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

The Monochromator_flat Component

Flat Monochromator crystal with anisotropic mosaic.

Identification

• Author: Kristian Nielsen
• Origin: Risoe
• Date: 1999
• Version: 1.6

Description

Flat, infinitely thin mosaic crystal, useful as a monochromator or analyzer.
For an unrotated monochromator component, the crystal surface lies in the Y-Z
plane (ie. parallel to the beam).
The mosaic is anisotropic gaussian, with different FWHMs in the Y and Z
directions. The scattering vector is perpendicular to the surface.

Example: Monochromator_flat(zmin=-0.1, zmax=0.1, ymin=-0.1, ymax=0.1,
          mosaich=30.0, mosaicv=30.0, r0=0.7, Q=1.8734)

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
zmin	m	Lower z-bound of crystal	0
zmax	m	Upper z-bound of crystal	0
ymin	m	Lower y-bound of crystal	0
ymax	m	Upper y-bound of crystal	0
width			0
height			0
mosaich	arc minutes	Horisontal mosaic (in Z direction) (FWHM)	30.0
mosaicv	arc minutes	Vertical mosaic (in Y direction) (FWHM)	30.0
r0	1	Maximum reflectivity	0.7
Q	AA-1	Magnitude of scattering vector	1.8734
DM	Angstrom	monochromator d-spacing instead of Q = 2*pi/DM	0

Output parameters

Name	Unit	Description	Default
mos_rms_y
mos_rms_z
mos_rms_max
mono_Q

Links

• Source code for Monochromator_flat.comp.

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

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Fri May 11 08:41:08 2012

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Last Modified: Friday, 11-May-2012 10:41:08 CEST