Development of a new instrument to observe time-resolved neutron diffraction intensities in association with phase transitions

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dc.contributor.authorDaniels, JEen_AU
dc.contributor.authorStuder, AJen_AU
dc.contributor.authorFinlayson, TRen_AU
dc.contributor.authorHagen, MEen_AU
dc.date.accessioned2021-09-10T05:17:21Zen_AU
dc.date.available2021-09-10T05:17:21Zen_AU
dc.date.issued2005-01-31en_AU
dc.date.statistics2021-08-24en_AU
dc.description.abstractThe study of time-resolved diffraction intensities during a phase transition is important for gaining an understanding of the kinetics involved. Unfortunately the flux needed in order to achieve good counting statistics for a diffraction experiment during a single phase transition is very high. This problem is then compounded if the time scales which need to be observed are very small. Therefore techniques which can take advantage of the reversibility of some phase transitions are potentially beneficial in order to build up statistics. Stroboscopic techniques have been used in recent times to observe diffraction peak intensities with very good time resolution during the application of some type of perturbing field, driving a transition. Most commonly, and as will be the case with this instrument, high electric fields are used to switch single-crystal samples between their paraelectric and ferroelectric phases. Diffraction peaks are observed as a function of time during the switching period [1]. Other types of cycles which have also been used are stress [2], and temperature [3]. In order to carry out these types of experiments, a new capability has been added to The Australian Stress Scanner (TASS) instrument [4] at the High Flux Australian Reactor (HIFAR) operated by the Australian Nuclear Science and Technology Organisation (ANSTO). TASS is the former Triple Axis Spectrometer which, within the last couple of years, has been significantly refurbished (including the introduction of a multi-line, position-sensitive detector) to function as a two-axis diffractometer for strain mapping in engineering materials. This capability will allow for such stroboscopic experiments to be performed using the switching of high-voltage electric fields. The exact operation of the device is outlined in the experimental details section below. The common ferroelectric material, triglycine sulphate, will be used as a model crystal for the commissioning of the stroboscopic technique at HIFAR since, in a previous study involving stroboscopic diffraction intensity measurements at the ISIS [5], most unusual time dependencies for diffraction peak intensities from a TGS crystal in response to the switching of high-voltage electric fields applied to the crystal were observed.en_AU
dc.identifier.citationDaniels, J. E., Studer, A. J., Finlayson, T. R., & Hagen, M. E. (2005). Development of a new instrument to observe time-resolved neutron diffraction intensities in association with phase transitions. Paper presented to the 29th Condensed Matter and Materials Meeting, "Australian Institute of Physics Sixteenth Biennial Congress", Canberra, 2005, 31 January - 4 February 2005. Retrieved from: https://www.physics.org.au/wp-content/uploads/cmm/2005/05._Daniels_AIP2005_CMMSP.pdfen_AU
dc.identifier.conferenceenddate4 February 2005en_AU
dc.identifier.conferencename29th Condensed Matter and Materials Meeting, 'Australian Institute of Physics Sixteenth Biennial Congress'en_AU
dc.identifier.conferenceplaceCanberra, Australiaen_AU
dc.identifier.conferencestartdate31 January 2005en_AU
dc.identifier.isbn0-9598064-8-2en_AU
dc.identifier.otherCMMSP MOC34en_AU
dc.identifier.urihttps://www.physics.org.au/wp-content/uploads/cmm/2005/05._Daniels_AIP2005_CMMSP.pdfen_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11663en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectNeutron diffractionen_AU
dc.subjectPhase transformationsen_AU
dc.subjectKineticsen_AU
dc.subjectHIFAR Reactoren_AU
dc.subjectANSTOen_AU
dc.subjectSpectrometersen_AU
dc.subjectElectric potentialen_AU
dc.titleDevelopment of a new instrument to observe time-resolved neutron diffraction intensities in association with phase transitionsen_AU
dc.title.alternativeTime-resolved studies of neutron diffraction intensities in association with phase transitionsen_AU
dc.typeConference Presentationen_AU
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