Conceptual design of a radial collimator for MIRACLES, the time-of-flight backscattering spectrometer at the European Spallation Source

Roberto Martínez; Marton Marko; Alexander Conde; Aitor Zugazaga; Idoia Mazkiaran; Octavio G. del Moral; Giles Harper; José E.M. Pereira; Heloisa N. Bordallo; Félix J. Villacorta

doi:10.1051/epjconf/202227202010

All issues

Volume 272 (2022)

EPJ Web Conf., 272 (2022) 02010

Abstract

Open Access

Issue		EPJ Web Conf. Volume 272, 2022 QENS/WINS 2022 – 15^th Edition of the QENS Series and 10^th of the WINS Workshops


Article Number		02010
Number of page(s)		7
Section		WINS
DOI		https://doi.org/10.1051/epjconf/202227202010
Published online		17 November 2022

EPJ Web of Conferences 272, 02010 (2022)
https://doi.org/10.1051/epjconf/202227202010

Conceptual design of a radial collimator for MIRACLES, the time-of-flight backscattering spectrometer at the European Spallation Source

Roberto Martínez¹^*, Marton Marko², Alexander Conde¹, Aitor Zugazaga¹, Idoia Mazkiaran¹, Octavio G. del Moral¹, Giles Harper¹, José E.M. Pereira¹, Heloisa N. Bordallo³^,4 and Félix J. Villacorta¹

¹ ESS-Bilbao. Parque Científico y Tecnológico Bizkaia Nave 201, 48170 Zamudio, Spain
² Neutron Spectroscopy Department, Wigner Research Centre for Physics, Konkoly Th. M. 29-33, 1122 Budapest, Hungary
³ Niels Bohr Institute-University of Copenhagen. Universitetsparken 5-2100 Copenhagen, Denmark
⁴ ESS ERIC, P.O. Box 176, SE-22100 Lund, Sweden

^* Corresponding author: rmartinez@essbilbao.org

Published online: 17 November 2022

Abstract

A parametrized conceptual design for a radial collimator in a neutron backscattering instrument is presented, with application to the characteristic geometry of the MIRACLES spectrometer, that will be constructed at the European Spallation Source (ESS). The analytic development of this design has considered both the forward scattering (sample-analyzer) and backscattering (analyzer-detectors) pathways. All the characteristic dimensions (internal and external radii, slit angle) and figures of merit (such as transmission and estimated background reduction) of the device are calculated as a function of the focal points. Finally, the estimated performance of the final concept has been validated by Monte Carlo simulations.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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