Optical design of the SNS liquids reflectometer

Ankner, John F.; Rehm, Christine; Blakeman, E.D.; Kellogg, Roger L.

doi:10.1117/12.451684

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2023

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“…It is mainly used for specular reflectometry, which characterizes structure normal to the surface, i.e., layers. Its main advantage over similar instruments at other facilities is the available high flux [2]. Because it has only recently been commissioned, it is still undergoing improvement.…”

Section: Introductionmentioning

confidence: 97%

First Measurements of the Inclined Boron Layer Thermal-Neutron Detector for Reflectometry

Vuure

Ankner

Browning

et al. 2010

IEEE Trans. Nucl. Sci.

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Section: Introductionmentioning

confidence: 97%

First Measurements of the Inclined Boron Layer Thermal-Neutron Detector for Reflectometry

Vuure

Ankner

Browning

et al. 2010

IEEE Trans. Nucl. Sci.

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Cinematic reflectometry using QIKR, the quite intense kinetics reflectometer

Ankner

Ashkar

Browning

et al. 2023

Review of Scientific Instruments

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The Quite Intense Kinetics Reflectometer (QIKR) will be a general-purpose, horizontal-sample-surface neutron reflectometer. Reflectometers measure the proportion of an incident probe beam reflected from a surface as a function of wavevector (momentum) transfer to infer the distribution and composition of matter near an interface. The unique scattering properties of neutrons make this technique especially useful in the study of soft matter, biomaterials, and materials used in energy storage. Exploiting the increased brilliance of the Spallation Neutron Source Second Target Station, QIKR will collect specular and off-specular reflectivity data faster than the best existing such machines. It will often be possible to collect complete specular reflectivity curves using a single instrument setting, enabling “cinematic” operation, wherein the user turns on the instrument and “films” the sample. Samples in time-dependent environments (e.g., temperature, electrochemical, or undergoing chemical alteration) will be observed in real time, in favorable cases with frame rates as fast as 1 Hz. Cinematic data acquisition promises to make time-dependent measurements routine, with time resolution specified during post-experiment data analysis. This capability will be deployed to observe such processes as in situ polymer diffusion, battery electrode charge–discharge cycles, hysteresis loops, and membrane protein insertion into lipid layers.

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Optical design of the SNS liquids reflectometer

Cited by 2 publications

References 3 publications

First Measurements of the Inclined Boron Layer Thermal-Neutron Detector for Reflectometry

First Measurements of the Inclined Boron Layer Thermal-Neutron Detector for Reflectometry

Cinematic reflectometry using QIKR, the quite intense kinetics reflectometer

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