Nanosecond discharge in distilled water in an inhomogeneous electric field

Dmitry Beloplotov; Dmitry Sorokin

doi:10.1117/12.3011228

2 November 2023 Nanosecond discharge in distilled water in an inhomogeneous electric field

Dmitry Beloplotov, Dmitry Sorokin

Proceedings Volume 12920, XVI International Conference on Pulsed Lasers and Laser Applications; 129200D (2023) https://doi.org/10.1117/12.3011228
Event: XVI International Conference on Pulsed Lasers and Laser Applications, 2023, Tomsk, Russian Federation

Abstract

The development of nanosecond discharge in 2-mm point-to-plane or point-to-point gaps filled with distilled water has been studied with a fast-framing device. Positive nanosecond voltage pulses with an amplitude of 25 kV (50 kV in idle mode) were applied via a 75-Ohm transmission line to the gap. The pointed electrodes were made of pieces of sewing needles. Time-resolved images of discharge were taken with a four-channel intensified charge-coupled device (ICCD) camera with simultaneous recording voltage and current waveforms with an 8-GHz oscilloscope. The ICCD camera takes three consecutive and one time-integrated image. It was observed that one or several streamers appeared on the surface of the positive needle tip. They branched forming a semblance of a crown that occupied a large region near the needle. When reflected pulses with negative polarity arrived on the pointed electrode, streamers did not grow. When the next positive pulse arrived on the pointed electrode, the streamers began to grow again, while actively branching. In the point-to-point gap, streamers developed from both needles. The collision of streamers was observed. A bright light flash accompanies the collision. A long afterglow was observed in the place of streamer collision.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Dmitry Beloplotov and Dmitry Sorokin "Nanosecond discharge in distilled water in an inhomogeneous electric field", Proc. SPIE 12920, XVI International Conference on Pulsed Lasers and Laser Applications, 129200D (2 November 2023); https://doi.org/10.1117/12.3011228

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