Characterization of a dielectric barrier discharge operating in an open reactor with flowing helium

Gagik Nersisyan, William Graham

Research output: Contribution to journalArticlepeer-review

165 Citations (Scopus)


A dielectric barrier discharge (DBD) generated by flowing helium between the parallel-plate electrodes of an open air reactor has been characterized using time resolved optical and electrical measurements. A sinusoidal voltage of up to 5 kV (peak to peak) of frequencies from 3 to 50 kHz has been applied to the discharge electrodes. The helium flow rate is varied up to 10 litre min(-1). The adjustment of flow rate allows the creation of uniform DBDs with optimized input power equal to 120 +/- 10 mW cm(-3). At flow rates from 4 to 6 litre min(-1) a uniform DBD is obtained. The maxima in the line intensities of N-2(+) and helium at 391.4 nm and 706.5 nm, respectively, 2 under those conditions indicate the importance of helium metastables and He-2(+) in sustaining such a discharge. The power efficiency and discharge 2 current show maxima when the DBD In He/air is uniform. The gas temperature during the discharge has been measured as 360 +/- 20 K.
Original languageEnglish
Pages (from-to)582-587
Number of pages6
JournalPlasma Sources Science and Technology
Issue number4
Publication statusPublished - Sept 2004

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Condensed Matter Physics


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