Chaotic current oscillations with broadband spectrum in a glow discharge plasma

We have observed self-generated chaotic current oscillations in the plasma of a helium glow discharge. The S(f) power density spectrum of the current signal exhibited characteristic dependence over a wide range of frequencies with an exponent of α = 4.3. The correlation dimension of the system determined from the correlation sums of the current signal was found to be D2 6.3. This value of D2 is in good agreement with the theoretically predicted dimension, corresponding to fully developed turbulence.