The atomic structure of singly ionised nickel (Ni II), singly ionised tungsten (W II) and doubly ionised germanium (Ge III) are thoroughly analysed and subsequently incorporated into scattering calculations. W II is needed to ensure reliable erosion diagnostics when investigating the influx of impurities into magnetically confined fusion plasmas. The atomic data for Ni II and Ge III provide more interest for astrophysical plasmas. In order to accurately represent the collisional processes for these species, scattering calculations are carried out using the relativistic Dirac R-matrix (DARC) and the semi-relativistic Breit-Pauli (BP) R-matrix codes. The results from these calculations, along with the atomic structure data, are incorporated into collisional-radiative model programs. These collisional-radiative models provide great insight for plasma diagnostics and spectral line identification.
| Date of Award | Dec 2021 |
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| Original language | English |
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| Awarding Institution | - Queen's University Belfast
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| Sponsors | Science & Technology Facilities Council |
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| Supervisor | Catherine Ramsbottom (Supervisor) & Connor Ballance (Supervisor) |
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- Scattering data
- plasma
- opacity
- collisional
- scattering
- R-Matrix
- atomic structure
Dirac R-matrix scattering calculations in support of plasma diagnostics
Dunleavy, N. (Author). Dec 2021
Student thesis: Doctoral Thesis › Doctor of Philosophy