#ifndef _Hector_parameters_
#define _Hector_parameters_

/*
---- Hector the simulator ----
   A fast simulator of particles through generic beamlines.
   J. de Favereau, X. Rouby ~~~ hector_devel@cp3.phys.ucl.ac.be

        http://www.fynu.ucl.ac.be/hector.html
	J.~de Favereau, X.~Rouby and K.~Piotrzkowski, 
        Hector, a fast simulator for the transport of particles in beamlines,
	JINST 2, P09005 (2007)
	arXiv:0707.1198 [physics.acc-ph]

   Centre de Physique des Particules et de Phénoménologie (CP3)
   Université Catholique de Louvain (UCL)
*/

/// \file H_Parameters.h
/// \brief Class aiming at gathering all parameters that must be defined.
///
/// Units : angles [\f$ \mu \f$rad], distances [\f$ \mu \f$m], energies [GeV], c=[1].

#include <cmath>

/* from physics and maths */
   /// proton mass [GeV]
const double MP=0.93827;
   /// proton charge [e]
const double QP=1.;
   /// pi
#ifndef __PI__ 
#define __PI__
const double PI=acos(-1.); 
#endif
   /// conversion factor for \f$\mu\f$rad <-> rad
const double URAD=1000000.;

/* beam parameters */
   /// beam nominal energy in GeV
const double BE=7000.;
   /// beam energy divergence, in GeV
const double SBE=0.79;
   /// beam nominal energy in TeV
const double BETEV=7.;
   /// beam S @ IP
const double PS=0.;
   /// beam X @ IP
const double PX=-500.;    
   /// beam Y @ IP
const double PY=0.;
   /// beam longitudinal dispersion
const double SS=0.;
   /// beam lateral width SX @ IP
const double SX=16.63;
   /// beam lateral width SY @ IP
const double SY=16.63;
   /// beam transverse direction angle TX @ IP
const double TX=0.;
   /// beam transverse direction angle TY @ IP
const double TY=0.;
   /// beam angular divergence STX @ IP
const double STX=30.23;
   /// beam angular divergence STY @ IP
const double STY=30.23;
	/// half crossing angle at IP [\f$ \mu \f$RAD]
const double CRANG=142.5;

// local defines, used in H_BeamParticle & H_OpticalElements
#define LENGTH_VEC 5
#define INDEX_X 0
#define INDEX_TX 1
#define INDEX_Y 2
#define INDEX_TY 3
#define INDEX_S 4
// (x,theta_x,y,theta_y,s)
//

/// include Pythia libraries ? (not included on some ROOT installations)
//#define _include_pythia_

const unsigned int TM = 0; // not used anymore. left for backward compatibility
const unsigned int AM = 1; // not used anymore. left for backward compatibility


/* display parameters */
   /// Verbose mode ?
const bool VERBOSE=false; 

#endif