McXtrace - An X-ray ray-trace simulation package

[ Identification | Description | Input parameters | Links ]

The Filter Component

Block of an attenuating material

Identification

• Site:
• Author: Erik Knudsen
• Origin: DTU Physics
• Date: Jan 24, 2011

Description

A chunk of attenuating material. Attenuation is computed through
the effective length travelled within the material.
No scattering is modelled at present.

Filter shape may be a cylinder, a sphere, a box or any other shape.
box/plate:       xwidth x yheight x zdepth
cylinder:        radius x yheight (along Y axis)
sphere:          radius
any shape:       geometry=OFF/PLY_file

Example: Filter(material_datafile="Ge.txt",
geometry="wire.ply",xwidth=0.02,yheight=0,zdepth=0)

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
refraction	0/1	If nonzero, refraction is enabled.	1
fixed_delta	0/1	Use a fixed delta to compute refraction - useful for debugging.	0
material_datafile	str	File where the material parameters for the filter may be found. Format is similar to what may be found off the NIST website. [Be.txt]	"Be.txt"
geometry	str	File containing the polygon definition of a general shape object. When xwidth is also given, the object is rescaled accordingly (OFF/PLY)	0
xwidth	m	Width of block.	0
yheight	m	Height of block.	0
zdepth	m	Thickness of block.	0
radius	m	Radius of cylinder or sphere.	0

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

Links

• Source code for Filter.comp.
• Meshlab https://www.meshlab.net/
• Geomview and Object File Format (OFF)
• Java version of Geomview (display only) jroff.jar
• qhull
• Powercrust https://www.cs.ucdavis.edu/~amenta/powercrust.html
• material datafile obtained from http://physics.nist.gov/cgi-bin/ffast/ffast.pl

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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