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

The Sans_spheres Component

Sample for Small Angle Neutron Scattering - hard spheres in thin solution, mono disperse.

Identification

• Author: P. Willendrup, K. Lefmann, L. Arleth
• Origin: Risoe
• Date: 19.12.2003
• Version: 1.13
• Modification history:
  • KL, 7 June 2005

Description

Sample for use in a SANS instrument, models hard, mono disperse spheres in thin solution.
The shape of the sample may be a cylinder of given radius or a box with dimensions
xwidth, yheight, zthick. qmax defines a cutoff in q.

Example: Sans_spheres(R = 100, Phi = 1e-3, Delta_rho = 0.6, sigma_a = 50, qmax = 0.3 ,xwidth=0.01, yheight=0.01, zthick=0.005)

%BUGS
This component does NOT simulate absolute intensities. This latter depends on the detector parameters.

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
R	AA	Radius of scattering hard spheres	100
Phi	1	Particle volume fraction	1e-3
Delta_rho	fm/AA^3	Excess scattering length density	0.6
sigma_a	m^-1	Absorption cross section density at 2200 m/s	0.50
dist	m	Distance from sample to detector	6
Rdet	m	Detector (disk-shaped) radius	0.5
xwidth	m	horiz. dimension of sample, as a width	0.01
yheight	m	vert . dimension of sample, as a height	0.01
zthick	m	thickness of sample	0.005
qmax	AA^-1	Maximum momentum transfer	0

Output parameters

Name	Unit	Description	Default
my_s_v2
my_a_v

Links

• Source code for Sans_spheres.comp.
• The test/example instrument SANS.instr.
• Some alternative implementations exist as contributed components.

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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