Nonlinear evolution of lower hybrid waves

Journal Article · Tue May 01 04:00:00 EDT 1979 · Phys. Fluids; (United States)

DOI:https://doi.org/10.1063/1.862688· OSTI ID:6306505

Karney, C F.F.; Sen, A; Chu, F Y.F.

The two-dimensional steady-state distribution of lower hybrid waves is governed by the complex modified Korteweg--deVries equation, v/sub tau/+v/sub xixixi/+(vertical-barvvertical-bar/sup 2/v)/sub xi/=0, where v is proportional to the electric field and xi and tau are two spatial coordinates. The equation is studied numerically. Two types of solitary waves can arise; one is a constant phase pulse, whereas the other is an envelope solitary wave. These solitary waves are not solitons. The occurrence of the constant phase pulses points to the possibility of internal reflections due to scattering off ponderomotive density fluctuations. This necessitates solving the equation as a boundary value problem. With typical fields for lower hybrid heating of a tokamak, it is found that large reflections can occur close to the edge of the plasma.

• Research Organization: Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08544
• OSTI ID: 6306505
• Journal Information: Phys. Fluids; (United States), Journal Name: Phys. Fluids; (United States) Vol. 22:5; ISSN PFLDA
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101 -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
700108* -- Fusion Energy-- Plasma Research-- Wave Phenomena
BOUNDARY CONDITIONS
CLOSED PLASMA DEVICES
ELECTROMAGNETIC FIELDS
HEATING
NONLINEAR PROBLEMS
NUMERICAL SOLUTION
PLASMA HEATING
PLASMA WAVES
PULSES
QUASI PARTICLES
SOLITONS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
TWO-DIMENSIONAL CALCULATIONS