Grazing incidence neutron spin echo spectroscopy: instrumentation aspects and scientific opportunities

Grazing Incidence Neutron Spin Echo Spectroscopy (GINSES) opens new possibilities for observing the thermally driven dynamics of macromolecules close to a rigid interface. The information about the dynamics can be retrieved as a function of scattering depth of the evanescent neutron wave, on the len...

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Bibliographic Details
Published in:Journal of physics. Conference series 2014-07, Vol.528 (1), p.12025-6
Main Authors: Holderer, O, Frielinghaus, H, Wellert, S, Lipfert, F, Monkenbusch, M, von Klitzing, R, Richter, D
Format: Article
Language:English
Subjects:
Beams (radiation)
Collimation
Dynamics
Echo surveys
Grazing incidence
Instrumentation
Macromolecules
Microgels
Physics
Scattering
Spectroscopy
Spectrum analysis
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Summary:Grazing Incidence Neutron Spin Echo Spectroscopy (GINSES) opens new possibilities for observing the thermally driven dynamics of macromolecules close to a rigid interface. The information about the dynamics can be retrieved as a function of scattering depth of the evanescent neutron wave, on the length scale in the range of some 10-100 nm. Using a classical neutron spin echo spectrometer with a laterally collimated beam, dynamics can be measured in grazing incidence geometry. We show examples of how the interface modifies the dynamics of microemulsions, membranes and microgels. Instrumental details and possible improvements for this technique will be presented. The key issue is the low intensity for dynamics measurements with an evanescent neutron wave. Conceptual questions how a specialised instrument could improve the experimental technique will be discussed.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/528/1/012025