Reflectometry

Overview

The Reflectometry Group focuses on probing thin structures through the use of neutrons’ refractive properties and can help identify the composition of the sample. There are two types of reflectometry instruments housed at ORNL, magnetic and liquid reflectometers.

Data Reduction Process

The data reduction is automatically reduced by an instrument specific script or by using an instrument specific software.

Data Reduction Software

Each of these instruments have their own reduction software. For MAGREF, the software is QuickNXS and for LIQREF, the software is RefRed.

Reflectometry Data Reduction Software Links

Software	Description	Documentation	User Guide	Source Code	Coding Language/ Technologies
MagnetismReflectometer	Auto reduction Script For the Magnetic Reflectometer	Read the docs	–	GitHub	Python
QuickNXS	Software For the Magnetic Reflectometer	–	Manual	GitHub	Python
LiquidsReflectometer	Auto reduction Script For the Liquid Reflectometer	–	–	GitHub	Python
RefRed	“Data Reduction Software for the Liquids Reflectometer at the Spallation Neutron Source at Oak Ridge National Laboratory” (RefRed Contributors).	–	–	GitHub	Python

Data Analysis Software

Reflectometry Data Analysis Software Links

Software	Description	Documentation	User Guide	Source Code	Paper	Coding Language/ Technologies
Refl1D	“Refl1D is a program for analyzing 1D reflectometry measurements made with X-ray and neutron beamlines. The 1-D models give the depth profile for material scattering density composed of a mixture of flat and continuously varying freeform layers. With polarized neutron measurements, scientists can study the sub-surface structure of magnetic samples. The architecture supports the addition of specialized layer types such as models for the density distribution of polymer brushes, and volume space modeling for proteins in bio-membranes” (Refl1D Contributors).	Read the docs	Tutorial	GitHub	–	Python
Refnx	“refnx is a flexible, powerful, Python package for generalised curvefitting analysis, specifically neutron and X-ray reflectometry data” (Refnx Contributors).	Read the docs	Getting Started	GitHub	–	Python
Genx	“GenX is a versatile program using the differential evolution algorithm for fitting, primarily, X-ray and neutron reflectivity data, lately also surface x-ray diffraction data” (GenX Contributors).	GitHub Page	How to use	GitHub	Paper	Python