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EDP Sciences, EPJ Web of Conferences, (83), p. 03001, 2015

DOI: 10.1051/epjconf/20158303001

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Extracting source parameters from beam monitors on a chopper spectrometer

Journal article published in 2015 by Douglas L. Ornl Abernathy ORCID, Jennifer L. Ornl Niedziela, Matthew B. Ornl Stone ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

The intensity distributions of beam monitors in direct-geometry time-of-flight neutron spectrometers provide important information about the instrument resolution. For short-pulse spallation neutron sources in particular, the asymmetry of the source pulse may be extracted and compared to Monte Carlo source simulations. An explicit formula using a Gaussian-convolved Ikeda-Carpenter distribution is given and compared to data from the ARCS instrument at the Spallation Neutron Source.