Ion Heating and Flow Driven by an Instability Found in Plasma Couette Flow.
Phys Rev Lett
; 126(18): 185002, 2021 May 07.
Article
de En
| MEDLINE
| ID: mdl-34018793
ABSTRACT
We present the first observation of instability in weakly magnetized, pressure dominated plasma Couette flow firmly in the Hall regime. Strong Hall currents couple to a low frequency electromagnetic mode that is driven by high-ß (>1) pressure profiles. Spectroscopic measurements show heating (factor of 3) of the cold, unmagnetized ions via a resonant Landau damping process. A linear theory of this instability is derived that predicts positive growth rates at finite ß and shows the stabilizing effect of very large ß, in line with observations.
Texte intégral:
1
Collection:
01-internacional
Base de données:
MEDLINE
Type d'étude:
Prognostic_studies
Langue:
En
Journal:
Phys Rev Lett
Année:
2021
Type de document:
Article
Pays d'affiliation:
États-Unis d'Amérique