Australian Positron Beamline Facility

Astrophysics

Positrons and Dust Grains

Positron emitters are embedded in clouds of dust grains produced by supernova. This project will explore the transport of positrons in dust grains using Monte-Carlo techniques to improve our understanding of positron transport in an astrophysically relevant setting.

Dr Joshua Machacek, Dr Daniel Murtagh

Atomic and Molecular Physics

Benchmark positron scattering experiments

Using the atomic and molecular physics positron beam at the ANU, the student will undertake measurements of positron scattering from simple targets, providing high accuracy data to test recent theoretical calculations.

A/Prof. James Sullivan, Professor Stephen Buckman, Dr Joshua Machacek

The inverse swarm problem with neural networks

The traditional approach transport simulation is to measure cross sections and feed them into a code package. However, some cross sections are very difficult to both measure and calculate. The "inverse swarm problem" seeks to extract these cross sections from transport measruements such as current profiles or annihilation rates.

Dr Daniel Cocks, A/Prof. James Sullivan, Dr Joshua Machacek

Positrons in plasma

Characterising plasmas is difficult. This project will explore the possibilty of probing a plasma using positrons by building a model and simulating a positron beam incident on a low-temperature plasma.

Dr Daniel Cocks, Dr Cormac Corr, Dr Joshua Machacek

Electron-liquid interface scattering

Low temperature plasmas are being exploited for new medical therapy techniques and in engineering applications in agriculture. This project explores the fundamental behaviour of how electrons penetrate a liquid surface, such as the skin of the body.

Dr Daniel Cocks, Dr Cormac Corr

Fragmentation of molecules by positronium

Positronium is a bound state between an electron and a positron. It is hydrogen-like with a binding energy half that of hydrogen. Positronium has been found to scatter like an electron for the same velocity. Electrons can fragment molecules by temporary attaching leading to fragmentation. This project will explore the fragmentation of molecules in positronium scattering with molecules.

Dr Joshua Machacek, A/Prof. James Sullivan, Professor Stephen Buckman

Foundations of light particles in liquids

Although much progress has been made in understand how electrons and positrons move throughout liquids, one cruicial property, V0, the "background energy" is poorly understood. This project aims to calculate V0 using an ab initio model.

Dr Daniel Cocks

Positron applications in medical physics

This is a multi-faceted project which can be adapted to students at the honours level and above. A number of possibilities exist to perform experiments directed towards improving the use of positrons in medice, mostly focussed on Positron Emission Tomography (PET).

A/Prof. James Sullivan, Professor Stephen Buckman, Dr Joshua Machacek

Positrons and Dust Grains

Positron emitters are embedded in clouds of dust grains produced by supernova. This project will explore the transport of positrons in dust grains using Monte-Carlo techniques to improve our understanding of positron transport in an astrophysically relevant setting.

Dr Joshua Machacek, Dr Daniel Murtagh

Biophysics

Positron applications in medical physics

This is a multi-faceted project which can be adapted to students at the honours level and above. A number of possibilities exist to perform experiments directed towards improving the use of positrons in medice, mostly focussed on Positron Emission Tomography (PET).

A/Prof. James Sullivan, Professor Stephen Buckman, Dr Joshua Machacek

Plasma Applications and Technology

Positrons in plasma

Characterising plasmas is difficult. This project will explore the possibilty of probing a plasma using positrons by building a model and simulating a positron beam incident on a low-temperature plasma.

Dr Daniel Cocks, Dr Cormac Corr, Dr Joshua Machacek

Electron-liquid interface scattering

Low temperature plasmas are being exploited for new medical therapy techniques and in engineering applications in agriculture. This project explores the fundamental behaviour of how electrons penetrate a liquid surface, such as the skin of the body.

Dr Daniel Cocks, Dr Cormac Corr

Theoretical Physics

Foundations of light particles in liquids

Although much progress has been made in understand how electrons and positrons move throughout liquids, one cruicial property, V0, the "background energy" is poorly understood. This project aims to calculate V0 using an ab initio model.

Dr Daniel Cocks

Updated:  17 August 2017/ Responsible Officer:  Head of Department/ Page Contact:  Physics Webmaster