Pulsed neutron-beam focusing by modulating a permanent-magnet sextupole lens

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dc.contributor.authorYamada, Men_AU
dc.contributor.authorIwashita, Yen_AU
dc.contributor.authorIchikawa, Men_AU
dc.contributor.authorFuwa, Yen_AU
dc.contributor.authorTongu, Hen_AU
dc.contributor.authorShimizu, HMen_AU
dc.contributor.authorMishima, Ken_AU
dc.contributor.authorYamada, NLen_AU
dc.contributor.authorHirota, Ken_AU
dc.contributor.authorOtake, Yen_AU
dc.contributor.authorSeki, Yen_AU
dc.contributor.authorYamagata, Yen_AU
dc.contributor.authorHino, Men_AU
dc.contributor.authorKitaguchi, Men_AU
dc.contributor.authorGarbe, Uen_AU
dc.contributor.authorKennedy, SJen_AU
dc.contributor.authorLee, WTen_AU
dc.contributor.authorAndersen, KHen_AU
dc.contributor.authorGuerard, Ben_AU
dc.contributor.authorManzin, Gen_AU
dc.contributor.authorGeltenbort, Pen_AU
dc.date.accessioned2025-12-18T05:12:45Zen_AU
dc.date.available2025-12-18T05:12:45Zen_AU
dc.date.issued2015-04-07en_AU
dc.date.statistics2025-04-02en_AU
dc.description.abstractWe have developed a compact permanent-magnet sextupole lens for neutrons that can focus a pulsed beam with a wide wavelength range-the maximum wavelength being more than double the minimum-while sufficiently suppressing the effect of chromatic aberration. The bore diameter is ø15 mm. Three units of a double-ring sextupole with a length of 66mm are cascaded, resulting in a total length of 198 mm. The dynamic modulation range of the unit-averaged field gradient is 1.06 × 104-5.86 × 104 Tm-2. Permanent magnets and newly developed torquecanceling elements make the device compact, its production costs low, and its operation simpler than that of other magnetic lenses. The efficacy of this lens was verified using very cold neutrons. The diameter of the focused beam spots over the wavelength range of 27-55 Å was the same as that of the source aperture (2mm diameter) when the magnification of the optical arrangement was unity. The total beam flux over this wavelength range was enhanced by a factor of 43. The focusing distance from the source to the detector was 1.84m. In addition, in a demonstration of neutron image magnification, the image of a sample mask magnified by a factor of 4.1 was observed when the magnification of the optical arrangement was 5.0. © The Author(s) 2015. Published by Oxford University Press on behalf of the Physical Society of Japan. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.en_AU
dc.identifier.citationYamada, M., Iwashita, Y., Ichikawa, M., Fuwa, Y., Tongu, H., Shimizu, H. M., Mishima, K., Yamada, N. L., Hirota, K., Otake, Y., Seki, Y., Yamagata, Y., Hino, M., Kitaguchi, M., Garbe, U., Kennedy, S. J., Tung Lee, W., Andersen, K. H., Guerard, B., Manzin, G., & Geltenbort, P. (2015). Pulsed neutron-beam focusing by modulating a permanent-magnet sextupole lens. Progress of Theoretical and Experimental Physics, 2015(4). doi:10.1093/ptep/ptv015en_AU
dc.identifier.issn0033-068Xen_AU
dc.identifier.issn2050-3911en_AU
dc.identifier.issue4en_AU
dc.identifier.journaltitleProgress of Theoretical and Experimental Physicsen_AU
dc.identifier.pagination043g01-en_AU
dc.identifier.urihttps://doi.org/10.1093/ptep/ptv015en_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/16801en_AU
dc.identifier.volume2015en_AU
dc.languageEnglishen_AU
dc.language.isoenen_AU
dc.publisherOxford University Pressen_AU
dc.subjectNeutron beamsen_AU
dc.subjectMagnetsen_AU
dc.subjectWavelengthsen_AU
dc.subjectLensesen_AU
dc.subjectCold neutronsen_AU
dc.subjectOptical microscopyen_AU
dc.subjectChromatic aberrationsen_AU
dc.subjectMeasuring instrumentsen_AU
dc.subjectScatteringen_AU
dc.subjectNoiseen_AU
dc.subjectGeometryen_AU
dc.subjectElectromagnetic Lensesen_AU
dc.subjectSmall angle scatteringen_AU
dc.titlePulsed neutron-beam focusing by modulating a permanent-magnet sextupole lensen_AU
dc.typeJournal Articleen_AU
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