Weak double layers in ion-acoustic turbulence

Journal Article · Mon Apr 01 04:00:00 EST 1985 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.865028· OSTI ID:5989254

Barnes, C; Hudson, M K; Lotko, W

The evolution of weak double layers in ion-acoustic turbulence in one and two-dimensional particle simulations is examined. Weak double layers (ephi< or approx. =T/sub e/) evolve in simulations when a subthermal electron drift is imposed on a long or nonperiodic system with T/sub e//T/sub i/>>1. Their growth rate increases with the electron drift, and they decay because of ion trapping. They do not form in weakly magnetized or unmagnetized two-dimensional (2-D) systems unless a nonuniformity is introduced in the initial or boundary conditions. When the plasma is strongly magnetized (..omega../sub c/e>..omega../sub p/e), they emerge from 2-D ion-acoustic turbulence as coherent structures localized transversely to the magnetic field.

• Research Organization: Applied Theoretical Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 5989254
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 28:4; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987)
700108 -- Fusion Energy-- Plasma Research-- Wave Phenomena
CHARGED PARTICLES
ELECTRIC POTENTIAL
ELECTRON DRIFT
ION ACOUSTIC WAVES
ION WAVES
IONS
ONE-DIMENSIONAL CALCULATIONS
PLASMA
PLASMA WAVES
SIMULATION
TURBULENCE
TWO-DIMENSIONAL CALCULATIONS