Overview of Physics Results from the National Spherical Torus Experiment

Research on the National Spherical Torus Experiment, NSTX, targets physics understanding needed for extrapolation to a steady-state ST Fusion Nuclear Science Facility, pilot plant, or DEMO. Present research also examines implications for the coming device upgrade, NSTX-U. A .E scaling appropriate for varied wall conditions exhibits a strong improvement of BT.E with decreased electron collisionality produced by lithium (Li) wall conditioning.