Browsing by Author "Shumack, A"
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- ItemACNS sample environment update(Australian Nuclear Science and Technology Organisation, 2021-11-25) White, R; Davidson, G; D'Adam, TM; Booth, N; Baldwin, C; Shumack, ASince the last ANSTO User Meeting the sample environment group at ACNS has supported our facility users with a range of unique developments and set ups. We have had a change in structure with the laboratory group forming and working alongside us. We will report on the progress on our ongoing projects on Direct Laser Melting (DLM) deposition system co-funded by a NSW RAAP grant. Also underway are LIEF grants with equipment for use at ACNS, one includes a rheometer for use on ACNS beam instruments. This presentation will also cover our new equipment projects funded by the NCRIS RIIP scheme. This includes new cryofurnaces, a new type of furnace, a universal testing machine and other equipment. This funding will maintain and improve our existing capabilities and increase the redundancy across the SE suite to better service competing requests. © The Authors
- ItemCurrent high-pressure capabilities at ACNS and future plans(Australian Institute of Nuclear Science and Engineering (AINSE), 2020-11-11) Maynard-Casely, HE; Booth, N; Shumack, A; Baldwin, C; White, R; Rule, KC; McIntyre, GJ; Novelli, GHigh-pressure (>1 Kbar) is a marvellous variable, which can reveal mechanical properties, structural transitions and exotic behaviours. This pairs very well with neutron scattering, where the highly penetrating nature of neutron beams is idea for accessing sample within complex sample environments. The Australian Centre for Neutron Scattering (ACNS) has developed a number of capabilities for high-pressure experiments, mainly revolving around the use of our Paris-Edinburgh press but more recently with miniature diamond-anvil cells. Some of these, such as our ability to compress radioactive samples as well as combining high-pressure and high-electric fields are unique in the world. Here we review the high pressure capabilities at ACNS, and outline some directions for capabilities and measurements.
- ItemDevelopment of Direct Laser Melting (DLM) deposition system for in-situ use on neutron beam instruments(Australian Institute of Nuclear Science and Engineering (AINSE), 2020-11-11) Baldwin, C; White, R; Paradowska, AM; Booth, N; Davidson, G; D’Adam, TM; Shumack, A; Darmann, FDirect Laser Melting (DLM) deposition is an additive manufacturing technique in which a high power laser is used to create a melt pool on a workpiece while a jet of metal powder is applied, resulting in localised material deposition. This technique is used in industry for additive repairs, cladding with dissimilar metals, or, in conjunction with a CNC milling machine, as a full-fledged 3D additive fabrication platform. As the prominence of this technology rises, so too does interest in characterising deposition dynamics over a vast parameter space. Neutron beam instruments offer unique capabilities for such characterisation. As part of the NSW Research Attraction and Acceleration Program, ACNS is developing world first sample environment capabilities enabling in-situ laser metal deposition, for use on KOWARI and DINGO beamline. The system will utilise a self-contained motion stage and laser cladding head which will construct a thin wall structure on a user specified substrate, utilising up to two metal powders at a time. Neutron studies of the melt pool or heat affected zone can then be performed during and after printing. This paper will present the technical specifications and capabilities of the system, which will be available to the user community in late 2021. © The authors.
- ItemTwo pressure cells for quasielastic and inelastic neutron scatterings(EDP Sciences, 2022-11-17) Yuan, B; Mole, RA; Wang, CW; Shumack, A; White, R; Li, B; Tong, X; Yu, DHTwo clamp pressure cells for QENS and INS have been developed. One is a hybrid CuBe/NiCrAl cell which is for relative high pressure up to 2.5 GPa and another one is made from high strength aluminium alloy (mesolite NA723) with pressure up to 0.5 GPa. The sample volume is 0.3 mL and 1 mL, respectively. The pressure cells have been thoroughly calibrated and tested. In addition, the contribution to phonon density of states from the pressure cells has been evaluated. Measurements of the phonon density of states for two perfluorocarbon polymer liquids FOMBLIN oil and Fluorinert have indicated that they are suitable to serve as the low background pressure transmission media for high pressure INS experiments. The applications of the pressure cells for INS and QENS are demonstrated by studies of pressure-induced phase transition of plastic crystals. © The Authors, published by EDP Sciences, 2022. This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0/).