copy;
514	} else if(id==fIdSens2) {
515	vol[0]=2;
516	id=pMC->CurrentVolOff(1,0,copy);
517	vol[1]=copy;
518	id=pMC->CurrentVolOff(2,0,copy);
519	vol[2]=copy;
520	} else if(id==fIdSens3) {
521	vol[0]=3;
522	vol[1]=copy;
523	id=pMC->CurrentVolOff(1,0,copy);
524	vol[2]=copy;
525	} else if(id==fIdSens4) {
526	vol[0]=4;
527	vol[1]=copy;
528	id=pMC->CurrentVolOff(1,0,copy);
529	vol[2]=copy;
530	} else if(id==fIdSens5) {
531	vol[0]=5;
532	vol[1]=copy;
533	id=pMC->CurrentVolOff(1,0,copy);
534	vol[2]=copy;
535	} else if(id==fIdSens6) {
536	vol[0]=6;
537	vol[1]=copy;
538	id=pMC->CurrentVolOff(1,0,copy);
539	vol[2]=copy;
540	} else return;
541	pMC->TrackPosition(position);
542	pMC->TrackMomentum(momentum);
543	hits[0]=position[0];
544	hits[1]=position[1];
545	hits[2]=position[2];
546	hits[3]=momentum[0]*momentum[3];
547	hits[4]=momentum[1]*momentum[3];
548	hits[5]=momentum[2]*momentum[3];
549	hits[6]=pMC->Edep();
550	new(lhits[fNhits++]) AliITShit(fIshunt,gAlice->CurrentTrack(),vol,hits);
551	}
552	}