LBL/LLL positive-ion-based neutral beam development program status

The LBL/LLL neutral beam development program consists of two parts: a near-term (through approximately 1985) program based on the acceleration and neutralization of positive ions, and a longer-term ''efficient-beam'' program. The emphasis in the present positive ion-based work is on 80- to 120- kV, 65- to 80-A, 0.5-S modules. We will go toward long-pulse (dc), and perhaps somewhat higher energy, operation during the next few years. For efficient injection above 150- to 200- keV (D0), the present LBL/LLL plan is to develop a negative-ion approach suitable for 200- to 400 kV injectors on confinement experiments in the 1985 to 1990 period, although the timescale might be accelerated, if required. The negative-ion program is described elsewhere in the proceedings of this workshop