Effects of ground movements on realistic guide models for the European Spallation Source
| Autor: | Jonas P. Hyatt, Rasmus Toft-Petersen, Kim Lefmann, M. A. Olsen, Rebekka Frøystad, Mads F. Bertelsen, Asla Husgard |
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| Rok vydání: | 2020 |
| Předmět: |
Nuclear and High Energy Physics
Work (thermodynamics) Physics - Instrumentation and Detectors Physics and Astronomy (miscellaneous) Spectrometer 010308 nuclear & particles physics Wavelength range Nuclear engineering FOS: Physical sciences Instrumentation and Detectors (physics.ins-det) Surfaces and Interfaces 01 natural sciences Wavelength Robustness (computer science) 0103 physical sciences lcsh:QC770-798 Environmental science lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Spallation Neutron 010306 general physics Ground movement |
| Zdroj: | Husgard, A, Olsen, M A, Frøystad, R, Hyatt, J P, Bertelsen, M, Toft-Petersen, R & Lefmann, K 2020, ' Effects of ground movements on realistic guide models for the European Spallation Source ', Physical Review Accelerators and Beams, vol. 23, no. 10, 103501 . https://doi.org/10.1103/PhysRevAccelBeams.23.103501 Physical Review Accelerators and Beams, Vol 23, Iss 10, p 103501 (2020) Husgard, A, Olsen, M A, Frøystad, R, Hyatt, J P, zxj803, Z, Toft-Petersen., R & Lefmann, K 2020, ' Effects of ground movements on realistic guide models for the European Spallation Source ', Physical Review Accelerators and Beams, vol. 23, no. 10, 103501 . https://doi.org/10.1103/PhysRevAccelBeams.23.103501 |
| ISSN: | 2469-9888 |
| DOI: | 10.1103/physrevaccelbeams.23.103501 |
| Popis: | We model the effect of ground movement, based on empirical experience, on the transport properties of long neutron guides by ray-tracing simulations. Our results reproduce the large losses found by an earlier study for a simple model, while for a more realistic engineering model of guide mounting, we find the losses to be significantly smaller than earlier predicted. A detailed study of the guide for the cold neutron spectrometer BIFROST at the European Spallation Source shows that the loss is 7.0(5) % for wavelengths of 2.3-4.0 {\AA}; the typical operational wavelength range of the instrument. This amount of loss does not call for mitigation by overillumination as suggested in the previous work. Our work serves to quantify the robustness of the transport properties of long neutron guides, in construction or planning at neutron facilities worldwide. Comment: 8 pages, 12 figures |
| Databáze: | OpenAIRE |
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