Study on the Two-Dimensional Density Distribution for Gas Plasmas Driven by Laser Pulse
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 invest...
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| Published in | Plasma science & technology Vol. 18; no. 12; pp. 1169 - 1174 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
01.12.2016
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| Online Access | Get full text |
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| Summary: | 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. |
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| Bibliography: | 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. 3IAO Zhihong 1, WANG Guoli 1, ZHOU Xiaoxin1, WU Chaohui2, ZUO Yanlei 2, ZENG Xiaoming2, ZHOU Kainan2, SU Jingqin2 （1College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 731070, China 2Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900 China） laser breakdown gas plasmas 2D density distribution optical interferometry photoionization avalanche ionization laser propagation fluid dynamics 34-1187/TL |
| ISSN: | 1009-0630 |
| DOI: | 10.1088/1009-0630/18/12/05 |