McXtrace - An X-ray ray-trace simulation package

[ Identification | Description | Input parameters | Links ]

The Source_flat Component

A flat rectangular or circular surface emitting x-rays

Identification

• Site:
• Author: Erik Knudsen
• Origin: Risoe
• Date: September 25, 2009

Description

A circular or rectangular xray source. Spectrum may be either gaussian or uniform around a central wavelength/energy
or read from a datafile. Xrays are considered emitted uniformly into 4pi, but a square target retricts the beam to
that window and scales the beam intensity accordingly.
If an input spectrum datafile (spectrum_file) is not specified, the beam is restricted to emit photons between E0+-dE keV, or lambda0+-dlambda AA, whichever is given.
The input spectrum file should be formatted such that x-ray energy/wavelength is in the first column and the intensity in the second. Any preceding
lines starting with # are considered part of the file header. If a datafile is given, a nonzero E0 value indicates that is is parametrized by energy (in keV)
as opposed to wavelength (in AA). Wavelength is the default.
Flux is set in the unit photons/s

Example: Source_flat(xwidth=1e-3,yheight=1e-3, focus_xw=0.5e-2, focus_yh=0.45e-2,dist=1, E0=E0, dE=DE)

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
radius	m	Radius of circle in (x,y,0) plane where x-rays are generated.	0
yheight	m	Height of rectangle in (x,y,0) plane where x-rays are generated.	0
xwidth	m	Width of rectangle in (x,y,0) plane where x-rays are generated. Overrides xmin and xmax.	0
xmin	m	Lower bound of x-interval where photons are generated.	0
xmax	m	Upper bound of x-interval where photons are generated.	0
dist	m	Distance to target along z axis.	0
focus_xw	m	Width of target	.045
focus_yh	m	Height of target	.12
E0	keV	Mean energy of xrays.	0
dE	keV	Energy half spread of x-rays (flat or gaussian sigma).	0
lambda0	AA	Mean wavelength of x-rays.	0
dlambda	AA	Wavelength half spread of x-rays.	0
flux	pht/s	Total flux radiated from the source	0
gauss	1	Gaussian (1) or Flat (0) energy/wavelength distribution	0
randomphase		If nonzero, the phase of the emotted photon is random, i.e. source is fully incoherent. otherwise the value of phase is used.	1
phase	rad	Set phase to something given.	0
spectrum_file	string	Filename for optional spectrum-file	""

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

Links

• Source code for Source_flat.comp.

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[ Identification | Description | Input parameters | Links ]

Generated on mcxtrace 3.5.27

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Last Modified: Tuesday, 29-Apr-2025 16:44:04 CEST