  In the present paper we introduce a new accelerator concept for ions. The
accelerator is nano-structured and can consist of a range of materials. It is
capable of generating large ionic currents at moderate ion energies. The
nano-structures can be tailored towards the accelerator thus being capable of
driving ion beams with very high efficiency. The accelerator is powered by
laser arrays consisting of many repetitive and efficient lasers in the $100 \,
\text{J}$ range with ultra-short intense laser pulses. Combining
nano-structures and the proposed ultra-short pulse lasers can lead to new
levels of spatio-temporal control and energy efficiency for fusion
applications.
