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The Effect of Confinement Angle on Self-Colliding Aluminium Laser Plasmas Using Spectrally Resolved Fast Imaging
Lazaros Varvarezos1, Stephen J Davitt1, John T Costello1
1School of Physical Sciences and National Centre for Plasma Science and Technology, Dublin City University, 9 D09 Dublin, Ireland.
Materials (Basel, Switzerland)
|December 5, 2020
Summary
The confinement angle of V-shaped targets significantly impacts self-colliding aluminum laser-produced plasmas. Plasma expansion, interaction, and species distribution change with varying angles, influencing recombination processes.
Area of Science:
- Plasma Physics
- Laser-Induced Breakdown Spectroscopy (LIBS)
Background:
- Laser-produced plasmas (LPPs) are crucial in various applications.
- Understanding plasma dynamics in confined geometries is essential for controlling LPP behavior.
Purpose of the Study:
- To investigate the influence of confinement geometry on self-colliding aluminum LPPs.
- To analyze plasma formation, expansion, and species distribution within V-shaped channels.
Main Methods:
- Utilized V-shaped channel targets with varying angles (90°, 60°, 30°).
- Employed broadband and spectrally filtered time-resolved fast imaging.
- Analyzed plasma formation and species distribution in ambient air.
Main Results:
- Broadband imaging indicated normal plasma expansion from channel walls and potential stagnation.
- Filtered imaging revealed spatial distribution of different aluminum species.
- Observed signatures of forced recombination within the confined plasmas.
Conclusions:
- The confinement angle critically affects the dynamics of self-colliding LPPs.
- Varying angles alter plasma interaction, species distribution, and recombination.
- Results provide insights for optimizing LPP applications using tailored target geometries.
