[ Identification | Description | Input parameters | Links ]

The McStas_Single_crystal Instrument

Wrapper for use of Single_crystal in SIMRES

Identification

• Site: SINE2020
• Author: Erik B Knudsen erkn@fysik.dtu.dk
• Origin: DTU Physics
• Date: Dec. 2018

Description

This instrument provides an MCPL-based interface for the use of Single_crystal in the SIMRES package.
The instrument has been developed in the context of WP8 in the SINE2020 project  and is part of
deliverable D8.8.

(EU Horizon 2020 research and innovation programme under grant agreement No 654000).

The default material is Al as a cylinder of radius 0.01 m x height 0.02 m

Example: McStas_Single_crystal reflections=Al.lau radius=0.01 yheight=0.02

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
reflections	string	Input file for reflections, laz and lau formats from McStas accepted	"Al.lau"
geometry	string	Name of an Object File Format (OFF) or PLY file for complex geometry.	""
radius	m	Sample radius	1e-2
xwidth	m	Sample width along x	0
yheight	m	Sample height along y	2e-2
zdepth	m	Sample depth along z	0
delta_d_d	1	Lattice spacing variance, gaussian RMS	1e-3
mosaic	arc minutes	Crystal mosaic (isotropic), gaussian RMS. Puts the crystal in the isotropic mosaic model state, thus disregarding other mosaicity parameters.	1
mosaic_a	arc minutes	Horizontal (rotation around lattice vector a) mosaic (anisotropic), gaussian RMS. Put the crystal in the anisotropic crystal vector state. I.e. model mosaicity through rotation around the crystal lattice vectors. Has precedence over in-plane mosaic model.	0
mosaic_b	arc minutes	Vertical (rotation around lattice vector b) mosaic (anisotropic), gaussian RMS.	0
mosaic_c	arc minutes	Out-of-plane (Rotation around lattice vector c) mosaic (anisotropic), gaussian RMS	0
barns	1	Flag to indicate if |F 2| from "reflections" is in barns or fm2 (barns = 1 for laz, barns = 0 for lau type files).	0
order	1	Limit multiple scattering up to given order (0: all, 1: first, 2: second, ...)	0
rot_x	deg	Sample rotation around x	0
rot_y	deg	Sample rotation around y	0
rot_z	deg	Sample rotation around z	0

Links

• Source code for McStas_Single_crystal.instr.
• Website for the MCPL particle exchange format
• Website for the SIMRES package
• Website for WP8 in EU-SINE2020

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[ Identification | Description | Input parameters | Links ]

Generated on 2022-12-12 13:20:16

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Last Modified: Wednesday, 09-Aug-2023 17:01:02 CEST