Electric field measurements of DC-driven positive streamer coronas using the E-FISH method

This paper reports on electric field measurements, using the electric field-induced second harmonic (E-FISH) method, sampling the spatial structure and temporal development of DC-driven positive streamer coronas in atmospheric-pressure air at relevant timescales to examine the self-pulsating behavio...

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Bibliographic Details
Published in:Applied physics letters 2022-09, Vol.121 (11)
Main Authors: Strobel, Lee R., Martell, Benjamin C., Morozov, Anatoli, Dogariu, Arthur, Guerra-Garcia, Carmen
Format: Article
Language:English
Subjects:
Applied physics
Coronas
Discharge
Electric fields
ENGINEERING
Gas discharges
Positive ions
Streamer discharge
Wave propagation
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Summary:This paper reports on electric field measurements, using the electric field-induced second harmonic (E-FISH) method, sampling the spatial structure and temporal development of DC-driven positive streamer coronas in atmospheric-pressure air at relevant timescales to examine the self-pulsating behavior of the discharge. The discharge is triggered from a point-to-plate geometry and consists of transient coronas, which bridge the inter-electrode gap and pulsate at about 3 kHz, superimposed with a persisting glow corona. The measurements presented challenge the phenomenological explanation for the pulsations based on field recovery at the anode driven by the evacuation of positive ions by electric drift effects and hint at a propagating wave-like feature from the plate-cathode to the tip-anode.
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0100941