Experiments and simulations of isochorically heated warm dense carbon foam at the Texas Petawatt Laser
| العنوان: | Experiments and simulations of isochorically heated warm dense carbon foam at the Texas Petawatt Laser |
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| المؤلفون: | E. McCary, B. Bowers, Bjorn Hegelich, R. Roycroft, Herbie Smith, Hernan Quevedo, Paul A. Bradley, S. Blouin, Lin Yin, Brian Albright, Erik Vold, Gilliss Dyer, Peter Hakel |
| المصدر: | Matter and Radiation at Extremes, Vol 6, Iss 1, Pp 014403-014403-10 (2021) |
| بيانات النشر: | AIP Publishing, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Nuclear and High Energy Physics, Photosphere, Materials science, Carbon nanofoam, Mechanics, Radiation, Laser, Atomic and Molecular Physics, and Optics, law.invention, Condensed Matter::Soft Condensed Matter, Nuclear Energy and Engineering, law, Picosecond, lcsh:QC770-798, lcsh:Nuclear and particle physics. Atomic energy. Radioactivity, Electrical and Electronic Engineering, Optical depth, Beam (structure), Pyrometer |
| الوصف: | An experimental and simulation study of warm dense carbon foams at ambient density (ne ∼ 1021 cm−3) is presented. This study of isochorically heated foams is motivated by their potential application in carbon-atmosphere white-dwarf envelopes, where there are modeling uncertainties due to the equation of state. The foams are heated on an approximately picosecond time scale with a laser-accelerated proton beam. The cooling and expansion of the heated foams can be modeled with appropriately initialized radiation-hydrodynamics codes; xRAGE code is used in this work. The primary experimental diagnostic is the streaked optical pyrometer, which images a narrow band of radiation from the rear surface of the heated material. Presented are xRAGE modeling results for both solid aluminum targets and carbonized resorcinol-formaldehyde foam targets, showing that the foam appears to cool slowly on the pyrometer because of partial transparency. So that simulations of cooling foam are processed properly, it is necessary to account for finite optical depth in the photosphere calculation, and the methods for performing that calculation are presented in depth. |
| تدمد: | 2468-080X 2468-2047 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::84c7e77b2a27c87a113075f4775d8e3a https://doi.org/10.1063/5.0026595 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....84c7e77b2a27c87a113075f4775d8e3a |
| قاعدة البيانات: | OpenAIRE |
Find this article in full text from Scitation. | تدمد: | 2468080X 24682047 |
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