McXtrace - An X-ray ray-trace simulation package

[ Identification | Description | Input parameters | Links ]

The Grating_trans Component

Transmission grating

Identification

• Site:
• Author: Erik B Knudsen (erkn@fysik.dtu.dk)
• Origin: DTU Physics
• Date: December 2016

Description

Model of a 1D rectangular transmission grating based on the theory developed in Schnopper et. al., Applied Optics, 1977.
The grating lines are assumed to be vertical. Within each period a fraction gamma is the "open" fraction.
(I.e. 1 is completely open). At present only absorption in the substrate (modelled by the thickness sdepth)
is included.

This  component is currently undergoing validation.

Example: Grating_trans(
xwidth=25e-3, yheight=25e-3, gamma=0.4, period=2000e-10, zdepth=5100e-10, max_order=3, material="Au.txt")

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
xwidth	m	Width of the grating. Defines how many lines there are in total.	1e-3
yheight	m	Height of the grating.	1e-3
period	m	Distance between grating grooves.	1e-6
gamma	0-1	Ratio between groove and period aka duty cycle. 1 means fully open.	0.5
zdepth	m	Depth of grooves.	1e-6
sdepth	m	Thickness of substrate. The default is to have no substrate - i.e. rods.	0
material	str	Data file containing the material from which the grating is made.	"Au.txt"
substrate	str	Data file containing material data for the substrate.	""
max_order	1	Maximum order to diffract	2
fixed_delta	0/1	Set delta to the given constant. Useful for debugging.	0

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

Links

• Source code for Grating_trans.comp.

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[ Identification | Description | Input parameters | Links ]

Generated on mcxtrace 3.5.32

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Last Modified: Tuesday, 17-Jun-2025 20:12:04 CEST