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A proposal to measure iron opacity at conditions close to the solar convective zone-radiative zone boundary
File | Description | Size | Format | |
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RPHDM18paper_DJHoartyv3.pdf | Accepted version | 890.06 kB | Adobe PDF | View/Open |
Title: | A proposal to measure iron opacity at conditions close to the solar convective zone-radiative zone boundary |
Authors: | Hoarty, DJ Morton, J Jeffery, M Pattison, LK Wardlow, A Mangles, SPD Rose, SJ Iglesias, C Opachich, K Heeter, RF Perry, TS |
Item Type: | Journal Article |
Abstract: | A major problem in stellar modelling is the discrepancy between solar models and helioseismology data in the position of the convective zone-radiative zone boundary in the sun. This could be explained by a large uncertainty in the calculated opacity data and recent experimental data on iron using the Sandia National Laboratory Z facility have shown large differences, up to a factor of 4, between measurement and prediction at plasma conditions close to the convective zone-radiative zone boundary. This paper describes a proposal for a radiative burn-through experiment to be fielded on NIF to observe if a radiation wave transit through a Fe2O3 sample is consistent with the factor of 2-4 change in the iron opacity seen in the Z experiments. A target design and the diagnostic method are described. A detailed radiation-hydrodynamic model has been used to generate synthetic results and explore the sensitivities and experimental accuracy needed for the proposed measurement. |
Issue Date: | Jul-2019 |
Date of Acceptance: | 14-May-2019 |
URI: | http://hdl.handle.net/10044/1/70401 |
DOI: | 10.1016/j.hedp.2019.05.003 |
ISSN: | 1574-1818 |
Publisher: | Elsevier |
Start Page: | 70 |
End Page: | 76 |
Journal / Book Title: | High Energy Density Physics |
Volume: | 32 |
Copyright Statement: | © 2019 Elsevier Ltd. All rights reserved. This manuscript is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International Licence http://creativecommons.org/licenses/by-nc-nd/4.0/ |
Keywords: | Science & Technology Physical Sciences Physics, Fluids & Plasmas Physics Plasma radiative opacity Stellar modelling Radiative transport ABUNDANCE PLASMAS 02 Physical Sciences Fluids & Plasmas |
Publication Status: | Published |
Online Publication Date: | 2019-05-14 |
Appears in Collections: | Physics Plasma Physics Faculty of Natural Sciences |