Baseball II-T, a new target plasma startup experiment

A brief description is given of modifications and additions to the existing Baseball II experiment. These changes will make it possible to study target plasma buildup in a steady-state magnetic field. This experiment, now called Baseball II-T$sup +$ will use a pellet generator to deliver ammonia pellets into the center of the magnetic mirror field where they will be heated with a 300-J, 50-ns, CO$sub 2$ laser. The plasma created by this method will have a density of approximately 10$sup 13$ cm$sup -3$ and a temperature of about 1 keV. This target plasma will be used for neutral beam injection startup studies with a 50-A, 20-keV neutral beam. Later, the beam power will be increased to study buildup. With ion injection energies of up to 50 keV, it may be possible to achieve etatau as high as 10$sup 12$ cm$sup -3$ s. The new components necessary to achieve these goals are described. (auth)