Simulation study of surface and body waves in a magnetized bounded plasma
Thesis/Dissertation
·
OSTI ID:5174784
The problem of wave propagation in a magnetized plasma slab was studied by particle simulation of plasma. In the model, a warm homogeneous plasma slab is bounded by vacuum on two sides. Using a 2-D electrostatic particle code, the author simulated two different cases. For the sharp boundary case with wave propagation perpendicular to the external field, two branches of surface waves are found to exist. A theoretical analysis showed that the discreteness of the modes is due to the quantization condition imposed by the boundary. A generalized surface mode damped in time appears below the second cyclotron harmonic and it is found that by specifying the complex frequency in the Bernstein wave dispersion relation, the wavelength and attenuation in the direction normal to the slab is predicted accurately. Short time-scale phase mixing, damping, and recurrence phenomena of Bernstein body modes are also observed. Oblique propagation of the waves are studied by the magnetic field perpendicular to the plasma-vacuum interface. For the free-boundary model, the confinement is provided by fixed ion plus the magnetic field. Wave propagation was studied with and without an external magnetic field applied parallel to the slab boundaries.
- Research Organization:
- California Univ., Los Angeles, CA (USA)
- OSTI ID:
- 5174784
- Country of Publication:
- United States
- Language:
- English
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