[ Identification | Description | Input parameters | Links ]

# The `SANSsimpleSpheres` Instrument

Instrument short description

## Identification

- Site: e
- Author: Linda Udby (udby@nbi.dk)
- Origin: Niels Bohr Institute
- Date: 20.09.2016

## Description

    Instrument longer description (type, elements, usage...)
    This simple SANS instrument is used for the SANS simulation quiz on th e-learning platform www.e-neutrons.org

    Example: mcrun SANSsimple.instr  Lambda=10 DLambda=0

## Input parameters

Parameters in boldface are required; the others are optional.

Name | Unit | Description | Default
pinhole_rad | m | radius of the collimating pinholes. Also used to optimise the sample size. | 0.004
LC | m | length of the collimator - distance between pinholes | 3
LD | m | distance between the last pinhole slit and detector | 3
Lambda | Angs | Average wavelength traced from source | 6
DLambda | Angs | Wavelength band +/- traced from source | 0.001
R | m | average radius of the monodisperse spheres in the sample | 400
dR | AA | Normal variance of the radius of spheres in the sample. If zero the sample is monodisperse. | 0
PHI | 1 | Volumefraction of the hard spheres in the sample | 1e-2
Delta_Rho | fm/Angs^3 | Volume specific scattering length density contrast of the hard, monodisperse spheres in the sample as compared to the solution | 0.6
BEAMSTOP | 0/1 | If set, the beamstop is inserted in front of the detector in order to block the transmitted beam | 1
SAMPLE | 0/1 | If set, a sample of spheres or spherical shells is inserted | 1

## Links

- Source code for `SANSsimpleSpheres.instr`.
- https://sim.e-neutrons.org/instrument/intro-ns/SANSsimple

[ Identification | Description | Input parameters | Links ]