In situ monochromator alignment on ANSTO’s thermal spectrometer, TAIPAN

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dc.contributor.authorSutton, Cen_AU
dc.contributor.authorRule, KCen_AU
dc.contributor.authorMcIntyre, GJen_AU
dc.contributor.authorDanilkin, SAen_AU
dc.contributor.authorStampfl, APJen_AU
dc.date.accessioned2022-08-29T23:27:49Zen_AU
dc.date.available2022-08-29T23:27:49Zen_AU
dc.date.issued2018-01-30en_AU
dc.date.statistics2021-10-11en_AU
dc.description.abstractTAIPAN is the thermal triple axis spectrometer at ANSTO and also hosts an alternate secondary spectrometer called the Be-filter. Both instruments use a common graphite monochromator (PG002) to select a single wavelength or energy of the neutrons. By rotating the monochromator with respect to the incident beam of neutrons from the reactor, the energy of the neutrons from the monochromator can vary between 5-70 meV. The PG002 monochromator is made from 63 individual crystals of highly oriented pyrolytic graphite and the neutrons are scattered from the 002 lattice planes. The benefit of separate crystals is that they can be oriented to allow for vertical focusing of the neutron beam, or horizontal focusing or double focusing, depending on the experimental requirements. Recent measurements at TAIPAN have indicated that the crystals may not be well aligned on the double focusing mechanism, leading to broad peaks that indicate an increased mosaicity. We will present our work to develop a rapid in situ laser alignment-checking procedure for the 63-crystal TAIPAN graphite monochromator. Due to the small aperture, translation, rotation and tilt of the laser, as well as rotation and tilt of the monochromators would be needed, which will involve derivation of the geometrical mathematics, construction from what we have available of a stage with the large translations needed, testing ex situ, then in situ.en_AU
dc.identifier.citationSutton, C., Rule, K. C., McIntyre, G. J., Danilkin, S., & Stampfl, A. P. J. (2018). In situ monochromator alignment on ANSTO’s thermal spectrometer, TAIPAN. Poster presented to the 42nd Annual Condensed Matter and Materials Meeting Charles Sturt University, Wagga Wagga, NSW 30th January – 2nd February, 2018, (pp. 70). Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2018/Wagga_2018_Conference_Handbook.pdfen_AU
dc.identifier.conferenceenddate2 February 2018en_AU
dc.identifier.conferencename42nd Annual Condensed Matter and Materials Meetingen_AU
dc.identifier.conferenceplaceWagga Wagga, NSWen_AU
dc.identifier.conferencestartdate30 January 2018en_AU
dc.identifier.pagination70en_AU
dc.identifier.urihttps://physics.org.au/wp-content/uploads/cmm/2018/Wagga_2018_Conference_Handbook.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/13662en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectANSTOen_AU
dc.subjectAustralian organizationsen_AU
dc.subjectCarbonen_AU
dc.subjectElementsen_AU
dc.subjectMeasuring instrumentsen_AU
dc.subjectMineralsen_AU
dc.subjectMotionen_AU
dc.subjectNational organizationsen_AU
dc.subjectNonmetalsen_AU
dc.titleIn situ monochromator alignment on ANSTO’s thermal spectrometer, TAIPANen_AU
dc.typeConference Posteren_AU
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