Effect of kinetic anisotropies on the beta parameter in collisionless magnetized non-ideal plasma fluids

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47813059%3A19630%2F25%3AA0000412" target="_blank" >RIV/47813059:19630/25:A0000412 - isvavai.cz</a>

Výsledek na webu

<a href="https://pubs.aip.org/aip/pof/article-abstract/37/3/037109/3338699/Effect-of-kinetic-anisotropies-on-the-beta?redirectedFrom=fulltext" target="_blank" >https://pubs.aip.org/aip/pof/article-abstract/37/3/037109/3338699/Effect-of-kinetic-anisotropies-on-the-beta?redirectedFrom=fulltext</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0257673" target="_blank" >10.1063/5.0257673</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of kinetic anisotropies on the beta parameter in collisionless magnetized non-ideal plasma fluids

Popis výsledku v původním jazyce

It is demonstrated that collisionless magnetized plasma fluids at equilibrium characterized by the occurrence of phase-space kinetic anisotropies exhibit a lower beta parameter with respect to corresponding isotropic configurations. The theoretical framework is provided by statistical kinetic formulation of plasma physics based on the Vlasov equation in both relativistic and non-relativistic regimes. The proof relies on the analytical construction of non-isotropic Gaussian-like kinetic distribution functions (KDFs) that are consistent with microscopic single-particle exact or adiabatic conservation laws. These KDFs generate corresponding non-ideal magnetized plasma fluids characterized by non-isotropic pressure tensors. A depletion of the magnitude of directional plasma pressure components compared to the thermal isotropic scalar pressure is shown to occur, that is induced by phase-space anisotropies. It is pointed out that this physical principle enhancing low-beta states can represent a mechanism contributing the self-confinement of magnetized plasmas at equilibrium. Relevant applications concern high-energy astrophysical scenarios characterized by intense background magnetic fields, with particular reference to asymptotically steady states of collisionless plasmas forming non-ideal fluids in toroidal structures or relativistic jets.

Název v anglickém jazyce

Effect of kinetic anisotropies on the beta parameter in collisionless magnetized non-ideal plasma fluids

Popis výsledku anglicky

It is demonstrated that collisionless magnetized plasma fluids at equilibrium characterized by the occurrence of phase-space kinetic anisotropies exhibit a lower beta parameter with respect to corresponding isotropic configurations. The theoretical framework is provided by statistical kinetic formulation of plasma physics based on the Vlasov equation in both relativistic and non-relativistic regimes. The proof relies on the analytical construction of non-isotropic Gaussian-like kinetic distribution functions (KDFs) that are consistent with microscopic single-particle exact or adiabatic conservation laws. These KDFs generate corresponding non-ideal magnetized plasma fluids characterized by non-isotropic pressure tensors. A depletion of the magnitude of directional plasma pressure components compared to the thermal isotropic scalar pressure is shown to occur, that is induced by phase-space anisotropies. It is pointed out that this physical principle enhancing low-beta states can represent a mechanism contributing the self-confinement of magnetized plasmas at equilibrium. Relevant applications concern high-energy astrophysical scenarios characterized by intense background magnetic fields, with particular reference to asymptotically steady states of collisionless plasmas forming non-ideal fluids in toroidal structures or relativistic jets.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

PHYSICS OF FLUIDS

ISSN

1070-6631

e-ISSN

—

Svazek periodika

37

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

„037109-1“-„037109-17“

Kód UT WoS článku

001439935600025

EID výsledku v databázi Scopus

2-s2.0-86000497300