Turbulent heating and anomalous k spectrum in the quasilinear evolution of current-driven ion-acoustic instability in a magnetic field

Journal Article · Wed Feb 01 04:00:00 EST 1984 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.864621· OSTI ID:5168178

Ishihara, O; Hirose, A

Time evolution of ion-acoustic instability driven by a current along a magnetic field is studied within the quasilinear framework. Coupled quasilinear equations for the ion and electron distribution functions are solved numerically in a self-consistent manner for a wide range of magnetic field. Efficient electron heating both parallel and perpendicular to the magnetic field is observed. The heating perpendicular to the field is due to the electron cyclotron resonance (anomalous Doppler effect). Ions form a high-energy tail strictly through quasilinear mechanisms, as previously found in one-dimensional analysis. The tail extends in the direction perpendicular to the magnetic field as well as parallel, and is found to be responsible for quasisteady saturation of the turbulence level and also for the anomalous k spectrum dominated by cross-field modes (k/sub perpendicular/ >k/sub parallel/).

• Research Organization: Department of Physics, University of Saskatchewan, Saskatoon, Canada S7N 0W0
• OSTI ID: 5168178
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 27:2; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700107* -- Fusion Energy-- Plasma Research-- Instabilities
CYCLOTRON RESONANCE
DISTRIBUTION FUNCTIONS
ELECTRON CYCLOTRON-RESONANCE
FUNCTIONS
HEATING
INSTABILITY
ION ACOUSTIC WAVES
ION WAVES
MAGNETIC FIELDS
NUMERICAL SOLUTION
PLASMA
PLASMA HEATING
PLASMA INSTABILITY
PLASMA WAVES
RESONANCE
TIME DEPENDENCE
TURBULENCE