Numerical study on prolonging lifetime of plasma channels generated by ultra-short laser pulses

Chen Wen; Fan Chengyu; Wang Haitao; Zhang Pengfei; Zhang Jinghui; Qiao Chunhong; Ma Huimin

Volume 25 Issue 04

Mar. 2013

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(04): 813-816

zhu zhong-ming, wang xu-ben, zhang shuang-shi. Study of exploration capability of pseudo-random code UWB short pulse[J]. High Power Laser and Particle Beams, 2006, 18.

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Chen Wen, Fan Chengyu, Wang Haitao, et al. Numerical study on prolonging lifetime of plasma channels generated by ultra-short laser pulses[J]. High Power Laser and Particle Beams, 2013, 25: 813-816.

zhu zhong-ming, wang xu-ben, zhang shuang-shi. Study of exploration capability of pseudo-random code UWB short pulse[J]. High Power Laser and Particle Beams, 2006, 18.

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Numerical study on prolonging lifetime of plasma channels generated by ultra-short laser pulses

1.
Key Laboratory of Atmospheric Composition and Optical Radiation,Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Hefei 230031,China

Received Date: 2012-06-26
Rev Recd Date: 2012-11-16
Publish Date: 2013-03-09

Abstract

Abstract

The density and decay kinetics of a plasma channel produced in air by a self-guided intense femtosecond laser pulse is investigated by numerical simulation method. The two-body, three-body dissociation attachment and the recombination of the free electrons, positive and negative ions are considered in the theoretical model. The influence of dissociation attachment caused by the subsequently incident laser on the generated plasma channel has been studied and the effective control parameters of the subsequent laser can be obtained. The calculation shows that the lifetime of the channel is sensitive to the initial conditions of the subsequent laser and the relative delay between the subsequent laser and the maximum plasma density. The corresponding lifetime of the revived plasma channel can be efficiently extended to more than 25 s, in the case that the subsequent laser is sufficiently controlled under optimum parameters.
- femtosecond laser plasmas,
- plasma channel,
- dissociation attachment,
- lifetime

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