High-average-power all-solid-state lasers based on new crystalline Raman materials. We have recently made significant advances in development of all-solid-state intracavity Raman lasers generating multiwatt average powers in the near infrared and (by frequency doubling) visible spectrum, with important applications in biomedicine and remote sensing. A new generation of Raman crystals, especially tungstates, offer superior optical, mechanical and thermal properties, promising high Raman gains and ....High-average-power all-solid-state lasers based on new crystalline Raman materials. We have recently made significant advances in development of all-solid-state intracavity Raman lasers generating multiwatt average powers in the near infrared and (by frequency doubling) visible spectrum, with important applications in biomedicine and remote sensing. A new generation of Raman crystals, especially tungstates, offer superior optical, mechanical and thermal properties, promising high Raman gains and choice of Stokes frequency shift. The project will investigate a range of key issues for these materials including control of the Stokes wavelength, associated polarisation control, and pump-resonator configurations giving maximum Raman laser power and efficiency. The project will lead to state-of-the-art source technology with outstanding prospects for commercialisation and practical application.Read moreRead less
High Energy Heavy Ions in Materials Science. The outcome of this project is to develop a more accurate predictor of the rate of energy loss of high energy heavy ions in solids which will have profound implications in the use of these particles in ion implantation, materials analysis and medical physics applications. It will contribute to the development of new high technology materials and to the application of high energy ions to medical treatment procedures.
Optical fibre devices for sideways delivery of laser light during keyhole surgery. Mulitmode optical fibres are typically used to deliver high power laser light which is emitted from the end of the fibre to irradiate tissue during surgery. For intravenous delivery of laser light in the treatment of cardiac fibrillation (heart flutter) we require a sideways-directed illuminating beam. However reliable methods of delivering high power laser light in a sideways-directed beam are not currently avai ....Optical fibre devices for sideways delivery of laser light during keyhole surgery. Mulitmode optical fibres are typically used to deliver high power laser light which is emitted from the end of the fibre to irradiate tissue during surgery. For intravenous delivery of laser light in the treatment of cardiac fibrillation (heart flutter) we require a sideways-directed illuminating beam. However reliable methods of delivering high power laser light in a sideways-directed beam are not currently available. Using the ultraviolet laser fibre processing expertise already developed at Macquarie University, we propose to develop and characterise novel fibre-based devices which would allow controllable delivery of light sideways.Read moreRead less
Electron and Positron Interactions with Bio-Molecules. This program of research will quantify reaction rates and elucidate reaction pathways for a range of important processes in our bodies involving ionising radiation. It will lead to a greatly improved understanding of positron and electron interactions with biological systems, including DNA and its constituent molecules and, through a better understanding of the underlying fundamental interactions, will lay foundations for improvements in te ....Electron and Positron Interactions with Bio-Molecules. This program of research will quantify reaction rates and elucidate reaction pathways for a range of important processes in our bodies involving ionising radiation. It will lead to a greatly improved understanding of positron and electron interactions with biological systems, including DNA and its constituent molecules and, through a better understanding of the underlying fundamental interactions, will lay foundations for improvements in technologies such as PET imaging. Read moreRead less
Auger-electron yields of medical radioisotopes. Large numbers of Auger electrons are emitted during the decay of many medical isotopes. Auger electrons have a short range and a strong ability to break chemical bonds. However no measurements of the number of Auger electrons per nuclear decay exist in the critical low energy regime. Calculated Auger yields are incomplete and inconsistent. Building on unique Australian expertise and instrumentation, and performing both calculations and measurements ....Auger-electron yields of medical radioisotopes. Large numbers of Auger electrons are emitted during the decay of many medical isotopes. Auger electrons have a short range and a strong ability to break chemical bonds. However no measurements of the number of Auger electrons per nuclear decay exist in the critical low energy regime. Calculated Auger yields are incomplete and inconsistent. Building on unique Australian expertise and instrumentation, and performing both calculations and measurements, his project aims to determine the number of Auger electrons per nuclear decay accurately for medical isotopes. The outcome will be accurate dose data for radioisotopes, plus essential knowledge to develop new cancer treatments based on Auger electrons, which target a fraction of a cell.Read moreRead less
Quantitative Brain Dynamics. This proposal will benefit Australia through unique and fundamental contributions to understanding brain dynamics via the development of innovative approaches and technologies. It will contribute to the national priority goals of Breakthrough Science, Frontier Technologies, and Promoting an Innovation Culture and Economy. Science outcomes will include improved understanding and probing of brain self-organization, dynamics, and function, including unique contributio ....Quantitative Brain Dynamics. This proposal will benefit Australia through unique and fundamental contributions to understanding brain dynamics via the development of innovative approaches and technologies. It will contribute to the national priority goals of Breakthrough Science, Frontier Technologies, and Promoting an Innovation Culture and Economy. Science outcomes will include improved understanding and probing of brain self-organization, dynamics, and function, including unique contributions to understanding alertness and the foundations of vision. These outcomes will be applied to develop new technologies for brain imaging and monitoring.Read moreRead less
Quantitative dynamics of functional magnetic resonance imaging. By modeling and verifying the dynamics of brain activity and blood flow that underlie functional magnetic resonance imaging (fMRI), this project will yield improved scientific outcomes and imaging sensitivity. The new data analysis techniques and technologies that result will yield potentially patentable intellectual property, and will increase the standing of Australia in this rapidly developing field, including via links being bu ....Quantitative dynamics of functional magnetic resonance imaging. By modeling and verifying the dynamics of brain activity and blood flow that underlie functional magnetic resonance imaging (fMRI), this project will yield improved scientific outcomes and imaging sensitivity. The new data analysis techniques and technologies that result will yield potentially patentable intellectual property, and will increase the standing of Australia in this rapidly developing field, including via links being built to leading international workers. The National Research Priority Goals of Frontier Technologies, Breakthrough Science, Smart Information Use, and Promoting an Innovation Economy will thus be advanced.Read moreRead less
Parametric Brain Imaging via Modeling and Analysis of Electroencephalographic Signals. Parameters of brain function and physiology will be spatially imaged with high time resolution via their effects on electroencephalographic (EEG) signals, a form of imaging that is impossible with existing methods. This will be achieved by improving existing physiologically-based models of the generation of EEGs and developing analysis tools based on fitting of model predictions to multielectrode EEG data. T ....Parametric Brain Imaging via Modeling and Analysis of Electroencephalographic Signals. Parameters of brain function and physiology will be spatially imaged with high time resolution via their effects on electroencephalographic (EEG) signals, a form of imaging that is impossible with existing methods. This will be achieved by improving existing physiologically-based models of the generation of EEGs and developing analysis tools based on fitting of model predictions to multielectrode EEG data. The results will be used to probe spatiotemporal features of EEGs in normal subjects to explore the underlying fundamental mechanisms and to infer novel parameter variations of practical relevance.Read moreRead less
Radiation protection for space, aviation, and terrestrial applications: the development of novel radiation detectors and computational techniques. Personnel in space, aviation, and terrestrial applications may be exposed to potentially harmful levels of densely ionising radiation. This project will produce improved radiation detectors and computational techniques, addressing needs in the prediction and assessment of equivalent dose in these applications. The "preventative healthcare" priority go ....Radiation protection for space, aviation, and terrestrial applications: the development of novel radiation detectors and computational techniques. Personnel in space, aviation, and terrestrial applications may be exposed to potentially harmful levels of densely ionising radiation. This project will produce improved radiation detectors and computational techniques, addressing needs in the prediction and assessment of equivalent dose in these applications. The "preventative healthcare" priority goal of the National Research Priority "Promoting and Maintaining Good Health" will be addressed, serving to reduce the risk to personnel involved in such activities. This research will also enhance Australia's international reputation in this field, stimulate local expertise, and create a critical mass of researchers in this field. Read moreRead less