Berlin 2024 – scientific programme
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MA: Fachverband Magnetismus
MA 25: Magnetic Imaging and Sensors II
MA 25.7: Talk
Wednesday, March 20, 2024, 11:00–11:15, EB 301
Devices for Correcting Phase Aberration in Longitudinal MIEZE at RESEDA — •Luke Jatho1, Denis Mettus1, Lukas Beddrich2, Johanna K. Jochum2, and Christian Pfleiderer1,2 — 1Physik Department, Technische Universität München, Garching, Germany — 2Heinz Maier-Leibnitz Zentrum (MLZ), Technische Universität München, Garching, Germany
The RESEDA instrument, situated at the FRM II facility, operates as a resonant spin-echo spectrometer utilizing the MIEZE (Modulated Intensity with Zero Effort) technique in a longitudinal geometry. While RESEDA offers access to a broad range of energy scales, its optimal resolution for momentum-transfer vectors is primarily concentrated at small scattering angles. Recent advancements have demonstrated the extension of the accessible scattering angle range through the incorporation of Magnetic Wollaston Prisms (MWPs) [1]. However, MWPs are not suited for longitudinal MIEZE. Consequently, there is a pressing need to develop a similar device capable of providing spatial-intensity modulation capabilities within the L-MIEZE geometry. In this contribution, we explore various magnetic coil configurations designed to generate the required field gradient and present the results of numerical simulations. [1] F. Li, J. Appl. Cryst. (2022). 55, 90-97
Keywords: spectroscopy; neutron scattering; MIEZE; linear phase correction