Browsing by Author "Constantine, P"

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    Evolution of the neutron-scattering capability on the OPAL reactor at ANSTO
    (Taylor & Francis Online, 2016-04-29) Klose, F; Constantine, P; Kennedy, SJ; Schulz, JC; Robinson, RA; Holden, PJ; McIntyre, GJ
    Australia is currently in the very privileged position of having the world's newest, fully operating research reactor, OPAL. As a consequence, the suite of neutron-beam instruments is also amongst the youngest and most advanced in the world, with full advantage taken in their construction of lessons learned at reactors elsewhere to develop state-of-the-art instruments that are best suited to the local and regional user communities. There are two thermal-neutron beam ports, two cold-neutron beam ports, and two (future) hot-neutron beam ports around the OPAL reactor core (see Fig. 3 in [1] and [2]). One each of the thermal-neutron and cold-neutron ports feed into a set of three guide bundles that serve the present (first) guide hall. In the initial construction phase, completed in 2007, only the outer two (TG1 and TG3) of the thermal guides, and the outer two (CG1 and CG3) of the cold guides were installed. The other thermal-neutron (TG4) and cold-neutron (CG4) guides are relatively short, to serve single instruments within the reactor beam hall with the highest flux but without eliminating line-of-sight [2]. Table 1 lists the current suite of instruments at the OPAL reactor, with brief technical details and the principal features. Figure 1 shows the layout of the current suite, with the anticipated location of the next instrument, BioRef (vide infra), indicated. We now briefly outline the evolution of the suite. © 2021 Informa UK Limited
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    The neutron beam expansion program at the Bragg Institute
    (IOP Science, 2014-01-01) Klose, F; Constantine, P; Kennedy, SJ; Robinson, RA
    The Bragg Institute is operating the neutron scattering science facilities at the Australian research reactor OPAL. The first set of seven neutron scattering instruments was provided as part of the OPAL construction project which was completed in 2007. During the period 2008 - 2013, the instrument suite was significantly expanded by a further seven instruments. In addition to this, major investments were made to establish a world-class infrastructure for supporting these instruments, including new sample environments, 3He polarisers/analysers, additional neutron guides and a Be filter option for chemical spectroscopy. Creative Commons Attribution 3.0 licence.
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    SPATZ: The second time-of-flight neutron reflectometer at the OPAL Research Reactor
    (International Conference on Neutron Scattering, 2017-07-12) Le Brun, AP; Pullen, SA; Constantine, P; Spedding, J; Roach, D; McGregor, A; Affleck, J; Christoforidis, J
    In September 2015, an agreement was signed between HZB and ANSTO to transfer the V18 ‘BioRef’ time-of-flight neutron reflectometer [1, 2], which was situated at the BER-II Research Reactor, to the OPAL Research Reactor. In September 2016 a joint team of ANSTO and HZB personnel spent four weeks carefully disassembling BioRef and packing it into shipping containers for transport to ANSTO. The instrument safely arrived in Sydney in February 2017 [3], and will be known as SPATZ (German for Sparrow). SPATZ will be the 15th neutron-scattering instrument at OPAL. SPATZ has a vertical sample geometry, which complements the current reflectometer, PLATYPUS, which has a horizontal sample geometry. The vertical sample geometry will allow for use of sample environments which cannot be currently used on PLATYPUS due to geometry constraints and allows for wide-angle diffraction from multilayers and lamellarstacks. SPATZ will continue to be equipped for simultaneous infra-red spectroscopy and reflectometry experiments, and will come with equipment for upgrades for polarisation and spin-echo techniques. The instrument will view the OPAL cold neutron source (CNS) by taking the end position of the CG2B guide. Currently, the CG2B guide is installed between the primary and secondary shutters and part of the project scope is to complete the installation of the CG2B guide beyond the secondary shutter into the Neutron Guide Hall. The CG2B guide will accommodate SPATZ and an additional upstream instrument to be determined in the future. This presentation will provide an overview of the project, its current status, and future direction.
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    SPATZ: the second time-of-flight neutron reflectometer at the OPAL Research Reactor
    (Australian Institute of Nuclear Science and Engineering (AINSE), 2018-11-19) Le Brun, AP; Constantine, P; Pullen, SA; Trapp, M; Steitz, R
    Neutron reflectometry is a powerful technique for studying the structure of surfaces and interfaces at the nanometer. The useful properties of neutrons allows for isotopic contrast variation in multicomponent systems and being able to investigate phenomena under a wide variety of sample environments. At the OPAL Research Reactor there is currently one operating neutron reflectometer – PLATYPUS, however demand is sufficient that a second is needed. In September 2015, an agreement was signed between HZB and ANSTO to transfer the V18 ‘BioRef’ time-of-flight neutron reflectometer [1], previously situated at the 10 MW BER-II Research Reactor, to the OPAL Research Reactor. During 2016, a joint team of ANSTO and HZB personnel carefully disassembled BioRef and packed it into shipping containers for transport to ANSTO. BioRef arrived at ANSTO in early 2017 and is known as SPATZ (German for Sparrow) and will be the 15th neutron-scattering instrument at OPAL. SPATZ has a vertical sample geometry, which complements PLATYPUS with its horizontal sample geometry. The vertical sample geometry will allow for use of sample environments which cannot be currently used on PLATYPUS due to geometry constraints and allows for wide-angle diffraction Page 23 ANBUG-AINSE Neutron Scattering Symposium, AANSS 2018 / Book of Abstracts from multilayers and lamellar stacks. SPATZ will also be equipped for simultaneous infra-red spectroscopy and reflectometry experiments. The instrument views the OPAL cold neutron source (CNS) by taking the end position of the CG2B guide, which has recently been installed. SPATZ is scheduled to start hot commissioning in October/November 2018 and start user experiments in early 2019. This presentation will provide an overview of the project, its current status, and future direction. Feedback from the neutron user community is encouraged. © The Authors.
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    SPATZ: The second time-of-flight neutron reflectometer at the OPAL Research Reactor
    (Australian Institute of Nuclear Science and Engineering, 2016-11-29) Le Brun, AP; Pullen, SA; Constantine, P; Spedding, J; Roach, D; McGregor, A; Affleck, J; Christoforidis, J; Trapp, M; Steitz, R
    In September 2015, an agreement was signed between HZB and ANSTO to transfer the V18 ‘BioRef’ time-of-flight neutron reflectometer [1], currently situated at the 10 MW BER-II Research Reactor, to the OPAL Research Reactor. During 2016 preparations have been made to carry out the transfer of a neutron-scattering instrument halfway around the globe. This has involved a joint team of ANSTO and HZB personnel spending four weeks carefully disassembling BioRef and packing it into shipping containers for transport to ANSTO. Once the instrument arrives it will be known as SPATZ (German for Sparrow) and will be the 15th neutron-scattering instrument at OPAL. SPATZ has a vertical sample geometry, which complements the current reflectometer, PLATYPUS, which has a horizontal sample geometry. The vertical sample geometry will allow for use of sample environments which cannot be currently used on PLATYPUS due to geometry constraints and allows for wide-angle diffraction from multilayers and lamellar stacks. SPATZ will also be equipped for simultaneous infra-red spectroscopy and reflectometry experiments, and will come with equipment for upgrades for polarisation and spin-echo techniques. The instrument will view the OPAL cold neutron source (CNS) by taking the end position of the CG2B guide. Currently, the CG2B guide is installed between the primary and secondary shutters and part of the project scope is to complete the installation of the CG2B guide beyond the secondary shutter into the Neutron Guide Hall. The CG2B guide will accommodate SPATZ and an additional upstream instrument to be determined in the future. This presentation will provide an overview of the project, its current status, and future direction. Feedback from the neutron scattering community is encouraged.