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Persistent URL http://purl.org/net/epubs/work/34133
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Record Id 34133
Title The present and future performance of the IRIS spectrometer as determined by Monte Carlo simulation
Abstract Accurate Monte Carlo simulations of the high resolution inelastic neutron scattering spectrometer, IRIS, have been carried out using the neutron scattering virtual instrument tool, Vitess. The current configuration of the instrument is found to be non-optimal with a mismatch between the foci of the curved graphite analyser array and the positions of the corresponding detectors. The simulations predict that an improvement of a factor of two in detected neutron flux with an accompanying improvement in resolution can be achieved by remedying this situation. The effect of employing different supermirror guide configurations has been investigated and significant improvements in the neutron flux incident on the sample can be achieved. However, this is at the expense of a degradation in beam divergence, particularly at longer wavelengths. The simulations were very cpu intensive and for the first time a GRID-computing approach was employed to demonstrate that cpu times could be dramatically shortened for this type of simulation work. Some comments and recommendations for the future of the IRIS instrument are made.
Organisation CCLRC , ISIS , ISIS-IRIS
Keywords Physics , Engineering , Simulation , IRIS , ISIS 2005
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Language English (EN)
Type Details URI(s) Local file(s) Year
Report RAL Technical Reports RAL-TR-2005-012. 2005. RAL-TR-2005-012.pdf 2005