The `test_SasView_bcc_paracrystal` Instrument

Site: Templates
Author: Jose Robledo
Origin: FZJ / DTU / ESS DMSC
Date:

Test instrument for the SasView bcc_paracrystal model component as sample description.

Identification

Very simple test instrument for the SasView_bcc_paracrystal component


Example: model_scale=1 Detector: detector_I=83.8252

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
lambda	AA	Mean wavelength of neutrons.	6
dlambda	AA	Wavelength spread of neutrons.	0.05
dnn		([-inf, inf]) Nearest neighbour distance.	220
d_factor		([-inf, inf]) Paracrystal distortion factor.	0.06
radius		([0, inf]) Particle radius.	40
sld		([-inf, inf]) Particle scattering length density.	4
sld_solvent		([-inf, inf]) Solvent scattering length density.	1
theta			60
phi			60
Psi			60
model_scale		Global scale factor for scattering kernel. For systems without inter-particle interference, the form factors can be related to the scattering intensity by the particle volume fraction.	1.0
model_abs		Absorption cross section density at 2200 m/s.	0.0
xwidth	m	([-inf, inf]) Horiz. dimension of sample, as a width.	0.01
yheight	m	([-inf, inf]) vert . dimension of sample, as a height for cylinder/box	0.01
zdepth	m	([-inf, inf]) depth of sample	0.005
R	m	Outer radius of sample in (x,z) plane for cylinder/sphere.	0
target_index		Relative index of component to focus at, e.g. next is +1.	1
target_x	m	relative focus target position.	0
target_y	m	relative focus target position.	0
target_z	m	relative focus target position.	1
focus_xw	m	horiz. dimension of a rectangular area.	0.5
focus_yh	m	, vert. dimension of a rectangular area.	0.5
focus_aw	deg	, horiz. angular dimension of a rectangular area.	0
focus_ah	deg	, vert. angular dimension of a rectangular area.	0
focus_r			0