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Influence of Electron-Impact Multiple Ionization on Equilibrium and Dynamic Charge State Distributions: A Case Study Using Iron

Michael Hahn; Daniel Wolf Savin

Title:
Influence of Electron-Impact Multiple Ionization on Equilibrium and Dynamic Charge State Distributions: A Case Study Using Iron
Author(s):
Hahn, Michael
Savin, Daniel Wolf
Date:
Type:
Articles
Department(s):
Astrophysics Laboratory
Volume:
800
Persistent URL:
Book/Journal Title:
The Astrophysical Journal
Abstract:
We describe the influence of electron-impact multiple ionization (EIMI) on the ionization balance of collisionally ionized plasmas. Previous ionization balance calculations have largely neglected EIMI. Here, EIMI cross-section data are incorporated into calculations of both equilibrium and non-equilibrium charge-state distributions (CSDs). For equilibrium CSDs, we find that EIMI has only a small effect and can usually be ignored. However, for non-equilibrium plasmas the influence of EIMI can be important. In particular, we find that for plasmas in which the temperature oscillates there are significant differences in the CSD when including versus neglecting EIMI. These results have implications for modeling and spectroscopy of impulsively heated plasmas, such as nanoflare heating of the solar corona.
Subject(s):
Electron impact ionization
Plasma (Ionized gases)
Astrophysics
Plasma spectroscopy
Publisher DOI:
https://doi.org/10.1088/0004-637X/800/1/68
Item views
34
Metadata:
text | xml
Suggested Citation:
Michael Hahn, Daniel Wolf Savin, , Influence of Electron-Impact Multiple Ionization on Equilibrium and Dynamic Charge State Distributions: A Case Study Using Iron, Columbia University Academic Commons, .

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