Radiation burnthrough measurements to infer opacity at conditions close to the solar radiative zone–convective zone boundary
File(s)POP23-AR-00031.pdf (1.5 MB)
Accepted version
Author(s)
Type
Journal Article
Abstract
Recent measurements at the Sandia National Laboratory of the x-ray transmission of iron plasma have inferred opacities much higher than predicted by theory, which casts doubt on modeling of iron x-ray radiative opacity at conditions close to the solar convective zone-radiative zone boundary. An increased radiative opacity of the solar mixture, in particular iron, is a possible explanation for the disagreement in the position of the solar convection zone-radiative zone boundary as measured by helioseismology and predicted by modeling using the most recent photosphere analysis of the elemental composition. Here, we present data from radiation burnthrough experiments, which do not support a large increase in the opacity of iron at conditions close to the base of the solar convection zone and provide a constraint on the possible values of both the mean opacity and the opacity in the x-ray range of the Sandia experiments. The data agree with opacity values from current state-of-the-art opacity modeling using the CASSANDRA opacity code.
Date Issued
2023-06
Online Publication Date
2023-06-09T13:48:54Z
Date Acceptance
2023-05-11
Citation
Physics of Plasmas, 2023, 30 (6), pp.1-15
ISSN
1070-664X
Publisher
American Institute of Physics
Start Page
1
End Page
15
Journal / Book Title
Physics of Plasmas
Volume
30
Issue
6
Copyright Statement
Copyright © 2023 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Physics of Plasmas 30, 063302 (2023) and may be found at https://doi.org/10.1063/5.0141850
Identifier
https://pubs.aip.org/aip/pop/article/30/6/063302/2895473/Radiation-burnthrough-measurements-to-infer
Publication Status
Published
Article Number
063302
Date Publish Online
2023-06-08