Gabriele Cosmo
326 lines
10 KiB
C++
326 lines
10 KiB
C++
// -*- C++ -*-
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// ----------------------------------------------------------------------
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// HEP coherent system of Units
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//
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// This file has been provided to CLHEP by Geant4 (simulation toolkit for HEP).
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//
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// The basic units are :
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// millimeter (millimeter)
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// nanosecond (nanosecond)
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// Mega electron Volt (MeV)
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// positron charge (eplus)
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// degree Kelvin (kelvin)
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// the amount of substance (mole)
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// luminous intensity (candela)
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// radian (radian)
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// steradian (steradian)
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//
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// Below is a non exhaustive list of derived and pratical units
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// (i.e. mostly the SI units).
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// You can add your own units.
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//
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// The SI numerical value of the positron charge is defined here,
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// as it is needed for conversion factor : positron charge = e_SI (coulomb)
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//
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// The others physical constants are defined in the header file :
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// PhysicalConstants.h
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//
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// Authors: M.Maire, S.Giani
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//
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// History:
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//
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// 06.02.96 Created.
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// 28.03.96 Added miscellaneous constants.
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// 05.12.97 E.Tcherniaev: Redefined pascal (to avoid warnings on WinNT)
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// 20.05.98 names: meter, second, gram, radian, degree
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// (from Brian.Lasiuk@yale.edu (STAR)). Added luminous units.
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// 05.08.98 angstrom, picobarn, microsecond, picosecond, petaelectronvolt
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// 01.03.01 parsec
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// 31.01.06 kilogray, milligray, microgray
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// 29.04.08 use PDG 2006 value of e_SI
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// 03.11.08 use PDG 2008 value of e_SI
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// 19.08.15 added liter and its sub units (mma)
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// 12.01.16 added symbols for microsecond (us) and picosecond (ps) (mma)
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// 17.07.20 use PDG 2019 value of e_SI
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// 06.05.21 added minute, hour, day, year and millielectronvolt (mma)
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#ifndef HEP_SYSTEM_OF_UNITS_H
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#define HEP_SYSTEM_OF_UNITS_H
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namespace CLHEP {
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//
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//
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//
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static constexpr double pi = 3.14159265358979323846;
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static constexpr double twopi = 2*pi;
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static constexpr double halfpi = pi/2;
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static constexpr double pi2 = pi*pi;
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//
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// Length [L]
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//
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static constexpr double millimeter = 1.;
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static constexpr double millimeter2 = millimeter*millimeter;
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static constexpr double millimeter3 = millimeter*millimeter*millimeter;
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static constexpr double centimeter = 10.*millimeter;
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static constexpr double centimeter2 = centimeter*centimeter;
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static constexpr double centimeter3 = centimeter*centimeter*centimeter;
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static constexpr double meter = 1000.*millimeter;
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static constexpr double meter2 = meter*meter;
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static constexpr double meter3 = meter*meter*meter;
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static constexpr double kilometer = 1000.*meter;
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static constexpr double kilometer2 = kilometer*kilometer;
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static constexpr double kilometer3 = kilometer*kilometer*kilometer;
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static constexpr double parsec = 3.0856775807e+16*meter;
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static constexpr double micrometer = 1.e-6 *meter;
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static constexpr double nanometer = 1.e-9 *meter;
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static constexpr double angstrom = 1.e-10*meter;
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static constexpr double fermi = 1.e-15*meter;
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static constexpr double barn = 1.e-28*meter2;
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static constexpr double millibarn = 1.e-3 *barn;
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static constexpr double microbarn = 1.e-6 *barn;
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static constexpr double nanobarn = 1.e-9 *barn;
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static constexpr double picobarn = 1.e-12*barn;
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// symbols
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static constexpr double nm = nanometer;
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static constexpr double um = micrometer;
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static constexpr double mm = millimeter;
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static constexpr double mm2 = millimeter2;
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static constexpr double mm3 = millimeter3;
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static constexpr double cm = centimeter;
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static constexpr double cm2 = centimeter2;
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static constexpr double cm3 = centimeter3;
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static constexpr double liter = 1.e+3*cm3;
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static constexpr double L = liter;
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static constexpr double dL = 1.e-1*liter;
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static constexpr double cL = 1.e-2*liter;
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static constexpr double mL = 1.e-3*liter;
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static constexpr double m = meter;
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static constexpr double m2 = meter2;
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static constexpr double m3 = meter3;
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static constexpr double km = kilometer;
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static constexpr double km2 = kilometer2;
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static constexpr double km3 = kilometer3;
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static constexpr double pc = parsec;
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//
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// Angle
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//
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static constexpr double radian = 1.;
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static constexpr double milliradian = 1.e-3*radian;
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static constexpr double degree = (pi/180.0)*radian;
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static constexpr double steradian = 1.;
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// symbols
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static constexpr double rad = radian;
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static constexpr double mrad = milliradian;
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static constexpr double sr = steradian;
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static constexpr double deg = degree;
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//
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// Time [T]
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//
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static constexpr double nanosecond = 1.;
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static constexpr double second = 1.e+9 *nanosecond;
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static constexpr double millisecond = 1.e-3 *second;
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static constexpr double microsecond = 1.e-6 *second;
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static constexpr double picosecond = 1.e-12*second;
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static constexpr double minute = 60*second;
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static constexpr double hour = 60*minute;
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static constexpr double day = 24*hour;
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static constexpr double year = 365*day;
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static constexpr double hertz = 1./second;
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static constexpr double kilohertz = 1.e+3*hertz;
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static constexpr double megahertz = 1.e+6*hertz;
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// symbols
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static constexpr double ns = nanosecond;
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static constexpr double s = second;
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static constexpr double ms = millisecond;
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static constexpr double us = microsecond;
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static constexpr double ps = picosecond;
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//
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// Electric charge [Q]
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//
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static constexpr double eplus = 1. ;// positron charge
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static constexpr double e_SI = 1.602176634e-19;// positron charge in coulomb
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static constexpr double coulomb = eplus/e_SI;// coulomb = 6.24150 e+18 * eplus
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//
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// Energy [E]
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//
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static constexpr double megaelectronvolt = 1. ;
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static constexpr double electronvolt = 1.e-6*megaelectronvolt;
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static constexpr double kiloelectronvolt = 1.e-3*megaelectronvolt;
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static constexpr double gigaelectronvolt = 1.e+3*megaelectronvolt;
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static constexpr double teraelectronvolt = 1.e+6*megaelectronvolt;
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static constexpr double petaelectronvolt = 1.e+9*megaelectronvolt;
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static constexpr double millielectronvolt = 1.e-9*megaelectronvolt;
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static constexpr double joule = electronvolt/e_SI;// joule = 6.24150 e+12 * MeV
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// symbols
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static constexpr double MeV = megaelectronvolt;
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static constexpr double eV = electronvolt;
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static constexpr double keV = kiloelectronvolt;
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static constexpr double GeV = gigaelectronvolt;
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static constexpr double TeV = teraelectronvolt;
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static constexpr double PeV = petaelectronvolt;
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//
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// Mass [E][T^2][L^-2]
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//
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static constexpr double kilogram = joule*second*second/(meter*meter);
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static constexpr double gram = 1.e-3*kilogram;
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static constexpr double milligram = 1.e-3*gram;
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// symbols
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static constexpr double kg = kilogram;
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static constexpr double g = gram;
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static constexpr double mg = milligram;
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//
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// Power [E][T^-1]
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//
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static constexpr double watt = joule/second;// watt = 6.24150 e+3 * MeV/ns
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//
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// Force [E][L^-1]
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//
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static constexpr double newton = joule/meter;// newton = 6.24150 e+9 * MeV/mm
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//
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// Pressure [E][L^-3]
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//
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#define pascal hep_pascal // a trick to avoid warnings
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static constexpr double hep_pascal = newton/m2; // pascal = 6.24150 e+3 * MeV/mm3
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static constexpr double bar = 100000*pascal; // bar = 6.24150 e+8 * MeV/mm3
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static constexpr double atmosphere = 101325*pascal; // atm = 6.32420 e+8 * MeV/mm3
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//
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// Electric current [Q][T^-1]
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//
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static constexpr double ampere = coulomb/second; // ampere = 6.24150 e+9 * eplus/ns
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static constexpr double milliampere = 1.e-3*ampere;
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static constexpr double microampere = 1.e-6*ampere;
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static constexpr double nanoampere = 1.e-9*ampere;
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//
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// Electric potential [E][Q^-1]
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//
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static constexpr double megavolt = megaelectronvolt/eplus;
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static constexpr double kilovolt = 1.e-3*megavolt;
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static constexpr double volt = 1.e-6*megavolt;
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//
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// Electric resistance [E][T][Q^-2]
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//
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static constexpr double ohm = volt/ampere;// ohm = 1.60217e-16*(MeV/eplus)/(eplus/ns)
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//
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// Electric capacitance [Q^2][E^-1]
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//
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static constexpr double farad = coulomb/volt;// farad = 6.24150e+24 * eplus/Megavolt
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static constexpr double millifarad = 1.e-3*farad;
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static constexpr double microfarad = 1.e-6*farad;
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static constexpr double nanofarad = 1.e-9*farad;
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static constexpr double picofarad = 1.e-12*farad;
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//
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// Magnetic Flux [T][E][Q^-1]
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//
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static constexpr double weber = volt*second;// weber = 1000*megavolt*ns
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//
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// Magnetic Field [T][E][Q^-1][L^-2]
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//
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static constexpr double tesla = volt*second/meter2;// tesla =0.001*megavolt*ns/mm2
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static constexpr double gauss = 1.e-4*tesla;
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static constexpr double kilogauss = 1.e-1*tesla;
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//
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// Inductance [T^2][E][Q^-2]
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//
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static constexpr double henry = weber/ampere;// henry = 1.60217e-7*MeV*(ns/eplus)**2
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//
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// Temperature
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//
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static constexpr double kelvin = 1.;
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//
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// Amount of substance
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//
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static constexpr double mole = 1.;
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//
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// Activity [T^-1]
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//
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static constexpr double becquerel = 1./second ;
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static constexpr double curie = 3.7e+10 * becquerel;
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static constexpr double kilobecquerel = 1.e+3*becquerel;
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static constexpr double megabecquerel = 1.e+6*becquerel;
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static constexpr double gigabecquerel = 1.e+9*becquerel;
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static constexpr double millicurie = 1.e-3*curie;
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static constexpr double microcurie = 1.e-6*curie;
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static constexpr double Bq = becquerel;
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static constexpr double kBq = kilobecquerel;
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static constexpr double MBq = megabecquerel;
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static constexpr double GBq = gigabecquerel;
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static constexpr double Ci = curie;
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static constexpr double mCi = millicurie;
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static constexpr double uCi = microcurie;
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//
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// Absorbed dose [L^2][T^-2]
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//
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static constexpr double gray = joule/kilogram ;
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static constexpr double kilogray = 1.e+3*gray;
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static constexpr double milligray = 1.e-3*gray;
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static constexpr double microgray = 1.e-6*gray;
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//
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// Luminous intensity [I]
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//
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static constexpr double candela = 1.;
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//
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// Luminous flux [I]
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//
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static constexpr double lumen = candela*steradian;
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//
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// Illuminance [I][L^-2]
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//
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static constexpr double lux = lumen/meter2;
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//
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// Miscellaneous
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//
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static constexpr double perCent = 0.01 ;
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static constexpr double perThousand = 0.001;
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static constexpr double perMillion = 0.000001;
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} // namespace CLHEP
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#endif /* HEP_SYSTEM_OF_UNITS_H */
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