Kinetic Studies of Crossfield Plasma Instabilities in Weakly Collisional Plasmas

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F14%3A00219513" target="_blank" >RIV/68407700:21230/14:00219513 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.ipfn.ist.utl.pt/ICPP2014/List_of_Abstracts.html" target="_blank" >http://www.ipfn.ist.utl.pt/ICPP2014/List_of_Abstracts.html</a>

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Kinetic Studies of Crossfield Plasma Instabilities in Weakly Collisional Plasmas

Popis výsledku v původním jazyce

Ionospheric plasma instabilities are frequently studied phenomena which can affect ionospheric electrodynamics. In the lower layers of ionosphere, two-stream like instabilities are common, due to a high collision frequency between ions and neutrals and in the analysis, ions are often assumed as stationary, as in for example the Farley-Buneman instability. In the upper layers of the ionospheric E-layer one can find conditions where for both plasma species the collision frequency is lower than the relevant cyclotron frequency, thus both species will drift in the ExB direction. On the basis of the previous numerical results, we have simulated these weakly collisional plasmas using a Particle-In-Cell code, and observed highly nonlinear, unstable regimes. In our study, we have considered two types of collisions for ions: charge exchange and elastic scattering, and found different instability characteristics such as electrostatic potential fluctuations or electrostatic wave spectra for each

Název v anglickém jazyce

Kinetic Studies of Crossfield Plasma Instabilities in Weakly Collisional Plasmas

Popis výsledku anglicky

Ionospheric plasma instabilities are frequently studied phenomena which can affect ionospheric electrodynamics. In the lower layers of ionosphere, two-stream like instabilities are common, due to a high collision frequency between ions and neutrals and in the analysis, ions are often assumed as stationary, as in for example the Farley-Buneman instability. In the upper layers of the ionospheric E-layer one can find conditions where for both plasma species the collision frequency is lower than the relevant cyclotron frequency, thus both species will drift in the ExB direction. On the basis of the previous numerical results, we have simulated these weakly collisional plasmas using a Particle-In-Cell code, and observed highly nonlinear, unstable regimes. In our study, we have considered two types of collisions for ions: charge exchange and elastic scattering, and found different instability characteristics such as electrostatic potential fluctuations or electrostatic wave spectra for each

Druh

O - Ostatní výsledky

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

—

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2014

Kód důvěrnosti údajů

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