Gyrotropic Guiding-Center Fluid Theory for Turbulent Inhomogeneous Magnetized Plasma
AIR FORCE RESEARCH LAB HANSCOM AFB MA SPACE VEHICLES DIRECTORATE
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In this paper, a new fluid theory is given in the guiding-center and gyrotropic approximation which is derivable from the Vlasov-Maxwell equations. The theory includes the effect of wave-particle interactions for the weakly turbulent, weakly inhomogeneous, nonuniformly magnetized plasma, and it is applicable to a variety of space and laboratory plasmas. It is assumed that the turbulence is random and electrostatic, and that the velocity-space Fokker-Planck operator can be used to calculate the correlation functions that describe the wave-particle interactions. Conservation laws are derived that relate the low-order velocity moments of the particle distributions to the turbulence. The theory is based on the work of Hubbard Proc. R. Soc. London, Ser. A 260,114 1961 and Ichimarti and Rosenbluth Phys. Fluids 13, 2778 1970. In the work presented here, the idea is proposed that the fluid equations can be solved 1 by using measurements of the turbulence to specify the electric-field fluctuations and 2 by using measurements of the low-order velocity moments to specify the initial and boundary conditions.
- Fluid Mechanics
- Plasma Physics and Magnetohydrodynamics