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Please use this identifier to cite or link to this item: http://apo.ansto.gov.au/dspace/handle/10238/3197

Title: 100-position robotic sample changer for powder diffraction with low-background vacuum chamber.
Authors: Olsen, SR
Pullen, SA
Avdeev, M
Keywords: OPAL Reactor
ANSTO
Reactor Instrumentation
Robots
Sample Changers
Diffractometers
Issue Date: Apr-2010
Publisher: Wiley-Blackwell
Citation: Olsen, S. R., Pullen, S. A., & Avdeev, M. (2010). 100-position robotic sample changer for powder diffraction with low-background vacuum chamber. Journal of Applied Crystallography, 43, 377-379.
Abstract: At the new Australian OPAL research reactor, experiments carried out at room temperature use a substantial fraction of beam time on the high-resolution powder diffractometer, Echidna. With an average data collection time of 2 h and a complicated safety interlock system to protect users, the need for a fully automated and remotely controlled system was quickly realized. This report presents a solution based on a commercial four-axis robot capable of loading samples from two 50-position sample trays, in any order, into an automatically evacuated chamber. This chamber significantly reduced background signal arising from air scattering, with the effect being especially pronounced at low and high 2 angles. In the case of textured or inhomogeneous samples, the system may be re-configured so that the robot rotates the sample in the beam or translates it vertically through the beam. © 2010, Wiley-Blackwell. The definitive version is available at www3.interscience.wiley.com
URI: http://dx.doi.org/10.1107/S0021889810003614
http://apo.ansto.gov.au/dspace/handle/10238/3197
ISSN: 0021-8898
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