Berlin 2012 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 30: New Perspectives of Scattering at Soft Matter

CPP 30.2: Talk

Wednesday, March 28, 2012, 15:30–15:45, C 264

Neutron spin echo instrumentation for the European Spallation Source — •Stefano Pasini and Michael Monkenbusch — Forschungszentrum Jülich, 52425 Jülich, Germany

Neutron spin echo (NSE) is the technique with the highest energy resolution for probing the dynamics of materials. At the European Spallation Source (ESS) three different instrument concepts are currently being developed together with Research Center Jülich and the Technical University of Munich. These are a high-resolution spin-echo spectrometer, a wide-angle spin-echo spectrometer and a combined MIEZE and neutron-resonance spin-echo spectrometer. We will present here the progress made in adapting the high-resolution spin-echo spectrometer to the ESS parameters. One part of the work is focused on the specification and conceptual layout of an optimized beam transport including polarization, frame-overlap choppers and avoidance of the direct view. These aspects are quite common between high-resolution and wide angle instrument. Besides the beam transport, the proper spin-echo part consists of magnetic fields for the manipulation of the spin state evolution. Some results on the specification and on the optimization of the magnetic layout of the NSE will be presented.