[u/mrichter/AliRoot.git] / TOF / AliTOFGeometry.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.                  *
 **************************************************************************/

/*
$Log$
Revision 1.2  2003/12/29 17:26:01  hristov
Using enum to initaialize static ints in the header file, the initialization of static floats moved to the implementation file

Revision 1.1  2003/12/29 15:18:03  decaro
TOF geometry updating (addition of AliTOFGeometry)

Revision 0.01  2003/12/04 S.Arcelli
Revision 0.02  2003/12/10 S.Arcelli:
        Implement Global methods GetPos & GetDetID 
Revision 0.03  2003/12/14 S.Arcelli
        Set Phi range [-180,180]->[0,360] 
*/

#include <stdlib.h>
#include <Riostream.h>
///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  TOF Geometry class                                                       //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

#include "AliConst.h"
#include "AliTOFGeometry.h"

ClassImp(AliTOFGeometry)

const Int_t AliTOFGeometry::fgkTimeDiff   = 25000;// Min signal separation (ps)

const Float_t AliTOFGeometry::fgkRmin     = 370.; // Inner radius of the TOF (cm)
const Float_t AliTOFGeometry::fgkRmax     = 399;  // Outer radius of the TOF (cm)
const Float_t AliTOFGeometry::fgkZlenA    = 106.0;// length (cm) of the A module
const Float_t AliTOFGeometry::fgkZlenB    = 141.0;// length (cm) of the B module
const Float_t AliTOFGeometry::fgkZlenC    = 177.5;// length (cm) of the C module
const Float_t AliTOFGeometry::fgkXPad     = 2.5;  // Pad size in the x direction (cm)
const Float_t AliTOFGeometry::fgkZPad     = 3.5;  // Pad size in the z direction (cm)
const Float_t AliTOFGeometry::fgkMaxhZtof = 371.5;// Max half z-size of TOF (cm)


const Float_t AliTOFGeometry::fgkSigmaForTail1= 2.;//Sig1 for simulation of TDC tails 
const Float_t AliTOFGeometry::fgkSigmaForTail2= 0.5;//Sig2 for simulation of TDC tails
const Float_t AliTOFGeometry::fgkSpeedOfLight = 0.299792458;// c (10^9 m/s)
const Float_t AliTOFGeometry::fgkPionMass     = 0.13957;// pion mass (Gev/c^2)
const Float_t AliTOFGeometry::fgkKaonMass     = 0.49368;// kaon mass (Gev/c^2)
const Float_t AliTOFGeometry::fgkProtonMass   = 0.93827;// proton mass (Gev/c^2)
const Float_t AliTOFGeometry::fgkElectronMass = 0.00051;// electron mass (Gev/c^2)
const Float_t AliTOFGeometry::fgkMuonMass     = 0.10566;// muon mass (Gev/c^2)


const Float_t AliTOFGeometry::fgkDprecMin = 0.0000075;//num.prec.tolerance on Thmin 
const Float_t AliTOFGeometry::fgkDprecMax = 0.0000100;//num.prec.tolerance on Thma 
const Float_t AliTOFGeometry::fgkDprecCen = 0.0000005;//num.prec.tolerance on <Theta> 

//_____________________________________________________________________________
AliTOFGeometry::AliTOFGeometry()
{
  //
  // AliTOFGeometry default constructor
  //
  Init();

}

//_____________________________________________________________________________
AliTOFGeometry::~AliTOFGeometry()
{
  //
  // AliTOFGeometry destructor
  //

}
//_____________________________________________________________________________
void AliTOFGeometry::Init()
{
  //
  // Initialize strip Tilt Angles and Heights
  //
  // Strips Tilt Angles
 
  const Float_t angles[fgkNPlates][fgkMaxNstrip] ={

 {44.494, 43.725, 42.946, 42.156, 41.357, 40.548, 39.729, 38.899, 
  38.060, 37.211, 36.353, 35.484, 34.606, 33.719, 32.822, 31.916, 
  31.001, 30.077, 29.144, 28.202 },

 {26.884, 25.922, 24.952, 23.975, 22.989, 22.320, 21.016, 20.309,
  19.015, 18.270, 16.989, 16.205, 14.941, 14.117, 12.871, 12.008,
  10.784, 9.8807, 8.681, 0.0 },

 { 7.5835, 6.4124, 5.4058, 4.2809, 3.2448,  2.1424, 1.078, -0., -1.078, 
  -2.1424, -3.2448, -4.2809, -5.4058, -6.4124, -7.5835, 0.0, 0.0, 0.0,
  0.0, 0.0 },
  
 {-8.681, -9.8807, -10.784, -12.008, -12.871, -14.117, -14.941, -16.205,
  -16.989, -18.27, -19.015, -20.309, -21.016, -22.32, -22.989,
   -23.975, -24.952, -25.922, -26.884, 0. },
  
 {-28.202, -29.144, -30.077, -31.001, -31.916, -32.822, -33.719, -34.606,
  -35.484, -36.353, -37.211, -38.06, -38.899, -39.729, -40.548,
   -41.357, -42.156, -42.946, -43.725, -44.494 }};


  //Strips Heights

   const Float_t heights[fgkNPlates][fgkMaxNstrip]= {

  {-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5,
   -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 },
  
  {-6.3, -7.1, -7.9, -8.7, -9.5, -3, -9.5,   -3, -9.5,   -3, 
   -9.5, -3.0, -9.5, -3.0, -9.5, -3, -9.5,   -3,   -9 , 0.},
  
  {  -3,   -9, -4.5,   -9, -4.5,     -9, -4.5,   -9, -4.5,   -9, 
     -4.5,   -9, -4.5,   -9,   -3,   0.0, 0.0, 0.0, 0.0, 0.0 },
  
  {  -9,   -3, -9.5,   -3, -9.5, -3, -9.5,   -3, -9.5,   -3, -9.5,
     -3, -9.5,   -3, -9.5,  -8.7, -7.9, -7.1, -6.3, 0. },
  
  {-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5,
   -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 }};


   // Deposit in fAngles, fHeights

  for (Int_t iplate = 0; iplate < fgkNPlates; iplate++) {
    for (Int_t istrip = 0; istrip < fgkMaxNstrip; istrip++) {
      fAngles[iplate][istrip]   = angles[iplate][istrip];
      fHeights[iplate][istrip]  = heights[iplate][istrip];
    }
  }

  fPhiSec   = 360./fgkNSectors;
}

//_____________________________________________________________________________
void AliTOFGeometry::GetPos(Int_t *det, Float_t *pos) 
{
//
// Returns space point coor (x,y,z) (cm)  for Detector 
// Indices  (iSect,iPlate,iStrip,iPadX,iPadZ) 
//

  pos[0]=GetX(det);  
  pos[1]=GetY(det);  
  pos[2]=GetZ(det);
  
}
//_____________________________________________________________________________
void AliTOFGeometry::GetDetID( Float_t *pos, Int_t *det) 
{
 //
 // Returns Detector Indices (iSect,iPlate,iStrip,iPadX,iPadZ) 
 // space point coor (x,y,z) (cm)  


  det[0]=GetSector(pos);  
  det[1]=GetPlate(pos);  
  det[2]=GetStrip(pos);
  det[3]=GetPadZ(pos);
  det[4]=GetPadX(pos);
  
}
//_____________________________________________________________________________
Float_t AliTOFGeometry::GetX(Int_t *det) 
{
  //
  // Returns X coordinate (cm)
  //

  Int_t isector = det[0];
  Int_t iplate  = det[1];
  Int_t istrip  = det[2];
  Int_t ipadz   = det[3];
  Int_t ipadx   = det[4];

  // Find out distance d on the plane wrt median phi:
  Float_t d = (ipadx+0.5)*fgkXPad-(fgkNpadX*fgkXPad)*0.5;

  // The radius r in xy plane:
  Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+
    (ipadz-0.5)*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25;

  // local azimuthal angle in the sector philoc
  Float_t philoc   = TMath:: ATan(d/r);

  // azimuthal angle in the global frame  phi
  Float_t phi      = philoc*kRaddeg+(isector+0.5 )*fPhiSec;                    

  Float_t xCoor    = r/TMath::Cos(philoc)*TMath::Cos(phi/kRaddeg);
  return xCoor;

}
//_____________________________________________________________________________
Float_t AliTOFGeometry::GetY(Int_t *det) 
{
  //
  // Returns Y coordinate (cm)
  //

  Int_t isector = det[0];
  Int_t iplate  = det[1];
  Int_t istrip  = det[2];
  Int_t ipadz   = det[3];
  Int_t ipadx   = det[4];

  // Find out distance d on the plane wrt median phi:
  Float_t d = (ipadx+0.5)*fgkXPad-(fgkNpadX*fgkXPad)*0.5;

  // The radius r in xy plane:
  Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+
    (ipadz-0.5)*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25;

  // local azimuthal angle in the sector philoc
  Float_t philoc   = TMath:: ATan(d/r);

  // azimuthal angle in the global frame  phi
  Float_t phi      = philoc*kRaddeg+(isector+0.5 )*fPhiSec;                    

  Float_t yCoor    = r/TMath::Cos(philoc)*TMath::Sin(phi/kRaddeg);
  return yCoor;

}

//_____________________________________________________________________________
Float_t AliTOFGeometry::GetZ(Int_t *det) 
{
  //
  // Returns Z coordinate (cm)
  //
  
  Int_t iplate  = det[1];
  Int_t istrip  = det[2];
  Int_t ipadz   = det[3];
  
  
  // The radius r in xy plane:
  Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip];

  Float_t zCoor = r*TMath::Tan(0.5*TMath::Pi()-GetStripTheta(iplate, istrip))-
         (ipadz-0.5)*fgkZPad*TMath::Cos(fAngles[iplate][istrip]/kRaddeg);
  return zCoor;

}
//_____________________________________________________________________________
Int_t AliTOFGeometry::GetSector(Float_t *pos) 
{
  //
  // Returns the Sector index 
  //

  Int_t   iSect = -1; 

  Float_t x = pos[0];
  Float_t y = pos[1];

  Float_t phi     =  TMath::ATan2(y,x);	
  if(phi<0.) phi=2.*TMath::Pi()+phi;
  iSect  = (Int_t) (phi*kRaddeg/fPhiSec);

  return iSect;

}
//_____________________________________________________________________________
Int_t AliTOFGeometry::GetPadX(Float_t *pos) 
{
  //
  // Returns the Pad index along X 
  //

  Int_t iPadX  = -1;

  Float_t x = pos[0];
  Float_t y = pos[1];
  Float_t z = pos[2];

  Int_t isector = GetSector(pos);
  if(isector == -1){  
    cout << "Detector Index could not be determined" << endl;
    return iPadX;}
  Int_t iplate =  GetPlate(pos);
  if(iplate == -1){  
    cout << "Detector Index could not be determined" << endl;
    return iPadX;} 
  Int_t istrip =  GetStrip(pos);
  if(istrip == -1){  
    cout << "Detector Index could not be determined" << endl;
    return iPadX;}


  Float_t rho=TMath::Sqrt(x*x+y*y);
  Float_t phi =  TMath::ATan2(y,x);	
  if(phi<0.) phi=2.*TMath::Pi()+phi;
 
  // Get the local angle in the sector philoc
  Float_t philoc   = phi*kRaddeg-(isector+0.5)*fPhiSec;
  philoc*=TMath::Pi()/180.;
  // theta projected on the median of the sector
  Float_t theta = TMath::ATan2(rho*TMath::Cos(philoc),z);
  // The radius r in xy plane:
  Float_t r   = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+
               (theta-GetStripTheta(iplate, istrip))/
    (GetMaxStripTheta(iplate, istrip)-GetMinStripTheta(iplate, istrip))
   * 2.*fgkZPad*TMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25;

  // Find out distance projected onto the strip plane 
  Float_t d = (r*TMath::Tan(philoc)+(fgkNpadX*fgkXPad)*0.5);

  iPadX  =  (Int_t) ( d/fgkXPad);  
  return iPadX;

}
//_____________________________________________________________________________
Int_t AliTOFGeometry::GetPlate(Float_t *pos) 
{
  //
  // Returns the Plate index 
  //
  Int_t iPlate=-1;

  Int_t isector = GetSector(pos);
  if(isector == -1){  
    cout << "Detector Index could not be determined" << endl;
    return iPlate;}
 
  Float_t x = pos[0];
  Float_t y = pos[1];
  Float_t z = pos[2];

  Float_t rho=TMath::Sqrt(x*x+y*y);
  Float_t phi=TMath::ATan2(y,x);	
  if(phi<0) phi=2.*TMath::Pi()+phi;
  // Get the local angle in the sector philoc
  Float_t philoc   = phi*kRaddeg-(isector+0.5)*fPhiSec;
  philoc*=TMath::Pi()/180.;
  // theta projected on the median of the sector
  Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z);

  for (Int_t i=0; i<fgkNPlates; i++){
    if ( GetMaxPlateTheta(i) >= theta && 
         GetMinPlateTheta(i) <= theta)iPlate=i;
  }
  
  return iPlate;

}
//_____________________________________________________________________________
Int_t AliTOFGeometry::GetStrip(Float_t *pos) 
{
  //
  // Returns the Strip index 
  //

  Int_t iStrip=-1;


  Int_t isector = GetSector(pos);
  if(isector == -1){  
    cout << "Detector Index could not be determined" << endl;
    return iStrip;}
  Int_t iplate =  GetPlate(pos);
  if(iplate == -1){  
    cout << "Detector Index could not be determined" << endl;
    return iStrip;} 


  Float_t x = pos[0];
  Float_t y = pos[1];
  Float_t z = pos[2];

  Int_t nstrips=0;
  if(iplate==0 || iplate == 4)nstrips=fgkNStripC;
  if(iplate==1 || iplate == 3)nstrips=fgkNStripB;
  if(iplate==2)               nstrips=fgkNStripA;

  Float_t rho=TMath::Sqrt(x*x+y*y);
  Float_t phi=TMath::ATan2(y,x);	
  if(phi<0) phi=2.*TMath::Pi()+phi;
  // Get the local angle in the sector philoc
  Float_t philoc   = phi*kRaddeg-(isector+0.5)*fPhiSec;
  philoc*=TMath::Pi()/180.;
  // theta projected on the median of the sector
  Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z);

  for (Int_t istrip=0; istrip<nstrips; istrip++){

    if( 
       GetMaxStripTheta(iplate,istrip) >= theta 
       &&  
       GetMinStripTheta(iplate,istrip) <= theta ) iStrip = istrip;
   
  }

  return iStrip;
}
//_____________________________________________________________________________
Int_t AliTOFGeometry::GetPadZ(Float_t *pos) 
{
  //
  // Returns the Pad index along Z 
  //
  Int_t iPadZ = -1;

  Int_t isector = GetSector(pos);
  if(isector == -1){  
    cout << "Detector Index could not be determined" << endl;
    return iPadZ;}
  Int_t iplate =  GetPlate(pos);
  if(iplate == -1){  
    cout << "Detector Index could not be determined" << endl;
    return iPadZ;} 
  Int_t istrip =  GetStrip(pos);
  if(istrip == -1){  
    cout << "Detector Index could not be determined" << endl;
    return iPadZ;}


  Float_t x = pos[0];
  Float_t y = pos[1];
  Float_t z = pos[2];

  Float_t rho=TMath::Sqrt(x*x+y*y);
  Float_t phi=TMath::ATan2(y,x);	
  if(phi<0) phi=2.*TMath::Pi()+phi;
  Float_t philoc   = phi*kRaddeg-(isector+0.5)*fPhiSec;
  philoc*=TMath::Pi()/180.;
  Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z);

  if (theta >= GetStripTheta(iplate, istrip))iPadZ=1;
  else iPadZ=0;

  return iPadZ;
}
//_____________________________________________________________________________
Float_t AliTOFGeometry::GetMinPlateTheta(Int_t iPlate) 
{
  //
  // Returns the minimum theta angle of a given plate iPlate (rad)
  //
  

  Int_t index=0;

  Float_t delta =0.;
  if(iPlate==0)delta = -1. ;
  if(iPlate==1)delta = -0.5;
  if(iPlate==3)delta = +0.5;
  if(iPlate==4)delta = +1. ;

  Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta;
  Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index];
  z =z+fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg);
  r =r-fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg);

  Float_t thmin = 0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin;
  return thmin;

}
//_____________________________________________________________________________
Float_t AliTOFGeometry::GetMaxPlateTheta(Int_t iPlate) 
{
  //
  // Returns the maximum theta angle of a given plate iPlate (rad)
  
  Int_t index=0;
  if(iPlate==0 ||iPlate == 4)index=fgkNStripC-1;
  if(iPlate==1 ||iPlate == 3)index=fgkNStripB-1;
  if(iPlate==2)              index=fgkNStripA-1;

  Float_t delta =0.;
  if(iPlate==0)delta = -1. ;
  if(iPlate==1)delta = -0.5;
  if(iPlate==3)delta = +0.5;
  if(iPlate==4)delta = +1. ;

  Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta;
  Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index];
  z =z-fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg);
  r= r+fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg);

  Float_t thmax    = 0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax;
  return thmax;

}
//_____________________________________________________________________________
Float_t  AliTOFGeometry::GetMaxStripTheta(Int_t iPlate, Int_t iStrip) 
{
  //
  // Returns the maximum theta angle of a given strip iStrip (rad)
  //
  

  Float_t delta =0.;
  if(iPlate==0)delta = -1. ;
  if(iPlate==1)delta = -0.5;
  if(iPlate==3)delta = +0.5;
  if(iPlate==4)delta = +1. ;

  Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip];
  Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta;
  z = z-fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg);
  r = r+fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg);
  Float_t thmax =0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax;
  return thmax;

}

//_____________________________________________________________________________
Float_t  AliTOFGeometry::GetMinStripTheta(Int_t iPlate, Int_t iStrip) 
{
  //
  // Returns the minimum theta angle of a given Strip iStrip (rad)
  //
  

  Float_t delta =0.;
  if(iPlate==0)delta = -1. ;
  if(iPlate==1)delta = -0.5;
  if(iPlate==3)delta = +0.5;
  if(iPlate==4)delta = +1. ;


  Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip];
  Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta;
  z =z+fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg);
  r =r-fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg);
  Float_t thmin =0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin;

  return thmin;

}


//_____________________________________________________________________________
Float_t  AliTOFGeometry::GetStripTheta(Int_t iPlate, Int_t iStrip) 
{
  //
  // returns the median theta angle of a given strip iStrip (rad)
  //
  

  Float_t delta =0.;
  if(iPlate==0)delta = -1. ;
  if(iPlate==1)delta = -0.5;
  if(iPlate==3)delta = +0.5;
  if(iPlate==4)delta = +1. ;

  Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip];
  Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta;
  Float_t theta =0.5*TMath::Pi()-TMath::ATan(z/r);
  if(iPlate != 2){
  if(theta > 0.5*TMath::Pi() )theta+=fgkDprecCen;
  if(theta < 0.5*TMath::Pi() )theta-=fgkDprecCen;
  }
  return theta;
}
Commit	Line	Data
0f4a7374	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/*
	17	$Log$
fb9747d4	18	Revision 1.2 2003/12/29 17:26:01 hristov
	19	Using enum to initaialize static ints in the header file, the initialization of static floats moved to the implementation file
	20
58eb5b61	21	Revision 1.1 2003/12/29 15:18:03 decaro
	22	TOF geometry updating (addition of AliTOFGeometry)
	23
0f4a7374	24	Revision 0.01 2003/12/04 S.Arcelli
	25	Revision 0.02 2003/12/10 S.Arcelli:
	26	Implement Global methods GetPos & GetDetID
	27	Revision 0.03 2003/12/14 S.Arcelli
	28	Set Phi range [-180,180]->[0,360]
	29	*/
	30
	31	#include <stdlib.h>
	32	#include <Riostream.h>
	33	///////////////////////////////////////////////////////////////////////////////
	34	// //
	35	// TOF Geometry class //
	36	// //
	37	///////////////////////////////////////////////////////////////////////////////
	38
	39	#include "AliConst.h"
	40	#include "AliTOFGeometry.h"
	41
	42	ClassImp(AliTOFGeometry)
	43
fb9747d4	44	const Int_t AliTOFGeometry::fgkTimeDiff = 25000;// Min signal separation (ps)
58eb5b61	45
fb9747d4	46	const Float_t AliTOFGeometry::fgkRmin = 370.; // Inner radius of the TOF (cm)
	47	const Float_t AliTOFGeometry::fgkRmax = 399; // Outer radius of the TOF (cm)
	48	const Float_t AliTOFGeometry::fgkZlenA = 106.0;// length (cm) of the A module
	49	const Float_t AliTOFGeometry::fgkZlenB = 141.0;// length (cm) of the B module
	50	const Float_t AliTOFGeometry::fgkZlenC = 177.5;// length (cm) of the C module
	51	const Float_t AliTOFGeometry::fgkXPad = 2.5; // Pad size in the x direction (cm)
	52	const Float_t AliTOFGeometry::fgkZPad = 3.5; // Pad size in the z direction (cm)
	53	const Float_t AliTOFGeometry::fgkMaxhZtof = 371.5;// Max half z-size of TOF (cm)
58eb5b61	54
58eb5b61	55
fb9747d4	56	const Float_t AliTOFGeometry::fgkSigmaForTail1= 2.;//Sig1 for simulation of TDC tails
	57	const Float_t AliTOFGeometry::fgkSigmaForTail2= 0.5;//Sig2 for simulation of TDC tails
	58	const Float_t AliTOFGeometry::fgkSpeedOfLight = 0.299792458;// c (10^9 m/s)
	59	const Float_t AliTOFGeometry::fgkPionMass = 0.13957;// pion mass (Gev/c^2)
	60	const Float_t AliTOFGeometry::fgkKaonMass = 0.49368;// kaon mass (Gev/c^2)
	61	const Float_t AliTOFGeometry::fgkProtonMass = 0.93827;// proton mass (Gev/c^2)
	62	const Float_t AliTOFGeometry::fgkElectronMass = 0.00051;// electron mass (Gev/c^2)
	63	const Float_t AliTOFGeometry::fgkMuonMass = 0.10566;// muon mass (Gev/c^2)
58eb5b61	64
58eb5b61	65
fb9747d4	66	const Float_t AliTOFGeometry::fgkDprecMin = 0.0000075;//num.prec.tolerance on Thmin
	67	const Float_t AliTOFGeometry::fgkDprecMax = 0.0000100;//num.prec.tolerance on Thma
	68	const Float_t AliTOFGeometry::fgkDprecCen = 0.0000005;//num.prec.tolerance on <Theta>
58eb5b61	69
0f4a7374	70	//_____________________________________________________________________________
	71	AliTOFGeometry::AliTOFGeometry()
	72	{
	73	//
	74	// AliTOFGeometry default constructor
	75	//
	76	Init();
	77
	78	}
	79
	80	//_____________________________________________________________________________
	81	AliTOFGeometry::~AliTOFGeometry()
	82	{
	83	//
	84	// AliTOFGeometry destructor
	85	//
	86
	87	}
	88	//_____________________________________________________________________________
	89	void AliTOFGeometry::Init()
	90	{
	91	//
	92	// Initialize strip Tilt Angles and Heights
	93	//
	94	// Strips Tilt Angles
	95
	96	const Float_t angles[fgkNPlates][fgkMaxNstrip] ={
	97
	98	{44.494, 43.725, 42.946, 42.156, 41.357, 40.548, 39.729, 38.899,
	99	38.060, 37.211, 36.353, 35.484, 34.606, 33.719, 32.822, 31.916,
	100	31.001, 30.077, 29.144, 28.202 },
	101
	102	{26.884, 25.922, 24.952, 23.975, 22.989, 22.320, 21.016, 20.309,
	103	19.015, 18.270, 16.989, 16.205, 14.941, 14.117, 12.871, 12.008,
	104	10.784, 9.8807, 8.681, 0.0 },
	105
	106	{ 7.5835, 6.4124, 5.4058, 4.2809, 3.2448, 2.1424, 1.078, -0., -1.078,
	107	-2.1424, -3.2448, -4.2809, -5.4058, -6.4124, -7.5835, 0.0, 0.0, 0.0,
	108	0.0, 0.0 },
	109
	110	{-8.681, -9.8807, -10.784, -12.008, -12.871, -14.117, -14.941, -16.205,
	111	-16.989, -18.27, -19.015, -20.309, -21.016, -22.32, -22.989,
	112	-23.975, -24.952, -25.922, -26.884, 0. },
	113
	114	{-28.202, -29.144, -30.077, -31.001, -31.916, -32.822, -33.719, -34.606,
	115	-35.484, -36.353, -37.211, -38.06, -38.899, -39.729, -40.548,
	116	-41.357, -42.156, -42.946, -43.725, -44.494 }};
	117
	118
	119	//Strips Heights
	120
	121	const Float_t heights[fgkNPlates][fgkMaxNstrip]= {
	122
	123	{-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5,
	124	-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 },
	125
	126	{-6.3, -7.1, -7.9, -8.7, -9.5, -3, -9.5, -3, -9.5, -3,
	127	-9.5, -3.0, -9.5, -3.0, -9.5, -3, -9.5, -3, -9 , 0.},
	128
	129	{ -3, -9, -4.5, -9, -4.5, -9, -4.5, -9, -4.5, -9,
	130	-4.5, -9, -4.5, -9, -3, 0.0, 0.0, 0.0, 0.0, 0.0 },
	131
	132	{ -9, -3, -9.5, -3, -9.5, -3, -9.5, -3, -9.5, -3, -9.5,
	133	-3, -9.5, -3, -9.5, -8.7, -7.9, -7.1, -6.3, 0. },
134
135	{-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5,
136	-5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5, -5.5 }};
137
138
139	// Deposit in fAngles, fHeights
140
141	for (Int_t iplate = 0; iplate < fgkNPlates; iplate++) {
142	for (Int_t istrip = 0; istrip < fgkMaxNstrip; istrip++) {
143	fAngles[iplate][istrip] = angles[iplate][istrip];
144	fHeights[iplate][istrip] = heights[iplate][istrip];
145	}
146	}
147
148	fPhiSec = 360./fgkNSectors;
149	}
150
151	//_____________________________________________________________________________
152	void AliTOFGeometry::GetPos(Int_t det, Float_t pos)
153	{
154	//
155	// Returns space point coor (x,y,z) (cm) for Detector
156	// Indices (iSect,iPlate,iStrip,iPadX,iPadZ)
157	//
158
159	pos[0]=GetX(det);
160	pos[1]=GetY(det);
161	pos[2]=GetZ(det);
162
163	}
164	//_____________________________________________________________________________
165	void AliTOFGeometry::GetDetID( Float_t pos, Int_t det)
166	{
167	//
168	// Returns Detector Indices (iSect,iPlate,iStrip,iPadX,iPadZ)
169	// space point coor (x,y,z) (cm)
170
171
172	det[0]=GetSector(pos);
173	det[1]=GetPlate(pos);
174	det[2]=GetStrip(pos);
175	det[3]=GetPadZ(pos);
176	det[4]=GetPadX(pos);
177
178	}
179	//_____________________________________________________________________________
180	Float_t AliTOFGeometry::GetX(Int_t *det)
181	{
182	//
183	// Returns X coordinate (cm)
184	//
185
186	Int_t isector = det[0];
187	Int_t iplate = det[1];
188	Int_t istrip = det[2];
189	Int_t ipadz = det[3];
190	Int_t ipadx = det[4];
191
192	// Find out distance d on the plane wrt median phi:
193	Float_t d = (ipadx+0.5)fgkXPad-(fgkNpadXfgkXPad)*0.5;
194
195	// The radius r in xy plane:
196	Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+
197	(ipadz-0.5)fgkZPadTMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25;
198
199	// local azimuthal angle in the sector philoc
200	Float_t philoc = TMath:: ATan(d/r);
201
202	// azimuthal angle in the global frame phi
203	Float_t phi = philockRaddeg+(isector+0.5 )fPhiSec;
204
205	Float_t xCoor = r/TMath::Cos(philoc)*TMath::Cos(phi/kRaddeg);
206	return xCoor;
207
208	}
209	//_____________________________________________________________________________
210	Float_t AliTOFGeometry::GetY(Int_t *det)
211	{
212	//
213	// Returns Y coordinate (cm)
214	//
215
216	Int_t isector = det[0];
217	Int_t iplate = det[1];
218	Int_t istrip = det[2];
219	Int_t ipadz = det[3];
220	Int_t ipadx = det[4];
221
222	// Find out distance d on the plane wrt median phi:
223	Float_t d = (ipadx+0.5)fgkXPad-(fgkNpadXfgkXPad)*0.5;
224
225	// The radius r in xy plane:
226	Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+
227	(ipadz-0.5)fgkZPadTMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25;
228
229	// local azimuthal angle in the sector philoc
230	Float_t philoc = TMath:: ATan(d/r);
231
232	// azimuthal angle in the global frame phi
233	Float_t phi = philockRaddeg+(isector+0.5 )fPhiSec;
234
235	Float_t yCoor = r/TMath::Cos(philoc)*TMath::Sin(phi/kRaddeg);
236	return yCoor;
237
238	}
239
240	//_____________________________________________________________________________
241	Float_t AliTOFGeometry::GetZ(Int_t *det)
242	{
243	//
244	// Returns Z coordinate (cm)
245	//
246
247	Int_t iplate = det[1];
248	Int_t istrip = det[2];
249	Int_t ipadz = det[3];
250
251
252	// The radius r in xy plane:
253	Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip];
254
255	Float_t zCoor = rTMath::Tan(0.5TMath::Pi()-GetStripTheta(iplate, istrip))-
256	(ipadz-0.5)fgkZPadTMath::Cos(fAngles[iplate][istrip]/kRaddeg);
257	return zCoor;
258
259	}
260	//_____________________________________________________________________________
261	Int_t AliTOFGeometry::GetSector(Float_t *pos)
262	{
263	//
264	// Returns the Sector index
265	//
266
267	Int_t iSect = -1;
268
269	Float_t x = pos[0];
270	Float_t y = pos[1];
271
272	Float_t phi = TMath::ATan2(y,x);
273	if(phi<0.) phi=2.*TMath::Pi()+phi;
274	iSect = (Int_t) (phi*kRaddeg/fPhiSec);
275
276	return iSect;
277
278	}
279	//_____________________________________________________________________________
280	Int_t AliTOFGeometry::GetPadX(Float_t *pos)
281	{
282	//
283	// Returns the Pad index along X
284	//
285
286	Int_t iPadX = -1;
287
288	Float_t x = pos[0];
289	Float_t y = pos[1];
290	Float_t z = pos[2];
291
292	Int_t isector = GetSector(pos);
293	if(isector == -1){
294	cout << "Detector Index could not be determined" << endl;
295	return iPadX;}
296	Int_t iplate = GetPlate(pos);
297	if(iplate == -1){
298	cout << "Detector Index could not be determined" << endl;
299	return iPadX;}
300	Int_t istrip = GetStrip(pos);
301	if(istrip == -1){
302	cout << "Detector Index could not be determined" << endl;
303	return iPadX;}
304
305
306	Float_t rho=TMath::Sqrt(xx+yy);
307	Float_t phi = TMath::ATan2(y,x);
308	if(phi<0.) phi=2.*TMath::Pi()+phi;
309
310	// Get the local angle in the sector philoc
311	Float_t philoc = phikRaddeg-(isector+0.5)fPhiSec;
312	philoc*=TMath::Pi()/180.;
313	// theta projected on the median of the sector
314	Float_t theta = TMath::ATan2(rho*TMath::Cos(philoc),z);
315	// The radius r in xy plane:
316	Float_t r = (fgkRmin+fgkRmax)/2.+fHeights[iplate][istrip]+
317	(theta-GetStripTheta(iplate, istrip))/
318	(GetMaxStripTheta(iplate, istrip)-GetMinStripTheta(iplate, istrip))
319	* 2.fgkZPadTMath::Sin(fAngles[iplate][istrip]/kRaddeg)-0.25;
320
321	// Find out distance projected onto the strip plane
322	Float_t d = (rTMath::Tan(philoc)+(fgkNpadXfgkXPad)*0.5);
323
324	iPadX = (Int_t) ( d/fgkXPad);
325	return iPadX;
326
327	}
328	//_____________________________________________________________________________
329	Int_t AliTOFGeometry::GetPlate(Float_t *pos)
330	{
331	//
332	// Returns the Plate index
333	//
334	Int_t iPlate=-1;
335
336	Int_t isector = GetSector(pos);
337	if(isector == -1){
338	cout << "Detector Index could not be determined" << endl;
339	return iPlate;}
340
341	Float_t x = pos[0];
342	Float_t y = pos[1];
343	Float_t z = pos[2];
344
345	Float_t rho=TMath::Sqrt(xx+yy);
346	Float_t phi=TMath::ATan2(y,x);
347	if(phi<0) phi=2.*TMath::Pi()+phi;
348	// Get the local angle in the sector philoc
349	Float_t philoc = phikRaddeg-(isector+0.5)fPhiSec;
350	philoc*=TMath::Pi()/180.;
351	// theta projected on the median of the sector
352	Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z);
353
354	for (Int_t i=0; i<fgkNPlates; i++){
355	if ( GetMaxPlateTheta(i) >= theta &&
356	GetMinPlateTheta(i) <= theta)iPlate=i;
357	}
358
359	return iPlate;
360
361	}
362	//_____________________________________________________________________________
363	Int_t AliTOFGeometry::GetStrip(Float_t *pos)
364	{
365	//
366	// Returns the Strip index
367	//
368
369	Int_t iStrip=-1;
370
371
372	Int_t isector = GetSector(pos);
373	if(isector == -1){
374	cout << "Detector Index could not be determined" << endl;
375	return iStrip;}
376	Int_t iplate = GetPlate(pos);
377	if(iplate == -1){
378	cout << "Detector Index could not be determined" << endl;
379	return iStrip;}
380
381
382	Float_t x = pos[0];
383	Float_t y = pos[1];
384	Float_t z = pos[2];
385
386	Int_t nstrips=0;
387	if(iplate==0 \|\| iplate == 4)nstrips=fgkNStripC;
388	if(iplate==1 \|\| iplate == 3)nstrips=fgkNStripB;
389	if(iplate==2) nstrips=fgkNStripA;
390
391	Float_t rho=TMath::Sqrt(xx+yy);
392	Float_t phi=TMath::ATan2(y,x);
393	if(phi<0) phi=2.*TMath::Pi()+phi;
394	// Get the local angle in the sector philoc
395	Float_t philoc = phikRaddeg-(isector+0.5)fPhiSec;
396	philoc*=TMath::Pi()/180.;
397	// theta projected on the median of the sector
398	Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z);
399
400	for (Int_t istrip=0; istrip<nstrips; istrip++){
401
402	if(
403	GetMaxStripTheta(iplate,istrip) >= theta
404	&&
405	GetMinStripTheta(iplate,istrip) <= theta ) iStrip = istrip;
406
407	}
408
409	return iStrip;
410	}
411	//_____________________________________________________________________________
412	Int_t AliTOFGeometry::GetPadZ(Float_t *pos)
413	{
414	//
415	// Returns the Pad index along Z
416	//
417	Int_t iPadZ = -1;
418
419	Int_t isector = GetSector(pos);
420	if(isector == -1){
421	cout << "Detector Index could not be determined" << endl;
422	return iPadZ;}
423	Int_t iplate = GetPlate(pos);
424	if(iplate == -1){
425	cout << "Detector Index could not be determined" << endl;
426	return iPadZ;}
427	Int_t istrip = GetStrip(pos);
428	if(istrip == -1){
429	cout << "Detector Index could not be determined" << endl;
430	return iPadZ;}
431
432
433	Float_t x = pos[0];
434	Float_t y = pos[1];
435	Float_t z = pos[2];
436
437	Float_t rho=TMath::Sqrt(xx+yy);
438	Float_t phi=TMath::ATan2(y,x);
439	if(phi<0) phi=2.*TMath::Pi()+phi;
440	Float_t philoc = phikRaddeg-(isector+0.5)fPhiSec;
441	philoc*=TMath::Pi()/180.;
442	Float_t theta=TMath::ATan2(rho*TMath::Cos(philoc),z);
443
444	if (theta >= GetStripTheta(iplate, istrip))iPadZ=1;
445	else iPadZ=0;
446
447	return iPadZ;
448	}
449	//_____________________________________________________________________________
450	Float_t AliTOFGeometry::GetMinPlateTheta(Int_t iPlate)
451	{
452	//
453	// Returns the minimum theta angle of a given plate iPlate (rad)
454	//
455
456
457	Int_t index=0;
458
459	Float_t delta =0.;
460	if(iPlate==0)delta = -1. ;
461	if(iPlate==1)delta = -0.5;
462	if(iPlate==3)delta = +0.5;
463	if(iPlate==4)delta = +1. ;
464
465	Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta;
466	Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index];
467	z =z+fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg);
468	r =r-fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg);
469
470	Float_t thmin = 0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin;
471	return thmin;
472
473	}
474	//_____________________________________________________________________________
475	Float_t AliTOFGeometry::GetMaxPlateTheta(Int_t iPlate)
476	{
477	//
478	// Returns the maximum theta angle of a given plate iPlate (rad)
479
480	Int_t index=0;
481	if(iPlate==0 \|\|iPlate == 4)index=fgkNStripC-1;
482	if(iPlate==1 \|\|iPlate == 3)index=fgkNStripB-1;
483	if(iPlate==2) index=fgkNStripA-1;
484
485	Float_t delta =0.;
486	if(iPlate==0)delta = -1. ;
487	if(iPlate==1)delta = -0.5;
488	if(iPlate==3)delta = +0.5;
489	if(iPlate==4)delta = +1. ;
490
491	Float_t z=(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][index]/kRaddeg)+delta;
492	Float_t r=(fgkRmin+fgkRmax)/2.+fHeights[iPlate][index];
493	z =z-fgkZPad*TMath::Cos(fAngles[iPlate][index]/kRaddeg);
494	r= r+fgkZPad*TMath::Sin(fAngles[iPlate][index]/kRaddeg);
495
496	Float_t thmax = 0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax;
497	return thmax;
498
499	}
500	//_____________________________________________________________________________
501	Float_t AliTOFGeometry::GetMaxStripTheta(Int_t iPlate, Int_t iStrip)
502	{
503	//
504	// Returns the maximum theta angle of a given strip iStrip (rad)
505	//
506
507
508	Float_t delta =0.;
509	if(iPlate==0)delta = -1. ;
510	if(iPlate==1)delta = -0.5;
511	if(iPlate==3)delta = +0.5;
512	if(iPlate==4)delta = +1. ;
513
514	Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip];
515	Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta;
516	z = z-fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg);
517	r = r+fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg);
518	Float_t thmax =0.5*TMath::Pi()-TMath::ATan(z/r)+fgkDprecMax;
519	return thmax;
520
521	}
522
523	//_____________________________________________________________________________
524	Float_t AliTOFGeometry::GetMinStripTheta(Int_t iPlate, Int_t iStrip)
525	{
526	//
527	// Returns the minimum theta angle of a given Strip iStrip (rad)
528	//
529
530
531	Float_t delta =0.;
532	if(iPlate==0)delta = -1. ;
533	if(iPlate==1)delta = -0.5;
534	if(iPlate==3)delta = +0.5;
535	if(iPlate==4)delta = +1. ;
536
537
538	Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip];
539	Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta;
540	z =z+fgkZPad*TMath::Cos(fAngles[iPlate][iStrip]/kRaddeg);
541	r =r-fgkZPad*TMath::Sin(fAngles[iPlate][iStrip]/kRaddeg);
542	Float_t thmin =0.5*TMath::Pi()-TMath::ATan(z/r)-fgkDprecMin;
543
544	return thmin;
545
546	}
547
548
549	//_____________________________________________________________________________
550	Float_t AliTOFGeometry::GetStripTheta(Int_t iPlate, Int_t iStrip)
551	{
552	//
553	// returns the median theta angle of a given strip iStrip (rad)
554	//
555
556
557	Float_t delta =0.;
558	if(iPlate==0)delta = -1. ;
559	if(iPlate==1)delta = -0.5;
560	if(iPlate==3)delta = +0.5;
561	if(iPlate==4)delta = +1. ;
562
563	Float_t r =(fgkRmin+fgkRmax)/2.+fHeights[iPlate][iStrip];
564	Float_t z =(fgkRmin+2.)*TMath::Tan(fAngles[iPlate][iStrip]/kRaddeg)+delta;
565	Float_t theta =0.5*TMath::Pi()-TMath::ATan(z/r);
566	if(iPlate != 2){
567	if(theta > 0.5*TMath::Pi() )theta+=fgkDprecCen;
568	if(theta < 0.5*TMath::Pi() )theta-=fgkDprecCen;
569	}
570	return theta;
571	}
572
573
574