PndFsmDrcBarrel.h

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//--------------------------------------------------------------------------
// File and Version Information:
//      $Id: FsmDrcBarrel.hh,v 1.3 2006/07/13 10:43:45 klausg Exp $
//
// Description:
//      Class FsmDrc
//
//  Implementation of the barrel DIRC for the Fast Sim Detectors
//
//  This software was developed for the PANDA collaboration.  If you
//  use all or part of it, please give an appropriate acknowledgement.
//
// Author List:
//      Klaus Goetzen                    Original Author
//
// Copyright Information:
//      Copyright (C) 2006              GSI
//
//------------------------------------------------------------------------

#ifndef PNDFSMDRCBARREL_H
#define PNDFSMDRCBARREL_H

//----------------------
// Base Class Headers --
//----------------------

//-------------------------------
// Collaborating class Headers --
//-------------------------------
#include <iosfwd>
#include "ArgList.h"
#include "PndFsmAbsDet.h"

//--------------------------------------------
// Collaborating class forward declarations --
// -------------------------------------------
class PndFsmTrack;
class PndFsmResponse;
class TH2F;

class PndFsmDrcBarrel : public PndFsmAbsDet {
 public:
  //--------------------
  // Public interface --
  //--------------------

  //
  // Constructors
  //

  PndFsmDrcBarrel();
  PndFsmDrcBarrel(ArgList &par);
  virtual ~PndFsmDrcBarrel();

  virtual PndFsmResponse *respond(PndFsmTrack *t);

 private:
  bool detected(PndFsmTrack *t) const;
  double compThetaC(double p, double m);
  double gauss(double x, double x0, double s);

  void initParameters();
  void print(std::ostream &o);
  bool setParameter(std::string &name, double value);
  bool setParameter(std::string &name, std::string &value);

  bool readParameters();

  //
  //  Modifiers
  //

  TH2F *trapfrac[5];

  double _thtMin;           // spatial coverage
  double _thtMax;           //    "
  double _radiationLength;  // material budget
  double _pmin;             // minimum p_t to reach DIRC
  double _dthtc;            // resolution for tht_C for single photon (-> res=dthtc/sqrt(nPhot) )
  double _nPhotMin;         // minimum number of photons cutoff
  double _nRefrac;          // refraction index of radiator
  double _Bfield;           // B field strength [T]
  double _effNPhotons;      // overall efficiency for photon detection
  double _rBarrel;          // radius of DIRC barrel
  double _dSlab;            // thickness of radiator bars/slabs
  double _dp;               // momentum resolution
  double _trap;             // avg trapping fraction (only when file below doesn't exist)
  std::string _parFileName; // this file contains root histograms with the trapping fractions
};

#endif