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McXtrace - An X-ray ray-trace simulation package

ESRF; SAXSLAB Niels Bohr Institute DTU Physics


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McXtrace: Saxs_spheres Component

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

The Saxs_spheres Component

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


  • Author: E. B. Knudsen, P. Willendrup, K. Lefmann, L. Arleth
  • Origin: DTU Fysik
  • Date: 28.10.2010
  • Version: beta


Sample for use in a SAXS instrument, models hard, monodisperse spheres in thin solution.
  The shape of the sample may be a filled box with dimensions 
  xwidth, yheight, zdepth, a cylinder with dimensions radius and yheight,
  a filled sphere with radius R.

Example: Saxs_spheres(R = 20, Phi = 1e-3, Delta_rho = 0.6, sigma_abs = 50, xwidth=0.01, yheight=0.01, zdepth=0.005)

Input parameters

Parameters in boldface are required; the others are optional.
Name Unit Description Default
sphere_mtrl NULL
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
xwidth m horiz. dimension of sample, as a width 0
yheight m vert . dimension of sample, as a height for cylinder/box 0
zdepth m depth of sample 0
radius m Outer radius of sample in (x,z) plane for cylinder/sphere 0
target_x - 0
target_y m position of target to focus at 0
target_z - 6
target_index 1 Relative index of component to focus at, e.g. next is +1 0
focus_xw m horiz. dimension of a rectangular area 0
focus_yh m vert. dimension of a rectangular area 0
focus_aw deg horiz. angular dimension of a rectangular area 0
focus_ah deg vert. angular dimension of a rectangular area 0
focus_r m Detector (disk-shaped) radius 0
mu_c 5 Column of the datafiel which contains absorption coefficients. 0

Output parameters

Name Unit Description Default


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

Generated automatically by McDoc, Peter Willendrup <> / Tue Apr 28 09:59:35 2020

Last Modified: Tuesday, 28-Apr-2020 11:59:35 CEST
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