Berlin 2012 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 30: New Perspectives of Scattering at Soft Matter

CPP 30.3: Vortrag

Mittwoch, 28. März 2012, 15:45–16:00, C 264

Development of Direct Geometry Chopper spectrometers for the European Spallation Source — •Nicolo’ Violini¹, Jorg Voigt¹, Thomas Bruckel¹, Margarita Russina², Katharina Rolfs², Giovanna Simeoni³, Wiebke Lohstroh³, Luca Silvi³, and Pascale Deen⁴ — ¹Forschungszentrum Jülich GmbH, Jülich Centre for Neutron Sciences, Leo Brandt Strasse, 52425 Jülich, Germany — ²-Zentrum Berlin für Materialien, Hahn-Meitner-Platz 1, 14109 Berlin, Germany — ³Technische Universität München, Forschungsneutronenquelle Heinz Maier-Leibnitz (FRM II) Lichtenbergstrasse 1, 85747 Garching, Germany — ⁴European Spallation Source ESS AB, Box 176, 22100 Lund, Sweden

The long pulse of the ESS will provide a high neutron flux, comparable to the best existing steady state reactors. The main challenge in the instrument design at the future ESS is how to take full advantage of the high neutron peak flux and at the same time to take control over the pulse parameters to best suit the instruments and individual experiments. It has been shown that in particular direct geometry time of flight spectrometers using cold neutrons profit strongly from the long pulse at ESS. In addition the implementation of novel multiplexing techniques, such as RRM and WFM will allow the multispectral instruments to better exploit the source features. Within the German ESS Design Update Phase, we will present the recent progress in the Work Package I1 on chopper spectroscopy. We describe the main aspect of the instruments design, especially focusing on the purpose to achieve a high energy resolution (<0.5%) and its implications.