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

## TL;DR

This paper introduces a high-speed tomographic imaging technique using a scanning laser sheet and a single camera to track individual particles in a dusty plasma over extended periods and larger volumes, surpassing traditional methods.

## Contribution

The novel method enables long-duration, large-volume 3D particle tracking in dusty plasmas using laser sheet tomography with a single high-speed camera.

## Key findings

- Tracked tens of particles over centimeter scales for minutes
- Captured over 10,000 frames in a single experiment
- Demonstrated extended 3D particle tracking capabilities

## 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.