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arXiv · 2302.12975

3D tracking of particles in a dusty plasma by laser sheet tomography

Wentao Yu·Justin C. Burton
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Abstract

The collective behavior of levitated particles in a weakly-ionized plasma (dusty plasma) has raised significant scientific interest. This is due to the complex array of forces acting on the particles, and their potential to act as in-situ diagnostics of the plasma environment. Ideally, the three-dimensional (3D) motion of many particles should be tracked for long periods of time. Typically, stereoscopic imaging using multiple cameras combined with particle image velocimetry (PIV) is used to obtain a velocity field of many particles, yet this method is limited by its sample volume and short time scales. Here we demonstrate a different, high-speed tomographic imaging method capable of tracking individual particles. We use a scanning laser sheet coupled to a single high-speed camera. We are able to identify and track tens of individual particles over centimeter length scales for several minutes, corresponding to more than 10,000 frames.

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Wentao Yu, Justin C. Burton. 2023-02-25. 3D tracking of particles in a dusty plasma by laser sheet tomography. https://doi.org/10.1063/5.0147458

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