Guiding Criteria for Instrument Design at Long-pulse Neutron Sources

7th Meeting of the Spanish Neutron Scattering Association

De Vicente, J.P.^1,2 ; Sordo, F.^1,2 ; Perlado, J.M.^2 ; Bermejo, F.J.^3 ; Fernandez-Alonso, F.^4,5

Consorcio ESS-Bilbao, Polígono Ugaldeguren III, Pol. A, 7B, Zamudio

48170, Spain^1

Instituto de Fusión Nuclear, José Gutiérrez de Abascal, 2, Madrid

28006, Spain^2

Instituto de Estructura de la Materia, IEM-CSIC, Consejo Superior de Investigaciones Científicas, Serrano 123, Madrid

28006, Spain^3

ISIS Facility, Rutherford Appleton Laboratory, Chilton-Didcot, Oxfordshire

OX11 0QX, United Kingdom^4

Department of Physics and Astronomy, University College London, Gower Street, London

WC1E 6BT, United Kingdom^5

关键词: Dynamic range;    High resolution;    Instrument designs;    Long pulse;    Modulation techniques;    Spallation sources;    Time domain;    Variable resolution;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/663/1/012011/pdf
DOI  :  10.1088/1742-6596/663/1/012011

来源: IOP

【 摘 要 】

We introduce and describe general criteria which characterize long-pulse neutron sources, with a view to guiding and facilitating subsequent instrument design and optimization for specific applications. The ensuing analysis shows that a long-pulse neutron source allows for the possibility of a wide range of flexible instrument concepts with variable resolution and dynamic range, tasks which invariably require the implementation of pulse-modulation techniques in the time domain, particularly for high-resolution applications. We also consider in some detail yet-to-be-tapped opportunities in the use of shorter proton pulses, characterised by a duration commensurate with typical moderation times at spallation sources.