Parametrization of the average ionization and radiative cooling rates of carbon plasmas in a wide range of density and temperature

Gil, Juan; Rodríguez, Rafael; Florido, R.; Rubiano, J.G.; Mendoza, M.A.; Nuez, A. de la; Espinosa, G.; Martel, P.; Mı́nguez, E.

doi:10.1016/j.jqsrt.2013.02.015

Cited by 5 publications

(2 citation statements)

References 51 publications

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“…Thus, in a previous work, we studied the plasma thermodynamic regimes of optically thin steady-state carbon plasmas [64] in the range of electron temperatures and densities of 1-1000 eV and 10 10 -10 22 cm −3 , respectively, and their influence in the determination of the radiative properties. Our simulations for the monochromatic, multigroup, and mean opacities [65] and the average ionization and cooling rates [13] were also tested. For aluminum plasmas, we determined the plasma thermodynamic regimes as a function of plasma conditions and checked our simulations for the average ionization, CSDs, mean opacities, and monochromatic opacities and emissivities with other LTE and NLTE simulations [57,66].…”

Section: A Comparison With Nonlocal Thermodynamic Equilibrium Codesmentioning

confidence: 99%

“…Optically thin, hot, low-density plasmas, such as those found in interstellar and intergalactic media and stellar wind [1] or in coronal loops in stars [2,3], cool efficiently and their correct hydrodynamic simulation implies an accurate calculation of their cooling rates. Computations of these rates have been carried out in many works both in astrophysics [1,[4][5][6][7][8][9] and in magnetic fusion [10][11][12][13][14] contexts. In general, in these calculations, the plasma was assumed to be in coronal equilibrium (CE) [15], a plasma thermodynamic regime reached by optically thin plasmas at very low densities.…”

Section: Introductionmentioning

confidence: 99%

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Radiative properties for astrophysical plasma mixtures in nonlocal thermodynamic equilibrium

2018

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Radiative properties play a pivotal role in astrophysical plasma flows and are needed in radiationhydrodynamic simulations in order to understand their behavior and also to interpret the plasma emission spectra, which are valuable diagnostic tools. Radiative properties of astrophysical plasma mixtures have been commonly calculated for low-density optically thin plasmas assuming coronal equilibrium and for high density assuming local thermodynamic equilibrium. However, there are wide ranges of conditions in which these thermodynamic regimes are not achieved and the plasma is in the nonlocal thermodynamic equilibrium regime. In the present work, a study of the plasma radiative properties of oxygen and iron and an astrophysical plasma mixture in nonlocal thermodynamic steady-state equilibrium is carried out. The ranges of electron temperatures and densities considered are 1-1000 eV and 10 11-10 20 cm −3 , respectively. In the study, departures from coronal and local thermodynamic equilibria in terms of the density and temperature are also analyzed. Large differences in the radiative properties that can reach two orders of magnitude when the plasma is far from these thermodynamic regimes are obtained. These analyses are done assuming the plasma to be optically thin. A brief study of the influence of the plasma self-absorption in the radiative properties of oxygen and iron is made. For that purpose, the plasma is assumed with planar geometry and the study is performed in terms of the width of the plasma slab and electron temperature and density.

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Section: A Comparison With Nonlocal Thermodynamic Equilibrium Codesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Radiative properties for astrophysical plasma mixtures in nonlocal thermodynamic equilibrium

2018

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Radiation influence on the plasma atomic kinetics and spectra in experiments on radiative shock waves

Rodríguez

Espinosa-Vivas

Gil

2023

Spectrochimica Acta Part B: Atomic Spectroscopy

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Experimental Investigation of Low-Pressure Microwave Plasma with Oxygen and Argon for Internal Sterilization of Medical Devices with Slender Catheters

et al. 2023

Plasma Med

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This study explores the application of microwave plasma sterilization methods to prevent surgical site infections, specifically targeting the challenge of sterilizing slender catheters used in medical devices. An experimental setup was designed to verify the sterilization effectiveness by varying input power levels, treatment times, and the ratio of injected gases. The temperature inside the sterilization setup was closely monitored to ensure that the death of bacterial spores was not caused by thermal effects. The results demonstrate that microwave plasma has a robust sterilization effect when the microwave power is 200 W, the treatment time is 10 minutes, and the ratio of oxygen to argon is higher than 14.45%. The study highlights that the sterilization effect of plasma significantly depends on the composition of the discharge gas. The experimental setup is capable of simulating sterilization inside slender catheters, indicating the potential of microwave plasma sterilization for such medical devices.

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Parametrization of the average ionization and radiative cooling rates of carbon plasmas in a wide range of density and temperature

Cited by 5 publications

References 51 publications

Radiative properties for astrophysical plasma mixtures in nonlocal thermodynamic equilibrium

Radiative properties for astrophysical plasma mixtures in nonlocal thermodynamic equilibrium

Radiation influence on the plasma atomic kinetics and spectra in experiments on radiative shock waves

Experimental Investigation of Low-Pressure Microwave Plasma with Oxygen and Argon for Internal Sterilization of Medical Devices with Slender Catheters

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