Regensburg 2019 – wissenschaftliches Programm
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MA: Fachverband Magnetismus
MA 30: Magnetic instrumentation and characterization
MA 30.1: Vortrag
Mittwoch, 3. April 2019, 10:45–11:00, H53
Bambus: a new inelastic neutron multiplexed analyzer for Panda at MLZ — •A. Bertin1, P. Cermák2, J. A. Lim1, I. Radelytskyi2, A. Schneidewind2, and D. S. Inosov1 — 1Institut für Festörperphysik, TU Dresden, Dresden, DE — 2Forschungszentrum Jülich GmbH, Outstation at MLZ, Garching,DE
Cold-neutron triple-axis spectrometers (TAS) are dedicated to the investigation of low-energy excitations in a wide area of condensed matter physics, from quantum magnetism to unconventional superconductors. This technique allows us to measure individual points in the large (Q,E) space for one instrument setting, in particular at very low temperatures and high magnetic fields. New engineering solutions were recently developed in order to increase the useful signal on TAS. With this purpose, the multianalyser Bambus is being constructed at the cold-neutron triple-axis spectrometer Panda at MLZ, in cooperation with TU Dresden, and financial support from the BMBF project 05K16OD2. Its concept lies in collecting data at a certain energy transfers along a curved path in Q space, with the aim to construct broad reciprocal space maps at multiple energy transfers in a reliable, easy-to-use setup without movable axes. Hence, experiments will provide an overview in a large (Q,E) space, in order to get insights of broad features at low energy or study complex dispersion laws. Because this spectrometer is designed as a complementary option to the normal TAS mode, a fast switch between the two setups is foreseen. The general concept will be presented together with the final design, the different key components, and the results obtained with two prototypes.