Electrical and optical study of DC driven repetitively pulsed transient spark discharge in atmospheric air
Janda M., Machala Z., Martišovitš V.
49th AIAA Aerospace Sciences Meeting, Orlando, Florida, January 4-7, AIAA 2011-906 (2011)
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Abstract: We present a study of electrical properties and optical emission of transient spark (TS) - streamer-to-spark transition discharge in atmospheric pressure air. TS was succesfully applied for flue gas cleaning or bio-decontamination and has a potential in plasma shielding, combustion, and flow control applications. Despite
the DC applied voltage, TS has a pulsed character with short (∼10–100 ns) high current (>1 A) pulses, with repetitive frequencies 1–20 kHz. Estimation of the temporal evolution of electron density n using discharge diameter measured by time-resolved iCCD imaging, supported by preliminary spectroscopic ne measurements
from Hα broadening, show that n ≈ 1016-1017 cm-3 at maximum and ∼1011 cm-3 in average are reached using relatively low power delivered
to the plasma (0.2–3 W). Thanks to the high repetition frequency,
n between two current pulses does not fall below a critical value and therefore plasma exists during the whole
time. A detailed analysis of the TS control by electrical circuit parameters is presented. With appropriate
circuit components, the current pulse tail (>1 mA) can be extended and
the electron density can be held above ∼1013 cm-3 for several tens of μs.
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Citations: | 1.) | T. Verreycken: Spectroscopic investigation of OH dynamics in transient atmospheric pressure plasmas; PhD thesis, Technische Universiteit Eindhoven, Netherlands, 2013
(2013)
------------- | | 2.) | R.M. van der Horst, T. Verreycken, E.M. van Veldhuizen, P.J. Bruggeman: Time-resolved optical emission spectroscopy of nanosecond pulsed discharges in atmospheric-pressure N2 and N2/H2O mixtures, J. Phys. D: Appl. Phys. 45, 345201 (2012), citation 9, WoS
(2012)
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