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Updated: Feb 9, 2026
07:53
Measuring the Time-Evolution of Nanoscale Materials with Stopped-Flow and Small-Angle Neutron Scattering
Published on: August 6, 2021
2.7K
Flow-through compression cell for small-angle and ultra-small-angle neutron scattering measurements
Rex P Hjelm1, Mark A Taylor2, Luke P Frash3
1Materials Science in Radiation and Dynamics Extremes, Materials Science and Technology Division and the Los Alamos Neutron Science Center, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
The Review of Scientific Instruments
|June 6, 2018
Summary
This study introduces a new compression cell for neutron scattering, enabling in situ measurements of geological materials under stress. This research enhances understanding of subsurface fluid flow and material properties under pressure.
Area of Science:
- Materials Science
- Geophysics
- Neutron Scattering
Background:
- In situ measurements of geological materials under compression and hydrostatic pressure are crucial for understanding field behavior and subsurface processes.
- Nano- to micro-scale porosity significantly impacts subsurface liquid and gas flow, affecting energy resource extraction and material properties.
- Small-angle neutron scattering (SANS) is an effective technique for characterizing porous structures at nano to micro length scales.
Purpose of the Study:
- To design, realize, and demonstrate the performance of a novel neutron scattering sample environment.
- To enable in situ measurements of materials under combined compressive stress and hydrostatic fluid pressure.
- To probe the effects of stress vectors parallel to the neutron beam on material structure.
Main Methods:
- Development of a specialized compression cell for neutron scattering experiments.
- Application of small-angle neutron scattering (SANS) and ultra SANS.
- In situ measurements under effective stress up to 60 MPa.
Main Results:
- The novel compression cell successfully provides compressive stress and hydrostatic pressures.
- The system demonstrates stability under the tested stress and pressure conditions.
- The neutron optics are suitable for probing stress-induced changes in porous materials.
Conclusions:
- The developed compression cell is a valuable tool for in situ neutron scattering studies of materials under stress.
- This technology facilitates a deeper understanding of porous materials relevant to energy resources and material manufacturing.
- The system's stability and suitability for experimental objectives are confirmed.
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