  A description of an edge-biasing experiment conducted on the SPECTOR
(Spherical Compact Toroid) plasma injector is presented, along with initial
results. The insertion of a disc-shaped molybdenum electrode (probe), biased at
up to +100V, into the edge of the CT (Compact Torus), resulted in up to 1kA
radial current being drawn. Core electron temperature, as measured with a
Thomson-scattering diagnostic, was found to increase by a factor of up to 2.4
in the optimal configuration tested. H_alpha intensity was observed to
decrease, and CT lifetimes increased by a factor of up to 2.3. A significant
reduction in electron density was observed; this is thought to be due to the
effect of a transport barrier impeding CT fueling, where, as verified by MHD
simulation, the fueling source is neutral gas that remains concentrated around
the gas valves after CT formation.
