Observation of chaotic oscillations in hollow cathode discharges

We report detailed observations on self-sustained oscillations observed by varying the dynamical resistance in a Ne hollow cathode discharge. The periodicity (T) of these oscillations transform into a state with 2T irrespective of ballast resistance (R/sub b/) at larger driving parameter values. For the intermediate values of driving parameter (4.38-5.06 mA), a window appears for R/sub b//spl ges/5 k/spl Omega/. In the window regime the oscillations are chaotic and the behavior is strongly dependent on R/sub b/.<
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