// $Id: ESystemOfUnits.hh,v 1.3 2005/06/05 14:09:23 thea Exp $
// Daniel De Marco - taken from CLHEP and adapted for ESAF

/*****************************************************************************
 * ESAF: Euso Simulation and Analysis Framework                              *
 *                                                                           *
 *  Id: ESystemOfUnits                                                       *
 *  Package: SimuEvent                                                       *
 *  Coordinator: Alessandro.Thea                                             *
 *                                                                           *
 *****************************************************************************/

#ifndef __E_HEP_SYSTEM_OF_UNITS_HH__
#define __E_HEP_SYSTEM_OF_UNITS_HH__

namespace sou {

// 
// Length [L]
//
static const double millimeter  = 1.;                        
static const double millimeter2 = millimeter*millimeter;
static const double millimeter3 = millimeter*millimeter*millimeter;

static const double centimeter  = 10.*millimeter;   
static const double centimeter2 = centimeter*centimeter;
static const double centimeter3 = centimeter*centimeter*centimeter;

static const double meter  = 1000.*millimeter;                  
static const double meter2 = meter*meter;
static const double meter3 = meter*meter*meter;

static const double kilometer = 1000.*meter;                   
static const double kilometer2 = kilometer*kilometer;
static const double kilometer3 = kilometer*kilometer*kilometer;

static const double micrometer = 1.e-6 *meter;             
static const double  nanometer = 1.e-9 *meter;
static const double         nm = nanometer;
static const double  angstrom  = 1.e-10*meter;
static const double  fermi     = 1.e-15*meter;

static const double      barn = 1.e-28*meter2;
static const double millibarn = 1.e-3 *barn;
static const double microbarn = 1.e-6 *barn;
static const double  nanobarn = 1.e-9 *barn;
static const double  picobarn = 1.e-12*barn;

// symbols
static const double mm  = millimeter;                        
static const double mm2 = millimeter2;
static const double mm3 = millimeter3;

static const double cm  = centimeter;   
static const double cm2 = centimeter2;
static const double cm3 = centimeter3;

static const double m  = meter;                  
static const double m2 = meter2;
static const double m3 = meter3;

static const double km  = kilometer;                   
static const double km2 = kilometer2;
static const double km3 = kilometer3;

//
// Angle
//
static const double radian      = 1.;                  
static const double milliradian = 1.e-3*radian;
static const double degree = (3.14159265358979323846/180.0)*radian;

static const double   steradian = 1.;
	
// symbols
static const double rad  = radian;	
static const double mrad = milliradian;
static const double sr   = steradian;
static const double deg  = degree;

//
// Time [T]
//
static const double nanosecond  = 1.;
static const double second      = 1.e+9 *nanosecond;
static const double millisecond = 1.e-3 *second;
static const double microsecond = 1.e-6 *second;
static const double  picosecond = 1.e-12*second;

static const double hertz = 1./second;
static const double kilohertz = 1.e+3*hertz;
static const double megahertz = 1.e+6*hertz;

// symbols
static const double ns = nanosecond;			
static const double  s = second;
static const double ms = millisecond;

//
// Electric charge [Q]
//
static const double eplus = 1. ;		// positron charge
static const double e_SI  = 1.60217733e-19;	// positron charge in coulomb
static const double coulomb = eplus/e_SI;	// coulomb = 6.24150 e+18 * eplus

//
// Energy [E]
//
static const double  megaelectronvolt = 1. ;
static const double      electronvolt = 1.e-6*megaelectronvolt;
static const double  kiloelectronvolt = 1.e-3*megaelectronvolt;
static const double  gigaelectronvolt = 1.e+3*megaelectronvolt;
static const double  teraelectronvolt = 1.e+6*megaelectronvolt;
static const double  petaelectronvolt = 1.e+9*megaelectronvolt;
static const double   exaelectronvolt = 1.e+12*megaelectronvolt;
static const double zettaelectronvolt = 1.e+15*megaelectronvolt;

static const double joule = electronvolt/e_SI;	// joule = 6.24150 e+12 * MeV

// symbols
static const double MeV = megaelectronvolt;
static const double  eV = electronvolt;
static const double keV = kiloelectronvolt;
static const double GeV = gigaelectronvolt;
static const double TeV = teraelectronvolt;
static const double PeV = petaelectronvolt;
static const double EeV = exaelectronvolt;
static const double ZeV = zettaelectronvolt;

//
// Mass [E][T^2][L^-2]
//
static const double  kilogram = joule*second*second/(meter*meter);   
static const double      gram = 1.e-3*kilogram;
static const double milligram = 1.e-3*gram;

// symbols
static const double  kg = kilogram;
static const double   g = gram;
static const double  mg = milligram;

//
// Power [E][T^-1]
//
static const double watt = joule/second;	// watt = 6.24150 e+3 * MeV/ns

//
// Force [E][L^-1]
//
static const double newton = joule/meter;	// newton = 6.24150 e+9 * MeV/mm

//
// Pressure [E][L^-3]
//
static const double pascal     = newton/m2;	    // pascal = 6.24150 e+3 * MeV/mm3
static const double bar        = 100000*pascal; // bar    = 6.24150 e+8 * MeV/mm3
static const double atmosphere = 101325*pascal; // atm    = 6.32420 e+8 * MeV/mm3

//
// Electric current [Q][T^-1]
//
static const double      ampere = coulomb/second; // ampere = 6.24150 e+9 * eplus/ns
static const double milliampere = 1.e-3*ampere;
static const double microampere = 1.e-6*ampere;
static const double  nanoampere = 1.e-9*ampere;

//
// Electric potential [E][Q^-1]
//
static const double megavolt = megaelectronvolt/eplus;
static const double kilovolt = 1.e-3*megavolt;
static const double     volt = 1.e-6*megavolt;

//
// Electric resistance [E][T][Q^-2]
//
static const double ohm = volt/ampere;	// ohm = 1.60217e-16*(MeV/eplus)/(eplus/ns)

//
// Electric capacitance [Q^2][E^-1]
//
static const double farad = coulomb/volt;	// farad = 6.24150e+24 * eplus/Megavolt
static const double millifarad = 1.e-3*farad;
static const double microfarad = 1.e-6*farad;
static const double  nanofarad = 1.e-9*farad;
static const double  picofarad = 1.e-12*farad;

//
// Magnetic Flux [T][E][Q^-1]
//
static const double weber = volt*second;	// weber = 1000*megavolt*ns

//
// Magnetic Field [T][E][Q^-1][L^-2]
//
static const double tesla     = volt*second/meter2;	// tesla =0.001*megavolt*ns/mm2

static const double gauss     = 1.e-4*tesla;
static const double kilogauss = 1.e-1*tesla;

//
// Inductance [T^2][E][Q^-2]
//
static const double henry = weber/ampere;	// henry = 1.60217e-7*MeV*(ns/eplus)**2

//
// Temperature
//
static const double kelvin = 1.;

//
// Amount of substance
//
static const double mole = 1.;

//
// Activity [T^-1]
//
static const double becquerel = 1./second ;
static const double curie = 3.7e+10 * becquerel;

//
// Absorbed dose [L^2][T^-2]
//
static const double gray = joule/kilogram ;

//
// Luminous intensity [I]
//
static const double candela = 1.;

//
// Luminous flux [I]
//
static const double lumen = candela*steradian;

//
// Illuminance [I][L^-2]
//
static const double lux = lumen/meter2;

//
// Miscellaneous
//
static const double perCent     = 0.01 ;
static const double perThousand = 0.001;
static const double perMillion  = 0.000001;

}

#endif /* __E_HEP_SYSTEM_OF_UNITS_HH__ */