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Cinematic reflectometry using QIKR, the quite intense kinetics reflectometer
J F Ankner1, R Ashkar2, J F Browning3
1Second Target Station Project, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA.
The Review of Scientific Instruments
|February 1, 2023
Summary
The new Quite Intense Kinetics Reflectometer (QIKR) enables real-time neutron reflectivity measurements for dynamic materials science. This advanced technique allows for rapid, in-situ observation of processes like polymer diffusion and battery cycling.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Surface Science
Background:
- Neutron reflectometry is crucial for analyzing interfaces in soft matter, biomaterials, and energy storage.
- Existing reflectometers have limitations in data acquisition speed for dynamic processes.
- The Spallation Neutron Source Second Target Station offers enhanced neutron brilliance.
Purpose of the Study:
- Introduce the Quite Intense Kinetics Reflectometer (QIKR), a novel neutron reflectometer.
- Enable high-speed, real-time observation of time-dependent interfacial phenomena.
- Facilitate routine time-resolved measurements for various material systems.
Main Methods:
- Utilizing neutron reflectometry with a horizontal sample surface geometry.
- Employing the high brilliance of the Spallation Neutron Source Second Target Station.
- Implementing "cinematic" data acquisition for rapid, continuous measurements.
Main Results:
- QIKR will collect specular and off-specular reflectivity data significantly faster than current instruments.
- Complete specular reflectivity curves can often be obtained in a single instrument setting.
- Real-time observation of dynamic processes with frame rates up to 1 Hz is achievable.
Conclusions:
- QIKR's cinematic operation will revolutionize time-dependent neutron reflectivity studies.
- The instrument will enable routine in-situ observation of polymer diffusion, battery cycling, and membrane dynamics.
- This advancement will accelerate research in soft matter, biomaterials, and energy storage.
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