MLZ is a cooperation between:> Technische Universität München> Helmholtz-Zentrum Geesthacht> Forschungszentrum Jülich
RESEDA (resonance spin echo for diverse applications) is a high-resolution resonance spin-echo spectrometer installed at the cold neutron guide NL5-S in the Neutron Guide Hall West. The instrument gives access to a large time and scattering vector range for quasi-elastic measurements.
RESEDA supports longitudinal neutron resonance spin echo (LNRSE, time range from 0.001 to 20 ns for λ = 8 Å) and modulation of intensity with zero-effort (MIEZE, time range from 0.001 to 20 ns for λ = 8 Å) experiments. At RESEDA, the analysis of S(Q,τ) provides characteristic parameters, e.g. relaxation time and amplitude of the dynamic processes in the sample investigated. The determination of S(Q,τ) is feasible for different Q-values and/ or different temperatures and pressures.
NRSE experiments require non-depolarising sample environment conditions. For MIEZE experiments (and in contrast to NRSE) the spin manipulation and analysis is realised solely before the sample. Therefore, the MIEZE method enables high-resolution study of depolarising samples, under magnetic field and/ or within depolarising sample environments. However, as a consequence of the polarisation analysis before the sample, MIEZE experiments are limited to a smaller Q-range than NRSE measurements.
Next to 3He detectors, a 2D CASCADE detector with an active area of 20 cm x 20 cm characterised by a spatial resolution of 2.6 mm2 and a time dynamics of the order of a few MHz is available [1, 2].
Hence, RESEDA is in addition suited to (polarised) small angle neutron scattering (SANS) applications.
 Schmidt, C.J. et al., Journal of Physics: Conf. Ser. 251, 012067 (2010).
 Häußler, W. et al., Rev. Sci. Instr. 82, 045101 (2011).
At RESEDA the whole sample environment of the MLZ is applicable. Depolarising conditions are limited to MIEZE experiments.
Dr. Christian Franz
Phone: +49 (0)89 289-14760
Dr. Olaf Soltwedel
Phone: +49 (0)89 289-14769
Phone: +49 (0)89 289-14874
Find the latest publications regarding RESEDA in our publication database iMPULSE:
Heinz Maier-Leibnitz Zentrum. (2015). RESEDA: Resonance spin echo spectrometer. Journal of large-scale research facilities, 1, A14. http://dx.doi.org/10.17815/jlsrf-1-37
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