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Proceedings Paper

Science and technology progress at the Sydney University Stellar Interferometer
Author(s): J. Gordon Robertson; Michael J. Ireland; William J. Tango; Peter G. Tuthill; Benjamin A. Warrington; Yitping Kok; A. C. Rizzuto; Anthony Cheetham; Andrew P. Jacob
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Paper Abstract

This paper presents an overview of recent progress at the Sydney University Stellar Interferometer (SUSI). Development of the third-generation PAVO beam combiner has continued. The MUSCA beam combiner for high-precision differential astrometry using visible light phase referencing is under active development and will be the subject of a separate paper. Because SUSI was one of the pioneering interferometric instruments, some of its original systems are old and have become difficult to maintain. We are undertaking a campaign of modernization of systems: (1) an upgrade of the Optical Path Length Compensator IR laser metrology counter electronics from a custom system which uses an obsolete single-board computer to a modern one based on an FPGA interfaced to a Linux computer - in addition to improving maintainability, this upgrade should allow smoother motion and higher carriage speeds; (2) the replacement of the aged single-board computer local controllers for the siderostats and the longitudinal dispersion compensator has been completed; (3) the large beam reducing telescope has been replaced with a pair of smaller units with separate accessible foci. Examples of scientific results are also included.

Paper Details

Date Published: 12 September 2012
PDF: 10 pages
Proc. SPIE 8445, Optical and Infrared Interferometry III, 84450N (12 September 2012); doi: 10.1117/12.924946
Show Author Affiliations
J. Gordon Robertson, Sydney Institute for Astronomy, The Univ. of Sydney (Australia)
Michael J. Ireland, Macquarie Univ. (Australia)
Australian Astronomical Observatory (Australia)
William J. Tango, Sydney Institute for Astronomy, The Univ. of Sydney (Australia)
Peter G. Tuthill, Sydney Institute for Astronomy, The Univ. of Sydney (Australia)
Benjamin A. Warrington, Macquarie Univ. (Australia)
Yitping Kok, Sydney Institute for Astronomy, The Univ. of Sydney (Australia)
A. C. Rizzuto, Macquarie Univ. (Australia)
Anthony Cheetham, Sydney Institute for Astronomy, The Univ. of Sydney (Australia)
Andrew P. Jacob, Sydney Institute for Astronomy, The Univ. of Sydney (Australia)


Published in SPIE Proceedings Vol. 8445:
Optical and Infrared Interferometry III
Françoise Delplancke; Jayadev K. Rajagopal; Fabien Malbet, Editor(s)

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