Generation of photoionized plasmas in the laboratory: Analogues to astrophysical sources

Steven White, Rachael Irwin, Jonathan Richard Warwick, Gianluca Sarri, Gleb Gribakin, Francis Keenan, E. Hill, S. J. Rose, Gary J. Ferland, Feilu Wang, G Zhao, B Han, David Riley

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Implementation of a novel experimental approach using a bright source of narrowband x-ray emission has enabled the production of a photoionized argon plasma of relevance to astrophysical modelling codes such as Cloudy. We present results showing that the photoionization parameter ζ = 4πF/ne generated using the VULCAN laser was ≈ 50 erg cm s−1, higher than those obtained previously with more powerful facilities. Comparison of our argon emission-line spectra in the 4.15 - 4.25 Å range at varying initial gas pressures with predictions from the Cloudy code and a simple time-dependent code are also presented. Finally we briefly discuss how this proof-of-principle experiment may be scaled to larger facilities such as ORION to produce the closest laboratory analogue to a photoionized plasma.

Original languageEnglish
Title of host publicationLaboratory Astrophysics: from Observations to Interpretation
PublisherCambridge University Press
Pages321-325
Number of pages5
Volume15
Edition350
DOIs
Publication statusPublished - 12 Oct 2020

Publication series

NameProceedings of the International Astronomical Union
Volume350
ISSN (Print)1743-9213

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