Lawrence Berkeley National Laboratory

1-D Lasnex calculations show efficient (15 to 20percent) hydro-coupling of heavy ion beams to direct drive targets without hohlraums at less than 1 MJ drive energy. Beam symmetry studies show that 60 beams may suffice with rotated beam spots on the ablator. NIF scale capsules with low aspect ratio A < 2 for robust RT stability show 1-D gains ~; 50 at drive energies of 350 to 450 kJ. Application to small heavy ion fusion test reactors with ~; 10 MWe, and to small fission fusion hybrids @ ~; 30 MWe net power scale are considered.