Long range temporal correlation in the chaotic oscillations of a dc glow discharge plasma

Journal Article · Wed Aug 15 04:00:00 EDT 2012 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4747533· OSTI ID:22086023

Lahiri, S ^[1]; Roychowdhury, D ^[2]; Sekar Iyengar, A N ^[3]

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1. Dinabandhu Mahavidyalaya, Bongaon, North 24 Parganas, Kolkata 743235 (India)
2. Techno India, EM4/1 Sector V, Salt Lake, Kolkata 700091 (India)
3. Plasma Physics Division, Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064 (India)

Long range temporal correlations in the fluctuations of the plasma floating potentials (measured using a Langmuir probe) are investigated in a dc glow discharge plasma. Keeping the neutral pressure constant, the discharge voltage was varied and at the formation of the plasma, quasi periodic oscillations were excited and on further increase of the discharge voltage they became chaotic (irregular) beyond a threshold voltage. We compared the Lyapunov exponent with the Hurst exponent obtained from R/S statistics which showed an opposite behaviour at the transition point. These results are perhaps new since we have not come across such comparative analysis for chaotic oscillations in a glow discharge plasma before.

• OSTI ID: 22086023
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 8 Vol. 19; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRIC POTENTIAL
GLOW DISCHARGES
LANGMUIR PROBE
LYAPUNOV METHOD
OSCILLATIONS
PLASMA
PLASMA WAVES
POTENTIALS
STATISTICS