The `Source_div` Component

X-ray source with Gaussian or uniform divergence

Identification

Site:
Author: Erik Knudsen
Origin: Risoe
Date: November 11, 2009

Description

A flat rectangular surface source with uniform or Gaussian divergence profile and focussing.
If the parametere gauss is not set (the default) the divergence profile is flat
in the range [-focus_ax,focus_ay]. If gauss is set, the focux_ax,focus_ay is considered
the standard deviation of the gaussian profile.
Currently focussing is only active for flat profile. The "focus window" is defined by focus_xw,focus_yh and dist.
The spectral intensity profile is uniformly distributed in the energy interval defined by e0+-dE/2 or
by wavelength lambda0+-dlambda/2

Example: Source_div(xwidth=0.1, yheight=0.1, focus_aw=2, focus_ah=2, E0=14, dE=2, gauss=0)

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
spectrum_file		File from which to read the spectral intensity profile	NULL
xwidth	m	Width of source.	0
yheight	m	Height of source.	0
focus_aw	rd	Standard deviation (Gaussian) or maximal (uniform) horz. width divergence.	0
focus_ah	rd	Standard deviation (Gaussian) or maximal (uniform) vert. height divergence.	0
focus_ar	rd	Standard deviation (Gaussian) or maximal (uniform) radial divergence.	0
radius	m	Radius of circular source	0
E0	keV	Mean energy of X-rays.	0
dE	keV	Energy half spread of X-rays. If gauss==0 dE is the half-spread, i.e. E\in[E0-dE,E0+dE], if gauss!=0 it's interpreted as the standard dev.	0
lambda0	AA	Mean wavelength of X-rays (only relevant for E0=0).	0
dlambda	AA	Wavelength half spread of X-rays.	0
flux	1/(s * mm*2 mrad*2 energy unit)	flux per energy unit, Angs or keV.	0
gauss	1	Criterion: 0: uniform, 1: Gaussian distribution of energy/wavelength.	0
gauss_a	1	Criterion: 0: uniform, 1: Gaussian divergence distribution.	0
randomphase	1	If !=0 the photon phase is chosen randomly.	1
phase	1	Value of the photon phase (if randomphase==0).	0

AT (	,	,		) RELATIVE
ROTATED (	,	,		) RELATIVE

McXtrace - An X-ray ray-trace simulation package

The Source_div Component

Identification

Description

Input parameters

Links

The `Source_div` Component