// -*- C++ -*- // ---------------------------------------------------------------------- // 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 // 31.01.06 kilogray, milligray, microgray // 29.04.08 use PDG 2006 value of e_SI // 03.11.08 use PDG 2008 value of e_SI // 19.08.15 added liter and its sub units (mma) // 12.01.16 added symbols for microsecond (us) and picosecond (ps) (mma) // 17.07.20 use PDG 2019 value of e_SI // 06.05.21 added minute, hour, day, year and millielectronvolt (mma) #ifndef HEP_SYSTEM_OF_UNITS_H #define HEP_SYSTEM_OF_UNITS_H namespace CLHEP { // // // static constexpr double pi = 3.14159265358979323846; static constexpr double twopi = 2*pi; static constexpr double halfpi = pi/2; static constexpr double pi2 = pi*pi; // // Length [L] // static constexpr double millimeter = 1.; static constexpr double millimeter2 = millimeter*millimeter; static constexpr double millimeter3 = millimeter*millimeter*millimeter; static constexpr double centimeter = 10.*millimeter; static constexpr double centimeter2 = centimeter*centimeter; static constexpr double centimeter3 = centimeter*centimeter*centimeter; static constexpr double meter = 1000.*millimeter; static constexpr double meter2 = meter*meter; static constexpr double meter3 = meter*meter*meter; static constexpr double kilometer = 1000.*meter; static constexpr double kilometer2 = kilometer*kilometer; static constexpr double kilometer3 = kilometer*kilometer*kilometer; static constexpr double parsec = 3.0856775807e+16*meter; static constexpr double micrometer = 1.e-6 *meter; static constexpr double nanometer = 1.e-9 *meter; static constexpr double angstrom = 1.e-10*meter; static constexpr double fermi = 1.e-15*meter; static constexpr double barn = 1.e-28*meter2; static constexpr double millibarn = 1.e-3 *barn; static constexpr double microbarn = 1.e-6 *barn; static constexpr double nanobarn = 1.e-9 *barn; static constexpr double picobarn = 1.e-12*barn; // symbols static constexpr double nm = nanometer; static constexpr double um = micrometer; static constexpr double mm = millimeter; static constexpr double mm2 = millimeter2; static constexpr double mm3 = millimeter3; static constexpr double cm = centimeter; static constexpr double cm2 = centimeter2; static constexpr double cm3 = centimeter3; static constexpr double liter = 1.e+3*cm3; static constexpr double L = liter; static constexpr double dL = 1.e-1*liter; static constexpr double cL = 1.e-2*liter; static constexpr double mL = 1.e-3*liter; static constexpr double m = meter; static constexpr double m2 = meter2; static constexpr double m3 = meter3; static constexpr double km = kilometer; static constexpr double km2 = kilometer2; static constexpr double km3 = kilometer3; static constexpr double pc = parsec; // // Angle // static constexpr double radian = 1.; static constexpr double milliradian = 1.e-3*radian; static constexpr double degree = (pi/180.0)*radian; static constexpr double steradian = 1.; // symbols static constexpr double rad = radian; static constexpr double mrad = milliradian; static constexpr double sr = steradian; static constexpr double deg = degree; // // Time [T] // static constexpr double nanosecond = 1.; static constexpr double second = 1.e+9 *nanosecond; static constexpr double millisecond = 1.e-3 *second; static constexpr double microsecond = 1.e-6 *second; static constexpr double picosecond = 1.e-12*second; static constexpr double minute = 60*second; static constexpr double hour = 60*minute; static constexpr double day = 24*hour; static constexpr double year = 365*day; static constexpr double hertz = 1./second; static constexpr double kilohertz = 1.e+3*hertz; static constexpr double megahertz = 1.e+6*hertz; // symbols static constexpr double ns = nanosecond; static constexpr double s = second; static constexpr double ms = millisecond; static constexpr double us = microsecond; static constexpr double ps = picosecond; // // Electric charge [Q] // static constexpr double eplus = 1. ;// positron charge static constexpr double e_SI = 1.602176634e-19;// positron charge in coulomb static constexpr double coulomb = eplus/e_SI;// coulomb = 6.24150 e+18 * eplus // // Energy [E] // static constexpr double megaelectronvolt = 1. ; static constexpr double electronvolt = 1.e-6*megaelectronvolt; static constexpr double kiloelectronvolt = 1.e-3*megaelectronvolt; static constexpr double gigaelectronvolt = 1.e+3*megaelectronvolt; static constexpr double teraelectronvolt = 1.e+6*megaelectronvolt; static constexpr double petaelectronvolt = 1.e+9*megaelectronvolt; static constexpr double millielectronvolt = 1.e-9*megaelectronvolt; static constexpr double joule = electronvolt/e_SI;// joule = 6.24150 e+12 * MeV // symbols static constexpr double MeV = megaelectronvolt; static constexpr double eV = electronvolt; static constexpr double keV = kiloelectronvolt; static constexpr double GeV = gigaelectronvolt; static constexpr double TeV = teraelectronvolt; static constexpr double PeV = petaelectronvolt; // // Mass [E][T^2][L^-2] // static constexpr double kilogram = joule*second*second/(meter*meter); static constexpr double gram = 1.e-3*kilogram; static constexpr double milligram = 1.e-3*gram; // symbols static constexpr double kg = kilogram; static constexpr double g = gram; static constexpr double mg = milligram; // // Power [E][T^-1] // static constexpr double watt = joule/second;// watt = 6.24150 e+3 * MeV/ns // // Force [E][L^-1] // static constexpr double newton = joule/meter;// newton = 6.24150 e+9 * MeV/mm // // Pressure [E][L^-3] // #define pascal hep_pascal // a trick to avoid warnings static constexpr double hep_pascal = newton/m2; // pascal = 6.24150 e+3 * MeV/mm3 static constexpr double bar = 100000*pascal; // bar = 6.24150 e+8 * MeV/mm3 static constexpr double atmosphere = 101325*pascal; // atm = 6.32420 e+8 * MeV/mm3 // // Electric current [Q][T^-1] // static constexpr double ampere = coulomb/second; // ampere = 6.24150 e+9 * eplus/ns static constexpr double milliampere = 1.e-3*ampere; static constexpr double microampere = 1.e-6*ampere; static constexpr double nanoampere = 1.e-9*ampere; // // Electric potential [E][Q^-1] // static constexpr double megavolt = megaelectronvolt/eplus; static constexpr double kilovolt = 1.e-3*megavolt; static constexpr double volt = 1.e-6*megavolt; // // Electric resistance [E][T][Q^-2] // static constexpr double ohm = volt/ampere;// ohm = 1.60217e-16*(MeV/eplus)/(eplus/ns) // // Electric capacitance [Q^2][E^-1] // static constexpr double farad = coulomb/volt;// farad = 6.24150e+24 * eplus/Megavolt static constexpr double millifarad = 1.e-3*farad; static constexpr double microfarad = 1.e-6*farad; static constexpr double nanofarad = 1.e-9*farad; static constexpr double picofarad = 1.e-12*farad; // // Magnetic Flux [T][E][Q^-1] // static constexpr double weber = volt*second;// weber = 1000*megavolt*ns // // Magnetic Field [T][E][Q^-1][L^-2] // static constexpr double tesla = volt*second/meter2;// tesla =0.001*megavolt*ns/mm2 static constexpr double gauss = 1.e-4*tesla; static constexpr double kilogauss = 1.e-1*tesla; // // Inductance [T^2][E][Q^-2] // static constexpr double henry = weber/ampere;// henry = 1.60217e-7*MeV*(ns/eplus)**2 // // Temperature // static constexpr double kelvin = 1.; // // Amount of substance // static constexpr double mole = 1.; // // Activity [T^-1] // static constexpr double becquerel = 1./second ; static constexpr double curie = 3.7e+10 * becquerel; static constexpr double kilobecquerel = 1.e+3*becquerel; static constexpr double megabecquerel = 1.e+6*becquerel; static constexpr double gigabecquerel = 1.e+9*becquerel; static constexpr double millicurie = 1.e-3*curie; static constexpr double microcurie = 1.e-6*curie; static constexpr double Bq = becquerel; static constexpr double kBq = kilobecquerel; static constexpr double MBq = megabecquerel; static constexpr double GBq = gigabecquerel; static constexpr double Ci = curie; static constexpr double mCi = millicurie; static constexpr double uCi = microcurie; // // Absorbed dose [L^2][T^-2] // static constexpr double gray = joule/kilogram ; static constexpr double kilogray = 1.e+3*gray; static constexpr double milligray = 1.e-3*gray; static constexpr double microgray = 1.e-6*gray; // // Luminous intensity [I] // static constexpr double candela = 1.; // // Luminous flux [I] // static constexpr double lumen = candela*steradian; // // Illuminance [I][L^-2] // static constexpr double lux = lumen/meter2; // // Miscellaneous // static constexpr double perCent = 0.01 ; static constexpr double perThousand = 0.001; static constexpr double perMillion = 0.000001; } // namespace CLHEP #endif /* HEP_SYSTEM_OF_UNITS_H */