A novel particle beam target comprising: a rotating target disc mounted on a
retainer
and thermally coupled to a first array of spaced-apart parallel plate fins that
extend radially inwardly from the retainer and mesh without physical contact with
a second array of spaced-apart parallel plate fins that extend radially outwardly
from and are thermally coupled to a cooling mechanism capable of removing heat
from said second array of spaced-apart fins and located within the first array
of spaced-apart parallel fins. Radiant thermal exchange between the two arrays
of parallel plate fins provides removal of heat from the rotating disc. A method
of cooling the rotating target is also described.
