During the last 10 years, we have developed a very bright gas ion source ba
sed on the principle of field ionization. By producing a tiny protrusion, a
'supertip', on top of a broad regular emitter ion beams with brightnesses
of up to 1 TA/cm(2) sr have been realized for a variety of gaseous elements
, including H-2(+), He+, Ne+ and O-2(+). The feasibility of a nuclear nanop
robe will be discussed. (C) 1999 Published by Elsevier Science B.V. All rig
hts reserved.