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Quantifying ionization in hot dense plasmas

Abstract:
Ionization is a problematic quantity in that it does not have a well-defined thermodynamic definition, yet it is a key parameter within plasma modelling. One still therefore aims to find a consistent and unambiguous definition for the ionization state. Within this context we present finite-temperature density functional theory calculations of the ionization state of carbon in CH plasmas using two potential definitions: one based on counting the number of continuum electrons, and another based on the optical conductivity. Differences of up to 10% are observed between the two methods. However, including “Pauli forbidden” transitions in the conductivity reproduces the counting definition, suggesting such transitions are important to evaluate the ionization state.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1103/PhysRevE.109.L023201

Authors


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Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Astrophysics
Role:
Author
ORCID:
0000-0001-9998-3606
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Role:
Author
ORCID:
0000-0003-1016-0975
More by this author
Institution:
University of Oxford
Division:
MPLS
Department:
Physics
Sub department:
Atomic & Laser Physics
Oxford college:
Trinity College
Role:
Author
ORCID:
0000-0003-3055-3223


Publisher:
American Physical Society
Journal:
Physical Review E More from this journal
Volume:
109
Article number:
L023201
Publication date:
2024-02-08
Acceptance date:
2023-12-07
DOI:
EISSN:
2470-0053
ISSN:
2470-0045


Language:
English
Keywords:
Pubs id:
1580033
Local pid:
pubs:1580033
Deposit date:
2023-12-11

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