Browsing by Author "Creagh, DC"

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    The Australian National Beamline Facility at the Photon Factory
    (American Institute of Physics, 1994) Garrett, RF; Cookson, DJ; Foran, G; Creagh, DC; Wilkins, SW
    The Australian National Beamline Facility has been installed at the Photon Factory, Tsukuba, Japan. The construction and operation of the facility has been funded by a consortium of Australian research organizations, universities, and government funding agencies, with the aim of providing Australian scientists with routine access to synchrotron radiation in the hard‐x‐ray region. The first experiments were performed at the ANBF in November 1992. The facility consists of a general purpose x‐ray‐beamline, including a simple two‐crystal monochromator, delivering either monochromatic x rays (range 5–20 keV) or white radiation to the experimental hutch. The main experimental instrument, a multiconfiguration diffractometer, has recently been installed at the beamline. This unique instrument combines vacuum operation and imaging plate detectors, and can be configured for high‐resolution powder diffraction (including a time resolved mode), protein crystallography, and triple‐axis experiments. In addition, the white or monochromatic beam can pass through the diffractometer to a secondary experimental table, where experiments such as EXAFS, Laue diffraction, topography, and microbeam measurements are performed. Details of the beamline, monochromator, and diffractometer optics and performance will be described, and an overview will be given of the experimental capabilities of the facility. © 1995 American Institute of Physics.
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    Diffraction and fluorescence studies of bushranger armour
    (Elsevier, 2004-10) Creagh, DC; Thorogood, GJ; James, M; Hallam, DC
    Bushrangers were outlaws: initially escaped convicts, but later, people at odds with the society of the day. Of these, the Kelly Gang, active in northern Victoria (Australia) in the 1880s, is probably the most notorious (http://www.nedkellysworld.com.au). In its final act of lawlessness, the Kelly gang took over the town of Glenrowan, holding more than 40 of the townspeople hostage in the pub (hotel). There four members of the gang (Kelly, Joe Byrne, and two others) wearing suits of armour which they had fabricated in the months prior to the gun-battle, were involved in a gun-battle with police. Over time stories have arisen about the fabrication of the armour. Amongst these were that the armour was made from ploughshares; by blacksmiths in a smithy, using the blacksmith's forge; that all the wearers of the armour were actively involved in the gunfight at Glenrowan. The armour we examined belonged to Joe Byrnes. Can some of the stories be validated by examination of his armour? © 2004 Elsevier Ltd.
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    Focusing monochromator and imaging-plate camera for grazing-incidence diffraction studies of thin films
    (International Union of Crystallography, 1997-08-04) Foran, GJ; Garrett, RF; Gentle, IR; Creagh, DC; Peng, JB; Barnes, GT
    A multiple-imaging-plate detector system and focusing monochromator have been developed and successfully applied to the time-resolved study of phase transitions in Langmuir–Blodgett films by grazing-incidence X-ray diffraction (GIXD). The monochromator described here combines fixed-exit-beam height with sagittal focusing of the second crystal. The design is similar to that of Matsushita et al. [Matsushita, Ishikawa & Oyanagi (1986). Nucl. Instrum. Methods, A246, 377–379], with the exception that the motion of the first crystal is achieved via a computer-controlled X-Y translation table rather than a set of cams. The second crystal is a ribbed Si(111) wafer mounted in a four-point bending mechanism. The first reported application of imaging plates to a GIXD study was carried out by our group and proved to be very successful in the determination of thin-film structure [Foran, Peng, Steitz, Barnes & Gentle (1996)[Foran, G. J., Peng, J. B., Steitz, R., Barnes, G. T. & Gentle, I. R. (1996). Langmuir, 12, 774-777.]. Langmuir, 12, 774–777]. To extend the capabilities of this system, an imaging-plate camera was designed and built which can accommodate up to 13 imaging plates (40 × 20 cm) inside the vacuum chamber of the main diffractometer at the Australian Beamline at the Photon Factory. © International Union of Crystallography