1D time evolving electric field profile measurements with sub-ns resolution using the E-FISH method

Benjamin M. Goldberg, Stephan Reuter, Arthur Dogariu, Richard B. Miles

Research output: Contribution to journalArticle

6 Scopus citations

Abstract

We present an approach for the measurement of time evolving electric field profiles in atmospheric pressure plasma discharges using electric field induced second harmonic generation (E-FISH). While the E-FISH effect has been known of for some time, recent advances in laser and detection technology have allowed the method to be utilized for spatial measurements of an arbitrarily applied electric field. A cylindrical lens is used to focus the femtosecond laser light to a line and an intensified charge coupled device is used for detection, allowing for one-dimensional (1D) spatial resolution on the order of ∼50 μm. Measurements have been carried out verifying the spatial resolution using a spatially periodic, localized electric field. Calibrated 1D electric field measurements have been completed with a time resolution of 500 ps in a laminar cold atmospheric pressure plasma jet with argon core flow and N2 co-flow powered by a nanosecond (ns) pulse dielectric barrier discharge. The field was shown to propagate as an ionization wave, with a velocity of ∼0.3 mm∕ns.

Original languageEnglish (US)
Pages (from-to)3853-3856
Number of pages4
JournalOptics Letters
Volume44
Issue number15
DOIs
StatePublished - Aug 1 2019

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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