Temporal Evolution of Lower Hybrid Waves in the Presence of Ponderomotive Density Fluctuations

Details Temporal Evolution of Lower Hybrid Waves in the Presence of Ponderomotive Density Fluctuations Temporal Evolution of Lower Hybrid Waves in the Presence of Ponderomotive Density Fluctuations

2005-01-10

arxiv.org/abs/physics/0501047v1

Phys. Fluids 24(1), 127-137 (Jan. 1981)

Physics

Plasma Physics

Plain TeX, 24 pages, 11 figures

Scientific paper

10.1063/1.863229

The propagation of lower hybrid waves in the presence of ponderomotive 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 v_tau - \int v_xi dzeta + v_{zeta zeta} + |v|^2 v = 0 where v 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.

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