Print Email Facebook Twitter Wavelength-independent constant period spin-echo modulated small angle neutron scattering Title Wavelength-independent constant period spin-echo modulated small angle neutron scattering Author Sales, Morten (University of Copenhagen) Plomp, J. (TU Delft RID/TS/Technici Pool) Habicht, Klaus (Helmholtz-Zentrum Berlin) Tremsin, Anton (University of California) Bouwman, W.G. (TU Delft RST/Neutron and Positron Methods in Materials) Strobl, Markus (University of Copenhagen; European Spallation Source) Date 2016 Abstract Spin-Echo Modulated Small Angle Neutron Scattering (SEMSANS) in Time-of-Flight (ToF) mode has been shown to be a promising technique for measuring (very) small angle neutron scattering (SANS) signals and performing quantitative Dark-Field Imaging (DFI), i.e., SANS with 2D spatial resolution. However, the wavelength dependence of the modulation period in the ToF spin-echo mode has so far limited the useful modulation periods to those resolvable with the limited spatial resolution of the detectors available. Here we present our results of an approach to keep the period of the induced modulation constant for the wavelengths utilised in ToF. This is achieved by ramping the magnetic fields in the coils responsible for creating the spatially modulated beam in synchronisation with the neutron pulse, thus keeping the modulation period constant for all wavelengths. Such a setup enables the decoupling of the spatial detector resolution from the resolution of the modulation period by the use of slits or gratings in analogy to the approach in grating-based neutron DFI. Subject NeutronsMagnetic field sensorsMagnetic fieldsSpin echoesDiffraction grating To reference this document use: http://resolver.tudelft.nl/uuid:95e6e16e-3d03-48db-a7ef-ae9da43cc000 DOI https://doi.org/10.1063/1.4954727 Embargo date 2017-06-27 ISSN 0034-6748 Source Review of Scientific Instruments, 87 (6) Part of collection Institutional Repository Document type journal article Rights © 2016 Morten Sales, J. Plomp, Klaus Habicht, Anton Tremsin, W.G. Bouwman, Markus Strobl Files PDF 1.4954727.pdf 1.57 MB Close viewer /islandora/object/uuid:95e6e16e-3d03-48db-a7ef-ae9da43cc000/datastream/OBJ/view