Tracking and Linking of Microparticle Trajectories During Mode-Coupling Induced Melting in a Two-Dimensional Complex...

Area of Science:

• Plasma Physics
• Complex Systems
• Materials Science

Background:

• Studying the melting of complex plasma crystals is crucial for understanding phase transitions in non-neutral plasmas.
• Microparticle tracking in such systems is challenging due to 3D motion and illumination variations.

Purpose of the Study:

• To develop and present a robust strategy for tracking microparticles and linking their trajectories.
• To adapt this strategy for analyzing the melting of a quasi two-dimensional complex plasma crystal induced by mode-coupling instability.

Main Methods:

• Implemented a two-pass noise removal process using Gaussian blurring with varying kernel widths.
• Enhanced signal-to-noise ratio for improved microparticle detection via intensity thresholding.
• Utilized position prediction to reconstruct long particle trajectories for accurate analysis.

Main Results:

• Successfully tracked poorly illuminated microparticles despite challenging imaging conditions.
• Reconstructed long particle trajectories, enabling precise measurement of microparticle energies.
• Monitored the evolution of monolayer properties during crystal melting.

Conclusions:

• The developed tracking strategy effectively overcomes challenges in microparticle analysis within complex plasma crystals.
• This method allows for accurate characterization of microparticle behavior and system dynamics during phase transitions.