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

JIAO Zhihong (焦志宏); WANG Guoli (王国利); ZHOU Xiaoxin (周效信); WU Chaohui (吴朝辉); ZUO Yanlei (左言磊); ZENG Xiaoming (曾小明); ZHOU Kainan (周凯南); SU Jingqin (粟敬钦)

doi:10.1088/1009-0630/18/12/05

Plasma Science and Technology > 2016 > 18(12): 1169-1174. > DOI: 10.1088/1009-0630/18/12/05

JIAO Zhihong (焦志宏), WANG Guoli (王国利), ZHOU Xiaoxin (周效信), WU Chaohui (吴朝辉), ZUO Yanlei (左言磊), ZENG Xiaoming (曾小明), ZHOU Kainan (周凯南), SU Jingqin (粟敬钦). Study on the Two-Dimensional Density Distribution for Gas Plasmas Driven by Laser Pulse[J]. Plasma Science and Technology, 2016, 18(12): 1169-1174. DOI: 10.1088/1009-0630/18/12/05

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

1College of Physics and Electronic Engineering, Northwest Normal University, Lanzhou 730070, China 2Laser Fusion Research Center, China Academy of Engineering Physics, Mianyang 621900, China

Funds: supported by National Natural Science Foundation of China (Nos. 11264036, 11465016 and 11364038)

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Received Date: February 21, 2016

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Abstract

Abstract

We perform an experimental study of two-dimensional (2D) electron density pro?les 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.
- laser breakdown,
- gas plasmas,
- 2D density distribution,
- optical interferometry,
- photoionization,
- avalanche ionization,
- laser propagation,
- fluid dynamics

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References

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