Nonlinear coupling and propagation of lower hybrid waves

Conference · Sun Feb 01 04:00:00 EST 1981

OSTI ID:6053320

Theilhaber, K S; Bers, A

The nonlinear coupling and propagation of lower hybrid waves excited by a waveguide array are examined numerically in a model of an inhomogeneous Tokamak plasma. The nonlinearity is the ponderomotive force which results in self-modulation of the lower hybrid waves. We evolve self-consistently the fields in time to a steady-state. Both travelling and standing wave excitations are considered. The dependence of reflectivity on the nonlinearity is studied and found to exhibit qualitative behavior seen in experiments. The nonlinearity also produces density holes in front of the waveguides, and the accompanying fields are strongly focused. In Fourier space, the parallel wave spectrum is broadened and upshifted. In the travelling wave case the spectrum is broadened but remains unindirectional, that is negative k/sub z/ are not generated.

• Research Organization: Massachusetts Inst. of Tech., Cambridge (USA). Plasma Fusion Center
• DOE Contract Number: AC02-78ET51013
• OSTI ID: 6053320
• Report Number(s): DOE/ET/51013-7; PFC/RR-81-5; CONF-810214-7; ON: DE81029876
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
CLOSED PLASMA DEVICES
COUPLING
HEATING
HIGH-FREQUENCY HEATING
HYBRID RESONANCE
INHOMOGENEOUS PLASMA
NONLINEAR PROBLEMS
PLASMA
PLASMA HEATING
RESONANCE
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
WAVE PROPAGATION