Determination of corona, LTE, and NLTE regimes of optically thin carbon plasmas

Gil, Juan; Rodríguez, Rafael; Florido, R.; Rubiano, J.G.; Martel, P.; Mı́nguez, E.

doi:10.1017/s0263034608000013

Cited by 16 publications

(14 citation statements)

References 26 publications

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“…1 shows the IPD of C V in the environment of the above plasma condition. For comparison, the experimental measurement and a number of theoretical calculations carried out by Maksimchuk et al [48] and by Gil et al [49] are shown in this figure. Among these theoretical calculations, the results obtained by the Stewart-Pyatt (SP) model of Gil et al [49], the nonisolated analytical potential (NIP) model and the SP model of Maksimchuk et al [48] agree best with the experiment.…”

Section: Plasma Screening Effects On the Photoionization Cross Sectionsmentioning

confidence: 99%

Plasma screening effects on the atomic structure and radiative opacity of dense carbon plasmas based on the DLA model

Cheng

Zeng

Yuan

2011

High Energy Density Physics

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Section: Plasma Screening Effects On the Photoionization Cross Sectionsmentioning

confidence: 99%

Plasma screening effects on the atomic structure and radiative opacity of dense carbon plasmas based on the DLA model

Cheng

Zeng

Yuan

2011

High Energy Density Physics

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“…In previous works [20,25] the value for the criterion, Δp * , was fixed to 0.1 (= 10%) for the thermodynamic regime maps of carbon and aluminum and in this work for xenon the same value has been kept. In [20] was proved that taking the value of the criterion equal to 0.1 ensures that the relative differences in the average ionization, defined as…”

Section: Crss Imentioning

confidence: 99%

Determination and Analysis of the Thermodynamic Regimes of Xenon Plasmas

Rodríguez¹,

Gil²,

Florido³

et al. 2011

Contrib. Plasma Phys.

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Xenon is a common element employed, for example, as impurity in magnetically confined plasmas or the medium in which radiative shocks propagate in laboratory astrophysics. In both situations, it is required the knowledge of plasma parameters such as the average ionization, the charge state distribution, the atomic level populations and the radiative properties. In most cases, the plasmas are under non-local thermodynamic equilibrium (NLTE) conditions and these quantities should be determined by means of the so-called collisionalradiative models. For a high Z element like xenon this is a complex task and entails a high computational cost since it is necessary to solve a very large set of rate equations. In this work are characterized the thermodynamic regimes of xenon plasmas as a function of the matter density and temperature. This fact will allow us to establish in which regions of density and temperature the assumption of local thermodynamic equilibrium (LTE) is accurate and also in which regions it can be retained to estimate some plasma parameters but not others. Moreover, it is also provided information about the average ionization in a wide range of plasma conditions which covers both LTE and NLTE regimes which is valuable information in order to optimize subsequent calculations. Finally, it is also performed an analysis of the differences of NLTE and LTE simulations on several relevant plasma parameters. With this purpose, a comparison is made between the results of the calculation using detailed NLTE modeling with simulations that use the same energy level structure, but atomic populations that are forced into LTE.

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“…the literature, some qualitative criteria to estimate when an ion or ion level can be considered under LTE conditions are available. However, in this work a criterion that can state the regime of the whole plasma is employed, which is based on the weigthed relative differences between the ion populations calculated from Saha-Boltzmann (SB) equations and those obtained from the CRSS model [5,7]. When theat criterion is fulfilled we can assume that LTE regime has been achieved.…”

Section: Abako/rapcal Simulationsmentioning

confidence: 99%

Atomic Physics Modeling and Applications for ICF Plasmas

Mı́nguez

Mendoza

Rodríguez

et al. 2013

Plasma and Fusion Research

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The Atomic Physics Group at the Institute of Nuclear Fusion (DENIM) in Spain has accumulated experience over the years in developing a collection of computational models and tools for determining some relevant microscopic properties of, mainly, ICF and laser-produced plasmas in a variety of conditions. In this work several applications of those models in determining some relevant microscopic properties are presented.

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Determination of corona, LTE, and NLTE regimes of optically thin carbon plasmas

Cited by 16 publications

References 26 publications

Plasma screening effects on the atomic structure and radiative opacity of dense carbon plasmas based on the DLA model

Plasma screening effects on the atomic structure and radiative opacity of dense carbon plasmas based on the DLA model

Determination and Analysis of the Thermodynamic Regimes of Xenon Plasmas

Atomic Physics Modeling and Applications for ICF Plasmas

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