Regensburg 2013 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 8: Poster: New Instruments and Methods
CPP 8.14: Poster
Montag, 11. März 2013, 17:30–19:30, Poster C
a cold chopper spectrometer for ESS — •Luca Silvi1,2, Wiebke Lohstroh1,2, Giovanna Simeoni1,2, Jürgen Neuhaus1,2, and Winfried Petry1,2 — 1Technische Universität München - Physik Department E13 — 2Forschungs-Neutronenquelle Heinz Maier-Leibnitz (FRM II)
The European Spallation Source (ESS) will provide a high neutron flux, comparable to the best existing steady state reactors. The proposed cold direct time-of-flight spectrometer is a versatile instrument to address important scientific cases, ranging from soft matter and biological samples to magnetic and functional materials. These materials show motions on different length and time scales, requiring an instrument with flexible to high energy resolution and a broad accessible q-range. With the maximum pulse length of 1000µ s (FWHM) usable for a clean resolution function, an energy resolution of 100 µeV at 5Å is expected, with the possibility to reach 5−10µeV at 9Å. The natural bandwidth usable for any experiment in Rate Repetition Multiplication (RRM) mode is 2.6 Å, covering a reasonable part of S(q,ω) in one measurement. The chopper and guide system of proposed instrument will be optimized for cold neutrons and will foresee the use of dedicated sample environments (polarization analysis, magnetic fields).