Development of Discharge in a Saline Solution at Near-Threshold Voltages

Journal Article · Fri Jun 15 04:00:00 EDT 2018 · Plasma Physics Reports

DOI:https://doi.org/10.1134/S1063780X18060053· OSTI ID:22763262

Shemyakin, I. A.; Kasyanov, V. S.; Geyman, V. G.; Bolotov, A. V.; Nekhoroshev, V. O. ^[1]

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1. Russian Academy of Sciences, Institute of High-Current Electronics, Siberian Branch (Russian Federation)

The development of a discharge in a point−plane gap filled with a saline solution with a salt content of 3% was studied experimentally. The duration of the voltage pulse applied to the gap was about 2 ms. Data are presented on the formation dynamics of gas microcavities at near-threshold voltages at which gas-discharge plasma appears in some microcavities. The cavities are conglomerates of microbubbles with a typical size of ≈100 μm. At the threshold voltage (≈750 V), the active electrode is covered with a gas layer and the gap voltage is in fact applied to this layer, which leads to the development of discharges in individual microbubbles. In this case, the discharge operates in the form of short current pulses. The number of microcavities filled with plasma increases as the voltage grows above the threshold value. At the plasma boundary, new microbubbles are formed, in which discharges are ignited. As a result, the plasma front propagates from the active electrode into the gap with a characteristic velocity of 10{sup 3} cm/s.

• OSTI ID: 22763262
• Journal Information: Plasma Physics Reports, Journal Name: Plasma Physics Reports Journal Issue: 6 Vol. 44; ISSN PPHREM; ISSN 1063-780X
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CONGLOMERATES
ELECTRIC POTENTIAL
ELECTRODES
LAYERS
MATHEMATICAL SOLUTIONS
PLASMA
PULSES
SALTS