Negative Ion Source and Beam Development at BNL

Neutral beam injector based on H
^-
ions for Tokamak fusion reactors is gradually evolving from the accumulated research results at BNL. Progress is reported on both Penning and magnetron surface plasma ion sources for direct extraction of negative ions. Schemes for transporting and accelerating of the ion beam are also described. Test results of the gas jets for H
^-
→ H° conversion are also included. The next generation of a high energy neutral injector test stand to be completed in the coming months is also presented.