Experimental phase synchronization of chaos in a plasma discharge is studie
d using a phase variable lift technique (i.e., phase points separated by 2
pi are not considered as the same). Real-time observation of synchronized a
nd unsynchronized states is made possible through a real-time sampling proc
edure. Parameter space regions of synchronization and unsynchronization are
identified, and a set of equations is suggested to model the real plasma c
ircuit.