Kappa distribution from particle correlations in nonequilibrium, steady-state plasmas

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dc.contributor.authorDavis, Sergio
dc.contributor.authorAvaria, Gonzalo
dc.contributor.authorBora, Biswajit
dc.contributor.authorJain, Jalaj
dc.contributor.authorMoreno, José
dc.contributor.authorPavez, Cristian
dc.contributor.authorSoto, Leopoldo
dc.date.accessioned2024-06-08T15:53:32Z
dc.date.available2024-06-08T15:53:32Z
dc.date.issued2023-12
dc.descriptionIndexación: Scopus.
dc.description.abstractKappa-distributed velocities in plasmas are common in a wide variety of settings, from low-density to high-density plasmas. To date, they have been found mainly in space plasmas, but are recently being considered also in the modeling of laboratory plasmas. Despite being routinely employed, the origin of the kappa distribution remains, to this day, unclear. For instance, deviations from the Maxwell-Boltzmann distribution are sometimes regarded as a signature of the nonadditivity of the thermodynamic entropy, although there are alternative frameworks such as superstatistics where such an assumption is not needed. In this work we recover the kappa distribution for particle velocities from the formalism of nonequilibrium steady-states, assuming only a single requirement on the dependence between the kinetic energy of a test particle and that of its immediate environment. Our results go beyond the standard derivation based on superstatistics, as we do not require any assumption about the existence of temperature or its statistical distribution, instead obtaining them from the requirement on kinetic energies. All of this suggests that this family of distributions may be more common than usually assumed, widening its domain of application in particular to the description of plasmas from fusion experiments. Furthermore, we show that a description of kappa-distributed plasma is simpler in terms of features of the superstatistical inverse temperature distribution rather than the traditional parameters κ and the thermal velocity vth.
dc.description.urihttps://journals-aps-org.recursosbiblioteca.unab.cl/pre/pdf/10.1103/PhysRevE.108.065207
dc.identifier.citationPhysical Review E Volume 108, Issue 6 December 2023 Article number 065207
dc.identifier.doi10.1103/PhysRevE.108.065207
dc.identifier.issn2470-0045
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/57440
dc.language.isoen_US
dc.publisherAmerican Physical Society
dc.rights.licenseATRIBUCIÓN 4.0 INTERNACIONAL
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectBoltzmann equation
dc.subjectKinetics
dc.subjectDistributed velocity
dc.subjectHigh density plasmas
dc.subjectKappa distribution
dc.subjectLower density
dc.subjectNon-equilibrium steady state
dc.subjectNon-onequilibrium steady state
dc.subjectParticle correlations
dc.subjectSpace plasmas
dc.subjectSteady-state plasmas
dc.subjectSuperstatistics
dc.subjectarticle
dc.subjectcontrolled study
dc.subjectentropy
dc.subjectkinetics
dc.subjectplasma
dc.subjectstatistical distribution
dc.subjectsteady state
dc.subjecttemperature
dc.subjectthermodynamics
dc.subjectvelocity
dc.subjectKinetic energy
dc.titleKappa distribution from particle correlations in nonequilibrium, steady-state plasmas
dc.typeArtículo
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