%0 Journal Article
%T Experimental diagnosis of electron density of laser induced air plasma by interferometry<br>干涉法诊断由纳秒激光诱导产生的大气等离子体的电子密度
%A Zhang Hong-Chao
%A Lu Jian
%A Ni Xiao-Wu
%A <br>张宏超
%A 陆建
%A 倪晓武
%J 物理学报
%D 2009
%I 
%X High quality interference pattern was obtained with a modified Mach-Zehnder interferomenter. An FFT analysis is applied to extracting the phase of the reconstructed interferograms, and then the inverse Abel transformation is used to calculate the three-dimensional electron density distribution. The electron density and the plasma expanding velocity at various delay times were obtained. The results show that the formation of the plasma channel in the early stage of the laser induces air plasma, and the rapid decrease of the plasma expanding velocity accelerates the collapse of the plasma channel. At about 48 nanosecond time, the eccentricity of the plasma shape reaches the maximum value and then evolves to a circular shape.
%K 激光等离子体电子密度，
%K 干涉测量，
%K Abel逆变换
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=399A183EA8354B86848E03B1E9A1A747&yid=DE12191FBD62783C&vid=9FFCC7AF50CAEBF7&iid=B31275AF3241DB2D&sid=16096B70FDB7A1A5&eid=292506D9FA175BE3&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=0