Neutron Interaction Properties of Structural Materials for Multi-Grid Neutron Detectors
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arXiv
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| Main Authors: | , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912688565649408 |
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| author | Backis, A. Lai, C. -C. Aouane, M. Deen, P. P. Fissum, K. G. Annand, J. R. M. Livingston, K. Raspino, D. |
| author_facet | Backis, A. Lai, C. -C. Aouane, M. Deen, P. P. Fissum, K. G. Annand, J. R. M. Livingston, K. Raspino, D. |
| contents | The T-REX neutron time-of-flight spectrometer at the European Spallation Source will use Multi-Grid Technology, which relies on thin B4C coatings on the Al blades of the grids to detect scattered thermal neutrons. Following a Monte Carlo study of internal shielding to suppress neutron multiple scattering in T-REX, the neutron transmission and scattering properties of 12 shielding-material samples have been measured at the ISIS spallation neutron source. Neutron transmission was measured on the EMMA beam line at wavelengths 0.5-4.7 A, using a 2D-position-sensitive, neutron GEM detector, while neutron scattering was measured for 6 of the samples at the Merlin spectrometer, at wavelengths 0.72, 1.28, 1.85 and 2.41 A. The present tests show that a B4C/Al composite material, plated with Ni to stop intrinsic alpha background, is an effective neutron absorber, suitable for incorporation in the Multi-Grid structures which detect the neutrons in inelastic neutron spectrometers . |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_02512 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Neutron Interaction Properties of Structural Materials for Multi-Grid Neutron Detectors Backis, A. Lai, C. -C. Aouane, M. Deen, P. P. Fissum, K. G. Annand, J. R. M. Livingston, K. Raspino, D. Instrumentation and Detectors The T-REX neutron time-of-flight spectrometer at the European Spallation Source will use Multi-Grid Technology, which relies on thin B4C coatings on the Al blades of the grids to detect scattered thermal neutrons. Following a Monte Carlo study of internal shielding to suppress neutron multiple scattering in T-REX, the neutron transmission and scattering properties of 12 shielding-material samples have been measured at the ISIS spallation neutron source. Neutron transmission was measured on the EMMA beam line at wavelengths 0.5-4.7 A, using a 2D-position-sensitive, neutron GEM detector, while neutron scattering was measured for 6 of the samples at the Merlin spectrometer, at wavelengths 0.72, 1.28, 1.85 and 2.41 A. The present tests show that a B4C/Al composite material, plated with Ni to stop intrinsic alpha background, is an effective neutron absorber, suitable for incorporation in the Multi-Grid structures which detect the neutrons in inelastic neutron spectrometers . |
| title | Neutron Interaction Properties of Structural Materials for Multi-Grid Neutron Detectors |
| topic | Instrumentation and Detectors |
| url | https://arxiv.org/abs/2511.02512 |