Cluster observations of trapped ions interacting with magnetosheath mirror modes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F11%3A00360932" target="_blank" >RIV/68378289:_____/11:00360932 - isvavai.cz</a>

Výsledek na webu

<a href="http://www.ann-geophys.net/29/1049/2011/angeo-29-1049-2011.pdf" target="_blank" >http://www.ann-geophys.net/29/1049/2011/angeo-29-1049-2011.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.5194/angeo-29-1049-2011" target="_blank" >10.5194/angeo-29-1049-2011</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Cluster observations of trapped ions interacting with magnetosheath mirror modes

Popis výsledku v původním jazyce

Mirror modes are among the most intense low frequency plasma wave phenomena observed in the magnetosheaths of magnetized planets. They appear as large amplitude non-propagating fluctuations in the magnetic field magnitude and plasma density. These structures are widely accepted to represent a non-linear stage of the mirror instability, dominant in plasmas with large ion beta and a significant ion temperature anisotropy. It has long been recognized that the mirror instability both in the linear and non-linear stage is a kinetic process and that the behavior of resonant particles at small parallel velocities is crucial for its development and saturation. In this work we used data from the Cluster spacecraft to perform the first detailed experimental study of ion velocity distribution associated with mirror mode oscillations. We show a conclusive evidence for the predicted cooling of resonant ions at small parallel velocities and heating of trapped ions at intermediate pitch angles.

Název v anglickém jazyce

Cluster observations of trapped ions interacting with magnetosheath mirror modes

Popis výsledku anglicky

Mirror modes are among the most intense low frequency plasma wave phenomena observed in the magnetosheaths of magnetized planets. They appear as large amplitude non-propagating fluctuations in the magnetic field magnitude and plasma density. These structures are widely accepted to represent a non-linear stage of the mirror instability, dominant in plasmas with large ion beta and a significant ion temperature anisotropy. It has long been recognized that the mirror instability both in the linear and non-linear stage is a kinetic process and that the behavior of resonant particles at small parallel velocities is crucial for its development and saturation. In this work we used data from the Cluster spacecraft to perform the first detailed experimental study of ion velocity distribution associated with mirror mode oscillations. We show a conclusive evidence for the predicted cooling of resonant ions at small parallel velocities and heating of trapped ions at intermediate pitch angles.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BL - Fyzika plasmatu a výboje v plynech

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2011

Kód důvěrnosti údajů

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

Název periodika

Annales Geophysicae

ISSN

0992-7689

e-ISSN

—

Svazek periodika

29

Číslo periodika v rámci svazku

—

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

12

Strana od-do

1049-1060

Kód UT WoS článku

000291945800009

EID výsledku v databázi Scopus

—