Berlin 2024 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 25: Magnetic Imaging and Sensors II
MA 25.6: Vortrag
Mittwoch, 20. März 2024, 10:45–11:00, EB 301
Portable devices for adding Spatial-Intensity-Modulation-mode capabilities to polarized neutron beams — •Denis Mettus1, Jonathan Leiner2, Johanna Jochum3, Lukas Beddrich3, and Christian Pfleiderer1 — 1Physik-Department, Technische Universität München, D-85748 Garching, Germany — 2Oak Ridge National Laboratory, Oak Ridge, TN 37830, United States — 3Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Garching, Germany
The Modulated IntEnsity with Zero Effort (MIEZE) resonant spin-echo technique implemented at the RESEDA instrument at the FRM II has its optimum resolution at small scattering angles, i.e. SANS geometries. To extend the application of MIEZE to larger scattering angles, the incorporation of magnetic Wollaston prisms (MWPs) has been suggested which would allow correction of the neutron time of flight differences restoring the signal contrast [1]. In addition to that, MWPs promises to be useful in such applications as measuring diffraction peaks with enhanced resolution at Larmor diffraction instruments, improving the resolution of small angle neutron scattering instruments, or in the context of intra-particle mode-entangled neutron beams for potential use in probing many-body quantum entanglement in materials. In the following contribution, we present the progress of the MWPs construction for use at FRM II, and describe the details of their operation and the various possibilities they offer.
[1] Fankang Li, J. Appl. Cryst. 55, 90-97 (2022).
Keywords: Neutron scattering; Polarized neutrons; Spin-echo; Spectroscopy; Neutron diffraction