1146th General Monthly Meeting

"The frontier of measurement: leading-edge standards for length and time"

Dr Bruce Warrington, Head, Time and Frequency Group, National Measurement Institute, Lindfield, Sydney

Wednesday 6 September 2006, 6.30 for 7 pm
Conference Room 1, Darlington Centre, City Road

ABSTRACT

Metrology, the science of measurement, is a dynamic field of research. Advances in understanding and technology extend our ability to measure to ever higher levels of precision, and this capability in turn stimulates new applications. The ability to precisely measure time, or its counterpart frequency, underpins modern technology. Frequency is the physical quantity we can measure most accurately, and implements standards for many other physical units, including the metre and the volt. The SI definition of the second presently has an accuracy approaching 1 part in 1012 for commercial standards, and better than 1 part in 1015 for research-grade standards. The relatively recent development of optical 'frequency combs' will further extend this frontier of measurement. These new capabilities at unprecedented levels of precision have the potential to revolutionise our understanding of the physical world and lead to applications previously undreamt of.

BIOGRAPHICAL NOTES

Dr Bruce Warrington is the head of the Time and Frequency group at the National Measurement Institute in Lindfield, Sydney. A graduate of the University of Otago, he has a DPhil from Oxford on atomic and laser spectroscopy and fundamental physics. After postdoctoral appointments in Oxford and at the University of Washington in Seattle, he joined the CSIRO National Measurement Laboratory in 1998. He has led the time and frequency area since the formation of the National Measurement Institute in July 2004.

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