Browsing by Author "Button, D"
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- Item20th International Workshop on Electron Cyclotron Resonance Ion Sources (ERCIS-2012)(Australian Nuclear Science and Technology Organisation, 2012-09-25) Button, D; Hotchkis, MAC; Lobanov, NOn behalf of the Organising Committee, I am pleased to welcome you to the 20th International Workshop on Electron Cyclotron Resonance Ion Sources (ECRIS-2012), being held in Sydney, Australia, from 25th-28th September 2012. Following the last workshop in Grenoble, the birthplace of ECR ion sources, it is perhaps fitting that the workshop comes to Sydney this year, on the very opposite side of the planet, to show that ECRIS science and technology has indeed literally spread all around the world. The workshop will focus on the latest developments in performance, modelling and applications of ECR ion sources along with the associated physics and technologies. The workshop is organised by the Australian Nuclear Science and Technology Organisation (ANSTO), with the support of the Australian Institute of Nuclear Science and Engineering, the Australian National University in Canberra and the Australian Collaboration for Accelerator Science.
- ItemAccelerator mass spectrometry on SIRIUS: new 6MV spectrometer at ANSTO(University of Jyväskylä, Finland, 2016-07-03) Wilcken, KM; Fink, D; Hotchkis, MAC; Garton, D; Button, D; Mann, M; Kitchen, RAs a part of Australian Federal Government funding in 2009 to establish a centre for accelerator science a new 6 MV state of the art accelerator – SIRIUS – was purchased. The system is now commissioned and comprises ion sources and beam lines to cater for a wide variety of both IBA and AMS applications. The ion source used for AMS (MC-SNICS) is the latest incarnation followed by 45 degree spherical ESA(R=0.3 m) and double focusing injection magnet (R=1 m, ME=20) prior the accelerator. At the terminal we have a choice of 2 stripper gasses and/or stripper foils. The high-energy spectrometer for AMS consists of a 1.27 m radius analyzing magnet with ME=176, 45 degree ESA (R=3.81m), followed by a switching magnet and 3 beam lines: one with a standard multianode ionization chamber; one with an absorber cell in front of the detector; whereas the third beam line has a time-of- ight detector. Details of the instrument design and performance data for 10Be, 26Al and 36Cl will be presented. © The Authors
- ItemAccelerator mass spectrometry on SIRIUS: new 6MV spectrometer at ANSTO(Elsevier, 2016-07-08) Wilcken, KM; Fink, D; Hotchkis, MAC; Garton, D; Button, D; Mann, M; Kitchen, RThe Centre for Accelerator Science at ANSTO operates four tandem accelerator systems for Accelerator Mass Spectrometry (AMS) and Ion Beam Analysis (IBA). The latest addition to the fleet is SIRIUS, a 6 MV combined IBA and AMS system. Following initial ion beam testing, conditioning and debugging software and hardware, SIRIUS is now commissioned. Details of the instrument design and performance data for 10Be, 26Al and 36Cl are presented.
- ItemANSTO ECR ion source and its application to mass spectrometry(Australian Institute of Nuclear Science and Engineering (AINSE), 2007-11) Button, D; Buckley, D; Esat, TM; Hotchkis, MACAt ANSTO we have built an Electron Cyclotron Resonance (ECR) ion source to investigate new concepts for mass spectrometers [1,2] designed to measure isotopic ratios in small samples. ECR ion sources are capable of producing beams of multiply-charged atomic ions with high efficiency and are widely used as heavy ion injectors for accelerators. To meet the requirements of mass spectrometry, we have needed to adapt ECR ion source techniques to our purpose. In this presentation, these and other recent developments of our ECR ion source will be discussed.
- ItemApiezon L-type grease coating of 8-µm Nuclepore Polycarbonate coarse filters used in GENT aerosol sampling units(Australian Nuclear Science and Technology Organisation, 2006-04) Stelcer, E; Noorman, J; Button, D; Hawas, O; Cohen, DDCoarse stage Nuclepore filters used in GENT aerosol sampling units were coated with a thin film of Apiezon L-type grease in order to minimise the loss of particles on the filters due to 'bounce off'. Originally Freon was used as the solvent to dissolve the Apiezon grease in the coating process. Because of the environmental impact, Freon was discontinued and replaced with Fluorinert. Apiezon grease did not dissolve freely in the Fluorinert and it was replaced by Fomblin grease in 1995. This increased production costs and coated Nuclepore coarse filters ceased production in 2004. Users were concerned that their stocks of coated Nuclepore filters were diminishing and as no alternative supply was available the feasibility of coating the coarse filters in house needed to be investigated. This report describes experiments conducted at ANSTO and the results obtained during the investigation of the coating process under laboratory conditions. Apiezon grease and Toluene were used in this process. Experiments were based on the procedure proposed by Prof P. Hopke and Dr A. Markwitz [1] with modification to this technique to increase the uniformity of the grease layer across the filter surface and to achieve approximately 100 µg of Apiezon grease per filter.
- ItemDesign of a compact ECR ion source for medium charge state light ions(American Institute of Physics, 2012-02-01) Button, D; Hotchkis, MAC; Milford, GNAt the Australian Nuclear Science and Technology Organization we are developing a new isotope ratio mass spectrometer based on the measurement of multiple charge state ions. We have carried out a review of our existing ECR ion source and identified a number of design flaws. For the new instrument, we are producing a new ECR source and have refined the design, in particular by using 3D simulations to improve the magnetic confinement field and by a combination of simulations and experiments to improve the design of the microwave coupling. © 2012, American Institute of Physics.
- ItemDevelopment activities in the accerlerator operations group development task(Australian Nuclear Science and Technology Organisation, 2013-10-02) Button, D; Hotchkis, MACThe 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
- ItemMABI - A multi-wavelength absorption black carbon instrument for the measurement of fine light absorbing carbon particles(Elsevier, 2021-03-09) Manohar, M; Atanacio, AJ; Button, D; Cohen, DDLight absorbing carbon (LAC), also referred to as black carbon (BC) or more colloquially as soot; is generated from the partial combustion of fossil fuels and biomass. The significant research interest in BC is largely due to its aerodynamic diameter well within the 2.5 μm size fraction (known as PM2.5), as well as its abundance being a major constituent of atmospheric particulate matter, particularly in urban regions. Accurately measuring BC is crucial for researchers and regulators for identifying root causes, monitoring emission source concentrations and input into climate change models in order to identify approaches that can best mitigate its atmospheric abundance. This paper presents results from recent studies using a BC research instrument developed by ANSTO, the Multi-wavelength Absorption Black carbon Instrument (MABI). The paper describes in detail the instrument design, function and interpretation of data from measurement of filters collected from various geographical locations in Australia and Asia. This instrument measures the light absorption of LAC particles deposited on filters at seven different wavelengths ranging from 405 to 1050 nm to estimate the LAC concentration of different particle diameters in order to differentiate between LAC from high temperature fossil fuel combustion (such as diesel vehicle engines) and biomass burning. Providing a powerful tool for identifying source contributions and determining LAC content of filters using quantitative analysis. © 2021 Turkish National Committee for Air Pollution Research and Control.
- ItemThe 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, SThe 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.
- ItemThe new external ion beam capability for testing of electronics suitable for harsh space radiation environments(Australian Institute of Nuclear Science and Engineering (AINSE), 2021-11-24) Peracchi, A; Cohen, DD; Pastuovic, Z; Paneras, N; Button, D; Hall, CJ; Davies, J; Mann, M; Cookson, DJ; Hotchkis, MAC; Brenner, CMIn 2019, the Australian Space Agency made its debut in the international scene of the space exploration. Securing the future of Australia’s space sector is the core of the Advancing Space: Australian Civil space Strategy 2019-2028. This Government plan reminds that space-based technology and services not only interests space missions, but benefits all Australians daily as for weather forecasting, GPS, internet access, online banking, emergency response tracking bushfires, monitoring of farming crops, etc. To further increase capability, the Space Infrastructure Fund (SIF) investment was issued to target 7 space infrastructure projects that involve several industries, organisations, universities, laboratories, all around the country. Mission control and tracking facilities, robotic & automation, AI command and control, space data analysis facilities, space manufacturing capabilities, and space payload qualification facilities, are the topics under study. ANSTO together with other 5 fund recipients engaged its resources in the last-mentioned project (space payload qualification facilities), with the aim to establish the National Space Qualification Network (NSQN). Particularly, the three ANSTO facilities Centre for Accelerator Science (CAS), the Australian Synchrotron and the Gamma Technology Research Irradiator (GATRI) will focus on enhancing and improving their capabilities for space radiation damage testing of electronics used in space and ensure they meet international standards in this area. Space technology can be affected by cosmic radiation when Single Event Upset (SEU) occurs, knocking out temporary or permanently the instrumentation that is paramount for the successful accomplishment of a mission, a test, or simply the usual functionality of a service. We need to deep understand the cause and the frequency of these events, in order to reduce the risk of component failure and to consequently optimizse the electronics. Tests must be performed in ground-based facilities before commercialization of any device. ANSTO facilities use accelerators to perform radiation tests with different beams (gamma-rays, x-rays, protons and heavy ions) to eventually provide international standards of Total Ionisation Dosage (TID) radiation testing for products that can enter faster into global supply chains. Because of the limitations encountered while performing tests in vacuum, at the CAS facility, the High Energy Heavy Ion Microprobe (HIM) of the 10MV ANTARES accelerator has recently been upgraded to an external chamber for testing standard electronic chips in an ambient-in-air environment. Advantages of an ex-vacuum microprobe are: ease of handling the sample with no limits to the dimension of the sample itself, no charge effects, more effective target heat dissipation, sampling is not required, gain in terms of time used for pump-up and down the chamber, and possibility to irradiate living system without compromising them. © The Authors
- ItemPerformance of a new compact ERC ion source for stable isotope mass spectrometry(Australian Nuclear Science and Technology Organisation, 2014-02) Button, D; Hotchkis, MAC; Greenless, B; Magee, C; Roberts, EWe have developed a mass spectrometry system, known as the IRMS++, for measurement of isotope ratios of the light elements carbon, nitrogen and oxygen, for applications in earth and environmental sciences. By generating multiplycharged atomic ions from molecular gaseous species, such as water vapour or carbon dioxide gas, isotopes can be measured free from molecular interferences [1]. The IRMS++ uses an ECR ion source specially designed for this purpose [2]. The new ECRIS design incorporates improvements to the microwave system, with special attention to generation of the cavity mode which is expected to couple most effectively to electrons in the ECR resonance zone. Also this design has an improved magnetic field structure to optimise performance at 7GHz. In this paper we will report initial performance tests of the new ion source. © 2014, Proceedings of the 20th International Workshop on ECR Ion Sources.
- ItemPerformance of an electron cyclotron resonance ion source designed for isotope ratio mass spectrometry(American Institute of Physics, 2008-02) Hotchkis, MAC; Buckley, D; Button, DWe have designed, built, and tested an electron cyclotron resonance ion source suited to the needs of an experimental program examining new methods of isotope ratio mass spectrometry using multiply charged ions. Contaminant levels have been reduced to low levels. Sample absorption and desorption effects are under investigation and preliminary results are presented. © 2008, American Institute of Physics
- ItemProceedings of the 10th International Particle Accelerator Conference(JACoW, 2019-05-19) Boland, MP; Tanaka, H; Button, D; Dowd, RT; Schaa, VRW; Tan, YREThe 10th International Particle Accelerator Conference (IPAC’19), will be held in Melbourne, Australia from May 19 -24, 2019. The venue will be the world-leading Melbourne Convention and Exhibition Centre (MCEC) located in the spectacular Southbank precinct and overlooking Melbourne city and Yarra River. IPAC is the main international event for the worldwide accelerator community and industry. Attendees will be presented with cutting-edge accelerator research and development results and gain the latest insights into accelerator facilities across the globe. With over 1000 delegates and 70 industry exhibits, this is a unique opportunity to network with, learn from and meet a wide range of decision makers, opinion leaders, buyers and new kids on the block. Melbourne has been ranked the Word’s Most Liveable City for seven years running and is also the gateway to some of Australia’s most scenic and beautiful regions including the Great Ocean Road, Yarra Valley, Mornington Peninsula, and Central Goldfields. Melbourne itself is home to world-class restaurants, galleries, shopping, and assorted cultural highlights. At IPAC’19, you will have the opportunity to meet and interact with accelerator scientists, engineers, students, and vendors while experiencing the world’s most liveable city.
- ItemSIRIUS - a new 6MV accelerator system for IBA and AMS at ANSTO(Elsevier, 2016-03-15) Pastuovic, Z; Button, D; Cohen, DD; Fink, D; Garton, D; Hotchkis, MAC; Ionescu, M; Long, S; Levchenko, VA; Mann, M; Siegele, R; Smith, AM; Wilcken, KMThe Centre for Accelerator Science (CAS) facility at ANSTO has been expanded with a new 6 MV tandem accelerator system supplied by the National Electrostatic Corporation (NEC). The beamlines, end-stations and data acquisition software for the accelerator mass spectrometry (AMS) were custom built by NEC for rare isotope mass spectrometry, while the beamlines with end-stations for the ion beam analysis (IBA) are largely custom designed at ANSTO. An overview of the 6 MV system and its performance during testing and commissioning phase is given with emphasis on the IBA end-stations and their applications for materials modification and characterisation. © Elsevier B.V.
- ItemUse of multiply charged atomic ions for isotope ratio mass spectrometry(Wiley-Blackwell, 2008-05) Hotchkis, MAC; Button, D; Waring, CLWe have investigated the use of multiply charged atomic ions for the measurement of isotopic ratios of gaseous and vapour samples. We use a mass spectrometer system incorporating an electron cyclotron resonance (ECR) ion source for this purpose. In the cases of carbon, nitrogen and oxygen, the selection of the 2+ atomic species is found to be the most effective for obtaining reliable isotopic ratios. Using samples of carbon dioxide, nitrogen, air and water vapour, we have demonstrated the determination of the isotopic ratios C-13/C-12, N-15/N-14, O-17/O-16 and O-18/O-16. For oxygen, this technique offers an alternative to the equilibration or purification methods normally required to obtain isotopic ratios of water or other oxygen-containing samples. In particular, O-17/O-16 can be measured directly without isobaric interference from OH+. With typical ionization efficiencies of greater than 10%, ECR ion sources have the potential to enable measurements on very small samples. In addition to those evaluated in the present work, there is scope for application of this method to other sample types, to a variety of sampling methods, and to other elements. © 2008, Wiley-Blackwell.