Inverse bremsstrahlung effect in process of laser-induced copper plasma

ZHAO Xiaoxia; HE Junfang; WANG Hongying; YANG Senlin; LI Yuanyuan; ZHANG Xiangwu

doi:10.7510/jgjs.issn.1001-3806.2014.03.015

In order to study inverse bremsstrahlung (IB) effect in process of laser-induced copper plasma, copper plasma was induced by Nd：YAG laser at 1064nm. The electron temperature 6902K of the copper plasma was calculated with the Boltzmann plot of 3 Cu Ⅰ lines. By measuring the Stark broadening of Cu Ⅰ at 324.75nm, its electron density of 3.6×1017cm-3 was obtained. Based on these characteristic parameters of copper plasma, the inverse bremsstrahlung coefficient of 0.021cm-1 was obtained. Experimental results show that the plasma parameters can be obtained without any disturbance with the spectral analysis method.

Inverse bremsstrahlung effect in process of laser-induced copper plasma

1. Institution of Applied Physics, Xi'an University of Arts and Science, Xi'an 710065, China

Received Date: 2013-07-15

Accepted Date: 2013-07-17

Available Online: 2014-05-25

Abstract: In order to study inverse bremsstrahlung (IB) effect in process of laser-induced copper plasma, copper plasma was induced by Nd：YAG laser at 1064nm. The electron temperature 6902K of the copper plasma was calculated with the Boltzmann plot of 3 Cu Ⅰ lines. By measuring the Stark broadening of Cu Ⅰ at 324.75nm, its electron density of 3.6×1017cm-3 was obtained. Based on these characteristic parameters of copper plasma, the inverse bremsstrahlung coefficient of 0.021cm-1 was obtained. Experimental results show that the plasma parameters can be obtained without any disturbance with the spectral analysis method.

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Reference (10)

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Inverse bremsstrahlung effect in process of laser-induced copper plasma

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