Multi-scale dynamics in externally excited glow discharge plasma

Utpal Deka, Ashok Rao, Md Nurujjaman

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Time series analysis of fluctuations excited due to external perturbation in a dc glow discharge plasma system is presented. Analysis shows that the observed data is non-Gaussian in nature and has purely deterministic behavior. The oscillations are bi-periodic in nature without any occurrence of chaos with increasing discharge voltage. Two dominant frequencies 100 KHz and 200 KHz with background noise are observed. The Hurst coefficient is also evaluated for the data sets and is seen to be greater than 0.5 for all the cases. The observed bi-periodic oscillations have their origin due to some nonlinearities in the system. The observed frequencies are found to be due to ionization instability and ion acoustic instability.

Original languageEnglish
Article number125602
JournalPhysica Scripta
Issue number12
Publication statusPublished - 06-11-2015

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Mathematical Physics
  • Condensed Matter Physics


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