qpms.constants Namespace Reference

Functions
def	nm2eV (lambda_nm, n=1)
def	eV2nm (e_eV, n=1)
def	SU2eV (e_SU)
def	eV2SU (e_eV)
def	SU2nm (e_SU, n=1)
def	nm2SU (lambda_nm, n=1)

Variables
float	epsilon_0 = 8.8541878128e-12
int	c = 299792458.
float	eV = 1.602176487e-19
float	hbar = 1.054571800e-34
float	mu_0 = 1.25663706212e-6
	π = pi
int	μm = 1e-6
int	nm = 1e-9
int	SU = 3e14
int	SCUFF_OMEGAUNIT = SU

Detailed Description

Constants and unit conversion, mostly for standalode usage.

Previously, QPMS used scipy.constants in the python parts.
Now the relevant ones are set explicitly here in order
to avoid dependency on the whole scipy (which needs a fortran
compiler to build.

The values are taken from scipy / "2018 CODATA recommended values".
They slightly differ from the constants in GSL that are used
in the C code. It would be desirable to use the same source,
hence the values here might be subject to change in future versions.

Function Documentation

SU2eV()

def qpms.constants.SU2eV

(

e_SU

)

Scuff frequency units to eV.