WarpX
Variables
ablastr::constant::SI Namespace Reference

Variables

static constexpr auto c = 299'792'458._rt
 vacuum speed of light [m/s] More...
 
static constexpr auto ep0 = 8.8541878128e-12_rt
 vacuum permittivity: dielectric permittivity of vacuum [F/m] More...
 
static constexpr auto mu0 = 1.25663706212e-06_rt
 vacuum permeability: magnetic permeability of vacuum = 4.0e-7 * pi [H/m] More...
 
static constexpr auto q_e = 1.602176634e-19_rt
 elementary charge [C] More...
 
static constexpr auto m_e = 9.1093837015e-31_rt
 electron mass [kg] More...
 
static constexpr auto m_p = 1.67262192369e-27_rt
 proton mass [kg] More...
 
static constexpr auto m_u = 1.66053906660e-27_rt
 dalton: unified atomic mass unit [kg] More...
 
static constexpr auto hbar = 1.054571817e-34_rt
 reduced Planck Constant = h / tau [J*s] More...
 
static constexpr auto alpha = 0.007297352573748943_rt
 fine-structure constant = mu0/(4*pi)*q_e*q_e*c/hbar [dimensionless] More...
 
static constexpr auto r_e = 2.817940326204929e-15_rt
 classical electron radius = 1./(4*pi*ep0) * q_e*q_e/(m_e*c*c) [m] More...
 
static constexpr double xi = 1.3050122447005176e-52
 xi: nonlinearity parameter of Heisenberg-Euler effective theory = (2.*alpha*alpha*ep0*ep0*hbar*hbar*hbar)/(45.*m_e*m_e*m_e*m_e*c*c*c*c*c) More...
 
static constexpr auto xi_c2 = 1.1728865132395492e-35_rt
 xi times c2 = xi*c*c. This should be usable for single precision instead of xi; very close to smallest float32 number possible (1.2e-38) More...
 
static constexpr auto kb = 1.380649e-23_rt
 Boltzmann constant (exact) [J/K]. More...
 
static constexpr auto eV = q_e
 1 eV in [J] More...
 
static constexpr auto MeV = q_e * 1e6_rt
 1 MeV in [J] More...
 
static constexpr auto eV_invc = eV / c
 1 eV/c in [kg*m/s] More...
 
static constexpr auto MeV_invc = MeV / c
 1 MeV/c in [kg*m/s] More...
 
static constexpr auto eV_invc2 = eV / (c * c)
 1 eV/c^2 in [kg] More...
 
static constexpr auto MeV_invc2 = MeV / (c * c)
 1 MeV/c^2 in [kg] More...
 

Detailed Description

Physical constants

Values are the 2018 CODATA recommended values https://physics.nist.gov/cuu/Constants/index.html

New additions here should also be considered for addition to warpx_constants in WarpXUtil.cpp's makeParser, so that they're available in parsing and evaluation of PICMI expressions, as well as the corresponding Python definitions

Variable Documentation

◆ alpha

constexpr auto ablastr::constant::SI::alpha = 0.007297352573748943_rt
staticconstexpr

fine-structure constant = mu0/(4*pi)*q_e*q_e*c/hbar [dimensionless]

◆ c

constexpr auto ablastr::constant::SI::c = 299'792'458._rt
staticconstexpr

vacuum speed of light [m/s]

◆ ep0

constexpr auto ablastr::constant::SI::ep0 = 8.8541878128e-12_rt
staticconstexpr

vacuum permittivity: dielectric permittivity of vacuum [F/m]

◆ eV

constexpr auto ablastr::constant::SI::eV = q_e
staticconstexpr

1 eV in [J]

◆ eV_invc

constexpr auto ablastr::constant::SI::eV_invc = eV / c
staticconstexpr

1 eV/c in [kg*m/s]

◆ eV_invc2

constexpr auto ablastr::constant::SI::eV_invc2 = eV / (c * c)
staticconstexpr

1 eV/c^2 in [kg]

◆ hbar

constexpr auto ablastr::constant::SI::hbar = 1.054571817e-34_rt
staticconstexpr

reduced Planck Constant = h / tau [J*s]

◆ kb

constexpr auto ablastr::constant::SI::kb = 1.380649e-23_rt
staticconstexpr

Boltzmann constant (exact) [J/K].

◆ m_e

constexpr auto ablastr::constant::SI::m_e = 9.1093837015e-31_rt
staticconstexpr

electron mass [kg]

◆ m_p

constexpr auto ablastr::constant::SI::m_p = 1.67262192369e-27_rt
staticconstexpr

proton mass [kg]

◆ m_u

constexpr auto ablastr::constant::SI::m_u = 1.66053906660e-27_rt
staticconstexpr

dalton: unified atomic mass unit [kg]

◆ MeV

constexpr auto ablastr::constant::SI::MeV = q_e * 1e6_rt
staticconstexpr

1 MeV in [J]

◆ MeV_invc

constexpr auto ablastr::constant::SI::MeV_invc = MeV / c
staticconstexpr

1 MeV/c in [kg*m/s]

◆ MeV_invc2

constexpr auto ablastr::constant::SI::MeV_invc2 = MeV / (c * c)
staticconstexpr

1 MeV/c^2 in [kg]

◆ mu0

constexpr auto ablastr::constant::SI::mu0 = 1.25663706212e-06_rt
staticconstexpr

vacuum permeability: magnetic permeability of vacuum = 4.0e-7 * pi [H/m]

◆ q_e

constexpr auto ablastr::constant::SI::q_e = 1.602176634e-19_rt
staticconstexpr

elementary charge [C]

◆ r_e

constexpr auto ablastr::constant::SI::r_e = 2.817940326204929e-15_rt
staticconstexpr

classical electron radius = 1./(4*pi*ep0) * q_e*q_e/(m_e*c*c) [m]

◆ xi

constexpr double ablastr::constant::SI::xi = 1.3050122447005176e-52
staticconstexpr

xi: nonlinearity parameter of Heisenberg-Euler effective theory = (2.*alpha*alpha*ep0*ep0*hbar*hbar*hbar)/(45.*m_e*m_e*m_e*m_e*c*c*c*c*c)

◆ xi_c2

constexpr auto ablastr::constant::SI::xi_c2 = 1.1728865132395492e-35_rt
staticconstexpr

xi times c2 = xi*c*c. This should be usable for single precision instead of xi; very close to smallest float32 number possible (1.2e-38)