Study on the Two-Dimensional Density Distribution for Gas Plasmas Driven by Laser Pulse

Abstract

We perform an experimental study of two-dimensional (2D) electron density profiles of the laser-induced plasma plumes in air by ordinarily laboratorial interferometry. The electron density distributions measured show a feature of hollow core. To illustrate the feature, we present a theoretical investigation by using dynamics analysis. In the simulation, the propagation of laser pulse with the evolution of electron density is utilized to evaluate ionization of air target for the plasma-formation stage. In the plasma-expansion stage, a simple adiabatic fluid dynamics is used to calculate the evolution of plasma outward expansion. The simulations show good agreements with experimental results, and demonstrate an effective way of determining 2D density profiles of the laser-induced plasma plume in gas.

Investigation of the gas bubble dynamics induced by an electric arc in insulation oil

“…In fact, bubble dynamics has long been a field of focus due to its important applications in various fields, such as shipbuilding, ocean engineering, and medical science, and corresponding studies have been conducted covering many kinds of bubbles, including underwater explosion bubbles, spark bubbles, laser bubbles, and so on [16][17][18][19][20][21][22][23][24]. Arc-induced gas bubbles have distinct characteristics, which make it difficult to describe by previous models.…”

Temporal and spatial evolution of air-spark switch plasma investigated by the Mach–Zehnder interferometer

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