Dj. Economou et al., Plasmoid formation and multiple steady states in a low pressure, inductively coupled electronegative plasma, IEEE PLAS S, 27(1), 1999, pp. 60-61
Hysteresis and multiple steady states have been observed in a low pressure
inductively coupled plasma in chlorine gas. A bowl-shaped bright structure
with sharply delineated edges (plasmoid) was found to form under the planar
coil, A different plasma state with rather diffuse emission of lower inten
sity was also observed under the same operating conditions.