Numerical model for radial transport in the ELMO Bumpy Torus
Numerical model for radial transport in the ELMO Bumpy Torus
Neutral and charged particle densities and temperatures are calculated as functions of radius for the toroidal plasma in the ELMO Bumpy Torus (EBT) experiment. Energy dependent ionization and charge-exchange rates, ambipolar diffusion, and self-consistent radial electric field profiles are included. Variation in magnetic field due to finite plasma pressure, effects of energetic electron rings, and transport due to drift waves and magnetic field errors are neglected. Diffusion is assumed to be neoclassical with enhanced losses at low collisionalities. The model reproduces many of the observed features of EBT operation in the quiescent toroidal (T) mode. The self-consistently calculated electric field is everywhere positive (not as in experiments) unless enhanced electron collisionality is included. Solutions for advanced EBT's are obtained and confinement parameters predicted.
- Oak Ridge National Laboratory United States
- Princeton Plasma Physics Laboratory United States
- College of New Jersey United States
- University of North Texas System United States
Atoms, Plasma Density, Mathematical Models, Electric Fields, Distribution, Self-Consistent Field, Diffusion, Ion Density, Charge Exchange, Elmo Bumpy Torus, Radiation Transport, Electron Density, Elmo Devices, 70 Plasma Physics And Fusion Technology, Thermonuclear Devices 700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987), Magnetic Mirrors, Charged-Particle Transport, Open Plasma Devices, Ambipolar Diffusion, Transport Theory
Atoms, Plasma Density, Mathematical Models, Electric Fields, Distribution, Self-Consistent Field, Diffusion, Ion Density, Charge Exchange, Elmo Bumpy Torus, Radiation Transport, Electron Density, Elmo Devices, 70 Plasma Physics And Fusion Technology, Thermonuclear Devices 700105* -- Fusion Energy-- Plasma Research-- Plasma Kinetics-Theoretical-- (-1987), Magnetic Mirrors, Charged-Particle Transport, Open Plasma Devices, Ambipolar Diffusion, Transport Theory
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