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| Hauptseite > Institutssammlungen > PGI > PGI-4 > Development of a multi-band direct geometry chopper spectrometer for the future European Spallation Source > print |
| Hauptseite > Institutssammlungen > PGI > PGI-4 > Development of a multi-band direct geometry chopper spectrometer for the future European Spallation Source > print |
| 001 | 129125 | ||
| 005 | 20240619092041.0 | ||
| 037 | _ | _ | |a FZJ-2013-00645 |
| 100 | 1 | _ | |0 P:(DE-Juel1)144823 |a Violini, Nicolo |b 0 |e Corresponding author |
| 111 | 2 | _ | |a Deutsche Neutronenstreutagung |c GSI Bonn |d 2012-09-24 - 2012-09-26 |w Germany |
| 245 | _ | _ | |a Development of a multi-band direct geometry chopper spectrometer for the future European Spallation Source |
| 260 | _ | _ | |c 2012 |
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| 336 | 7 | _ | |a INPROCEEDINGS |2 BibTeX |
| 520 | _ | _ | |a Within the ESS Design Update Phase Programme funded by the German Federal ministry of education and research, we investigate the performance of a set of spectrometer concepts at the long pulse source of the ESS, which promises the applicability to a wide manifold of scientific activities of research: strongly correlated electron materials, disordered systems, functional materials, magnetism, soft-matter and biophysics. Here we present the current state-of-the-art in the study of the multi-band instrument concept and describe the main aspects of the conceptual design. The useful beam at the sample position is an important figure of merit in the evaluation of the instrument performance and can represent a limit to possible scientific applications in several circumstances, when high flux is requested. Thus the problem of the beam transport to the sample is under careful consideration, in order to transport as much as possible of the phase space density provided by the source, while maintaining as low as possible the back-ground contamination coming from the direct view of the moderator surface. The chopper system is a crucial aspect in order to achieve useful resolution for a manifold of scientific purposes. The aim is to make an efficient use of the flux provided by the source, by means of the Repetition Rate Multiplication (RRM), while reducing contamination due to very fast and very slow neutrons. We present the chopper layout under investigation and the method for the RRM implementation, based on the commensurate choppers technique. The necessary requirements for the detector development in terms of spatial and time resolution are already evaluated and the implications deriving from technical limitations on this task are discussed. Preliminary results of virtual experiments performed by means of beam neutron ray-tracing simulation packages are presented, in order to show the estimated performances, especially focusing on the resolution function evaluation. Finally we discuss the implications in the use of the polarization analysis for a large band-width instrument. |
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| 700 | 1 | _ | |0 P:(DE-Juel1)131018 |a Voigt, Jörg |b 1 |
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