Browsing by Author "McKinlay, J"
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- ItemThe imaging and medical beamline is expanding(Australian Nuclear Science and Technology Organisation, 2021-11-24) Häusermann, D; McKinlay, J; Morey, C; Pelliccia, DSynchrotron radiation has many advantages, but it is also flawed. And its biggest flaw happens to be its fundamental intrinsic property! The radiation is emitted in the plane of the stored beam and we are stuck with the infamous ‘letterbox door’ beam profile. At least when not tinkering with focused undulator beams. In clinical imaging research, this beam shape is a serious disadvantage. In fact, when compared with the field of view of commercial medical imaging devices, it is often the showstopper when engaging with a clinician to discuss medical application of the IMBL. So how will we image human patients in 2022, as part of our world leading research project in breast CT imaging and cancer detection? Our vertical ‘letter box opening’ at 135 meter is 3 cm, at 35 keV, with a roll off of 50%. This is far from ideal for imaging the breasts of a patient lying in a prone position on our robotic positioning and scanning stage. Consequently, we have designed and tested a Bragg-Bragg beam expander to be placed downstream of our double-bent-Laue primary monochromator. The net result is an 8 cm vertical beam profile at 135 meter, with minimal roll off, to match the vertical field of view of our new EIGER2 CdTe X 3M clinical detector. This paper will present the design of our beam expander and the results of our in-air tests. This device will be installed in vacuum in the next machine shutdown. © 2021 The Authors
- ItemMicro-Computed Tomography (MCT) beamline at ANSTO/Australian Synchrotron: a progress report(Australian Nuclear Science and Technology Organisation, 2021-11-24) Stevenson, AW; Arhatari, BD; Banerjee, R; Bosworth, R; Fiala, T; Graham, B; Griffin, E; Lee, J; McKinlay, J; Michalczyk, A; Millen, C; Oelofse, S; Ozbilgen, S; Rakman, A; Sarris, N; Tabar, E; Tissa, P; Walsh, A; Wirthensohn, J; Harvey, EThe Micro-Computed Tomography (MCT) beamline is one of the first new beamlines to be constructed at the Australian Synchrotron as part of the BRIGHT program. MCT will complement the existing X-ray imaging/tomography capability provided by the Imaging and Medical Beamline (IMBL), and will target applications requiring higher (sub-micron) spatial resolution and involving smaller samples. MCT will be a bendingmagnet beamline, operating in the 8 to 40 keV range, based on a double-multilayer monochromator. Filtered white and pink beams will also be available, the latter utilising a single-(vertical)bounce mirror. MCT will benefit from X-ray phase-contrast modalities (such as propagation-based, grating-based and speckle) in addition to conventional absorption contrast, and be equipped with a robotic stage for rapid sample exchange. A higher-resolution CT configuration based on the use of a Fresnel zone plate system will also be available. A number of sample environmental stages, such as for high temperature and the application of loads, are planned in collaboration with certain groups in the user community. Anticipated application areas for non-destructive 3D sample characterisation include biomedical/ health science, food, materials science, and palaeontology. This presentation will provide an update on the progress of the MCT project, including the procurement of three state-of-the-art X-ray detector systems, and the significant scientific-computing effort required to meet the demands of this high-performance imaging beamline. © The Authors
- ItemMicrospectroscopy beamline at the Australian synchrotron: design and capabilities(XRM Conference, 2008-07) Paterson, DJ; de Jonge, MD; McKinlay, J; Ryan, CG; Cohen, DDA hard x-ray micro-nanoprobe is being constructed at the Australian Synchrotron [1] to provide sub-micron spatial resolution across an energy range of 4.5–25 keV. The SXM will combine 2D mapping with μ-XRF, μ-XANES and μ-XAFS for elemental and chemical microanalysis. The primary design goal is to achieve sub-100 nm spatial resolution with DE/E ~10-4, and sub-ppm elemental sensitivity. The optical design is a novel “all horizontal” scheme [2]. Interchangeable Fresnel zone plates and Kirkpatrick-Baez mirrors will be used. An advanced fluorescence detector developed by BNL [3] and CSIRO [4] featuring a large solid-angle planar silicon array will enable count rates up to 108 events/sec and real-time processing with deconvoluted image projection. A differential phase contrast detection scheme [5] will be employed for quantitative measurement of soft matter [6]. The Microspectroscopy Beamline will commence operation in late 2008 and will accommodate a diverse range of environmental, biological and materials science applications to cater for the broad requirements of the Australian community. The design, anticipated performance and research applications will be discussed.
- ItemStatus of the x-ray absorption spectroscopy (XAS) beamline at the Australian synchrotron(American Institute of Physics, 2007-02-02) Glover, CJ; McKinlay, J; Clift, M; Barg, B; Boldeman, JW; Ridgway, MC; Foran, GJ; Garrett, RL; Lay, PA; Broadbent, AWe present herein the current status of the X-ray Absorption Spectroscopy (XAS) Beamline at the 3 GeV Australian Synchrotron. The optical design and performance, details of the insertion device (Wiggler), end station capabilities and construction and commissioning timeline are given.
- ItemSynchrotron macro ATR-FTIR: where we are and what’s next for live-cell measurement(Australian Nuclear Science and Technology Organisation, 2020-11-19) Vongsvivut, JP; Pérez-Guaita, D; Nankervis, L; Massey, A; Ampt, C; McKinlay, J; Sandt, C; Tobin, MJThis presentation aims to provide a summary on the recent applications of our synchrotron macro ATR-FTIR microspectroscopy, unique to the Australian Synchrotron’s Infrared Microspectroscopy (IRM) beamline. The technique provides molecular information with sub-cellular resolution down to 1-2 m beyond the resolution limit allowed for standard synchrotron-FTIR setups and further simplifies otherwise complicated sample preparation [1]. Since the technique was made available for users in 2016, this high-resolution chemical mapping capability has facilitated diverse experiments on the beamline expanding its applications into many new areas. Some of the recent examples include novel environmental sustainable geopolymer concretes [2,3], archaeological bones [4] and spider silk cross-sections [5]. The second part of the presentation will highlight further development of the macro ATR-FTIR technique specifically for live-cell measurement in an aqueous environment. Through the collaboration with the SMIS beamline at SOLEIL (France), we undertook a beamtime experiment using their inverted ATR-FTIR accessory to acquire spectra from live red blood cells. The experience and knowledge gained from this international beamtime experiment, together with the effort from our mechanical engineering team, have resulted in an optical design to be developed into the first prototype of ATR-FTIR setup for live-cell measurement. References [1] J. Vongsvivut, D. Pérez-Guaita, B. R. Wood, P. Heraud, K. Khambatta, D. Hartnell, M. J. Hackett, and M. J. Tobin, “Synchrotron Macro ATR-FTIR Microspectroscopy for High-Resolution Chemical Mapping of Single Cells,” Analyst 144, 10, 3226-3238 (2019). [2] A. Hajimohammadi, T. Ngo, J. L. Provis, T. Kim, and J. Vongsvivut, “High Strength/Density Ratio in a Syntactic Foam Made from One-Part Mix Geopolymer and Cenospheres,” Composites Part B, 173, 106908 (2019). [3] A. Hajimohammadi, T. Ngo, and J. Vongsvivut, “Interfacial Chemistry of a Fly Ash Geopolymer and Aggregates,” Journal of Cleaner Production, 231, 980-989 (2019). [4] J. J. Miszkiewicz, C. Rider, S. Kealy, C. Vrahnas, N. A. Sims, J. Vongsvivut, M. J. Tobin, M. J. L. A. Bolunia, A. S. De Leon, A. L. Peñalosa, P. S. Pagulayan, A. V. Soriano, R. Page, and M. F. Oxenham, “Asymmetric Midshaft Femur Remodelling in an Adult Male with Left Sided Hip Joint Ankylosis, Metal Period Nagsabaran, Philippines,” International Journal of Palaeopathology, 31, 14 (2020). [5] C. Haynl, J. Vongsvivut, K. R. H. Mayer, H. Bargel, V. J. Neubauer, M. J. Tobin, M. A. Elgar, and T. Scheibel, “Dimensional Stability of a Remarkable Spider Foraging Web Achieved by Synergistic Arrangement of Silk Fibers,” accepted for publication in Scientific Reports (2020)