Sub-millisecond time-resolved small-angle neutron scattering measurements at NIST
Charles Glinka1,2, Markus Bleuel1, Peter Tsai1
1Center for Neutron Research, National Institute of Standards and Technology, 100 Bureau Drive/MS 6103, Gaithersburg, Maryland 20899, USA.
Journal of Applied Crystallography
|July 21, 2020
Summary
New instrumentation enables time-resolved small-angle neutron scattering (TR-SANS) with sub-millisecond resolution. This technique reveals the reorientation dynamics of magnetic particles, advancing materials science research.
Area of Science:
- Materials Science
- Neutron Scattering Physics
- Physical Chemistry
Background:
- Time-resolved small-angle neutron scattering (TR-SANS) is crucial for studying dynamic processes in materials.
- Existing TR-SANS techniques have limitations in time resolution.
- Gähler's TISANE (time-involved small-angle neutron experiments) concept offers a promising approach for higher time resolution.
Purpose of the Study:
- To implement and operate a novel TR-SANS instrument at NIST.
- To achieve sub-millisecond time resolution for dynamic material studies.
- To demonstrate the instrument's capability in analyzing particle reorientation.
Main Methods:
- Utilized Gähler's TISANE concept for TR-SANS.
- Developed novel electronics for synchronizing high-speed choppers and sample stimuli.
- Operated the instrument at NIST's Center for Neutron Research.
Main Results:
- Successfully implemented TR-SANS instrumentation with sub-millisecond time resolution.
- Demonstrated the technique's effectiveness in capturing rapid material dynamics.
- Elucidated the reorientation dynamics of isometric magnetic particles.
Conclusions:
- The developed TR-SANS instrument provides unprecedented time resolution for dynamic studies.
- This advancement facilitates detailed investigation of fast processes in magnetic materials.
- The technique is valuable for understanding particle reorientation and other time-dependent phenomena.
