Conference Publications

This community mainly contains citations, yet where permitted, the full text, of the conference papers, presentations, posters and abstracts written by ANSTO authors.

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Browsing Conference Publications by Subject "Accelerator experimental facilities"

Now showing 1 - 9 of 9
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    Applications of online optimization algorithms for injection at the Australian Synchrotron
    (JACoW Publishing, 2019-05-19) Auchettl, R; Dowd, RT
    Accelerators have hundreds of design parameters that makeup the design space. The optimization of complex nonlinear systems (like accelerators) is not straightforward. Trade-offs between competing nonlinear design variables means that optimizing a target objective (such as optics matching) can lack any obvious deterministic method. At the Australian Synchrotron, accelerator tuning predominantly occurs via manual optimization or traditional optimization techniques such as the Linear Optics from Closed Orbits (LOCO) algorithm. While we have had distinct success with the implementation of LOCO [1] and manual tuning, these strategies are not without their downsides. Some situations (such as the optimization of synchrotron beam dynamics) produce a design space too large and multifaceted for manual tuning while implementing LOCO can be computationally expensive. Also, without sufficient diagnostic systems, both LOCO and manual tuning do not necessarily guarantee that the optimal solution will be found. Motivated by the successful implementation of online optimization algorithms at SPEAR3 [2], this paper outlines the application of online optimization algorithms to improve the performance of the Australian Synchrotron injection system. We apply the efficient Robust Conjugate Direction Search (RCDS) Algorithm to reduce beam size in the storage ring.
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    A bright future for accelerator science at ANSTO
    (Australian Institute of Nuclear Science and Engineering (AINSE), 2009-11-25) Hotchkis, MAC; Child, DP; Cohen, DD; Dodson, JR; Fink, D; Garton, D; Hua, Q; Ionescu, M; Jacobsen, GE; Levchenko, VA; Mifsud, C; Siegele, R; Smith, AM; Williams, AG; Winkler, S
    In the May 2009 budget, the Federal Government announced funding of $25m to ANSTO through the Education Investment Fund, to build state-of-the-art applied accelerator science facilities, by upgrading and replacing existing facilities and laboratories at ANSTO. Currently, ANSTO's researchers, jointly with researchers from all 37 Australian universities, plus other agencies such as CSIRO, government departments and local government bodies, and overseas collaborators and customers, use ANSTO's accelerator facilities for analysis of a wide range of materials, predominantly by Accelerator Mass Spectrometry (AMS) and Ion Beam Analysis (IBA). There are >100 external users of those facilities every year. © 2009 AINSE
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    Carbon ion particle therapy - from accelerators to medical application
    (Australian Nuclear Science and Technology Organisation, 2017-10-06) Prokopovich, DA
    Particle therapy is gaining increasing usage internationally with particle therapy now being routinely used as a part of the radiotherapy protocols for cancer in several countries. Australia currently has several particle therapy proposals in development, including recent funding for a South Australian proton therapy and research facility. ANSTO and others are supporting the establishment of a National Particle Treatment and Research Centre. Unlike conventional Xray therapy, which uses accelerated electrons to generate X-rays, particle therapy uses a particle accelerator to fire ions directly in a highly precise beam into the patient to spare healthy tissue and ensure conformity of the dose delivery. Carbon ion therapy facilities use accelerated 12C ions because the carbon ions have a higher Relative Biological Effectiveness (RBE) when compared to X-rays or protons, as well as a better dose conformation to a tumour. An overview of different accelerator technologies and treatment delivery methods will be given as well as highlights of the latest developments for patient dose delivery technology.
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    Custom electronics design a methodology for success
    (Australian Synchrotron, 2013-04-14) Mowbray, T
    Not available.
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    Development activities in the accerlerator operations group development task
    (Australian Nuclear Science and Technology Organisation, 2013-10-02) Button, D; Hotchkis, MAC
    The Operations Group Development team within the ANSTO Accelerator facilities are currently persuing a number of activities to further develop our equipment and technical capabilities. These include broadly; *Electron Cyclotron Resonance Ion Sources (ECRIS) * Virtual Instrumentation * Beam Profile Monitor Enhancements * Vacuum System Operation Methods * Current Digitisers/Integrators
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    Development of accelerator based micro IBA techniques for the study of environmental samples and material characterisation
    (Australian Nuclear Science and Technology Organisation, 2010-05-17) Cohen, DD; Siegele, R; Stelcer, E; Ionescu, M; Garton, D
    The Australian Nuclear Science and Technology Organisation (ANSTO) is a research establishment of around 950 people located approximately 30 km south west of Sydney, Australia. ANSTO has several research institutes, including Bragg, Radiopharm, Materials and Environment. These institutes alone include about 300 research and technical support staff. ANSTO's major neutron facility is the Open Pool Australian Light Water Reactor (OPAL). It is a 20 MW pool reactor using low enriched uranium fuel, and cooled by water. It is a multipurpose facility for radioisotope production, irradiation services and neutron beam research.
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    Evidence for recent interstellar 60Fe on Earth
    (Australian National University, 2019-09-09) Koll, D; Faestermann, T; Feige, J; Fifield, LK; Froehlich, MB; Hotchkis, MAC; Korschinek, G; Merchel, S; Panjkov, S; Pavetich, S; Tims, SG; Wallner, A
    Over the last 20 years the long-lived radionuclide 60Fe with a half-life of 2.6 Myr was shown to be an expedient astrophysical tracer to detect freshly synthesized stardust on Earth. The unprecedented sensitivity of Accelerator Mass Spectrometry for 60Fe at The Australian National University (ANU) and Technical University of Munich (TUM) allowed us to detect minute amounts of 60Fe in deep-sea crusts, nodules, sediments and on the Moon [1-5]. These signals, around 2-3 Myr and 6.5-9 Myr before present, were interpreted as a signature from nearby Supernovae which synthesized and ejected 60Fe into the local interstellar medium. Triggered by these findings, ANU and TUM independently analyzed recent surface material for 60Fe, deep-sea sediments and for the first time Antarctic snow, respectively [6, 7]. We find in both terrestrial archives corresponding amounts of recent 60Fe. We will present these discoveries, evaluate the origin of this recent influx and bring it into line with previously reported ancient 60Fe findings.
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    Ion beams and accelerators
    (Australian Nuclear Science and Technology Organisation, 2013-07-26) Cohen, DD
    Not available, slides only.
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    The new confocal heavy ion microprobe beamline at ANSTO: the first microprobe resolution tests and applications for elemental imaging and analysis
    (Elsevier B.V., 2017-08-01) Pastuovic, Z; Siegele, R; Cohen, DD; Mann, M; Ionescu, M; Button, D; Long, S
    The Centre for Accelerator Science facility at ANSTO has been expanded with the new NEC 6MV “SIRIUS” accelerator system in 2015. In this paper we present a detailed description of the new nuclear microprobe–Confocal Heavy Ion Micro-Probe (CHIMP) together with results of the microprobe resolution testing and the elemental analysis performed on typical samples of mineral ore deposits and hyper-accumulating plants regularly measured at ANSTO. The CHIMP focusing and scanning systems are based on the OM-150 Oxford quadrupole triplet and the OM-26 separated scan-coil doublet configurations. A maximum ion rigidity of 38.9amu-MeV was determined for the following nuclear microprobe configuration: the distance from object aperture to collimating slits of 5890mm, the working distance of 165mm and the lens bore diameter of 11mm. The overall distance from the object to the image plane is 7138mm. The CHIMP beamline has been tested with the 3MeV H+ and 6MeV He2+ ion beams. The settings of the object and collimating apertures have been optimized using the WinTRAX simulation code for calculation of the optimum acceptance settings in order to obtain the highest possible ion current for beam spot sizes of 1μm and 5μm. For optimized aperture settings of the CHIMP the beam brightness was measured to be ∼0.9pAμm−2mrad−2 for 3MeV H+ ions, while the brightness of ∼0.4pAμm−2mrad−2 was measured for 6MeV He2+ ions. The smallest beam sizes were achieved using a microbeam with reduced particle rate of 1000Hz passing through the object slit apertures several micrometers wide. Under these conditions a spatial resolution of ∼0.6μm×1.5μm for 3MeV H+ and ∼1.8μm×1.8μm for 6MeV He2+ microbeams in horizontal (and vertical) dimension has been achieved. The beam sizes were verified using STIM imaging on 2000 and 1000mesh Cu electron microscope grids. © 2017 Elsevier B.V.