[ Identification | Description | Input parameters | Links ]

The Powder_validation Instrument

Identification

• Site: Union_validation
• Author: Mads Bertelsen
• Origin: Johns Hopkins University, Baltimore
• Date: May 2016

Description

Validation of Union powder against standard PowderN component.

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
comp_select	1	1=Union components, 2=PowderN	1
material_data_file	string	Powder sample definition	"Al.laz"
E0	meV	Source mean energy	100
dE	meV	Source energy spread	2
sample_radius	m	Sample radius	0.01
sample_height	m	Sample height	0.01
pack		Sample packing factor	1
sigma_inc	barns	Sample incoherent cross-section	0.0328
sigma_abs	barns	Sample absorption cross-section	0.924
Vc	AA	Sample unit cell volume	66.4
geometry_interact		p_interact for the sample	0.5
incoherent_fraction		Fraction of statistics assigned for incoherent scattering	0.2
div	deg	Source divergence (angular w and h)	1.5
d_phi	deg	Restriction of Debye-Scherrer cones around scattering plane 0=full illumination	30

Links

• Source code for Powder_validation.instr.

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[ Identification | Description | Input parameters | Links ]

Generated for mcstas 3.5.24

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Last Modified: Monday, 07-Apr-2025 07:02:08 CEST