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

Published online by Cambridge University Press:  12 October 2020

S. White Open the ORCID record for S. White [Opens in a new window] ,
R. Irwin ,
R. Warwick ,
G. Sarri ,
G. F. Gribakin ,
F. P. Keenan ,
E. Hill ,
S. J. Rose ,
G. J. Ferland  and
F. Wang
...Show all authors
S. White
Affiliation:
Centre for Plasma Physics, Queen's University Belfast, Antrim, UK
R. Irwin
Affiliation:
Centre for Plasma Physics, Queen's University Belfast, Antrim, UK
R. Warwick
Affiliation:
Centre for Plasma Physics, Queen's University Belfast, Antrim, UK
G. Sarri
Affiliation:
Centre for Plasma Physics, Queen's University Belfast, Antrim, UK
G. F. Gribakin
Affiliation:
Centre for Plasma Physics, Queen's University Belfast, Antrim, UK
F. P. Keenan
Affiliation:
Centre for Plasma Physics, Queen's University Belfast, Antrim, UK
E. Hill
Affiliation:
Imperial College, Faculty of Natural Sciences, London, UK
S. J. Rose
Affiliation:
Imperial College, Faculty of Natural Sciences, London, UK
G. J. Ferland
Affiliation:
Centre for Plasma Physics, Queen's University Belfast, Antrim, UK
F. Wang
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing, China
G. Zhao
Affiliation:
Department of Astronomy, Beijing Normal University, Beijing, China
B. Han
Affiliation:
Department of Astronomy, Beijing Normal University, Beijing, China
D. Riley
Affiliation:
Centre for Plasma Physics, Queen's University Belfast, Antrim, UK
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Abstract

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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.

Keywords

PlasmaPhotoionizationLab Astro
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S350: Laboratory Astrophysics: From Observations to Interpretation , April 2019 , pp. 321 - 325
Copyright
© International Astronomical Union 2020

References

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