Temporal evolution of lower hybrid waves in the presence of ponderomotive density fluctuations

Technical Report · Sun Jun 01 04:00:00 EDT 1980

DOI:https://doi.org/10.2172/5236823· OSTI ID:5236823

Karney, C F.F.

The propagation of lower hybrid waves in the presence of ponderomotive density density fluctuations is considered. The problem is treated in two dimensions and, in order to be able to correctly impose the boundary conditions, the waves are allowed to evolve in time. The fields are described by i upsilon/sub tau/ - ..integral.. upsilon/sub xi/d/sub zeta/ + upsilon/sub zeta zeta/ + upsilon//sup 2/ upsilon = 0 where upsilon is proportional to the electric field, tau to time, and zeta and xi measure distances across and along the lower hybrid ray. The behavior of the waves is investigated numerically. If the amplitude of the waves is large enough, the spectrum of the waves broadens and their parallel wavelength becomes shorter. The assumptions made in the formulation preclude the application of these results to the lower hybrid heating experiment on Alcator-A. Nevertheless, there are indications that the physics embodied in this problem are responsible for some of the results of that experiment.

• Research Organization: Princeton Univ., NJ (USA). Plasma Physics Lab.
• DOE Contract Number: AM02-76CH03073
• OSTI ID: 5236823
• Report Number(s): PPPL-1672
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700101* -- Fusion Energy-- Plasma Research-- Confinement
Heating
& Production
ALCATOR DEVICE
CLOSED PLASMA DEVICES
HEATING
HIGH-FREQUENCY HEATING
HYBRID RESONANCE
PLASMA DENSITY
PLASMA HEATING
PLASMA WAVES
RESONANCE
THERMONUCLEAR DEVICES
TIME DEPENDENCE
TOKAMAK DEVICES
TWO-DIMENSIONAL CALCULATIONS