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EDP Sciences, EPJ Web of Conferences, (83), p. 03015, 2015

DOI: 10.1051/epjconf/20158303015

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From BASIS to MIRACLES: Benchmarking and perspectives for high- resolution neutron spectroscopy at the ESS

Journal article published in 2015 by Nikolaos Tsapatsaris, Peter K. Willendrup, Ruep E. Lechner, Heloisa N. Bordallo ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Results based on virtual instrument models for the first high flux, high resolution, spallation based, backscattering spectrometer, BASIS are presented in this paper. These were verified using the Monte Carlo instrument simulation packages McStas and VITESS. Excellent agreement of the neutron count rate at the sample position between the virtual instrument simulation and experiments was found, in both time and energy distributions. This achievement was only possible after a new component for a bent single crystal analyser in McStas, using a Gaussian approximation, was developed. These findings are pivotal to the conceptual design of the next generation backscattering spectrometer, MIRACLES at the European Spallation Source.