Speaker
Description
The D7 neutron diffuse scattering instrument at the Institut Laue-Langevin [1] has been an important experimental tool in the study of disordered materials, making use of neutron polarization analysis to provide a clean and unambiguous separation of the magnetic, incoherent, and structural contributions to the scattering.
D7 has been disassembled, and the new D007 [2] started its commissioning in 2024. The upgrade promises an increase in flux by an order of magnitude with a comparable resolution.
Both diffraction and spectroscopic modes will be still available. In diffraction mode, the same momentum transfer range as D7 will be accessible (0.2 Å–1 ≲ Q ≲ 4.1 Å–1). The instrument may be converted into a polarized direct geometry time-of-flight spectrometer by adding a system of two choppers, and should offer a comparable energy resolution (0.1 meV ≤ ΔE ≤ 0.5 meV depending on the incident wavelength [3]).
[1] J. R. Stewart et al., Journal of Applied Crystallography 42, 69-84 (2009).
[2] G. J. Nilsen et al., Nuclear Instruments and Methods in Physics Research A 951, 162990 (2020).
[3] T. Fennell et al., Nuclear Instruments and Methods in Physics Research A 857, 24-30 (2017).
