  Laboratory formation of large carbon clusters with m C atoms where m could be
up to few thousand, in carbonaceous plasma, has been studied by using an
especially designed ion source. Carbon is introduced into the glow discharge
plasma by sputtering of the graphite electrode. Soot dominated plasma is
created whose constituents are carbon clusters. It produces and recycles
cluster containing plasma. Regenerative sooting plasma creates the environment
in which the entire spectrum of clusters that contain the linear chains, rings
and fullerenes. Velocity spectra of the extracted clusters have been measured
with an ExB filter. These spectra indicate and identify the mechanisms
operating in the soot.
