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McStas: Sans_spheres

[ Identification | Description | Input parameters | Links ]

The Sans_spheres Component

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

Identification

  • Site:
  • Author: P. Willendrup, K. Lefmann, L. Arleth
  • Origin: Risoe
  • Date: 19.12.2003

Description

Sample for use in a SANS instrument, models hard, mono disperse 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.

Example: Sans_spheres(R = 100, 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.
NameUnitDescriptionDefault
RAARadius of scattering hard spheres100
Phi1Particle volume fraction1e-3
Delta_rhofm/AA^3Excess scattering length density0.6
sigma_absm^-1Absorption cross section density at 2200 m/s0.05
xwidthmhoriz. dimension of sample, as a width0
yheightmvert . dimension of sample, as a height for cylinder/box0
zdepthmdepth of sample0
radiusmOuter radius of sample in (x,z) plane for cylinder/sphere0
target_xm0
target_ymposition of target to focus at0
target_zm6
target_index1Relative index of component to focus at, e.g. next is +10
focus_xwmhoriz. dimension of a rectangular area0
focus_yhmvert. dimension of a rectangular area0
focus_awdeghoriz. angular dimension of a rectangular area0
focus_ahdegvert. angular dimension of a rectangular area0
focus_rmDetector (disk-shaped) radius0
AT ( , , ) RELATIVE
ROTATED ( , , ) RELATIVE

Links


[ Identification | Description | Input parameters | Links ]

Generated on 2023-09-19 20:01:36


Last Modified: Wednesday, 03-Jan-2024 19:59:10 CET
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