Assessment of possible implications of a neutral beam configuration for CIT

The present plans for the Compact Ignition Tokamak (CIT) call for the auxiliary heating to be done by RF techniques. However, R.J. Goldston (1988) has proposed that an alternative scenario might involve running TFTR (Tokamak Fusion Test Reactor)-type supershot plasmas with peaked density profiles. This would require central fueling by deuterium and tritium beams. The authors have performed a conceptual study of a system to inject negative-ion-based 300-keV beams of deuterium (D) and tritium (T) using the available port geometry. The authors report on the resulting conceptual design, the tritium usage during operation, and the implications for the test cell configuration