ICCD microscopic imaging of a single micro-discharge in surface coplanar DBD geometry: determination of the luminous diameter of N-2 and Ar streamers

0360381 - ÚFP 2012 RIV GB eng J - Článek v odborném periodiku
Šimek, Milan - Ambrico, P. F. - Prukner, Václav
ICCD microscopic imaging of a single micro-discharge in surface coplanar DBD geometry: determination of the luminous diameter of N-2 and Ar streamers.
Plasma Sources Science & Technology. Roč. 20, č. 2 (2011), 025010-025010. ISSN 0963-0252. E-ISSN 1361-6595.
[European Sectional Conference on Atomic and Molecular Physics of Ionized Gases (ESCAMPIGXX)/20th./. Novi Sad, SERBIA, 13.07.2010-17.07.2010]
Grant CEP: GA ČR GA202/08/1106
Výzkumný záměr: CEZ:AV0Z20430508
Klíčová slova: surface barier discharge * streamer * imaging
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 2.521, rok: 2011
http://iopscience.iop.org/0963-0252/20/2/025010/pdf/0963-0252_20_2_025010.pdf

Time-resolved images of a single-surface dielectric barrier micro-discharge were obtained by employing ICCD microscopy with high spatial and time resolution. The micro-discharge was repetitively produced using amplitude-modulated ac high voltage waveforms applied to the coplanar electrode geometry in a reactor, fed either with high-purity Ar or N2 at atmospheric pressure. The driving high-voltage amplitude was set to initiate just one single micro-discharge per one ac half-cycle. Images recorded within the two successive ac cycles provided evidence that the track left by the first micro-discharge influenced the propagation trajectory of consecutive streamers. Images of individual micro-discharges allowed evaluation of the luminous streamer channel diameter and its evolution along the streamer's propagation trajectory. Minimum luminous streamer channel diameters of 30 ± 6 µm and 50 ± 10 µm were fixed in Ar and N2, respectively.
Trvalý link: http://hdl.handle.net/11104/0197950