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This research aims to understand how varying pulse width impacts the characteristics of an argon plasma submerged in water.

March 7, 2026Open Access

Spatiotemporal analysis of a short pulse argon plasma submerged in water

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Investigates how pulse width affects argon plasma properties in water, suggesting important applications in liquid treatment.

This research aims to understand how varying pulse width impacts the characteristics of an argon plasma submerged in water.
Utilized high-voltage pulses of 11 kV ranging from 50 to 350 ns at a frequency of 1 kHz
Conducted electrical measurements and spatio-temporal optical emission spectroscopy
Analyzed plasma dynamics, including the emission profiles of argon and hydrogen.
Plasma fills the electrode gap within the first 15 ns of the pulse
Voltage collapses after gap closure, with current rising to a power supply-determined value
Argon dominates the initial emission, but hydrogen emission increases over time due to water vapor dissociation
Electron density remains substantial for several microseconds post-pulse, scaling with pulse width.

Johnson et al. (2025) studied this question.

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