CLHEP/Units/SystemOfUnits.h
// -*- C++ -*-
// $Id: SystemOfUnits.h,v 1.11 2001/03/05 16:09:30 evc Exp $
// ----------------------------------------------------------------------
// HEP coherent system of Units
//
// This file has been provided to CLHEP by Geant4 (simulation toolkit for HEP).
//
// The basic units are :
// millimeter (millimeter)
// nanosecond (nanosecond)
// Mega electron Volt (MeV)
// positron charge (eplus)
// degree Kelvin (kelvin)
// the amount of substance (mole)
// luminous intensity (candela)
// radian (radian)
// steradian (steradian)
//
// Below is a non exhaustive list of derived and pratical units
// (i.e. mostly the SI units).
// You can add your own units.
//
// The SI numerical value of the positron charge is defined here,
// as it is needed for conversion factor : positron charge = e_SI (coulomb)
//
// The others physical constants are defined in the header file :
// PhysicalConstants.h
//
// Authors: M.Maire, S.Giani
//
// History:
//
// 06.02.96 Created.
// 28.03.96 Added miscellaneous constants.
// 05.12.97 E.Tcherniaev: Redefined pascal (to avoid warnings on WinNT)
// 20.05.98 names: meter, second, gram, radian, degree
// (from Brian.Lasiuk@yale.edu (STAR)). Added luminous units.
// 05.08.98 angstrom, picobarn, microsecond, picosecond, petaelectronvolt
// 01.03.01 parsec
#ifndef HEP_SYSTEM_OF_UNITS_H
#define HEP_SYSTEM_OF_UNITS_H
#include "CLHEP/config/CLHEP.h"
//
// Length [L]
//
static const HepDouble millimeter = 1.;
static const HepDouble millimeter2 = millimeter*millimeter;
static const HepDouble millimeter3 = millimeter*millimeter*millimeter;
static const HepDouble centimeter = 10.*millimeter;
static const HepDouble centimeter2 = centimeter*centimeter;
static const HepDouble centimeter3 = centimeter*centimeter*centimeter;
static const HepDouble meter = 1000.*millimeter;
static const HepDouble meter2 = meter*meter;
static const HepDouble meter3 = meter*meter*meter;
static const HepDouble kilometer = 1000.*meter;
static const HepDouble kilometer2 = kilometer*kilometer;
static const HepDouble kilometer3 = kilometer*kilometer*kilometer;
static const HepDouble parsec = 3.0856775807e+16*meter;
static const HepDouble micrometer = 1.e-6 *meter;
static const HepDouble nanometer = 1.e-9 *meter;
static const HepDouble angstrom = 1.e-10*meter;
static const HepDouble fermi = 1.e-15*meter;
static const HepDouble barn = 1.e-28*meter2;
static const HepDouble millibarn = 1.e-3 *barn;
static const HepDouble microbarn = 1.e-6 *barn;
static const HepDouble nanobarn = 1.e-9 *barn;
static const HepDouble picobarn = 1.e-12*barn;
// symbols
static const HepDouble mm = millimeter;
static const HepDouble mm2 = millimeter2;
static const HepDouble mm3 = millimeter3;
static const HepDouble cm = centimeter;
static const HepDouble cm2 = centimeter2;
static const HepDouble cm3 = centimeter3;
static const HepDouble m = meter;
static const HepDouble m2 = meter2;
static const HepDouble m3 = meter3;
static const HepDouble km = kilometer;
static const HepDouble km2 = kilometer2;
static const HepDouble km3 = kilometer3;
static const HepDouble pc = parsec;
//
// Angle
//
static const HepDouble radian = 1.;
static const HepDouble milliradian = 1.e-3*radian;
static const HepDouble degree = (3.14159265358979323846/180.0)*radian;
static const HepDouble steradian = 1.;
// symbols
static const HepDouble rad = radian;
static const HepDouble mrad = milliradian;
static const HepDouble sr = steradian;
static const HepDouble deg = degree;
//
// Time [T]
//
static const HepDouble nanosecond = 1.;
static const HepDouble second = 1.e+9 *nanosecond;
static const HepDouble millisecond = 1.e-3 *second;
static const HepDouble microsecond = 1.e-6 *second;
static const HepDouble picosecond = 1.e-12*second;
static const HepDouble hertz = 1./second;
static const HepDouble kilohertz = 1.e+3*hertz;
static const HepDouble megahertz = 1.e+6*hertz;
// symbols
static const HepDouble ns = nanosecond;
static const HepDouble s = second;
static const HepDouble ms = millisecond;
//
// Electric charge [Q]
//
static const HepDouble eplus = 1. ; // positron charge
static const HepDouble e_SI = 1.60217733e-19; // positron charge in coulomb
static const HepDouble coulomb = eplus/e_SI; // coulomb = 6.24150 e+18 * eplus
//
// Energy [E]
//
static const HepDouble megaelectronvolt = 1. ;
static const HepDouble electronvolt = 1.e-6*megaelectronvolt;
static const HepDouble kiloelectronvolt = 1.e-3*megaelectronvolt;
static const HepDouble gigaelectronvolt = 1.e+3*megaelectronvolt;
static const HepDouble teraelectronvolt = 1.e+6*megaelectronvolt;
static const HepDouble petaelectronvolt = 1.e+9*megaelectronvolt;
static const HepDouble joule = electronvolt/e_SI; // joule = 6.24150 e+12 * MeV
// symbols
static const HepDouble MeV = megaelectronvolt;
static const HepDouble eV = electronvolt;
static const HepDouble keV = kiloelectronvolt;
static const HepDouble GeV = gigaelectronvolt;
static const HepDouble TeV = teraelectronvolt;
static const HepDouble PeV = petaelectronvolt;
//
// Mass [E][T^2][L^-2]
//
static const HepDouble kilogram = joule*second*second/(meter*meter);
static const HepDouble gram = 1.e-3*kilogram;
static const HepDouble milligram = 1.e-3*gram;
// symbols
static const HepDouble kg = kilogram;
static const HepDouble g = gram;
static const HepDouble mg = milligram;
//
// Power [E][T^-1]
//
static const HepDouble watt = joule/second; // watt = 6.24150 e+3 * MeV/ns
//
// Force [E][L^-1]
//
static const HepDouble newton = joule/meter; // newton = 6.24150 e+9 * MeV/mm
//
// Pressure [E][L^-3]
//
#define pascal hep_pascal // a trick to avoid warnings
static const HepDouble hep_pascal = newton/m2; // pascal = 6.24150 e+3 * MeV/mm3
static const HepDouble bar = 100000*pascal; // bar = 6.24150 e+8 * MeV/mm3
static const HepDouble atmosphere = 101325*pascal; // atm = 6.32420 e+8 * MeV/mm3
//
// Electric current [Q][T^-1]
//
static const HepDouble ampere = coulomb/second; // ampere = 6.24150 e+9 * eplus/ns
static const HepDouble milliampere = 1.e-3*ampere;
static const HepDouble microampere = 1.e-6*ampere;
static const HepDouble nanoampere = 1.e-9*ampere;
//
// Electric potential [E][Q^-1]
//
static const HepDouble megavolt = megaelectronvolt/eplus;
static const HepDouble kilovolt = 1.e-3*megavolt;
static const HepDouble volt = 1.e-6*megavolt;
//
// Electric resistance [E][T][Q^-2]
//
static const HepDouble ohm = volt/ampere; // ohm = 1.60217e-16*(MeV/eplus)/(eplus/ns)
//
// Electric capacitance [Q^2][E^-1]
//
static const HepDouble farad = coulomb/volt; // farad = 6.24150e+24 * eplus/Megavolt
static const HepDouble millifarad = 1.e-3*farad;
static const HepDouble microfarad = 1.e-6*farad;
static const HepDouble nanofarad = 1.e-9*farad;
static const HepDouble picofarad = 1.e-12*farad;
//
// Magnetic Flux [T][E][Q^-1]
//
static const HepDouble weber = volt*second; // weber = 1000*megavolt*ns
//
// Magnetic Field [T][E][Q^-1][L^-2]
//
static const HepDouble tesla = volt*second/meter2; // tesla =0.001*megavolt*ns/mm2
static const HepDouble gauss = 1.e-4*tesla;
static const HepDouble kilogauss = 1.e-1*tesla;
//
// Inductance [T^2][E][Q^-2]
//
static const HepDouble henry = weber/ampere; // henry = 1.60217e-7*MeV*(ns/eplus)**2
//
// Temperature
//
static const HepDouble kelvin = 1.;
//
// Amount of substance
//
static const HepDouble mole = 1.;
//
// Activity [T^-1]
//
static const HepDouble becquerel = 1./second ;
static const HepDouble curie = 3.7e+10 * becquerel;
//
// Absorbed dose [L^2][T^-2]
//
static const HepDouble gray = joule/kilogram ;
//
// Luminous intensity [I]
//
static const HepDouble candela = 1.;
//
// Luminous flux [I]
//
static const HepDouble lumen = candela*steradian;
//
// Illuminance [I][L^-2]
//
static const HepDouble lux = lumen/meter2;
//
// Miscellaneous
//
static const HepDouble perCent = 0.01 ;
static const HepDouble perThousand = 0.001;
static const HepDouble perMillion = 0.000001;
#endif /* HEP_SYSTEM_OF_UNITS_H */
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