A new type of low-energy ion accelerator has been developed. It includ
es an eight-storied Disktron generator, newly developed accelerating t
ubes which hold up to 4 MV/m, both single and tandem acceleration capa
bility, and a compound negative ion source. The Disktron generates 3.2
MV with a dummy load and 2.2 MV with ion beams, and has a voltage sta
bility better than 10(-3) at around 1 MV with a corona feedback stabil
izer or a generating voltmeter feedback stabilizer only. The highly st
abilized voltage of the Disktron has particularly been allowed to form
an ion microbeam of about 1-mum diameter.