Misc

starter.param

random.param

Configure the pseudorandom number generator (PRNG).

Allows to select method and global seeds in order to vary the initial state of the parallel PRNG.

namespace picongpu
namespace random

Typedefs

using Generator = pmacc::random::methods::XorMin<>

Random number generation methods.

It is not allowed to change the method and restart an already existing checkpoint.

  • pmacc::random::methods::XorMin

  • pmacc::random::methods::MRG32k3aMin

  • pmacc::random::methods::AlpakaRand

using SeedGenerator = seed::Value<42>

random number start seed

Generator to create a seed for the random number generator. Depending of the generator the seed is reproducible or or changed with each program execution.

  • seed::Value< 42 >

  • seed::FromTime

  • seed::FromEnvironment

physicalConstants.param

namespace picongpu

Variables

constexpr float_64 PI = 3.141592653589793238462643383279502884197169399
constexpr float_64 UNIT_SPEED = SI::SPEED_OF_LIGHT_SI

Unit of speed.

constexpr float_X SPEED_OF_LIGHT = float_X(SI::SPEED_OF_LIGHT_SI / UNIT_SPEED)
constexpr float_64 UNITCONV_keV_to_Joule = 1.60217646e-16
constexpr float_64 UNITCONV_Joule_to_keV = (1.0 / UNITCONV_keV_to_Joule)
constexpr float_64 UNITCONV_AU_to_eV = 27.21139
constexpr float_64 UNITCONV_eV_to_AU = (1.0 / UNITCONV_AU_to_eV)
namespace SI

Variables

constexpr float_64 SPEED_OF_LIGHT_SI = 2.99792458e8

unit: m / s

constexpr float_64 MUE0_SI = PI * 4.e-7

unit: N / A^2

constexpr float_64 EPS0_SI = 1.0 / MUE0_SI / SPEED_OF_LIGHT_SI / SPEED_OF_LIGHT_SI

unit: C / (V m)

constexpr float_64 Z0_SI = MUE0_SI * SPEED_OF_LIGHT_SI

impedance of free space unit: ohm

constexpr float_64 HBAR_SI = 1.054571800e-34

reduced Planck constant unit: J * s

constexpr float_64 ELECTRON_MASS_SI = 9.109382e-31

unit: kg

constexpr float_64 ELECTRON_CHARGE_SI = -1.602176e-19

unit: C

constexpr float_64 ATOMIC_UNIT_ENERGY = 4.36e-18
constexpr float_64 ATOMIC_UNIT_EFIELD = 5.14e11
constexpr float_64 ATOMIC_UNIT_TIME = 2.4189e-17
constexpr float_64 N_AVOGADRO = 6.02214076e23

Avogadro number unit: mol^-1.

Y. Azuma et al. Improved measurement results for the Avogadro constant using a 28-Si-enriched crystal, Metrologie 52, 2015, 360-375 doi:10.1088/0026-1394/52/2/360