Some properties of Trichel pulses with AC voltage

Goliński, J.; Grudzinski, J.

doi:10.1088/0022-3727/19/8/017

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…2), where the phenomena were studied in air. Also, it is noteworthy that Golinski and Grudzinski (1986), in line with other authors (see Loeb 1965, pp. 305-6), have found a sufficiently intense Malter emission of electrons from cathode surface imperfections, such as oxide layers or deposited particles, to allow a Thichel pulse to occur.…”

Section: (C) Physical Mechanism For Spikes On the Trichel Pulse Trailing Partsupporting

confidence: 86%

“…Analogies between the onset of negative corona Trichel pulses and positive corona streamers have been found also by Poli (1982), and by Gallimberti and Marchesi (1982) who have argued that: 'The threshold voltage for both positive and negative (corona) polarities can be defined as the minimum voltage allowing an avalanche, growing in the most favourable conditions, to reach a critical size that can ensure self-sustained streamer propagation.' Finally, we note the paper by Golinski and Grudzinski (1986) where a statistical analysis of the charge and the light emission of Trichel pulses led the authors to hypothesise that: 'The development of the preliminary avalanche ionisation is stopped owing to the feedback effect of the field due to the negative space charge produced by this ionisation. At the same time, conditions arise permitting the development of an inverse discharge directed from the positive space charge to the point and supported by photo-ionisation.…”

Section: (B) Concept Of Cathode-directed Streamer Associated With Trichel Pulse Risementioning

confidence: 95%

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Negative Corona Current Pulses and Cathode Sheath Instabilities in a Short Point-Plane Gap in CO2

Černák¹,

Hosokawa²

1992

Aust. J. Phys.

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Waveforms ofthe first negative corona current pulses have been measured in C02 and C02+SF6 mixtures as a function of applied voltage and gas pressure in the range 6�67-66�7 kPa. A complex form of the pulses with a step on the pulse leading edge and a current hump on the pulse trailing part has been found at gas pressures below 40 kPa. Changing the cathode surface material from copper to copper iodide, which has an exceptionally high photoelectric yield, resulted in at least a twofold increase in height of the step on the pulse leading edge, but had little effect on the main current rise to the pulse peak. The use of unconditioned cathodes resulted in the appearance of peculiar current spikes on the pulse tail, which are tentatively attributed to positive-streamer-like instabilities of the cathode sheath. The implications of these results for theories of Trichel pulse formation are discussed, and a physical picture of the phenomenon based on the presumed existence of a cathode-directed streamer associated with the steep pulse rise is outlined.

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Section: (C) Physical Mechanism For Spikes On the Trichel Pulse Trailing Partsupporting

confidence: 86%

Section: (B) Concept Of Cathode-directed Streamer Associated With Trichel Pulse Risementioning

confidence: 95%

Negative Corona Current Pulses and Cathode Sheath Instabilities in a Short Point-Plane Gap in CO2

Černák¹,

Hosokawa²

1992

Aust. J. Phys.

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“…It is an interesting and well-documented fact that the regular TPs can be generated only using cathodes with some surface imperfection as oxide spots or dust particles providing a random field (Malter) electron emission [143,208,209].…”

Section: Negative Corona Tpsmentioning

confidence: 99%

Streamer breakdown: cathode spot formation, Trichel pulses and cathode-sheath instabilities

Černák

Hoder

Bonaventura

2020

Plasma Sources Sci. Technol.

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The review provides an up-to-date overview and discussion of phenomena related to positive streamer breakdowns in short uniform and non-uniform field (corona) gaps. The terminology used to specify different types of streamer phenomena is critically discussed in light of a unified theory of high-pressure gas discharges describing the sequence of ionization events from initial electron avalanches up to a partial or complete breakdown. The emphasis is given to the understanding of the formation of an active cathode spot by the streamer arrival to the cathode, which is the critical but still obscure phase of the breakdown development. Based on the analysis including a computer simulation model a hypothesis is advanced that also such widely studied and practically important gas discharge phenomena as negative corona Trichel pulses and fast ionization instabilities in cathode regions of high-pressure gas discharges are due to the formation of positive streamers in the immediate cathode vicinity. The proposed hypothesis offers attractive feature of the unification of a wide scale of high-pressure gas discharges within the general class of positive streamer initiated breakdown phenomena. Moreover, it provides indications for further study in the field both by experiment and computer simulations.

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Positive-streamer-like phenomena in point-plane corona gaps: Trichel pulses and high-pressure cathode sheath instabilities

Černák

Hosokawa

Inoshima

1990

Applied Physics Letters

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Current pulse shapes have been measured in negative and positive corona discharges mostly in dry air. Negative corona Trichel pulses and pulses corresponding to the primary streamer/cathode contact in a positive point-plane gap were found to exhibit remarkable similarities, indicating a positive-streamer-like mechanism for the Trichel pulse development. High-frequency instabilities of the high-pressure filamentary glow discharge, which can be responsible for the arcing from freshly polished cathodes, were observed and attributed to local positive-streamer-like breakdowns of the cathode sheath.

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Some properties of Trichel pulses with AC voltage

Cited by 7 publications

References 3 publications

Negative Corona Current Pulses and Cathode Sheath Instabilities in a Short Point-Plane Gap in CO2

Negative Corona Current Pulses and Cathode Sheath Instabilities in a Short Point-Plane Gap in CO2

Streamer breakdown: cathode spot formation, Trichel pulses and cathode-sheath instabilities

Positive-streamer-like phenomena in point-plane corona gaps: Trichel pulses and high-pressure cathode sheath instabilities

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