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Platform for probing radiation transport properties of hydrogen at conditions found in the deep interiors of red dwarfs
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(2022) Platform for probing radiation transport properties of hydrogen at conditions found in the deep interiors of red dwarfs. Physics of Plasmas, 29 (8). 083301. doi:10.1063/5.0094579 ISSN 1089-7674.
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Official URL: https://doi.org/10.1063/5.0094579
Abstract
We describe an experimental concept at the National Ignition Facility for specifically tailored spherical implosions to compress hydrogen to extreme densities (up to [Formula: see text] solid density, electron number density [Formula: see text]) at moderate temperatures ([Formula: see text]), i.e., to conditions, which are relevant to the interiors of red dwarf stars. The dense plasma will be probed by laser-generated x-ray radiation of different photon energy to determine the plasma opacity due to collisional (free–free) absorption and Thomson scattering. The obtained results will benchmark radiation transport models, which in the case for free–free absorption show strong deviations at conditions relevant to red dwarfs. This very first experimental test of free–free opacity models at these extreme states will help to constrain where inside those celestial objects energy transport is dominated by radiation or convection. Moreover, our study will inform models for other important processes in dense plasmas, which are based on electron–ion collisions, e.g., stopping of swift ions or electron–ion temperature relaxation.
Item Type: | Journal Article | ||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||
SWORD Depositor: | Library Publications Router | ||||||
Journal or Publication Title: | Physics of Plasmas | ||||||
Publisher: | AIP Publishing | ||||||
ISSN: | 1089-7674 | ||||||
Official Date: | 12 August 2022 | ||||||
Dates: |
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Volume: | 29 | ||||||
Number: | 8 | ||||||
Article Number: | 083301 | ||||||
DOI: | 10.1063/5.0094579 | ||||||
Status: | Peer Reviewed | ||||||
Publication Status: | Published | ||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||
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