Meurisse, Alexandre and Cazzaniga, C and Frost, C and Barnes, Andrew and Makkaya, Advenit and Sperl, Matthias (2020) Neutron radiation shielding with sintered lunar regolith. Radiation Measurements, 132, p. 106247. Elsevier. doi: 10.1016/j.radmeas.2020.106247. ISSN 1350-4487.
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Official URL: https://doi.org/10.1016/j.radmeas.2020.106247
Abstract
Lunar regolith simulant is exposed to a fast neutron flux of a spallation source. The samples consisted of a set of as-received, traditionally sintered, and solar sintered JSC-2A lunar regolith simulant. Aluminium samples were also irradiated for comparison. The ChipIr beamline of the ISIS neutron and muon source was used to provide a flux of atmospheric-like neutrons. The shielding properties of the different samples were measured for transmission, by counting neutrons before and after the samples using fast neutron detectors. Monte-Carlo simulations were carried out concurrently. The simulations are in good agreement with measurements. Aluminium simulations have shown to be in better accordance with the experimental results, probably because less affected by systematic errors. As for regolith shielding, a sensitivity analysis showed the low impact of the variations in regolith composition on the shielding properties. The benchmark of the simulations has allowed an independent estimate of the required level of regolith shielding needed to cope with primary and secondary radiation emissions. For galactic cosmic rays a value > 200 g/cm2 is estimated to give >50% reduction in transmission. For solar particle events a few 10s of g/cm2 can reduce the dose by more than an order of magnitude.
Item URL in elib: | https://elib.dlr.de/134281/ | ||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||
Title: | Neutron radiation shielding with sintered lunar regolith | ||||||||||||||||||||||||||||
Authors: |
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Date: | 24 January 2020 | ||||||||||||||||||||||||||||
Journal or Publication Title: | Radiation Measurements | ||||||||||||||||||||||||||||
Refereed publication: | Yes | ||||||||||||||||||||||||||||
Open Access: | No | ||||||||||||||||||||||||||||
Gold Open Access: | No | ||||||||||||||||||||||||||||
In SCOPUS: | Yes | ||||||||||||||||||||||||||||
In ISI Web of Science: | Yes | ||||||||||||||||||||||||||||
Volume: | 132 | ||||||||||||||||||||||||||||
DOI: | 10.1016/j.radmeas.2020.106247 | ||||||||||||||||||||||||||||
Page Range: | p. 106247 | ||||||||||||||||||||||||||||
Publisher: | Elsevier | ||||||||||||||||||||||||||||
ISSN: | 1350-4487 | ||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||
Keywords: | regolith, Monte-Carlo simulations, shielding, lunar exploration | ||||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||||||
HGF - Program: | Space | ||||||||||||||||||||||||||||
HGF - Program Themes: | Research under Space Conditions | ||||||||||||||||||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||||||||||||||||||
DLR - Program: | R FR - Research under Space Conditions | ||||||||||||||||||||||||||||
DLR - Research theme (Project): | R - Model systems | ||||||||||||||||||||||||||||
Location: | Köln-Porz | ||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Materials Physics in Space | ||||||||||||||||||||||||||||
Deposited By: | Sperl, Matthias | ||||||||||||||||||||||||||||
Deposited On: | 02 Mar 2020 09:14 | ||||||||||||||||||||||||||||
Last Modified: | 02 Mar 2020 09:14 |
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