Time dependent fast neutron background: understanding the cause and identifying a solution for the PELICAN cold neutron spectrometer

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dc.contributor.authorElcombe, MMen_AU
dc.contributor.authorMole, RAen_AU
dc.contributor.authorYu, DHen_AU
dc.date.accessioned2025-12-12T02:30:49Zen_AU
dc.date.available2025-12-12T02:30:49Zen_AU
dc.date.issued2018-12en_AU
dc.date.statistics2024-11-07en_AU
dc.description.abstractDuring the commissioning phase of the cold neutron chopper spectrometer PELICAN at ANSTO, a strong pulsed fast neutron background in-phase with the slave chopper has been observed. Through a series of diagnostic measurements the major components of this background have been identified. The fast neutrons are generated by photoneutron production in the Be filter as a secondary process to γ production during neutron absorption. The Be filter has been modified to minimise the fast neutron generation. Ultimately, the time dependent background has been completely removed by phasing two Fermi choppers, instead of using a Be filter to remove high order reflections from the monchromator. © 2017 Elsevier B.V.en_AU
dc.identifier.citationElcombe, M. M., Mole, R. A., & Yu, D. H. (2018). Time dependent fast neutron background: understanding the cause and identifying a solution for the PELICAN cold neutron spectrometer. Paper presented to the 11th International Conference on Neutron Scattering (ICNS 2017), 9-13 July, Daejeon, Korea. In Physica B: Condensed Matter, 551, 347-350. doi:10.1016/j.physb.2017.11.062en_AU
dc.identifier.conferenceenddate2017/07/09en_AU
dc.identifier.conferenceenddate2017/07/13en_AU
dc.identifier.conferencename11th International Conference on Neutron Scattering (ICNS 2017)en_AU
dc.identifier.conferenceplaceDaejeon, Koreaen_AU
dc.identifier.issn0921-4526en_AU
dc.identifier.journaltitlePhysica B Condensed Matteren_AU
dc.identifier.pagination347-350en_AU
dc.identifier.urihttps://doi.org/10.1016/j.physb.2017.11.062en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16780en_AU
dc.identifier.volume551en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectNeutronsen_AU
dc.subjectNeutron spectrometersen_AU
dc.subjectTime Dependenceen_AU
dc.subjectCold neutronsen_AU
dc.subjectFast neutronsen_AU
dc.subjectAbsorptionen_AU
dc.subjectMeasuring instrumentsen_AU
dc.subjectANSTOen_AU
dc.subjectFast neutronsen_AU
dc.subjectSpectrometersen_AU
dc.subjectNeutron choppersen_AU
dc.subjectMonochromatorsen_AU
dc.titleTime dependent fast neutron background: understanding the cause and identifying a solution for the PELICAN cold neutron spectrometeren_AU
dc.typeConference Paperen_AU
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