Reduce of threshold of laser inducing breakdown in atmosphere by introducing an electric spark

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	Reduce of threshold of laser inducing breakdown in atmosphere by introducing an electric spark
	Zhang, XB ; Shi, W ; Li, H ; Li H(李华)
作者部门	系统工程部
	2005-11-01
发表期刊	CHINESE PHYSICS LETTERS
ISSN	0256-307X
卷号	22 期号:11 页码:2885-2887
摘要	We report laser-generated plasmas in atmosphere with electrical spark generated by a synchronization circuit. The breakdown thresholds under the conditions that the electrical spark is used and not used are compared. The breakdown threshold has a distinct decrease after the electrical spark is used. Breakdown thresholds as a function of atmosphere pressure have also been measured at laser wavelengths 532 nm and 1064 rim for the laser pulse width of 15ns. We also discuss the principle and performances of the ionized atmosphere by Nd:YAG laser under the condition of electrical spark introduction. Multiphoton ionization and cascade ionization play important roles in the whole process of atmosphere ionization. The free electron induced by electrical spark can supply the initialization free electron number for multiphoton ionization and cascade ionization. A model for breakdown in atmosphere, which is in good agreement with the experimental results, is described.
文章类型	Article
学科领域	物理学
WOS标题词	Science & Technology ; Physical Sciences
收录类别	SCI
关键词[WOS]	PLASMAS ; EMISSION
语种	英语
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
WOS记录号	WOS:000233180800044
引用统计
文献类型	期刊论文
条目标识符	http://ir.opt.ac.cn/handle/181661/7434
专题	装校技术研究中心
通讯作者	Li H(李华)
作者单位	1.Xian Univ Technol, Dept Appl Phys, Xian 710048, Peoples R China 2.Chinese Acad Sci, Xian Inst Opt & Fine Mech, Xian 710068, Peoples R China
推荐引用方式 GB/T 7714	Zhang, XB,Shi, W,Li, H,et al. Reduce of threshold of laser inducing breakdown in atmosphere by introducing an electric spark[J]. CHINESE PHYSICS LETTERS,2005,22(11):2885-2887.
APA	Zhang, XB,Shi, W,Li, H,&李华.(2005).Reduce of threshold of laser inducing breakdown in atmosphere by introducing an electric spark.CHINESE PHYSICS LETTERS,22(11),2885-2887.
MLA	Zhang, XB,et al."Reduce of threshold of laser inducing breakdown in atmosphere by introducing an electric spark".CHINESE PHYSICS LETTERS 22.11(2005):2885-2887.

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