Glow Discharge With a Hollow Cathode in Carbon Dioxide

Lisovskiy, Valeriy; Dudin, S.V.; Platonov, P.P.; Osmayev, R.O.; Yegorenkov, Vladimir

doi:10.46813/2022-142-079

Cited by 2 publications

(1 citation statement)

References 24 publications

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“…References [13][14][15] conducted a comprehensive study on the erosion characteristics of tungsten-copper alloy electrodes. From the perspective of structure, researchers have studied the effects of the discharge tube's electrode gap and electrode structure on the breakdown voltage, the response time, the current capacity, and other discharge tube characteristics [16][17][18][19]. In the field of spark gap switches, Gӧrtler and Heo covered the SiC material for its high thermal conductivity and melting point on the surface of the basic electrode to form an approximate double-layer electrode in order to reduce electrode surface erosion [20,21].…”

Section: Introductionmentioning

confidence: 99%

Reliability improvement of gas discharge tube by suppressing the formation of short-circuit pathways

Cheng¹,

Xiang²,

Li³

et al. 2022

Plasma Sci. Technol.

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After cumulative discharge of gas discharge tube (GDT), it is easy to form a short circuit pathway between the two electrodes, which increases the failure risk and causes severe influences on the protected object. To reduce the failure risk of GDT and improve cumulative discharge times before failure, this work aims to suppress the formation of two short-circuit pathways by optimizing the tube wall structure, the electrode materials and the electrode structure. A total of five improved GDT samples are designed by focusing on the insulation resistance change that occurs after the improvement; then, by combining these designs with the microscopic morphology changes inside the cavity and the differences in deposition composition, the reasons for the differences in the GDT failure risk are also analyzed. The experimental results show that compared with GDT of traditional structure and material, the method of adding grooves at both ends of the tube wall can effectively block the deposition pathway of the tube wall, and the cumulative discharge times before device failure are increased by 149%. On this basis, when the iron-nickel electrode is replaced with a tungsten-copper electrode, the difference in the electrode’s surface splash characteristics further extends the discharge times before failure by 183%. In addition, when compared with the traditional electrode structure, the method of adding an annular structure at the electrode edge to block the splashing pathway for the particles on the electrode surface shows no positive effect, and the cumulative discharge times before the failure of the two structures are reduced by 22.8% and 49.7% respectively. Among these improved structures, the samples with grooves at both ends of the tube wall and tungsten-copper as their electrode material have the lowest failure risk.

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Section: Introductionmentioning

confidence: 99%

Reliability improvement of gas discharge tube by suppressing the formation of short-circuit pathways

Cheng¹,

Xiang²,

Li³

et al. 2022

Plasma Sci. Technol.

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Control of Reduced Electric Field in the Positive Column of a Pulsed Discharge in Co2

Lisovskiy¹,

Dudin²,

Vusyk³

et al. 2023

Problems of Atomic Science and Technology

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The electric field strength in the positive column of dc and bipolar pulsed discharges in carbon dioxide was determined by the method of moving electrodes. It is shown that an increase in the frequency of the pulse voltage leads to the electric field strength increase. The following values of the reduced electric field E/p for a gas pressure of 0.5 Torr were obtained: 22.5 V/(cmTorr) for dc discharge, 30 V/(cmTorr) for pulsed discharge at 20 kHz for lowcurrent mode and 32 V/(cmTorr) for high-current mode, and 36.6 V/(cmTorr) for 75 kHz. We see that in the dc discharge, the reduced electric field is weak, due to which the exchange of vibrational energy between CO2 molecules dominates the conversion process. The increase of the electric field strength in the positive column of a pulsed discharge, especially under conditions of gas heating, allows obtaining E/N > 100 Td when the process of direct dissociation of CO2 molecules by fast electrons makes the main contribution to the conversion process.

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Glow Discharge With a Hollow Cathode in Carbon Dioxide

Cited by 2 publications

References 24 publications

Reliability improvement of gas discharge tube by suppressing the formation of short-circuit pathways

Reliability improvement of gas discharge tube by suppressing the formation of short-circuit pathways

Control of Reduced Electric Field in the Positive Column of a Pulsed Discharge in Co2

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