[ Identification | Description | Input parameters | Links ]

The Test_Monochromators Instrument

Compares intensities of Monochromator components.

Identification

• Site: Tests_optics
• Author: Peter Christiansen
• Origin: RISOE.
• Date: July 2006.

Description

Very simple setup to compare intensities diffracted by Monochromators.
It shows that implementations are equivalent.

PG 002 oriented examples:

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
Mono	1	Choice of Monochromator component to use, with 1=Monochromator_flat 2=Monochromator_pol 3=Monochromator_pol (forcing 1% events to be reflected) 4=Monochromator_curved (in flat mode) 5=Monochromator_2foc (contrib, flat mode) 6=Single_crystal 7=NCrystal	1
lmin	Angs	Minimum wavelength produced from source	1.6
lmax	Angs	Maximum wavelength produced from source	2.4
Moz	arcmin	Mosaicity	40
reflections	str	input-file for Single_crystal (Mono=6)	"C_graphite.lau"
NXrefs	str	input-file for NCrystal (Mono=7)	"C_sg194_pyrolytic_graphite.ncmat"
DM	Angs	Mono lattice spacing (should be chosen compatible with file-unput when Mono=6/7	3.3539
PG	1	PG-mode for Single_crystal (range 0-1)	0
powder	1	Powder-mode for Single_crystal	0
order	1	Maximum order of scattering in Single_crystal	0
ax	Angs or 1/Angs	x-coordinate of 1st direct/recip lattice unit cell vector (depends on recip setting)	0
ay	Angs or 1/Angs	y-coordinate of 1st direct/recip lattice unit cell vector (depends on recip setting)	0
az	Angs or 1/Angs	z-coordinate of 1st direct/recip lattice unit cell vector (depends on recip setting)	0
bx	Angs or 1/Angs	x-coordinate of 2nd direct/recip lattice unit cell vector (depends on recip setting)	0
by	Angs or 1/Angs	y-coordinate of 2nd direct/recip lattice unit cell vector (depends on recip setting)	0
bz	Angs or 1/Angs	z-coordinate of 2nd direct/recip lattice unit cell vector (depends on recip setting)	0
cx	Angs or 1/Angs	x-coordinate of 3rd direct/recip lattice unit cell vector (depends on recip setting)	0
cy	Angs or 1/Angs	y-coordinate of 3rd direct/recip lattice unit cell vector (depends on recip setting)	0
cz	Angs or 1/Angs	x-coordinate of 3rd direct/recip lattice unit cell vector (depends on recip setting)	0
recip	1	Flag to indicate if ax/y/z, bx/y/z, cx/y/z lattice corrdinates are in direct (=0) or reciprocal space units	0
dthick	m	Thickness of mono slab in Mono=6/7 cases	0.0015
p_transmit	1	Probability of transmission in Single_crystal Mono=6 case	0.001
lambda	Angs	Target mochromator wavelength	2.0

Links

• Source code for Test_Monochromators.instr.

---

[ Identification | Description | Input parameters | Links ]

Generated on 2023-09-19 20:01:36

---

Last Modified: Tuesday, 17-Sep-2024 05:31:13 CEST