Theoretical Study of Argon Hollow Ion Spectra in Plasmas

High Energy Density Plasma (HEDP) is of great interest in research fields including Fusion and Astrophysics. Plasma spectroscopy serves as an essential, non-invasive probe of plasma conditions. Recent advances in high intensity pulsed lasers has resulted in the observation of hollow ion states in a very dense HEDP. More recently however, interest has been drawn to the study of hollow-ion states in less dense pinch-produced plasmas. While these plasmas contain the same exotic hollow-ion states, they are produced via different atomic processes, and the exact nature of these processes in pinch plasmas is yet to be fully described. We illustrate research on hollow ions in plasma using our current work on three highly ionized species of Argon: Hydrogen-like, Helium-like, and Lithium-like, and we show comparisons with published experimental data. For our future work, we look to expand on the number of ionic species and atomic processes considered as part of the model.