Speaker
Description
The KWS-1 small-angle neutron scattering instrument is operated by JCNS at MLZ [1]. The instrument covers a q-range from 0.0007 to 0.5 Å⁻¹ with a selectable wavelength span from 4.7 to 20 Å. The maximum neutron flux on the sample is 1×10⁸ cm⁻² s⁻¹, making it one of the most intense SANS instruments in the world.
The instrument is equipped with transmission supermirror polarizer, adiabatic radio-frequency spin flipper and a recently obtained dedicated magnet and polarization analyzer. The three-channel V-cavity polarizer with Fe/Si coated supermirrors (m=3.6) has an average polarization >93% and is positioned in a custom designed changer of revolver type. The flipper provides a high flipping efficiency of more than 99.9% for all neutron wavelengths. A custom designed hexapod allows heavy loads and precise sample positioning in beam (also for grazing incidence SANS under an applied magnetic field). For the experiments with the polarization analysis a 3He analyzer is utilized. The new sample magnet allows close positioning of the ³He cell to the magnet. The magnet has two orthogonal horizontal accesses. For the maximum field of 3 T (parallel to the beam) the decay time, T1, of the ³He cell approximately 50 cm away from the center of the magnet constituted 90 hours. The maximum analyzed q is 0.06 Å⁻¹.
All instrument components are running under a flexible instrument control system (NICOS).
[1] A.Feoktystov, H.Frielinghaus, Z.Di, et al., J. Appl. Cryst., 48, 61 (2015)
