Effect of temperature anisotropy on the dynamics of geodesic acoustic modes

Autor:	J.N. Sama, A. Biancalani, A. Bottino, I. Chavdarovski, D. Del Sarto, A. Ghizzo, T. Hayward-Schneider, Ph. Lauber, B. Rettino, F. Vannini
Rok vydání:	2023
Předmět:	Plasma Physics (physics.plasm-ph) FOS: Physical sciences Condensed Matter Physics Physics - Plasma Physics
Zdroj:	Journal of Plasma Physics
ISSN:	1469-7807 0022-3778
Popis:	In this work, we revisit the linear gyro-kinetic theory of geodesic acoustic modes (GAMs) and derive a general dispersion relation for an arbitrary equilibrium distribution function of ions. A bi-Maxwellian distribution of ions is then used to study the effects of ion temperature anisotropy on GAM frequency and growth rate. We find that ion temperature anisotropy yields sensible modifications to both the GAM frequency and growth rate as both tend to increase with anisotropy and these results are strongly affected by the electron to ion temperature ratio.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b6b44ac208ce5a9c88631bab49f46ffa https://doi.org/10.1017/s0022377823000016 Zobrazit plný text záznamu