Optical interferometry of high-energy nanosecond pin-to-pin discharges in atmospheric air

Babusis, Nicholas; Jeong, Won Joon; Shashurin, Alexey

doi:10.1088/1361-6595/adae30

Optical interferometry of high-energy nanosecond pin-to-pin discharges in atmospheric air

Journal Article · Thu Jan 30 23:00:00 EST 2025 · Plasma Sources Science and Technology

DOI:https://doi.org/10.1088/1361-6595/adae30· OSTI ID:3008709

^[1]; Jeong, Won Joon ^[1]; ^[1]

Purdue Univ., West Lafayette, IN (United States)

This paper describes the construction and application of an optical-frequency Michelson interferometer for measuring electron number density within high-energy, high-power nanosecond pin-to-pin discharges (>10 mJ pulse energy, >1 MW pulse power). A 21 mJ, 11 ns spark across a 3 mm pin-to-pin electrode gap was analyzed at 7 ns into the discharge to demonstrate the operation of the interferometer. A peak electron density of 2.3 × 10¹⁷ cm⁻³ was observed at these conditions, and it was consistent with estimates of plasma channel resistance based on V–I measurements. This initial work paves the way for a larger parametric study of the spatial and temporal dynamics of electron number density in nanosecond pin-do-pin discharges under various conditions.

View Accepted Manuscript (DOE)

Research Organization:: Purdue Univ., West Lafayette, IN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0023209

OSTI ID:: 3008709

Alternate ID(s):: OSTI ID: 2506873

Report Number(s):: DOE; SC0023209

Journal Information:: Plasma Sources Science and Technology, Journal Name: Plasma Sources Science and Technology Journal Issue: 1 Vol. 34; ISSN 1361-6595; ISSN 0963-0252

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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