26th Australian Institute of Physics Congress and the Australian and New Zealand Conference on Optics and Photonics

Session

AIP ATMOP: Plasma

ATMOP

8 Dec 2026, 14:30

Belinda Hutchinson Building (The University of Sydney )

443. From Quantum Molecular Data to Predictive Plasma Models for Electronegative Dielectric Gases

Nathan Garland (Griffith University)

08/12/2026, 14:30

AIP | Atomic and Molecular Physics (ATMOP)

Contributed Oral

Predictive plasma modelling depends critically on the quality of the underlying atomic and molecular physics data: scattering cross sections, attachment and ionisation thresholds, dissociation energetics, fragment stabilities, and reaction pathways. This is especially important for electronegative dielectric gases, where small errors in molecular energetics can propagate into large...

539. Inelastic momentum transfer cross-sections from inelastic differential cross-sections for electron-impact excitation in Helium and in Argon

Rob Carman (Macquarie University)

08/12/2026, 14:45

AIP | Atomic and Molecular Physics (ATMOP)

Contributed Oral

For the rare-gases, the inelastic momentum transfer (IMT) cross-sections associated with electron-impact excitation and ionisation have not been studied extensively to date, although they are expected to play an important role in modelling electron transport in plasmas with improved accuracy. These cross-sections remain unavailable in most international databases. They are particularly...

585. The retrograde motion of cathode spots: dependence on cathode material

Ian Falconer (School of Physics, University of Sydney)

08/12/2026, 15:00

AIP | Atomic and Molecular Physics (ATMOP)

Contributed Oral

Cathodic arcs are a powerful technique for depositing a wide range of thin films, from diamond-like carbon to refractory materials such as tantalum. The University of Sydney’s filtered cathodic arc (SPArc) thin-film deposition system is driven by a high-current pulse that ejects material from cathode spots as they move across the cathode surface. The resulting highly ionized arc plasma is...

730. Implementation of Distorted-Wave Born Approximation Calculated Electron Ionisation Cross Sections for X-ray Tube Simulations in Geant4

Marcus Miljak (CSIRO, UNSW)

08/12/2026, 15:15

AIP | Atomic and Molecular Physics (ATMOP)

Contributed Oral

Transmission geometry X-ray tubes are popular devices used in portable and specialised X-ray spectroscopy applications due to their small size and effectiveness at low power. However, purpose-built models for predicting their X-ray emission remain absent from the literature. Scientists requiring accurate transmission geometry X-ray tube models are currently limited to imprecise alternatives....