# Spark-Induced Shockwave Dynamics Revealed via Nonresonant Four-Wave Mixing

Source: [Spark-Induced Shockwave Dynamics Revealed via Nonresonant Four-Wave Mixing](<https://www.sota2.com/research/paper/69a5196c2d603e6de3e3c898>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2026-03-03T05:00:48.459Z

Authors: Marios Kounalakis, Mikhail N. Shneider, Alexandros Gerakis

Published: 2026-02-27T15:51:51.000Z

## Abstract

We report on the experimental detection of shockwave dynamics produced in a spark discharge, using a nonresonant four-wave mixing optical technique. In particular, we observe the spark-induced local density perturbation across a millimeter-range probe volume, centered on the discharge, via single-shot coherent Rayleigh-Brillouin scattering. We detect the emergence of shock-induced flow velocities, which appear as distinct features in the spectrum, and monitor their dynamic evolution from a few hundred nanoseconds to microseconds after the spark. Finally, we benchmark our measurements against simulations based on a one-dimensional compressible flow model. Our results pave the way for quantitative measurements of highly non-uniform transient flows in challenging environments featuring non-equilibrium gas kinetics.

## Recorded benchmark results

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/2602.24112>)

[PDF](<https://arxiv.org/pdf/2602.24112.pdf>)