| 1. |
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| 2. |
- Carlile, Colin
(författare)
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The Editor-in-Chief's parting words
- 2017
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Ingår i: Journal of Neutron Research. - 1023-8166 .- 1477-2655. ; 19:3-4, s. 85-85
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 3. |
- Hofslagare, Per
(författare)
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Residual stress measurement on fiber-metal-laminates
- 2003
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Ingår i: Journal of Neutron Research. - : Crossref. - 1023-8166 .- 1477-2655. ; 11:4, s. 215-220
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Tidskriftsartikel (refereegranskat)abstract
- A comparison between different residual stress measurement methods on fibre reinforced metal laminates was made. The methods used were X-ray diffraction, neutron diffraction and strain measurement throughout destructively produced stress release. Good agreement was found between the different methods. For these types of laminates, thermally caused residual stresses arise during manufacture. Stretch operation of the laminate will modify the residual stress state. It is well documented that the residual stress state greatly affects the fatigue properties of these laminates, not only during the fatigue initiation stage but also during fatigue crack propagation [1–3]. Neutron diffraction residual stress measurements have also been performed on fatigue-damaged material, specifically in the wake of a fatigue-induced metal crack in the laminate. Delamination and fibre degeneration occur to some extent in the surroundings of the fatigue-induced metal flaw. This will cause a relaxation of the compressive residual stress, and it will affect further development of the fatigue damage.
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| 4. |
- Lander, Gerry, et al.
(författare)
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B. T. M. (Terry) Willis (1927-2018)
- 2018
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Ingår i: Journal of Neutron Research. - : IOS Press. - 1023-8166 .- 1477-2655. ; 20:1-2, s. 41-42
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Tidskriftsartikel (populärvet., debatt m.m.)
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| 5. |
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| 6. |
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| 7. |
- Santoro, V, et al.
(författare)
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Development of high intensity neutron source at the European Spallation Source
- 2020
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Ingår i: Journal of Neutron Research. - 1023-8166 .- 1477-2655. ; 22:2-3, s. 209-219
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Tidskriftsartikel (refereegranskat)abstract
- The European Spallation Source being constructed in Lund, Sweden will provide the user community with a neutron source of unprecedented brightness. By 2025, a suite of 15 instruments will be served by a high-brightness moderator system placed above the spallation target. The ESS infrastructure, consisting of the proton linac, the target station, and the instrument halls, allows for implementation of a second source below the spallation target. We propose to develop a second neutron source with a high-intensity moderator able to (1) deliver a larger total cold neutron flux, (2) provide high intensities at longer wavelengths in the spectral regions of Cold (4–10 Å), Very Cold (10–40 Å), and Ultra Cold (several 100 Å) neutrons, as opposed to Thermal and Cold neutrons delivered by the top moderator. Offering both unprecedented brilliance, flux, and spectral range in a single facility, this upgrade will make ESS the most versatile neutron source in the world and will further strengthen the leadership of Europe in neutron science. The new source will boost several areas of condensed matter research such as imaging and spin-echo, and will provide outstanding opportunities in fundamental physics investigations of the laws of nature at a precision unattainable anywhere else. At the heart of the proposed system is a volumetric liquid deuterium moderator. Based on proven technology, its performance will be optimized in a detailed engineering study. This moderator will be complemented by secondary sources to provide intense beams of Very- and Ultra-Cold Neutrons.
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| 8. |
- Santoro, V., et al.
(författare)
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HighNESS conceptual design report: Volume I
- 2024
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Ingår i: Journal of Neutron Research. - 1023-8166 .- 1477-2655. ; 25:3-4, s. 85-314
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Tidskriftsartikel (refereegranskat)abstract
- 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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| 9. |
- Santoro, V., et al.
(författare)
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HighNESS conceptual design report: Volume II. the NNBAR experiment.
- 2024
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Ingår i: Journal of Neutron Research. - 1023-8166 .- 1477-2655. ; 25:3-4, s. 315-406
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Tidskriftsartikel (refereegranskat)abstract
- A key aim of the HighNESS project for the European Spallation Source is to enable cutting-edge particle physics experiments. This volume presents a conceptual design report for the NNBAR experiment. NNBAR would exploit a new cold lower moderator to make the first search in over thirty years for free neutrons converting to anti-neutrons. The observation of such a baryon-number-violating signature would be of fundamental significance and tackle open questions in modern physics, including the origin of the matter-antimatter asymmetry. This report shows the design of the beamline, supermirror focusing system, magnetic and radiation shielding, and anti-neutron detector necessary for the experiment. A range of simulation programs are employed to quantify the performance of the experiment and show how background can be suppressed. For a search with full background suppression, a sensitivity improvement of three orders of magnitude is expected, as compared with the previous search. Civil engineering studies for the NNBAR beamline are also shown, as is a costing model for the experiment.
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| 10. |
- Santoro, V., et al.
(författare)
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In-beam background suppression shield
- 2015
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Ingår i: Journal of Neutron Research. - 1023-8166 .- 1477-2655. ; 18:4, s. 135-144
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Tidskriftsartikel (refereegranskat)abstract
- The long (3 ms) proton pulse of the European Spallation Source (ESS) gives rise to unique and potentially high backgrounds for the instrument suite. In such a source an instrument's capabilities will be limited by its Signal to Noise (S/N) ratio. The instruments with a direct view of the moderator, which do not use a bender to help mitigate the fast neutron background, are the most challenging. For these beam lines we propose the innovative shielding of placing blocks of material directly into the guide system, which allow a minimum attenuation of the cold and thermal fluxes relative to the background suppression. This shielding configuration has been worked into a beam line model using Geant4. We study particularly the advantages of single crystal sapphire and silicon blocks.
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