McXtrace - An X-ray ray-trace simulation package

[ Identification | Description | Input parameters | Links ]

The Lens_simple Component

Simple refractive x-ray lens

Identification

• Author: Erik Knudsen
• Origin: Risoe
• Date: June 16, 2009

Description

Models a stack of N refractive lenses, with a radius of curvature, r, at the apex.
The model is a thin-lens approximation where photons are refracted in a the XY plane
at Z=0. Absorption is generally disregarded may be handled through the use of the optional
transmission parameter T, where 0<=T<=1.
Thus, the lens has the focal length of f=R/(2*N*&delta) where the x-ray refractive
index is written: n = 1 - &delta + i &beta.

Example: Lens_simple(xwidth=1e-5, yheight=1e-5, material_datafile="Be.txt",N=100,r=0.3e-3)

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
xwidth	m	Width of lens aperture.	0
yheight	m	Height of lens aperture.	0
radius	m	Radius of lens aperture (overrides xwidth & yheight).	1e-3
T	0-1	Transmission efficiency of the lens.	1
r	m	The radius of curvature of the lens. Optional parameters:	3e-4
N	1	The number of successive lenses in the stack.	1
verbose	0/1	Extra information for debugging.	0
f	m	Focal length - overrides the material_datafile - and diregards chromatic aberration.	0
material_datafile		File where the material parameters for the lens may be found. Format is similar to what may be found off the NIST website.	"Be.txt"

AT (	,	,		) RELATIVE		Generate to clipboard
ROTATED (	,	,		) RELATIVE

Links

• Source code for Lens_simple.comp.
• material datafile obtained from http://physics.nist.gov/cgi-bin/ffast/ffast.pl

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[ Identification | Description | Examples | Input parameters | Links ]

Generated on mcxtrace 3.10.2

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Last Modified: Monday, 02-Nov-2026 22:21:08 CET