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Neutron radiation shielding with sintered lunar regolith

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

Full text not available from this repository.

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/
Document Type:Article
Title:Neutron radiation shielding with sintered lunar regolith
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Meurisse, AlexandreInstitut für Materialphysik im WeltraumUNSPECIFIED
Cazzaniga, CISISUNSPECIFIED
Frost, CISISUNSPECIFIED
Barnes, AndrewESAUNSPECIFIED
Makkaya, AdvenitESAUNSPECIFIED
Sperl, MatthiasMatthias.Sperl (at) dlr.deUNSPECIFIED
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 - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Vorhaben Modellsysteme
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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