Experimental study of a negative corona in atmospheric-pressure argon

Dandaron, G. N. B.; Балданов, Б. Б.

doi:10.1134/s1063780x07030099

Cited by 11 publications

(2 citation statements)

References 8 publications

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“…It was also believed that Trichel pulses could appear exclusively in electronegative gases [16,17]. Recently, however, similar pulses were observed in pure nitrogen and argon [18][19][20][21]. Akishev et al [18,19] suggested that the existence of the negative slope on the I -V curve of the cathode sheath could be responsible for the onset of current pulses.…”

Section: Introductionmentioning

confidence: 93%

Negative corona in silane–argon–hydrogen mixtures at low pressures

Abolmasov

Kroely²,

Cabarrocas³

2008

J. Phys. D: Appl. Phys.

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Current pulses have been measured in negative corona discharges in argon–hydrogen and silane–argon–hydrogen mixtures near the Paschen minimum. It was found that the current pulses appear only on the right branch of the Paschen curve and have shapes similar to those of subnormal oscillations in dc discharges between parallel–plane electrodes. The effects of gas temperature and negative ions on the current pulse shape and size are examined. It appears that a small admixture of silane into an argon–hydrogen discharge results in a more pronounced ion–ion phase and doubles the pulse repetition frequency, while an increase in gas temperature acts in exactly the opposite way. The implications of these results on theories of current pulse formation are discussed.

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Section: Introductionmentioning

confidence: 93%

Negative corona in silane–argon–hydrogen mixtures at low pressures

Abolmasov

Kroely²,

Cabarrocas³

2008

J. Phys. D: Appl. Phys.

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“…Note that current pulses sometimes observed in corona discharges in electropositive gases (nitrogen, argon, and others) [51,52] cannot be considered Trichel pulses. These pulses have a longer duration and are formed due to the voltage drop across the gap at high limiting resistances.…”

Section: Corona Discharge Precursors (Dark Discharge Mode-ddm)mentioning

confidence: 99%

Key Modes of Ignition and Maintenance of Corona Discharge in Air

et al. 2023

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Theoretical and experimental studies of various modes of corona discharge operation in atmospheric pressure air are presented in this short review. The original results of modeling negative corona discharges are presented, taking into account the non-stationary plasma-chemical kinetics of charged particles in air plasma. The space–time evolution of the discharge in needle-to-plane geometry is investigated and analyzed. Several stages of discharge development are revealed from the moment of initiation of a low-negative current corona to the quasi-stationary mode of a glow discharge. Experimental data of the authors are presented. Modern technology and diagnostic equipment with a wide variation of the main parameters (the shape and polarity of the applied voltage, the type of gap, etc.) was used. The measurement of the optical characteristics of the plasma glow was carried out with high spatial resolution. Corona discharge current pulse profiles in the air at atmospheric pressure have been recorded with subnanosecond time resolution. With a positive polarity of the pin electrode and high voltage, a transition from a spherical streamer initiating a corona discharge to a cylindrical streamer is shown. The author’s results are rigorously evaluated through a critical comparison with findings from other research groups.

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