PLASMA DYNAMICS XIV. PLASMAS AND CONTROLLED NUCLEAR FUSION A. Waves and Radiation Academic and Research Staff

The major goal of this group is to generate a basic understanding of various types of oscillations and waves in ionized gases that are relevant to problems in thermonu-clear fusion and space research. 1. Investigations of electromagnetic radiation emitted spontaneously by the plasma, because of thermal and nonthermal fluctuations of the free charges. At present, particular attention is being paid to emission generated as a result of many-body (collective) interactions between the charges at frequencies near the electron plasma frequency. 2. Studies of the dispersion characteristics of small-amplitude stable and unstable waves. We are now looking at the properties of ion sound waves in a facility that gen-erates a collisionless plasma. 3. Investigation of nonlinear plasma phenomena is one of our major goals for the next few years. In this connection, we are particularly interested in the prop-erties of large-amplitude waves, particle trapping, nonlinear Landau damping, para-metric coupling of three or more waves, coupling of waves with particles, and turbulence. 4. Studies of fluctuation, particle losses, and turbulence in magnetic multi-pole geometries. For this purpose, we are constructing a steady-state linear quadrupole (SLIM-1). This is operated in the Francis Bitter National Magne