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Fluorescence measurement and acoustic diagnostics of plasma channels in air

Yu Jin Zang Chong-Zhi Hao Zuo-Qiang Zhang Jie Zhang Zhe Jin Zhan Wang Zhao-Hua Wei Zhi-Yi Zhong Jia-Yong

Fluorescence measurement and acoustic diagnostics of plasma channels in air

Yu Jin, Zang Chong-Zhi, Hao Zuo-Qiang, Zhang Jie, Zhang Zhe, Jin Zhan, Wang Zhao-Hua, Wei Zhi-Yi, Zhong Jia-Yong
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  • Received Date:  09 March 2005
  • Accepted Date:  08 May 2005
  • Published Online:  20 January 2006

Fluorescence measurement and acoustic diagnostics of plasma channels in air

  • 1. (1)Laboratoire de Spectrométrie Ionique et Moléculaire,UMR CNRS 5579,Université Claude Bernard-Lyon 1,43,Bd. du 11 Novembre 1918,F-69622 Villeurbanne Cedex,France; (2)北京大学物理学院,北京 100871; (3)中国科学院物理研究所光物理重点实验室,北京 100080; (4)中国科学院物理研究所光物理重点实验室,北京 100080;中国科学院国家天文台,北京 100012

Abstract: A plasma channel up to 80 Rayleigh lengths is formed when intense femtosecond laser pulses propagate in air. Two methods, fluorescence measurement and acoustic diagnostics, are used to probe the plasma channel simultaneously. Both methods reveal the evolution of the channel in detail. Compared with the fluorescence measurement, the acoustic method is a convenient approach having higher sensitivity and higher spatial resolution in detecting long plasma channels.

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