Design of an optimized nested-mirror neutron reflector for a NNBAR experiment

Wagner, Richard H.; Barrow, J. L.; Böhm, C.; Brooijmans, G.; Calén, H.; Cederkäll, J.; Collin, J.; Dunne, Katherine Elaine; Eklund, L.; Fierlinger, P.; Friman-Gayer, U.; Frost, Matthew; Holl, M.; Johansson, T.; Kamyshkov, Y.; Klinkby, E. B.; Kupść, A.; Meirose, B.; Milstead, D.; Nepomuceno, A. A.; Nilsson, Tomas; Öskarsson, A.; Perrey, H.; Rataj, B.; Rizzi, N.; Santoro, V.; Silverstein, S. B.; Takibayev, A.; Wolke, M.; Yiu, Sze-Chun; Young, A. R.; Zanini, L.; Zimmer, O.

doi:10.1016/j.nima.2023.168235

Cited by 2 publications

(2 citation statements)

References 21 publications

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“…As the beam is very large in this position, most samples will use only a limited fraction of the beam in an off-axis position. This implies that for a final design other NMO designs 30 , 31 apart from the the concentric Wolter optics should be considered carefully.…”

Section: Small-angle Neutron Scatteringmentioning

confidence: 99%

Neutron instrument concepts for a high intensity moderator at the European spallation source

Samothrakitis,

Bertelsen,

Willendrup

et al. 2024

Sci Rep

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In the course of the Horizon 2020 project HighNESS, a second moderator concept has been developed for the European Spallation Source, which complements the currently built moderator and is optimized for high intensity with a large viewable surface area. In this work we introduce conceptual designs for neutron instruments for condensed matter research designed to make optimal use of the capabilities of this moderator. The focus is on two concepts for small-angle neutron scattering and one neutron imaging instrument, which are intended to complement corresponding instruments that are already under construction at the European Spallation Source. One small-angle neutron scattering instrument concept resembles a conventional pinhole collimator geometry and aims to profit from the proposed second moderator by enabling to illuminate larger samples and providing particularly high resolution, drawing on a 30 m collimation and corresponding detector distance. A second small-angle neutron scattering instrument concept adopts nested mirror optics that enable to efficiently exploit the large moderator size and provide high resolution by focusing on the detector. The neutron imaging instrument concept is a typical pinhole instrument that can be found at continuous sources and draws on the corresponding strengths of high flux and large homogeneous fields-of-view, while still providing moderate wavelength resolution for advanced imaging methods.

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Section: Small-angle Neutron Scatteringmentioning

confidence: 99%

Neutron instrument concepts for a high intensity moderator at the European spallation source

Samothrakitis,

Bertelsen,

Willendrup

et al. 2024

Sci Rep

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“…The smaller opening for the neutron scattering instruments is a more uniform source. Although the integrated intensity is higher on the NNBAR side, the effective contribution of the neutrons from the corners is quite limited due to current optics design [206]. In any case, the advantage of having such a large opening in the moderator has been established, but further improvement can be made to increase the intensity farther from the center.…”

Section: Moderator Characterizationmentioning

confidence: 99%

HighNESS conceptual design report: Volume I

Santoro,

Abou El Kheir,

Acharya

et al. 2024

JNR

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The European Spallation Source, currently under construction in Lund, Sweden, is a multidisciplinary international laboratory. Once completed to full specifications, it will operate the world’s most powerful pulsed neutron source. Supported by a 3 million Euro Research and Innovation Action within the EU Horizon 2020 program, a design study (HighNESS) has been completed to develop a second neutron source located below the spallation target. Compared to the first source, designed for high cold and thermal brightness, the new source has been optimized to deliver higher intensity, and a shift to longer wavelengths in the spectral regions of cold (CN, 2–20 Å), very cold (VCN, 10–120 Å), and ultracold (UCN, >500 Å) neutrons. The second source comprises a large liquid deuterium moderator designed to produce CN and support secondary VCN and UCN sources. Various options have been explored in the proposed designs, aiming for world-leading performance in neutronics. These designs will enable the development of several new instrument concepts and facilitate the implementation of a high-sensitivity neutron-antineutron oscillation experiment (NNBAR). This document serves as the Conceptual Design Report for the HighNESS project, representing its final deliverable.

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Design of an optimized nested-mirror neutron reflector for a NNBAR experiment

Cited by 2 publications

References 21 publications

Neutron instrument concepts for a high intensity moderator at the European spallation source

Neutron instrument concepts for a high intensity moderator at the European spallation source

HighNESS conceptual design report: Volume I

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